Isolated DC/DC
High-density soft-switching isolated converters that decouple the fuel cell stack from the downstream bus, with full input-output insulation and liquid cooling.
Core product
Hydrogen fuel cell components
DC/DC converters and balance-of-plant parts for fuel cell integrators
HY-PART sources the power electronics and BOP components that hydrogen fuel cell systems are built from — isolated and non-isolated DC/DC converters, air and cooling subsystems, hydrogen valves and electrical accessories. Engineering-led selection, fast samples, one point of accountability.
80–300 kW
Isolated converter range
98.5%
Peak efficiency
6 kW/L
Power density
IP67
Outdoor-rated option
DIS100-300-800
100 kW typical
- Rated power
- 100 kW
- Input voltage
- 150–500 Vdc
- Max input current
- 360 A
- Output voltage
- 600–950 Vdc
- Rated efficiency
- 97%
- Isolation withstand
- 4000 Vdc
- Protection
- IP67
- Operating temp.
- −40 to 65 °C
- Communication
- CAN 2.0B
- Cooling
- Liquid
Product range
Components we source and supply
Six product families covering the electrical, thermal, pneumatic and hydrogen-side subsystems of a fuel cell power system.
Low-power DC/DC
Non-isolated buck-boost modules developed for stationary fuel cell generation and forklift applications, in 2 kW to 8 kW bands.
Own brandAir system
Humidification and filtration parts that condition the cathode air stream — the module most often specified as a system.
DistributorCooling system
Integrated heat sinks, magnetic-drive pumps, deionizers and particulate filtration for closed-loop stack cooling.
DistributorHydrogen system
Valves, fittings and pipelines rated for hydrogen service, including ISO 22734-class components.
DistributorAccessories
High-voltage connectors, current sensors, discharge resistors and controllers that complete the electrical architecture.
Distributor
Why work with HY-PART
A component partner, not a catalogue
We are engineers who source. The part we recommend is the part that fits your electrical envelope, not the one that is easiest to ship.
Engineering-led selection
Power electronics engineers review your electrical envelope and recommend the right part, rather than passing your request along and hoping.
Integrated supply chain
We hold working relationships across the full component set, which means a system-level package can be sourced from one place with one point of accountability.
Speed to first sample
Catalogue models are selected quickly and dispatched as soon as the model is confirmed, so you can validate in the market while the design is still open.
Application experience
SiC semiconductor application experience informs converter design choices across fuel cell, storage and industrial power.
Applications
Where our components go
From 500 W UAV propulsion to 300 kW stationary generation. The application determines the electrical envelope, and the envelope determines the converter.
Stationary power generation
Continuous grid-parallel and off-grid generation for telecom sites, industrial parks and remote installations.
Typical 10 kW – 300 kWCommunication base stations
Backup and primary power for telecom base stations where diesel cost and emissions drive the fuel cell case.
Typical 3 kW – 30 kWUnmanned aerial vehicles
Aerial fuel cell propulsion where endurance, not just range, sets the mission radius.
Typical 500 W – 6 kWMaterial handling forklifts
Forklift drivetrains where rapid refuelling and long shift runtime justify the stack.
Typical 2 kW – 30 kWMobile backup power
Trailer-mounted and vehicle-integrated backup systems for emergency and disaster response.
Typical 5 kW – 50 kWRail and maritime
On-board and shore-side applications governed by EN 50121 rail and marine EMC requirements.
Project specified30+
Power bands covered
6
Component families
600 W–18 kW
Modular series range
EN 62477
Design standard
Providing high-quality parts for the hydrogen energy industry
Technical insights
Engineering notes from the field
Practical guidance on topology choice, system architecture and procurement — written for engineers specifying the system.
Isolated vs non-isolated DC/DC for fuel cell systems
The topology choice affects safety, cost and coolant insulation. Here is how to decide for your application.
6 min readCooling architecture and the insulation question
Why the coolant loop and the electrical barrier must be designed together, and which components keep them apart.
7 min readHow to write an RFQ that gets accurate quotations
Most delayed quotations are caused by an underspecified RFQ. Six fields that fix it.
5 min readTell us what you are building
Send us your power rating, input/output voltage and application. We reply with a model recommendation and lead time.
Common questions
Frequently asked
What is an isolated DC/DC converter in a fuel cell system?
A fuel cell stack outputs a variable DC voltage that drifts with load and state of charge. The DC/DC converter regulates it to a stable bus voltage for the downstream inverter or DC load. An isolated converter also electrically separates the low-voltage stack side from the high-voltage bus, which removes a common insulation failure path between the stack and the cooling loop.
Do you supply complete fuel cell systems or components?
Components. We source and supply power electronics and balance-of-plant parts — DC/DC converters, air system parts, cooling parts, hydrogen valves and fittings, connectors and sensors — for system integrators who build the system themselves.
What information do you need to recommend a model?
Four things: stack rated power, stack output voltage range, required downstream bus voltage, and your application. With those we can usually propose a model and a lead time in the first reply.
What is the lead time for samples and bulk orders?
Samples of standard catalogue models are typically dispatched once the model is confirmed. Non-standard or customized configurations take longer because they route to the factory. We confirm timing in writing before you commit.
Can you customize the converter for our stack?
Yes. Custom power and voltage configurations are part of our service. Tell us the electrical window your stack produces and what the downstream bus needs, and we will tell you whether it is a catalogue fit or a custom build.