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Electric vehicle power distribution unit fuse selection guide

Time:2021-09-09   Author:Bussmann fuse product manager   Browse:

DC fuse in electric vehicle power distribution unit

Power distributor unit designed for EV, known as "electric vehicle high voltage power distribution box", "Electric vehicle power unit" and "Electric vehicle safety box", is an important part in EV.

It supports function converting and power distribution to every systematic unit. Such as motor control unit, battery management system, charging system, DC to DC system, air condition system, electric steering auxiliary system and brake system. 

PDU can also provide short circuit protection, current leaking protection and IP protection. Battery lifespan is longer and maintenance cost of EV is reduced with this unit (Easy maintenance, convenient installation, space saving and reliable electric connection).


Where fuse is used in Electric Vehicle Power Distribution Unit?

1, Main circuit fuse protection

2, Air conditioning circuit fuse protection

3, Auxiliary power branch fuse protection

4, Oil Pump Branch fuse protection

5, Air Pump Branch fuse protection

6, Insulation testing

7, Current Hall signal acquisition

8, Contactor control

Which fuse is used in PDU?

In 1000VDC System

EVK10-(15, 20, 25, 30)-T, EVK14-(35, 40, 50)-T, EVK22-(60, 70, 80)-T is used in the auxiliary, air conditioning, insulation testing etc circuit.

For main circuit protection,following big current fuses are used.

EVK25-(70, 80, 90, 100);

EVK30-(125, 150, 175, 200);

EVK40-(225, 250, 275, 300)

EVK50-(350, 400)

EVK60-(450, 500, 550, 600)


If you are designing 500VDC system

For Auciliary circuit protection, these 500VDC fuses are suitable:

EV10-(amp) ferrule

EV10-(amp)-B axial bolt-on

EV10-(amp)-T flush bolt-on

EV10-(amp)-1P PCB terminal

500VDC fuses.png

For main circuit, you should select below DC fuses:

500VDC: FWH-100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 400....800C(B);

700VDC:  FWP-35, 100, 150, 200....600C(A);

800VDC: FWJ-150, 400A;

Pls consult Bussmann Power if there is detail fuse testing report needed.

New industry Technology regarding to Bussmann fuse, ABB breakers, Amphenol connectors, HPS transformers, etc. 

TAG:   500VDC fuse 1000VDC fuse electric vehicle power distribution unit