A50P1400-4 Ferraz Shawmut - Fuse

A50P1400-4 Description

A50P1400-4 is a 500 V, 1400 A high speed fuse made by Mersen. 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 A50P1400-4 is used for protection of DC drives, uninterruptible power supplies (UPS) and other power electronic equipment of 500 V or less, including power semiconductor (diode, thyristor, IGBT) protection.

Key Specifications

Mersen (Ferraz Shawmut) A50P1400-4 is an Amp-Trap Form 101 A50P high speed fuse, 1400 A, 500 V class, blade, bolt-in mounting. Source: Mersen A50P Amp-Trap Form 101 datasheet (HS 14-15, 2025).

Parameter	Value
Series	A50P Amp-Trap Form 101 high speed fuse
Rated current	1400 A
Rated voltage	Consult Mersen (above the 10-1200 A rating range of the datasheet)
Interrupting rating	Consult Mersen
Mounting type	4: blade, bolt-in
Characteristics	Very fast acting, current limiting, low I²t, controlled arc voltage
Approvals	Not listed as UL recognized in the datasheet range (AC/DC UL: up to 800 A)
Overall length (A)	10.22 in (259.6 mm)
Body diameter / width (B)	4.38 in (111.1 mm)
Mounting hole centres (D)	221.5 mm

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