L089388 Ferraz Shawmut - Fuse

L089388 Description

The Mersen L089388 is a DC high speed fuse, rated for 750 V and 400 A. It protects power semiconductors such as diodes, thyristors and IGBTs from short-circuit damage in drives, rectifiers and UPS systems.

We help engineers and repair technicians find parts like the L089388, including obsolete ones. Send a quick RFQ for current pricing and delivery. Before ordering, please confirm ratings and pin-out with the official datasheet.

Summary of Features

Target Applications

Ferraz Shawmut L089388 is used for DC protection of inverters, motor drives, UPS systems, railway traction power and auxiliary circuits and similar equipment of 750 VDC or less.

Key Specifications

Mersen (Ferraz Shawmut) L089388 is a Protistor size 122 gR square body high speed fuse for DC protection, 400 A, 750 VDC (IEC), blade contacts (EF), with striker (catalog number D122GC75V400EF). Source: Mersen Protistor size 122 gR 750 VDC datasheet (DS-PFSA12GD2-06-1224-EN).

Parameter	Value
Catalog number	D122GC75V400EF
Item number	L089388
Rated voltage	750 VDC (IEC 60269-4)
Rated current	400 A
Characteristic	gR, size 122
Terminals	blade contacts (EF)
Breaking capacity	100 kA DC
Pre-arcing I²t	50.94 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 50 In	600 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 10 In	3100 kA²s
Power dissipation at In / 0.8 In	74.5 W / 40.5 W
Indication	Striker; microswitch options MC 3E, MCR 3E, MC2R 3E
Weight	1.3 kg

Technical document (PDF)  |  Request a quote for L089388 (reply within 24 hours)