Type C1Q

2 / 4

Bel Fuse Inc.

300 Executive Drive, Suite 300

West Orange, NJ 07052 USA

+1 201.432.0463

Bel.US.CS@belf.com

belfuse.com/circuit-protection

© 2025 Bel Fuse, Inc.

Rev. C1Q Feb2025

Temperature Derating Curve

Average Time Current Curve

Electrical Specifications

Catalog

Number

Ampere

Rating

(A)

Nominal

Cold

Resistance

(ohms)

Nominal

Volt-drop

@100% In

(Volt)

Voltage and

Interrupting

Ratings

Melting I²T

@10 In

(A² Sec)

Nominal

Power

Dissipation

@100% In

(W)

Agency Approvals

C1Q 250

250mA

0.85

0.250

See Table of

Safety Approvals on

Page 1 for Voltage

and associated

Interrupting Ratings

0.00003

0.06

Y

Y

C1Q 375

375mA

0.48

0.222

0.00006

0.08

Y

Y

C1Q 500

500mA

0.32

0.195

0.00011

0.10

Y

Y

C1Q 750

750mA

0.175

0.163

0.00042

0.12

Y

Y

C1Q 1

1A

0.124

0.156

0.00096

0.16

Y

Y

C1Q 1.25

1.25A

0.092

0.149

0.0020

0.19

Y

Y

C1Q 1.5

1.5A

0.075

0.142

0.0024

0.21

Y

Y

C1Q 2

2A

0.054

0.140

0.005

0.28

Y

Y

C1Q 2.5

2.5A

0.042

0.138

0.008

0.35

Y

Y

C1Q 3

3A

0.035

0.136

0.020

0.41

Y

Y

C1Q 3.5

3.5A

0.030

0.140

0.029

0.49

Y

Y

C1Q 4

4A

0.028

0.144

0.038

0.58

Y

Y

C1Q 5

5A

0.022

0.154

0.075

0.77

Y

Y

C1Q 7

7A

0.015

0.160

0.116

1.12

Y

Consult manufacturer for other ratings

Specifications subject to change without notice