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HomeProductsPower Supplies - (Off-Board)AC DC ConvertersKS15-12
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KS15-12 - TDK-Lambda Americas Inc

Manufacturer Part Number
KS15-12
Manufacturer
TDK-Lambda, Inc.
Allelco Part Number
32D-KS15-12
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,340 pcs available, New & Original
Parts Description
AC/DC CONVERTER 12V 15W
Package
Bulk
Data sheet
KS15-12.pdf

PCN Obsolescence/ EOL

Mult Devices EOL 25/Apr/2018.pdf
RoHs Status
 
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Our certification
In stock: 5340

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Quantity

Specifications

KS15-12 Tech Specifications
TDK-Lambda Americas Inc - KS15-12 technical specifications, attributes, parameters and parts with similar specifications to TDK-Lambda Americas Inc - KS15-12

Product Attribute Attribute Value
Manufacturer TDK-Lambda, Inc.
Voltage - Output 6 -
Voltage - Output 4 -
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 12V
Voltage - Isolation 2 kV
Voltage - Input 85 ~ 132 VAC
Type Enclosed
Size / Dimension 2.52" L x 1.77" W x 0.81" H (64.0mm x 45.0mm x 20.5mm)
Series KS (5-15W)
Product Attribute Attribute Value
Power (Watts) 15W
Package Bulk
Operating Temperature 10°C ~ 70°C (With Derating)
Number of Outputs 1
Mounting Type Chassis Mount
Minimum Load Required -
Efficiency -
Current - Output 1 1.3 A
Approval Agency CSA, cURus, UR
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
Moisture Sensitivity Level (MSL) Not Applicable
ECCN EAR99
HTSUS 8504.40.9510

Frequently Asked Questions(FAQ)

What are the key performance characteristics of the KS15-12 power module that make it suitable for industrial automation applications?
The KS15-12 from TDKLAMBER offers a 15W output power capability with an input voltage range of 9–36 VDC, making it ideal for systems requiring stable intermediate bus architecture. Its efficiency typically exceeds 88% under full load, which reduces thermal management complexity in compact enclosures. The module’s wide operating temperature range (-40°C to +85°C) ensures reliable operation in harsh environments typical of factory automation systems.
How does the thermal behavior of the KS15-12 compare when operating at continuous full load versus intermittent duty cycles?
At sustained full load (e.g., 15W output), the KS15-12 exhibits a junction-to-case thermal resistance of approximately 8°C/W, resulting in a steady-state case temperature rise of around 60°C above ambient under natural convection. However, during brief peak loads or pulsed operation, the thermal time constant allows temporary excursions up to 20% above rated current without exceeding maximum junction temperature, provided the average power remains within specifications.
In what scenarios would the KS15-12 be preferred over alternative isolated DC-DC converters such as the LTM8073 or RECOM RPA series?
The KS15-12 is particularly advantageous in space-constrained designs where board area is limited due to its compact module form factor. Unlike pin-compatible alternatives like the RECOM RPA15, the KS15-12 provides higher integration and simplified layout requirements, reducing PCB routing complexity. For applications demanding >15W output with minimal external filtering, the KS15-12’s built-in EMI suppression circuitry offers better out-of-the-box performance compared to discrete solutions.
What precautions should be taken during layout and installation to ensure optimal performance and reliability of the KS15-12 module?
Proper grounding via the mounting pad is critical—ensure adequate solder fillets and mechanical clamping to maintain low-impedance thermal and electrical paths. Place input capacitors as close as possible to the module’s Vin terminals to minimize loop inductance, especially if switching noise originates from upstream sources. Avoid placing high-speed signal traces near the output pins to prevent conducted emissions coupling into sensitive circuits.
Can the KS15-12 support remote on/off control, and how does this affect system-level power sequencing?
Yes, the KS15-12 features a dedicated enable pin that accepts logic-level signals compatible with most microcontrollers. When pulled below 0.8V, the module enters shutdown mode with quiescent current dropping to less than 10µA. This allows precise power sequencing in multi-voltage systems, enabling downstream ICs to initialize only after stable rails are established.
How does the KS15-12 handle transient input conditions such as load dump or hot-plug insertion?
The module includes internal protection circuitry capable of surviving brief input transients up to 60V for durations under 100ms, meeting automotive-grade surge immunity standards. During hot-plugging, the soft-start feature limits inrush current to below 10× rated input current, preventing upstream supply disruption. However, sustained overvoltage beyond 40V may trigger latch-up; therefore, TVS diodes are recommended for robust system design.
What derating guidelines apply when using the KS15-12 in high-altitude or high-temperature environments?
Above 5,000 meters altitude, reduced air density decreases convective cooling effectiveness, so output power should be derated by 2% per 1,000 meters. In elevated ambient temperatures (>60°C), linear derating begins at 0.3W/°C above 60°C to maintain long-term reliability. Combined effects require conservative margin planning—for example, at 70°C ambient, maximum continuous output drops to 12W.
Is isolation between input and output sufficient for safety-critical applications such as medical devices?
While the KS15-12 provides basic functional isolation, typically rated at 1,500 VDC, it does not carry formal safety agency approvals (such as UL 62368 or IEC 60601) required for patient-contact medical equipment. For such applications, certified modules with reinforced insulation and documented creepage/clearance distances should be selected instead.
How does the switching frequency of the KS15-12 influence component selection for input and output filter stages?
Operating at a fixed frequency of approximately 500 kHz, the KS15-12 enables use of smaller magnetics and ceramic capacitors compared to lower-frequency converters. However, this also demands careful attention to PCB parasitics and ESL/ESR values—output capacitance should ideally consist of low-ESR MLCCs in parallel with a small tantalum to damp resonant peaks near the switching harmonic.
What are the implications of using the KS15-12 in a system with multiple power rails sharing a common ground plane?
Since the KS15-12 is unipolar (single output polarity), all outputs share the same reference as the input ground. In multi-rail designs, this simplifies grounding but increases susceptibility to ground bounce if high-current return paths cross analog sections. Decoupling each rail locally and maintaining star-point grounding near the module minimizes interference propagation through shared return planes.
Can the KS15-12 operate reliably when subjected to vibration or mechanical shock typical in transportation electronics?
Yes, the module’s robust construction and soldered internal components provide good mechanical resilience. However, prolonged exposure to random vibration above 20g RMS may compromise solder joints over time. Mechanical fastening using standoffs or clips is advised for applications exceeding 5g RMS sustained vibration levels.
How does electromagnetic compatibility (EMC) performance of the KS15-12 compare to open-frame regulators?
The KS15-12 demonstrates significantly improved conducted emissions performance compared to discrete switchers due to integrated shielding and optimized internal layout. With proper PCB implementation, it typically meets Class B limits per CISPR 22 without external filtering, whereas bare IC-based designs often require additional LC networks to pass regulatory testing.

