170M3770 Bussmann - Fuse

170M3770 Description

Rated at 450 A, the Bussmann 170M3770 is a fuse. 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 170M3770, 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

Bussmann 170M3770 is used for protection of power semiconductors (diodes, thyristors and IGBT modules) in rectifiers, AC and DC drives, inverters, UPS systems, soft starters and other power conversion equipment.

Key Specifications

Bussmann 170M3770 is a high speed square body semiconductor fuse, US style (bolted tags), size 1*, 450 A, 690 V / 700 V IEC, -FKE/115 type K indicator for microswitch (115 mm version). Source: Bussmann Square Body US Style 690V/700V 40-2000A datasheet (BIF 720023). Values at 25°C unless noted.

Parameter	Value
Rated current	450 A RMS
Rated voltage	690 V / 700 V IEC
Body size	1*
Style	US style (bolted tags)
Indicator	-FKE/115 type K indicator for microswitch (115 mm version) - microswitch ordered separately
Pre-arc I²t	21000 A²s
Clearing I²t at 660 V (power factor 15%)	140000 A²s
Watts loss at rated current	65 W
Interrupting rating	200 kA RMS symmetrical (estimated 300 kA)
Overall length (B)	148 mm
Mounting centres (C1 / C2)	123 / 110 mm
Body A x D x E	50 x 59 x 45 mm

Technical document (PDF)  |  Request a quote for 170M3770 (reply within 24 hours)