Skip to main content

All locations

Please select your country & language

China | 中国
Germany | Deutschland

Your country is not in the list?

Go to our international website:

Mersen EP International website
Contact us

Approvals & Standards

  • UL Listed to Standard 248-9 File E2137
  • CSA Certified to Standard C22.2 No. 248.9 (The Canadian Electrical Code requires these fuses in ratings 15 through 60A to be of the low melting point design; use OTN 15-60.)
  • Self-certified for DC per UL248

Key features & benefits

One-Time OT and OTN general purpose fuses provide low cost protection for feeder and branch-circuits serving lighting, heating, and other non-motor loads. OT and OTN fuses will safely interrupt available short-circuit currents up to 50,000 amperes in all ratings. OT and OTN fuses are not rejection fuses and care should be taken to ensure that replacement fuses do not have lower interrupting ratings than original fuses. OTN(15-60) satisfy the Canadian electrical code requirement for Type P low melting-point, non-time-delay fuses.

More specifications

Applications

  • Feeders
  • Branch circuits
  • Resistive heating
  • Residential and small commercial installations

Product Specifications

Frequency (Hz)

50/60   Hz

Ampere range

1 to 600 A  

Fuse class

Class K5  

Speed/Characteristic

Fast-Acting  

UL file number

File E2137  

UL Category Code

JDDZ  

CSA File number

Class 1421-01 Guide 012636_0  

REACH Compliant

Yes  

Max Operating Temp.

80   °C

Max Storage Temp.

80   °C

Min Storage Temp.

-25   °C

Harmonized System

853610  

References in this series  (47)

OT600

600   A

-

-

No

1.1793   kg

OT65

65   A

-

-

No

0.1179   kg

OT7

7   A

-

-

No

0.0181   kg

OT70

70   A

-

-

No

0.1179   kg

OT75

75   A

-

-

No

0.1179   kg

OT8

8   A

-

-

No

0.0181   kg

OT80

80   A

-

-

No

0.1179   kg

OT90

90   A

-

-

No

0.1179   kg

OTN15

15   A

-

-

No

0.0181   kg

OTN20

20   A

-

-

No

0.0181   kg

OTN25

25   A

-

-

No

0.0181   kg

OTN30

30   A

-

-

No

0.0181   kg

OTN35

35   A

-

-

No

0.0408   kg

OTN40

40   A

-

-

No

0.0408   kg

OTN45

45   A

-

-

No

0.0408   kg