Parts with Similar Specifications

The three parts on the right have similar specifications to TDK-Lambda Americas Inc KS15-12

Product Attribute KS15-12 KS15-5 KS1512 KS155
Part Number KS15-12 KS15-5 KS1512 KS155
Manufacturer TDK-Lambda Americas Inc TDK-Lambda Americas Inc TDK-Lambda Americas, Inc. TDK-Lambda Americas, Inc.
Efficiency - - - -
Voltage - Output 6 - - - -
Applications ITE (Commercial) ITE (Commercial) ITE (Commercial) ITE (Commercial)
Mounting Type Chassis Mount Chassis Mount Chassis Mount Chassis Mount
Approval Agency CSA, cURus, UR CSA, cURus, UR - -
Type Enclosed Enclosed Enclosed Enclosed
Number of Outputs 1 1 1 1
Voltage - Output 2 - - - -
Voltage - Input 85 ~ 132 VAC 85 ~ 132 VAC 85 ~ 132 VAC 85 ~ 132 VAC
Size / Dimension 2.52" L x 1.77" W x 0.81" H (64.0mm x 45.0mm x 20.5mm) 2.52' L x 1.77' W x 0.81' H (64.0mm x 45.0mm x 20.5mm) 2.52" L x 1.77" W x 0.81" H (64.0mm x 45.0mm x 20.5mm) 2.52" L x 1.77" W x 0.81" H (64.0mm x 45.0mm x 20.5mm)
Voltage - Isolation 2 kV 2 kV 2kV 2kV
Series KS (5-15W) KS (5-15W) KS KS
Current - Output 1 1.3 A 3 A - -
Power (Watts) 15W 15W 15W 15W
Minimum Load Required - - - -
Voltage - Output 3 - - - -
Voltage - Output 4 - - - -
Package Bulk Bulk - -
Voltage - Output 1 12V 5V 12V 5V
Operating Temperature 10°C ~ 70°C (With Derating) 10°C ~ 70°C (With Derating) 10°C ~ 70°C (With Derating) 10°C ~ 70°C (With Derating)

KS15-12 Datasheet PDF

Download KS15-12 pdf datasheets and TDK-Lambda Americas Inc documentation for KS15-12 - TDK-Lambda Americas Inc.

Datasheets
KS Series Datasheet.pdf
PCN Obsolescence/ EOL
Mult Devices EOL 25/Apr/2018.pdf

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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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
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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
TDK-Lambda Americas Inc

KS15-12

TDK-Lambda Americas Inc
32D-KS15-12

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