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Resettable Fuses

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Tripping time with specified reference current IS
Tripping time with specified refe ...
Tripping time with specified reference current IS
Rated current
Rated current
Interrupting Current, Max.
Interrupting Current, Max.
Rated voltage V AC
Rated voltage V AC
Rated voltage V DC
Rated voltage V DC
Max. resistance 1 hour after switching off
Max. resistance 1 hour after swit ...
Max. resistance 1 hour after switching off
Operating temperature range, min.
Operating temperature range, min.
Operating temperature range, max.
Operating temperature range, max.
Housing
Housing
Pitch
Pitch
Dimension: Length
Dimension: Length
Dimension: Width
Dimension: Width
Dimension: Height
Dimension: Height
Diameter
Diameter
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Results (331)
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Series
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Type
Manufacturer
Assembly
Tripping time with specified reference current IS
Rated current
Interrupting Current, Max.
Rated voltage V AC
Rated voltage V DC
Max. resistance 1 hour after switching off
Operating temperature range, min.
Operating temperature range, max.
Housing
Pitch
Dimension: Length
Dimension: Width
Dimension: Height
Diameter
26
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Manufacturers Part No.

RUEF160

(RUEF160)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 1,6A THT RM5,8mm
Customer Part No.
Customer Project No.
Littelfuse
1.290 Pcs.
Next Stock Receipt
Week 23/2026
(120 Pcs.)
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
8.0 s
1.6 A
40.0 A
30.0 V AC
30.0 V DC
110.0 mOhm 
-40.0 °C
85.0 °C
5.8 mm
8.9 mm
3.0 mm
22.8 mm
27
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Manufacturers Part No.

RUEF185

(RUEF185)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 1,85A THT RM5,8mm
Customer Part No.
Customer Project No.
Littelfuse
430 Pcs.
Next Stock Receipt
Week 23/2026
(500 Pcs.)
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
8.7 s
1.85 A
40.0 A
30.0 V AC
30.0 V DC
90.0 mOhm 
-40.0 °C
85.0 °C
5.8 mm
10.2 mm
3.0 mm
23.3 mm
28
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Manufacturers Part No.

RUEF250

(RUEF250)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 2,5A THT RM5,8mm
Customer Part No.
Customer Project No.
Littelfuse
2.130 Pcs.
Next Stock Receipt
Week 23/2026
(1.000 Pcs.)
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
10.3 s
2.5 A
40.0 A
30.0 V AC
30.0 V DC
70.0 mOhm 
-40.0 °C
85.0 °C
5.8 mm
11.4 mm
3.0 mm
25.9 mm
29
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Manufacturers Part No.

RUEF300

(RUEF300)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 3A THT RM5,8mm
Customer Part No.
Customer Project No.
Littelfuse
1.990 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
10.8 s
3.0 A
40.0 A
30.0 V AC
30.0 V DC
80.0 mOhm 
-40.0 °C
85.0 °C
5.8 mm
11.4 mm
3.0 mm
24.1 mm
30
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Manufacturers Part No.

RUEF400

(RUEF400)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 4A THT RM5,8mm
Customer Part No.
Customer Project No.
Littelfuse
7.900 Pcs.
Planned Delivery Time
Ø 11 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
12.7 s
4.0 A
40.0 A
30.0 V AC
30.0 V DC
50.0 mOhm 
-40.0 °C
85.0 °C
5.8 mm
14.0 mm
3.0 mm
26.9 mm
31
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Manufacturers Part No.

RUEF500

(RUEF500)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 5A THT RM10,9mm
Customer Part No.
Customer Project No.
Littelfuse
1.020 Pcs.
Planned Delivery Time
Ø 11 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
14.5 s
5.0 A
40.0 A
30.0 V AC
30.0 V DC
50.0 mOhm 
-40.0 °C
85.0 °C
10.9 mm
14.0 mm
3.0 mm
31.7 mm
32
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Manufacturers Part No.

RUEF600

(RUEF600)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 6A THT RM10,9mm
Customer Part No.
Customer Project No.
Littelfuse
800 Pcs.
Planned Delivery Time
Ø 7 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
16.0 s
6.0 A
40.0 A
30.0 V AC
30.0 V DC
40.0 mOhm 
-40.0 °C
85.0 °C
10.9 mm
16.5 mm
3.0 mm
31.7 mm
33
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Manufacturers Part No.

