R220953 Ferraz Shawmut - Fuse

R220953 Description

The Mersen R220953 is a DC high speed fuse, rated for 750 V and 450 A. Fast-acting fuses like this are used to protect rectifiers, inverters and other power-electronic circuits against short circuits.

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Summary of Features

Target Applications

Ferraz Shawmut R220953 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) R220953 is a Protistor size 122 gR square body high speed fuse for DC protection, 450 A, 750 VDC (IEC), M10 threaded terminals (TTF), with striker (catalog number D122GD75V450TF). Source: Mersen Protistor size 122 gR 750 VDC datasheet (DS-PFSA12GD2-06-1224-EN).

Parameter	Value
Catalog number	D122GD75V450TF
Item number	R220953
Rated voltage	750 VDC (IEC 60269-4)
Rated current	450 A
Characteristic	gR, size 122
Terminals	M10 threaded terminals (TTF)
Breaking capacity	100 kA DC
Pre-arcing I²t	63.5 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 50 In	800 kA²s
Max. I²t at 900 V, L/R = 40 ms, Ip = 10 In	4000 kA²s
Power dissipation at In / 0.8 In	90 W / 49 W
Indication	Striker; microswitch options MC 3E, MCR 3E, MC2R 3E
Weight	1.43 kg

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