M085249 Ferraz Shawmut - Fuse

M085249 Description

Mersen makes the M085249, a 750 V, 315 A DC high speed fuse. Its job is to clear faults fast enough to save expensive semiconductors in drives, UPS units and DC supplies.

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Summary of Features

Target Applications

Ferraz Shawmut M085249 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) M085249 is a Protistor size 122 gR square body high speed fuse for DC protection, 315 A, 750 VDC (IEC), M10 threaded terminals (TTF), with striker (catalog number D122GC75V315TF). Source: Mersen Protistor size 122 gR 750 VDC datasheet (DS-PFSA12GD2-06-1224-EN).

Parameter	Value
Catalog number	D122GC75V315TF
Item number	M085249
Rated voltage	750 VDC (IEC 60269-4)
Rated current	315 A
Characteristic	gR, size 122
Terminals	M10 threaded terminals (TTF)
Breaking capacity	100 kA DC
Pre-arcing I²t	30.06 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 50 In	400 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 10 In	2000 kA²s
Power dissipation at In / 0.8 In	58 W / 31.5 W
Indication	Striker; microswitch options MC 3E, MCR 3E, MC2R 3E
Weight	1.43 kg

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