About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsPower Supplies - (Board Mount)DC DC ConvertersWRF1209S-1WR2
WRF1209S-1WR2 Image
WRF1209S-1WR2 Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

WRF1209S-1WR2 - Mornsun America, LLC

Manufacturer Part Number
WRF1209S-1WR2
Manufacturer
Mornsun
Allelco Part Number
98D-WRF1209S-1WR2
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
44,564 pcs available, New & Original
Parts Description
ISOLATED MODULE DC DC CONVERTER
Package
8-SIP Module, 7 Leads
Data sheet
-
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 44564
  • Unit Price: $10.62
  • Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
1+ $10.62 $10.62
198+ $4.24 $839.52
506+ $4.10 $2,074.60
990+ $4.03 $3,989.70
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

WRF1209S-1WR2 Tech Specifications
Mornsun America, LLC - WRF1209S-1WR2 technical specifications, attributes, parameters and parts with similar specifications to Mornsun America, LLC - WRF1209S-1WR2

Product Attribute Attribute Value
Manufacturer Mornsun
Voltage - Output 4 -
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 9V
Voltage - Isolation 3 kV
Voltage - Input (Min) 9V
Voltage - Input (Max) 18V
Type Isolated Module
Supplier Device Package -
Standard Number 62368-1
Size / Dimension 0.87" L x 0.37" W x 0.47" H (22.0mm x 9.5mm x 12.0mm)
Series WRF_S-1WR2 (1W)
Product Attribute Attribute Value
Power (Watts) 1 W
Package / Case 8-SIP Module, 7 Leads
Package Tube
Operating Temperature -40°C ~ 85°C
Number of Outputs 1
Mounting Type Through Hole
Features Remote On/Off
Efficiency 79%
Current - Output (Max) 111mA
Control Features -
Approval Agency CE, EN, UKCA
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.40.9580

Frequently Asked Questions(FAQ)

