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USM - Midget

Approvals & Standards
USM:
UL Recognized to Standard 4248-1, File E52283
CSA File No. 032169, Class 6225-01
IEC 60269-2-1 and 60947-3 Compliant
USM-HEL:
UL Listed to Standard 4248-19 (PV), File E347822
CSA Component File No. 032169, Class 6225-30

Mersen USM Series UltraSafe Modular Fuse holders introduce a new level of safety for Midget 1-1/2" x 13/32" AC and DC-rated fuses up to 30 amperes. UltraSafe holders qualify as “Finger-safe” under IEC and DIN standards to an IP20 grade of protection, including fuse changing (with the flick of a finger). UltraSafe holders are available in 1, 2, 3 or 4 poles, with or without visual blown-fuse indicators in each pole. Multipole units can also be field assembled by ordering pin-tie handles. UltraSafe holders save up to 15% mounting space and any combination can be snapped onto 35mm DIN-rail for extra savings in panel building time. UltraSafe body material is tough and durable polyamide, with exceptional insulating properties.

Mersen USM Series UltraSafe Modular Fuse holders introduce a new level of safety for Midget 1-1/2" x 13/32" AC and DC-rated fuses up to 30 amperes. UltraSafe holders qualify as “Finger-safe” under IEC and DIN standards to an IP20 grade of protection, including fuse changing (with the flick of a finger). UltraSafe holders are available in 1, 2, 3 or 4 poles, with or without visual blown-fuse indicators in each pole. Multipole units can also be field assembled by ordering pin-tie handles. UltraSafe holders save up to 15% mounting space and any combination can be snapped onto 35mm DIN-rail for extra savings in panel building time. UltraSafe body material is tough and durable polyamide, with exceptional insulating properties.

Key features & benefits

  • IP20 Finger-Safe (touch safe)

  • Optional visual blown fuse Indicator lights

  • DIN-rail mounting

  • Compact footprint

  • Quick, tool-free, easy fuse change outs

  • USM use with: ATQ, ATM, A6Y-2B, A25Z-2, TRM, OTM, A13X-2, A60Q-2, DCT, HP6M, HP10M

Applications

  • All circuits up to 600 volts for motors, control circuits, transformers, etc…

  • DC circuits up to 1000VDC including photovoltaic applications

  • Non-load disconnect

Technical Specifications
Frequency (Hz) 50/60 Hz
Amperage Range 0 to 30 A
Fuse Class Midget
Short Circuit Current Rating (SCCR) 100 kA
Flammability Rating 94 V-0

Reference Finder

14 references in this series

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Item number Ampere rating Fuse size Fuse Type/Class Number of poles Indication System Product weight
USM3N See product
 30A - Midget 3-Pole+N No 0.195kg
USM4 See product
 30A - Midget 4-Pole No 0.254kg
USM4I See product
 30A - Midget 4-Pole Yes 0.254kg
USN See product
 30A - Midget N No 0.0635kg
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