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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

Key features & benefits

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.

More specifications

Applications

  • All circuits up to 600 volts for motors, control circuits, transformers, etc…
  • DC circuits up to 1000VDC including photovoltaic applications
  • Non-load disconnect

Product Specifications

Frequency (Hz)

50/60   Hz

Ampere range

0 to 30 A  

Fuse class

Midget  

Short Circuit Current Rating (SCCR)

100   kA

Degree of Protection (IP)

IP65  

Flammability rating

94 V-0  

UL file number

File E52283  

UL Category Code

IZLT2  

CSA File number

Class 6225, File 032169_0_000  

REACH Compliant

Yes  

Max Operating Temp.

80   °C

Max Storage Temp.

80   °C

Min Storage Temp.

-25   °C

Harmonized System

853690  

References in this series  (14)

USM1

30   A

-

Midget  

1-pole  

No

0.0635   kg

USM1HEL

30   A

-

-

1-pole  

No

0.0635   kg

USM1I

30   A

-

Midget  

1-pole  

Yes  

0.0635   kg

USM1I-DC24

30   A

-

Midget  

1-pole  

Yes  

0.0635   kg

USM1IHEL

30   A

-

Midget  

1-pole  

Yes  

0.0635   kg

USM2

30   A

-

Midget  

2-pole  

No

0.127   kg

USM2I

30   A

-

Midget  

2-pole  

Yes  

0.127   kg

USM3

30   A

-

Midget  

3-pole  

No

0.195   kg

USM3I

30   A

-

Midget  

3-pole  

No

0.195   kg

USM3IN

30   A

-

Midget  

3-Pole+N  

No

0.195   kg

USM3N

30   A

-

Midget  

3-Pole+N  

No

0.195   kg

USM4

30   A

-

Midget  

4-pole  

No

0.254   kg

USM4I

30   A

-

Midget  

4-pole  

Yes  

0.254   kg

USN

30   A

-

Midget  

N  

No

0.0635   kg