What are the key electrical performance characteristics of the WRF1209S-1WR2 isolated DC-DC converter, and how do they impact system-level power budgeting in commercial ITE applications?
The WRF1209S-1WR2 delivers a regulated 9V output at up to 111mA (1W) from an input range of 9V to 18V, making it suitable for stepping down higher-voltage rails while maintaining isolation. With an efficiency rating of 79%, approximately 21% of input power is dissipated as heat under full load, which must be factored into thermal management planning. This level of efficiency is typical for compact 1W modules and reflects a balance between size, isolation capability, and power handling. In commercial information technology equipment (ITE), this efficiency supports compliance with energy standards without requiring large heatsinks, though continuous operation near maximum current may necessitate airflow or conduction cooling depending on ambient conditions.
How does the isolation voltage rating of the WRF1209S-1WR2 compare to other 1W isolated converters in similar form factors, and what design implications arise when selecting between isolation levels?
The WRF1209S-1WR2 provides 3 kV of isolation between input and output, which exceeds basic safety requirements for Class II equipment under IEC 62368-1 but falls short of industrial-grade 4 kV or higher ratings found in some ruggedized converters. When compared to alternatives like Mornsun’s WRB series or RECOM’s R-78 series, most standard commercial-grade 1W modules offer 1.5 kV to 3 kV isolation, meaning the WRF1209S-1WR2 sits near the upper end of the common range. Designers should verify whether their application requires reinforced insulation or functional-only isolation; for medical or high-reliability systems, additional external isolation components might still be needed despite the module’s internal barrier.
Can the WRF1209S-1WR2 support remote ON/OFF control in industrial environments where power sequencing is critical, and how does this feature interact with its operating temperature range?
Yes, the WRF1209S-1WR2 includes remote On/Off functionality that allows external logic signals to enable or disable the converter via dedicated pins. This control method is compatible with CMOS and TTL logic levels and does not require external pull-up resistors due to internal circuitry. Importantly, this feature operates reliably across the full specified temperature range of -40°C to +85°C, ensuring consistent behavior in harsh environments such as factory automation or transportation systems. However, users must ensure that the control signal rise/fall times remain within acceptable thresholds to avoid unintended switching during startup or fault conditions.
What are the mounting and physical constraints when integrating the WRF1209S-1WR2 into a through-hole PCB assembly, and how do dimensional tolerances affect layout density?
The WRF1209S-1WR2 measures 22.0 mm × 9.5 mm × 12.0 mm and uses a 7-lead SIP (Single Inline Package) configuration designed for through-hole mounting. Its low profile and narrow footprint allow placement on both sides of a PCB if double-sided assembly is used, provided clearance is maintained above and below the module to accommodate component height and airflow. Due to its small size, adjacent components must be spaced to prevent thermal coupling and mechanical interference, especially considering the maximum current draw of 111 mA and associated trace width requirements. Thermal vias under the module can improve heat dissipation but should avoid contact with the bottom leads to maintain electrical integrity.
How does the moisture sensitivity level (MSL) classification of the WRF1209S-1WR2 influence handling procedures during manufacturing, particularly in high-humidity foundries?
The WRF1209S-1WR2 has an MSL rating of 1, indicating it is non-sensitive to moisture and can be stored indefinitely without baking prior to reflow soldering. This simplifies supply chain logistics and reduces processing steps in high-volume production environments where humidity control may vary. Unlike components rated MSL 2 or higher, this module does not require special packaging or pre-conditioning before wave or reflow soldering, streamlining manufacturing workflows and reducing risk of voiding warranty due to improper handling.
In what scenarios would the WRF1209S-1WR2 be preferred over a non-isolated buck regulator for a 9V output derived from a 12V automotive bus?
The WRF1209S-1WR2 is advantageous when galvanic isolation is required—such as between primary and secondary circuits in battery management systems or sensor interfaces—where ground loops or transients could compromise signal integrity. Compared to non-isolated buck regulators like the LMZ31503, the WRF1209S-1WR2 adds safety certification (CE, UKCA, EN 62368-1), eliminates need for opto-isolation or TVS diodes on the output, and provides predictable transient response due to built-in feedback and filtering. While less efficient than modern synchronous buck converters at 1W output, its integrated isolation reduces board complexity and enhances EMI compliance in automotive auxiliary power units.
How does the RoHS3 compliance status of the WRF1209S-1WR2 align with global regulatory requirements, and what materials should engineers verify during component sourcing?
The WRF1209S-1WR2 meets RoHS3 standards, which prohibit hazardous substances including lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and specific phthalates (DEHP, BBP, DBP, DIBP). This ensures compatibility with international regulations such as EU Directive 2011/65/EU and REACH SVHC restrictions. Engineers should confirm that the module’s solder finish (typically tin-lead-free SAC305 or equivalent) and conformal coating, if present, also comply with these limits. Since Mornsun certifies RoHS3 compliance, no additional documentation is typically required beyond procurement records, but batch traceability should be maintained for audits.
What are the typical applications for the WRF1209S-1WR2 beyond standard industrial control, and how does its efficiency profile affect long-term operational costs in edge computing deployments?
Beyond traditional industrial automation, the WRF1209S-1WR2 finds use in telecommunications equipment, LED lighting controllers, and embedded test instruments where space, safety, and noise immunity are priorities. Although its 79% efficiency is modest by modern switching standards, over a year of continuous operation at 50% load (≈0.5W average), the wasted energy amounts to roughly 4.4 kWh—equivalent to several hours of operation at full load. For low-power edge nodes deployed at scale, this inefficiency translates into higher cooling needs and utility costs, suggesting that while the module is sufficient for many applications, higher-efficiency alternatives should be considered in thermally constrained or energy-sensitive designs.
How does the WRF1209S-1WR2 handle transient input conditions such as load dumps or inrush surges commonly encountered in automotive or telecom systems?
The WRF1209S-1WR2 is designed to withstand input voltages up to 18V, which accommodates moderate transients above nominal 12V systems (e.g., ISO 7637-2 pulse 1 and 2a). However, sustained overvoltage beyond 18V risks damaging internal components, so external protection like transient voltage suppressors (TVS) may still be necessary in harsh environments. The module lacks active soft-start or current limiting beyond its internal foldback protection, so fast load transients can cause brief output droop. Designers should ensure that input capacitance does not create excessive inrush currents during hot-plug events, possibly requiring NTC thermistors or controlled MOSFET switches in sensitive applications.
