3

©2022 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 11/15/2022

Datasheet

Time-Current

Characteristic Curves

0.01

0.1

1

10

100

1000

10000

1

10

100

1000

Current (A)

Time-Current Characteristics

% of Rating

Current

Rating (A)

Opening Time

Min. / Max. (s)

100

35–40

360,000 / ∞

110

1–30

360,000 / ∞

135

1–2

3–40

0.35 / 600

0.750 / 600

160

1–40

0.250 / 50

200

1–2

3–40

0.1 / 5

0.15 / 5

350

1–2

3–40

0.02 / 0.5

0.08 / 0.5

600

1–30

35–40

0.1 max

0.15 max

Temperature Table

Max. allowed current load (A) at ambient temperature

(typical derating)

-40 °C

0 °C 20 °C 65 °C 85 °C 110 °C 125 °C

1 A

1

1

1

1

1

1

1

2 A

2

2

2

2

2

1

1

3 A

3

3

3

3

2

2

2

4 A

4

4

4

3

3

3

2

5 A

5

5

5

4

4

3

3

7.5 A

8

7

7

6

5

5

4

10 A

10

10

10

8

7

6

5

15 A

15

15

14

12

11

9

8

20 A

20

19

18

15

14

12

10

25 A

25

25

23

19

18

15

13

30 A

30

29

27

23

21

18

15

35 A

35

35

35

29

27

22

19

40 A

40

39

37

31

28

24

20

Typical Derating of Fuse Melting Element

Temperature security margin is 20 %.

Wire cross-section and fixture test setup refer to ISO 8820-3.

Please contact Littelfuse for details regarding derating test setup.

0

5

10

15

20

25

30

35

40

45

50

Ambient Temperature (°C)

1 A

2 A

3 A

4 A

5 A

7.5 A

10 A

15 A

20 A

25 A

30 A

35 A

40 A

-40

-30

-20

-10

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

Derating curves may change depending on the final condition of the application (terminals’ characteristics, wire

size, etc.). Please ask Littelfuse® for more information.

Max. Recommended

Environmental

Temperature

Ambient Temperature (°C)

ATO® Blade Fuses - Aftermarket

Rated 32V