A50P100-4TI Ferraz Shawmut - Fuse

A50P100-4TI Description

The Mersen A50P100-4TI is a high speed fuse, rated for 500 V and 100 A. Its job is to clear faults fast enough to save expensive semiconductors in drives, UPS units and DC supplies.

We help engineers and repair technicians find parts like the A50P100-4TI, including obsolete ones. Send a quick RFQ for current pricing and delivery. Before ordering, please confirm ratings and pin-out with the official datasheet.

Summary of Features

Target Applications

Ferraz Shawmut A50P100-4TI 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) A50P100-4TI is an Amp-Trap Form 101 A50P high speed fuse, 100 A, 500 VAC / 450 VDC, blade, bolt-in mounting, with integral trigger indicator (TI). 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	100 A
Rated voltage	500 VAC / 450 VDC
Interrupting rating	100 kA AC / 79 kA DC (L/R 10 ms)
Mounting type	4: blade, bolt-in
Indicator	integral trigger indicator (TI)
Characteristics	Very fast acting, current limiting, low I²t, controlled arc voltage
Approvals	UL Recognized Component (JFHR2, file 60314): AC and DC
Overall length (A)	3.63 in (92.2 mm)
Body diameter / width (B)	1.00 in (25.4 mm)
Mounting hole centres (D)	74.7 mm
Matching fuse block	P243E

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