Can multiple WRF1209S-1WR2 units be paralleled to increase output current, and what precautions are required to maintain stability and isolation integrity?
Parallel operation of the WRF1209S-1WR2 modules is not recommended due to potential circulating currents and unequal load sharing between isolated channels. Even with matched output voltages, slight variations in regulation or timing can cause one unit to dominate current delivery while another remains underutilized. Furthermore, paralleling breaks the 3 kV isolation barrier, effectively creating a single-point failure mode and violating safety standards. If higher current is needed, designers should select a single module with greater capacity or use a different topology altogether, such as a higher-wattage isolated converter or a non-isolated post-regulator after the WRF1209S-1WR2.
How does the operating temperature range of the WRF1209S-1WR2 compare to ceramic capacitor-based solutions, and what derating guidelines apply under continuous high-load conditions?
The WRF1209S-1WR2 operates from -40°C to +85°C, matching the typical range of X7R or X5R multilayer ceramic capacitors used in power supply designs. However, under continuous full-load operation (111 mA), internal semiconductor junctions and magnetic components may experience temperatures exceeding ambient by 20–30°C, potentially pushing localized areas close to the upper limit even if the case temperature stays within spec. Best practice dictates derating the output current by 10–20% in enclosed or poorly ventilated enclosures to ensure long-term reliability and prevent accelerated aging of internal components, especially electrolytic capacitors if present in auxiliary circuits.
What are the implications of using the WRF1209S-1WR2 in a system requiring UL certification, given its existing approvals?
The WRF1209S-1WR2 carries CE, EN, and UKCA markings based on compliance with IEC 62368-1, but does not list UL or CSA certifications in the provided data. While this may still be acceptable in regions outside North America, any product claiming UL listing must explicitly state it. If UL certification is required, engineers should either source a version with formal UL recognition (e.g., UL 62368-1) or implement additional safety margins and documentation to support self-certification—though this increases liability risk. Always consult the manufacturer’s latest declaration of conformity before finalizing compliance strategy.
How does the package type of the WRF1209S-1WR2 influence its suitability for automated pick-and-place versus manual assembly processes?
As a through-hole SIP module, the WRF1209S-1WR2 is inherently incompatible with standard surface-mount assembly lines unless retrofitted with wave soldering fixtures or used in mixed-technology boards processed manually or semi-automatically. Its leaded construction makes it more suitable for hand-soldering or selective soldering in low-volume prototyping or service environments. For high-volume production, designers seeking automation benefits should consider leadless alternatives from Mornsun such as the WRP series, though these may sacrifice some mechanical robustness or isolation ratings. The tube packaging further suggests it is optimized for manual or small-batch handling rather than tape-and-reel logistics.
What role does the 3 kV isolation play in meeting electromagnetic compatibility (EMC) requirements for the WRF1209S-1WR2 in commercial ITE applications?
The 3 kV isolation helps mitigate conducted emissions and common-mode noise transfer between input and output stages, contributing to easier EMC pass testing under standards like CISPR 32 for multimedia devices. By breaking ground loops and suppressing differential-to-common-mode conversion, the module reduces susceptibility to radiated interference and improves immunity to fast transient bursts. However, isolation alone does not eliminate all EMI issues—adequate PCB layout, input/output filtering, and proper grounding practices remain essential. In practice, the WRF1209S-1WR2 often serves as a foundational building block that simplifies compliance by isolating noisy digital loads from sensitive analog peripherals.
How does the power density of the WRF1209S-1WR2 compare to larger 5W or 10W isolated modules, and what trade-offs exist when scaling down for compact designs?
At 1W output in a volume of ~25 cm³, the WRF1209S-1WR2 achieves a power density of approximately 0.04 W/cm³, which is lower than larger modules offering 5W or more (often >0.2 W/cm³). This reflects the inherent overhead of isolation transformers and shielding in compact formats. While smaller than bulkier alternatives, its SIP form factor enables dense stacking on PCBs where height permits. The trade-off is reduced thermal margin and limited headroom for future upgrades. For ultra-compact designs, designers might accept lower efficiency or integrate the module behind a heatsink, whereas larger systems benefit from better heat spreading and higher reliability margins.
Can the WRF1209S-1WR2 be used in solar-powered IoT nodes where input voltage varies widely between morning and afternoon charging cycles?
Provided the input voltage remains within the 9V to 18V window, the WRF1209S-1WR2 can function effectively in solar-powered nodes. However, during low-light conditions when panel output dips below 9V, the converter will shut down unless supplemented with a boost pre-regulator or supercapacitor buffer. Additionally, partial shading causing rapid input fluctuations may stress the control loop, leading to instability. To mitigate this, engineers should include hysteresis or MPPT logic upstream and ensure adequate input capacitance to smooth transients. The module’s wide operating temperature range supports outdoor deployment, but enclosure sealing and UV resistance become secondary concerns beyond electrical performance.
What considerations apply when replacing the WRF1209S-1WR2 with a functionally similar part from a competitor, assuming identical input/output specifications?
Substitution requires verification of isolation voltage, efficiency, thermal derating curves, pinout compatibility, and regulatory approvals. For example, swapping with a RECOM RNF-1209S may seem viable, but differences in start-up behavior, remote control implementation, or case material can alter board-level reliability. The WRF1209S-1WR2’s tube packaging implies it may lack moisture protection during storage, so shelf life assumptions differ from reel-packaged parts. Always conduct environmental stress testing (temperature cycling, vibration, humidity) and validate EMC performance post-substitution to avoid latent failures in field-deployed systems.

Parts with Similar Specifications

The three parts on the right have similar specifications to Mornsun America, LLC WRF1209S-1WR2

Product Attribute WRF1205S-1WR2 WRF1209S-3WR2 WRF1203S-1WR2 WRF1215S-1WR2
Part Number WRF1205S-1WR2 WRF1209S-3WR2 WRF1203S-1WR2 WRF1215S-1WR2
Manufacturer Mornsun America, LLC Mornsun America, LLC Mornsun America, LLC Mornsun America, LLC
Voltage - Output 2 - - - -
Type - - - -
Efficiency - - - -
Current - Output (Max) - - - -
Voltage - Isolation - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Output 4 - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Output 3 - - - -
Standard Number - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Size / Dimension - - - -
Number of Outputs - - - -
Voltage - Input (Min) - - - -
Voltage - Output 1 - - - -
Features - - - Simultaneous Sampling
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Input (Max) - - - -
Approval Agency - - - -
Power (Watts) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Control Features - - - -
Applications - - - -

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
WRF1209S-1WR2 Image

WRF1209S-1WR2

Mornsun America, LLC
98D-WRF1209S-1WR2

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB