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 ConvertersVI-J51-CX
VI-J51-CX Image
VI-J51-CX Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

VI-J51-CX - Vicor Corporation

Manufacturer Part Number
VI-J51-CX
Manufacturer
Vicor
Allelco Part Number
32D-VI-J51-CX
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
38,940 pcs available, New & Original
Parts Description
DC DC CONVERTER 12V 75W
Package
Half Brick
Data sheet
VI-J51-CX.pdf

Environmental Information

Vicor REACH.pdf
RoHs Status
 
Compare
Our certification
In stock: 38940

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

VI-J51-CX Tech Specifications
Vicor Corporation - VI-J51-CX technical specifications, attributes, parameters and parts with similar specifications to Vicor Corporation - VI-J51-CX

Product Attribute Attribute Value
Manufacturer Vicor
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 12V
Voltage - Isolation 3 kV
Voltage - Input (Min) 100V
Voltage - Input (Max) 200V
Type Isolated Module
Size / Dimension 2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
Series VI-J00™ (75W)
Power (Watts) 75 W
Product Attribute Attribute Value
Package / Case Half Brick
Package Bulk
Operating Temperature -25°C ~ 100°C
Number of Outputs 1
Mounting Type Through Hole
Features OCP, SCP
Efficiency 90%
Current - Output (Max) 6.25A
Base Product Number VI-J51
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) Not Applicable
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.40.9580

Frequently Asked Questions(FAQ)

