© 2017 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 03/22/17

Radial Leaded > 250R Series

Ambient OperationTemperature

-40°C

-20°C

0°C

20°C

40°C

50°C

60°C

70°C

85°C

Part Number

Hold Current (A)

250R080

0.12

0.11

0.09

0.08

0.06

0.05

0.05

0.04

0.03

250R080T

0.12

0.11

0.09

0.08

0.06

0.05

0.05

0.04

0.03

250R120

0.18

0.16

0.14

0.12

0.10

0.09

0.08

0.06

0.05

250R120T

0.18

0.16

0.14

0.12

0.10

0.09

0.08

0.06

0.05

250R145

0.26

0.20

0.17

0.145

0.12

0.11

0.09

0.08

0.06

250R145T

0.26

0.20

0.17

0.145

0.12

0.11

0.09

0.08

0.06

250R180

0.28

0.23

0.21

0.18

0.16

0.13

0.10

0.11

0.083

250R180T

0.28

0.23

0.21

0.18

0.16

0.13

0.10

0.11

0.083

Temperature Rerating

Temperature Rerating Curve

-40 -30 -20 -100

10

20 30

40

50 60

70

80

10%

30%

50%

70%

90%

110%

130%

150%

170%

Temperature (°C)

Average Time Current Curves

The average time current curves and Temperature Rerating curve performance is affected

by a number or variables, and these curves provided as guidance only. Customer must

verify the performance in their application.

Note:

Typical Temperature rerating curve, refer to table for derating data

0.01

0.1

1

10

100

1000

10000

100000

0.11

10

100

Fault Current in Amperes

A

B

C

D

Curve

Designation

I

hold

(A)

A

0.18

B

0.145

C

0.12

D

0.80

Additional Information

Datasheet

Samples

Resources

Samples