Isolated DC/DC eradicates cooling-system insulation hazards in fuel cell systems
DIS Isolated DC/DC Converter
100 / 200 / 300 kW · 150–550 Vdc in · 600–950 Vdc out
Power conversion — DC/DC
Overview
High-power isolated DC/DC converter with 3D liquid cooling. Power density exceeds 6 kW/L and peak efficiency reaches 98.5%. Wide input voltage range with integrated ZVS technology, which reduces switching loss and EMI. Complete overcurrent, overvoltage and overtemperature protection. Typical applications are fuel cell, energy storage and industrial power.
Key features
- Flexible adaptation — voltage windows sized to the stack, custom ranges on request
- Wide application — stationary power, rail, marine and road traffic
- Custom solutions — tailored to specific power and voltage requirements
- High safety — full input-output insulation, 3500 Vdc withstand
Specification
Technical data
Model comparison — DIS100 / DIS200 / DIS300
| Parameter | DIS100-XXX | DIS200-XXX | DIS300-XXX |
|---|---|---|---|
| Input voltage range | 150–550 Vdc* | 150–550 Vdc* | 150–550 Vdc* |
| Maximum input current | 360 A | 720 A | 900 A |
| Output voltage range | 600–950 Vdc* | 600–950 Vdc* | 600–950 Vdc* |
| Rated input power | 100 kW | 200 kW | 300 kW |
| Rated efficiency | 97% | 97% | 97% |
| Dimensions (W×D×H) | 410×360×125 mm | 410×650×125 mm | 410×840×125 mm |
| Reference weight | 25 ± 0.5 kg | 45 ± 0.5 kg | 65 ± 0.5 kg |
Shared specification — all DIS models
| Parameter | Specification |
|---|---|
| Auxiliary supply | 18–36 VDC, ≤ 80 W |
| Protection functions | Undervoltage, overvoltage, overcurrent, communication fault, overtemperature, output short-circuit |
| Protection level | IP67 |
| Operating temperature | −40…+65 °C |
| Altitude | 2000 m |
| Cooling | Liquid cooling |
| Communication | CAN 2.0B |
| Reference standards | GB/T 24347-2021, EN 62477, ECE-R10, EN 50121, GB/T 18488, GB/T 18384, QC/T 413, QC/T 895, GB/T 18655, GB/T 17619 |
| Optional functions | EIS (electrochemical impedance spectroscopy), ISO (insulation monitoring), input pre-charge, stack discharge, PDU, direct copper busbar connection |
* Typical voltage. Customised designs are available with input 50–1000 Vdc and output 400–1500 Vdc according to the customer's stack voltage and output bus voltage.
Application
Where it is used
Stationary power generation, rail, marine and road traffic
More in dc/dc converters
Related reading
From the engineering notes
Background on the design decisions behind this component — all articles.
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.
Isolated DC-DC first, then the coolant piping
The 100 Ω/V and 500 Ω/V rules come from touch-safety limits, not from the converter. Worked numbers for a 500 V stack on an 800 V bus, and what they mean for hose length and rigid tube.
DIS Isolated DC/DC Converter — product brochure (PDF)
Full specifications, model selection tables and engineering notes. Two pages, English.
Download PDF
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