How does the VI-J51-CX compare to other 75W isolated DC-DC converters in terms of input voltage range and isolation voltage when designing a high-reliability industrial power supply?
The VI-J51-CX supports an input voltage range from 100V to 200V, which is suitable for applications requiring stable operation across variable high-voltage sources. Its 3 kV isolation voltage provides robust protection against electrical noise and fault conditions in harsh environments. When compared to similar-rated modules, this wide input range reduces the need for additional pre-regulation stages, while the high isolation enhances safety margins in ITE and commercial systems where transient immunity is critical.
What are the key trade-offs between using the VI-J51-CX and a non-isolated buck converter for a 12V output at 6.25A in a space-constrained design?
The VI-J51-CX offers full galvanic isolation, which eliminates ground loops and improves EMI performance but requires more board real estate due to its half-brick footprint and through-hole mounting. A non-isolated buck converter would be smaller and potentially more efficient at lower input-to-output differentials, but lacks built-in isolation and overcurrent or short-circuit protection unless externally implemented. For designs where safety compliance, noise sensitivity, or system grounding flexibility are priorities, the VI-J51-CX justifies its size through enhanced reliability and regulatory alignment.
Can the VI-J51-CX operate reliably under extended temperature cycling between -25°C and 100°C, and what thermal management considerations apply?
Yes, the VI-J51-CX is rated for operation from -25°C to 100°C, making it suitable for automotive edge cases or industrial enclosures with poor thermal buffering. However, derating may be necessary near the upper limit—especially if ambient airflow is limited. With a maximum output current of 6.25A and 90% efficiency, the module generates approximately 8.3W of heat under full load. This necessitates adequate heatsinking or airflow to prevent sustained junction temperatures beyond safe operating limits, particularly in sealed enclosures.
Why might an engineer choose the VI-J51-CX over alternative solutions despite its RoHS non-compliance status?
While RoHS non-compliance can complicate supply chain integration in regulated markets, the VI-J51-CX delivers consistent performance in high-voltage, high-power-density applications where few alternatives match its combination of 75W output, 100–200V input support, and proven isolation. In legacy or specialized industrial systems where lead-based solder or certain alloys are still permitted under specific exemptions, the component’s robustness, long-term availability, and compatibility with existing PCB assembly processes make it a pragmatic choice despite certification limitations.
How does the VI-J51-CX handle overcurrent and short-circuit events, and what level of protection does it offer for downstream loads?
The VI-J51-CX includes built-in Overcurrent Protection (OCP) and Short-Circuit Protection (SCP), which automatically limit output current and disable conduction during fault conditions without damaging the module. Upon removal of the fault, the converter typically auto-recovers, enhancing system resilience. This intrinsic protection reduces reliance on external fuses or current-limiting circuits, simplifying fault handling in mission-critical applications such as telecommunications infrastructure or medical equipment where continuous uptime is essential.
What is the significance of the VI-J51-CX’s 90% efficiency figure, and how does it affect system-level power budgeting?
A peak efficiency of 90% means that for every 75W delivered to the load, about 8.3W is dissipated as heat, requiring thermal management. While not the highest among modern switchers, this efficiency is sufficient for many commercial applications and reflects a balance between switching losses, magnetic component size, and control loop optimization. Engineers should account for this dissipation when sizing fans, selecting heatsinks, or planning enclosure ventilation to maintain long-term reliability.
In what scenarios would the VI-J51-CX’s 3 kV isolation voltage provide tangible benefits over lower-isolation alternatives?
The 3 kV isolation rating ensures safe separation between primary and secondary sides, crucial in systems exposed to high common-mode transients such as motor drives, power distribution units, or telecom line cards. It also simplifies safety certifications by meeting reinforced insulation requirements in ITE equipment. Compared to modules offering only 1.5 kV isolation, the VI-J51-CX enables higher-risk environment deployments without requiring additional optocouplers or isolation barriers, reducing BOM complexity and failure points.
How does the VI-J51-CX’s package size influence mechanical layout decisions in a multi-module power architecture?
Measuring 57.9mm x 70.0mm x 12.7mm in a half-brick form factor, the VI-J51-CX occupies significant PCB area but allows direct through-hole mounting for strong mechanical attachment. In distributed power systems, this footprint may limit density but facilitates better thermal spreading and easier serviceability. Layout engineers must ensure adequate clearance around all four sides for airflow and avoid placing sensitive analog traces near switching nodes to mitigate conducted emissions from this high-frequency converter.
What are the implications of the VI-J51-CX being labeled “RoHS non-compliant” for global market deployment?
Although the VI-J51-CX meets functional and environmental performance standards, its RoHS non-compliance restricts use in regions enforcing strict hazardous substance bans, such as the European Union under Directive 2011/65/EU. Designers considering this part must verify whether any applicable exemptions cover lead content or use alternative components for new projects targeting CE marking or similar certifications. Legacy designs in non-regulated sectors may continue to deploy it with appropriate risk documentation.
How does the VI-J51-CX’s input voltage window compare to typical rectified AC mains voltages, and what filtering is recommended?
The 100–200V input range aligns well with rectified single-phase AC mains (e.g., 120VAC → ~170VDC or 220VAC → ~310VDC), but falls short of full-wave rectified three-phase inputs above 200V. Therefore, in three-phase applications, a front-end step-down stage is needed before the VI-J51-CX. Input capacitors should be sized to dampen ripple and transient dips, with bulk capacitance chosen based on hold-up time requirements during brief AC drops, ensuring stable operation across the entire input swing.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vicor Corporation VI-J51-CX

Product Attribute VI-J51-CX-S VI-J51-CX-F1 VI-J51-CX-F2 VI-J51-CX-F3
Part Number VI-J51-CX-S VI-J51-CX-F1 VI-J51-CX-F2 VI-J51-CX-F3
Manufacturer Vicor Corporation Vicor Corporation Vicor Corporation Vicor Corporation
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Input (Min) - - - -
Series - - - -
Features - - - Simultaneous Sampling
Type - - - -
Voltage - Output 2 - - - -
Voltage - Output 3 - - - -
Voltage - Isolation - - - -
Voltage - Input (Max) - - - -
Efficiency - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Power (Watts) - - - -
Number of Outputs - - - -
Size / Dimension - - - -
Applications - - - -
Current - Output (Max) - - - -
Voltage - Output 1 - - - -

VI-J51-CX Datasheet PDF

Download VI-J51-CX pdf datasheets and Vicor Corporation documentation for VI-J51-CX - Vicor Corporation.

Datasheets
VI/VE-J00 MiniMod Family.pdf
Design Resources
VI-200, VI-J00 Design Guide, Appl Manual.pdf
Environmental Information
Vicor REACH.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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
VI-J51-CX Image

VI-J51-CX

Vicor Corporation
32D-VI-J51-CX

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