RUEF700

(RUEF700)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 7A THT RM10,9mm
Customer Part No.
Customer Project No.
Littelfuse
175 Pcs.
Planned Delivery Time
Ø 9 Weeks
Available (from stock)
(at least 25 or mul. of 25)
RUEF
Self-resetting fuse
Littelfuse
THT
17.5 s
7.0 A
40.0 A
30.0 V AC
30.0 V DC
30.0 mOhm 
-40.0 °C
85.0 °C
10.9 mm
19.1 mm
3.0 mm
33.5 mm
34
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Manufacturers Part No.

RUEF800

(RUEF800)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 8A THT RM10,9mm
Customer Part No.
Customer Project No.
Littelfuse
340 Pcs.
Planned Delivery Time
Ø 11 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
18.8 s
8.0 A
40.0 A
30.0 V AC
30.0 V DC
20.0 mOhm 
-40.0 °C
85.0 °C
10.9 mm
21.6 mm
3.0 mm
36.0 mm
35
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Manufacturers Part No.

RUEF900

(RUEF900)
Littelfuse Poly-Switch Fuse RUEF 30VAC 30VDC 9A THT RM10,9mm
Customer Part No.
Customer Project No.
Littelfuse
410 Pcs.
Planned Delivery Time
Ø 11 Weeks
Available (from stock)
(at least 10 or mul. of 10)
RUEF
Self-resetting fuse
Littelfuse
THT
20.0 s
9.0 A
40.0 A
30.0 V AC
30.0 V DC
20.0 mOhm 
-40.0 °C
85.0 °C
10.9 mm
24.1 mm
3.0 mm
36.6 mm
36
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Manufacturers Part No.

SMD030F-2

(SMD030F-2)
Littelfuse Poly-Switch Fuse SMD_F 60VDC 0,3A SMD
Customer Part No.
Customer Project No.
Littelfuse
9.720 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
3.0 s
0.3 A
60.0 V DC
4800.0 mOhm 
7.98 mm
5.44 mm
3.18 mm
37
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Manufacturers Part No.

SMD050F-2

(SMD050F-2)
Littelfuse Poly-Switch Fuse SMD_F 60VDC 0,5A SMD
Customer Part No.
Customer Project No.
Littelfuse
8.640 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
4.0 s
0.5 A
60.0 V DC
1400.0 mOhm 
7.98 mm
5.44 mm
3.18 mm
38
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Manufacturers Part No.

SMD075F-2

(SMD075F-2)
Littelfuse Poly-Switch Fuse SMD_F 30VDC 0,75A SMD
Customer Part No.
Customer Project No.
Littelfuse
5.220 Pcs.
Planned Delivery Time
Ø 18 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
0.3 s
0.75 A
30.0 V DC
1000.0 mOhm 
7.98 mm
5.44 mm
3.18 mm
39
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Manufacturers Part No.

SMD100F-2

(SMD100F-2)
Littelfuse Poly-Switch Fuse SMD_F 30VDC 1,1A SMD
Customer Part No.
Customer Project No.
Littelfuse
3.950 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
0.5 s
1.1 A
30.0 V DC
480.0 mOhm 
7.98 mm
5.44 mm
3.0 mm
40
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Manufacturers Part No.

SMD125F-2

(SMD125F-2)
Littelfuse Poly-Switch Fuse SMD_F 15VDC 1,25A SMD
Customer Part No.
Customer Project No.
Littelfuse
1.350 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
2.0 s
1.25 A
15.0 V DC
250.0 mOhm 
7.98 mm
5.44 mm
3.0 mm
41
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Manufacturers Part No.

SMD150F-2

(SMD150F-2)
Littelfuse Poly-Switch Fuse SMD_F 15VDC 1,5A SMD
Customer Part No.
Customer Project No.
Littelfuse
3.380 Pcs.
Planned Delivery Time
Ø 14 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
5.0 s
1.5 A
15.0 V DC
250.0 mOhm 
9.4 mm
6.71 mm
3.0 mm
42
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Manufacturers Part No.

