K078278 Ferraz Shawmut - Fuse

K078278 Description

The K078278 from Mersen is a semiconductor fuse with a 1500 V / 550 A rating. 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 K078278 is used for protection of SCRs, diodes, thyristors, GTOs and IGBTs in rectifiers, inverters, DC drives, UPS systems, reduced voltage motor starters and other power conversion equipment up to 1500 VAC.

Key Specifications

Mersen (Ferraz Shawmut) K078278 is a Protistor PSC aR square body semiconductor fuse, size 92, 550 A, 1500 VAC, German blades DIN 140, D14A type (catalog number PC92UH15C550D4A). Source: Mersen (Ferraz Shawmut) Protistor PSC aR sizes 9x 1500 VAC square body fuses catalog (SCAC146-157).

Parameter	Value
Catalog number	PC92UH15C550D4A
Reference number	K078278
Designation	15 URH 92 D14A 0550
Rated voltage	1500 VAC (DC: consult Mersen)
Rated current	550 A
Characteristic	aR, size 92
Terminals	German blades DIN 140, D14A type
Breaking capacity	200 kA at 1500 V
Maximum I²t at 1500 V	1190 kA²s
Power losses at 0.8 In / In	61 W / 124 W
Trip indicator	Low voltage trip indicator; field-mountable microswitch MC 3E / MCR 3E / MC2R 3E (ordered separately)
Standard	Tested to IEC 60269-4 at Un +10%
Note	D14A types are made to order (marked * in the catalog)

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