A30QS125-4 Ferraz Shawmut - Fuse

A30QS125-4 Description

Mersen A30QS125-4 is a high speed fuse rated at 300 V and 125 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 A30QS125-4 is used for protection of power semiconductors (diodes, phase control SCRs and other devices) in heavy duty rectifiers, power supplies and DC equipment of 300 V or less.

Key Specifications

Mersen (Ferraz Shawmut) A30QS125-4 is an Amp-Trap Form 101 A30QS high speed fuse, 125 A, 300 VAC/DC, blade, bolt-in mounting. Source: Mersen A30QS Amp-Trap Form 101 high speed fuses datasheet (HS 10-11).

Parameter	Value
Series	A30QS Amp-Trap Form 101 high speed fuse
Rated current	125 A
Rated voltage	300 VAC / 300 VDC
Interrupting rating	200 kA AC / 100 kA DC (L/R 10 ms)
Mounting type	4: blade, bolt-in
Characteristics	Fast acting, current limiting, low I²t, controlled arc voltage, superior DC capability
Approvals	UL Recognized Component (file E60314), AC: guide JFHR2
Main dimensions (see datasheet figure)	A 3.13 in (80 mm), B 1.22 in (31 mm)
Mounting hole centres (D)	2.44 in (62 mm)

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