kW-Class Fuel Cell DC/DC Converter – SiC Technology

SiC‑based high‑frequency isolated DC/DC topology. Liquid‑cooled, compact modular design with excellent power density. Systems can be paralleled via CAN bus for higher output power. Suitable for fuel cell vehicles (passenger cars, buses, trucks) and stationary fuel cell power generation. Delivers high efficiency (≥97%), high reliability, low switching losses, and fast dynamic response. Stable operation, easy vehicle integration, and strong automotive‑grade durability.

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kW-Class Fuel Cell DC/DC Converter – SiC Technology
Performance characteristics
SiC high‑frequency switching
Enables higher efficiency and power density compared to conventional Si IGBTs, significantly reducing cooling requirements and system weight.
Wide input voltage adaptability
Supports 150–550Vdc input range (customizable 50–1000Vdc), covering most fuel cell stack outputs from passenger cars to heavy trucks.
Modular parallel expansion
Multiple units can be paralleled via CAN bus, scaling power from 80kW to multi‑MW – ideal for high‑power commercial vehicles or stationary plants.
Automotive‑grade protection
Built‑in undervoltage, overvoltage, overcurrent, overtemperature, output short‑circuit, and communication fault protection. Compliant with GBT24347, EN 62477, ECE‑R10.
Overall efficiency ≥97%
Minimizes energy loss, extending fuel cell system range and reducing thermal management burden – especially critical for onboard applications.
Fast load response (<10ms)
Instantaneous dynamic response to fuel cell load changes ensures a stable high‑voltage DC bus, protecting both stack and downstream inverter.
Product Overview
kW-Class Fuel Cell DC/DC Converter – SiC Technology
kW-Class Fuel Cell DC/DC Converter – SiC Technology
 

Input Parameter

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX

   Input Voltage Range

150-550Vdc*

150-550Vdc*

150-550Vdc*

  Maximum Input Current

280A

560A

840A
 

Output Parameter

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX

  Output Voltage Range

600-950Vdc*

600-950Vdc*

600-950Vdc*

   Rated Input Power

80kW

160kW

240kW

   Rated efficiency

97%

97%

97%
 

Auxiliary Power Parameters

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX

    Power Supply Voltage Range

18～36VDC

    Auxiliary power consumption

≤50W
 

Protective Function

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX
Protective Function Undervoltage protection; Overvoltage protection; Overcurrent protection; Communication fault protection; Overtemperature protection; Output short-circuit protection
 

Environmental Adaptability

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX

     Protection Level

IP67

    Operating Temperature Range

-40～65℃

    Altitude

4000m

    Cooling Method

liquid cooling

    Communication Method

CAN2.0B

    Reference Standards

GBT24347-2021, EN 62477,  ECE-R10, EN 50121，GB/T 18488

 GB/T 18384, QC/T 413, QC/T 895,GB/T 18655, GB/T 17619
 

Dimensions and Weight

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX

   Dimensions (W×D×H mm)

410×360×125

410×560×125

410×740×125

   Reference Weight

25±0.5kg

45±0.5kg

65±0.5kg
 
 

Optional Functions

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX
Optional Functions EIS (Electrochemical Impedance Spectroscopy)；ISO (Insulation Monitoring)； Input pre-charging circuit；Stack discharge；PDU (Power Distribution Unit)；Direct copper busbar connection
 

Customization Instructions

   Term

DIS80-XXX

DIS160-XXX

DIS240-XXX
Customization Instructions Note: * Represents typical voltage. We can provide customized design services with input voltage ranging from 50 - 1000Vdc and output voltage ranging from 400 - 1500Vdc according to customers' stack voltage, output bus voltage and other parameters.
 
kW-Class Fuel Cell DC/DC Converter – SiC Technology

SiC‑based isolated DC/DC converter for fuel cell applications. Efficiency ≥97%, <10ms response, 150–550V input to 600–950V output, liquid cooling, IP67. Modular from 80kW to 240kW per unit, scalable to MW via parallel. CAN2.0B communication, automotive‑grade. Fully customizable.

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Perhaps you would like to know more?
What is a SiC‑based fuel cell DC/DC converter, and where is it used?
A

A SiC‑based DC/DC converter uses silicon carbide power semiconductors to efficiently boost the low‑voltage, unregulated output from a fuel cell stack to a stable, high‑voltage DC bus. It is primarily used in fuel cell vehicles (passenger cars, buses, trucks) and stationary fuel cell power generation systems. SiC technology enables higher switching frequencies, lower losses, and better thermal performance compared to traditional IGBTs.

What input and output voltage ranges does this converter support?
A

Standard input range: 150–550Vdc (fuel cell stack output). Standard output range: 600–950Vdc (HV bus for traction motor or grid inverter). Both are fully customizable: input from 50–1000Vdc and output from 400–1500Vdc based on your stack and system requirements.

Can multiple units be paralleled for higher power?
A

Yes. Multiple units can be paralleled via CAN2.0B communication using a master‑less current‑sharing algorithm. For example, three DIS80 units can provide 240kW, while four DIS240 units deliver 960kW. This modular approach allows you to scale from 80kW to multi‑MW for heavy‑duty trucks, buses, or stationary power plants.

What is the efficiency and dynamic response of the converter?
A

Rated efficiency is ≥97% across typical operating points. Thanks to SiC fast switching, the load response time is <10ms (0% to 100% load step), ensuring a stable high‑voltage bus during sudden power demands – critical for vehicle acceleration or grid load changes.

What environmental and automotive standards does it meet?
A

The converter is designed for under‑hood or chassis‑mount applications with IP67 protection (dust‑tight and waterproof). It operates from -40℃ to +65℃ and at altitudes up to 4000m. It complies with key standards: GBT24347‑2021 (China fuel cell DC/DC), EN 62477 (safety), ECE‑R10 (EMC), EN 50121 (railway), GB/T 18488 (EV motor controller), QC/T 413, QC/T 895, GB/T 18655, and GB/T 17619.

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