Coolant circulation through stack, radiator and heat-exchanger loop
Fuel Cell Cooling Circulation Pump
Seal-less canned motor · 900–4500 W · 165–600 L/min
Cooling circuit
Overview
A seal-less canned-motor coolant pump for fuel-cell cooling circuits. Nine models from 900 W to 4500 W, rated up to 600 L/min at 32 m head, with CAN 2.0B control, multi-protection and an insulated medium design compatible with fuel-cell coolant.
Key features
- Seal-less canned-motor design — zero leakage, no shaft seal to wear
- Brushless PM motor with optimised hydraulics
- CAN 2.0B real-time speed and fault feedback
- Dry-run, locked-rotor, over-temperature and over-current protection
- ≥ 15,000 h service life, low noise, IP67
- Insulated medium design — wetted parts electrically insulated
Specification
Technical data
Model selection
| Model | Rated power | Rated flow & head | Rated voltage | Max. flow | Max. head | Noise | Comm. | Protection |
|---|---|---|---|---|---|---|---|---|
| EPH900L-00 | 900 W | 165 L/min @ 15.2 m | 345 V DC | 210 L/min | 18.9 m | ≤ 60 dB(A) | CAN 2.0B | IP67 |
| EPH900H-35 | ≤ 900 W | 165 L/min @ 12.5 m | 410–750 V DC | 210 L/min | 18.9 m | ≤ 60 dB(A) | CAN 2.0B | IP67 |
| EPH1500H-00 | 1500 W | 210 L/min @ 22 m | 550 V DC | 330 L/min | 27 m | ≤ 68 dB(A) | CAN 2.0B | IP67 |
| EPH2500H-00 | 2500 W | 260 L/min @ 24 m | 550 V DC | 330 L/min | 30 m | ≤ 70 dB(A) | CAN 2.0B | IP67 |
| EPH2500H-D4 | 2500 W | 360 L/min @ 17 m | 800 V DC | 400 L/min | 30 m | ≤ 70 dB(A) | CAN 2.0B | IP67 |
| EPH2500H-95 | 2500 W | 260 L/min @ 24 m | 550 V DC | 330 L/min | 30 m | ≤ 70 dB(A) | CAN 2.0B | IP67 |
| EPH2500H-C3 | 2500 W | Custom | Custom | Custom | Custom | ≤ 70 dB(A) | CAN 2.0B | IP67 |
| EPH4500H-00 | 4500 W | 600 L/min @ 24 m | 550 V DC | 660 L/min | 32 m | ≤ 72 dB(A) | CAN 2.0B | IP67 |
| EPH4500H-56 | 4500 W | Customized | 410–750 V DC | Customized | Customized | ≤ 72 dB(A) | CAN 2.0B | IP67 |
EPH2500H-C3 and EPH4500H-56 offer customisable flow, head and voltage options. Select on the rated flow and head at the operating point, not on maximum values. Noise measured at 1 m.
Application
Where it is used
900 W and 1500 W models — passenger and light-commercial stacks
2500 W and 4500 W models — heavy-duty vehicles and stationary systems
Fits glycol- and water-based coolant loops without modification
Related reading
From the engineering notes
Background on the design decisions behind this component — all articles.
Cooling architecture and the insulation question
Why the coolant loop and the electrical barrier must be designed together, and which components keep them apart.
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.
Fuel Cell Cooling Circulation Pump — product brochure (PDF)
Full specifications, model selection tables and engineering notes. Two pages, English.
Download PDF
Tell us what you are building
Send us your power rating, input/output voltage and application. We reply with a model recommendation and lead time.