SMD185F-2

(SMD185F-2)
Littelfuse Poly-Switch Fuse SMD_F 33VDC 1,85A SMD
Customer Part No.
Customer Project No.
Littelfuse
2.230 Pcs.
Planned Delivery Time
Ø 6 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
5.0 s
1.85 A
33.0 V DC
150.0 mOhm 
9.4 mm
6.71 mm
3.0 mm
43
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Manufacturers Part No.

SMD200F-2

(SMD200F-2)
Littelfuse Poly-Switch Fuse SMD_F 15VDC 2A SMD
Customer Part No.
Customer Project No.
Littelfuse
700 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 10 or mul. of 10)
SMD_F
Self-resetting fuse
Littelfuse
SMD
12.0 s
2.0 A
15.0 V DC
125.0 mOhm 
9.4 mm
6.71 mm
3.0 mm
44
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Manufacturers Part No.

SMD250F-2

(SMD250F-2)
Littelfuse Poly-Switch Fuse SMD_F 15VDC 2,5A SMD
Customer Part No.
Customer Project No.
Littelfuse
325 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 25 or mul. of 25)
SMD_F
Self-resetting fuse
Littelfuse
SMD
25.0 s
2.5 A
15.0 V DC
85.0 mOhm 
9.4 mm
6.71 mm
3.0 mm
45
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Manufacturers Part No.

SMD300F-2

(SMD300F-2)
Littelfuse Poly-Switch Fuse SMD_F 6VDC 3A SMD
Customer Part No.
Customer Project No.
Littelfuse
1.700 Pcs.
Planned Delivery Time
Ø 4 Weeks
Available (from stock)
(at least 25 or mul. of 25)
SMD_F
Self-resetting fuse
Littelfuse
SMD
35.0 s
3.0 A
6.0 V DC
48.0 mOhm 
7.98 mm
5.44 mm
3.0 mm
46
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Manufacturers Part No.

MINISMDC010F-2

(MINISMDC010F-2)
Littelfuse Poly-Switch Fuse miniSMDC 60VDC 0,1A SMD 1812
Customer Part No.
Customer Project No.
Littelfuse
1.525 Pcs.
Planned Delivery Time
Ø 10 Weeks
Available (from stock)
(at least 25 or mul. of 25)
miniSMDC
Self-resetting fuse
Littelfuse
SMD
5.0 s
0.1 A
40.0 A
60.0 V DC
12700.0 mOhm 
1812
3.41 mm
0.89 mm
4.73 mm
47
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Manufacturers Part No.

MINISMDC014F-2

(MINISMDC014F-2)
Littelfuse Poly-Switch Fuse miniSMDC 60VDC 0,14A SMD 1812
TOP
Customer Part No.
Customer Project No.
Littelfuse
17.960 Pcs.
Next Stock Receipt
Week 23/2026
(4.600 Pcs.)
Available (from stock)
(at least 10 or mul. of 10)
miniSMDC
Self-resetting fuse
Littelfuse
SMD
0.008 s
0.14 A
10.0 A
60.0 V DC
6000.0 mOhm 
1812
3.41 mm
0.89 mm
4.73 mm
48
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Manufacturers Part No.

MINISMDC020F-2

(MINISMDC020F-2)
Littelfuse Poly-Switch Fuse miniSMDC 30VDC 0,2A SMD 1812
Customer Part No.
Customer Project No.
Littelfuse
8.660 Pcs.
Planned Delivery Time
Ø 15 Weeks
Available (from stock)
(at least 10 or mul. of 10)
miniSMDC
Self-resetting fuse
Littelfuse
SMD
0.02 s
0.2 A
10.0 A
30.0 V DC
3300.0 mOhm 
1812
3.41 mm
0.89 mm
4.73 mm
49
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Manufacturers Part No.

MINISMDC030F-2

(MINISMDC030F-2)
Littelfuse Poly-Switch Fuse miniSMDC 30VDC 0,3A SMD 1812
Customer Part No.
Customer Project No.
Littelfuse
2.370 Pcs.
Planned Delivery Time
Ø 15 Weeks
Available (from stock)
(at least 25 or mul. of 25)
miniSMDC
Self-resetting fuse
Littelfuse
SMD
0.1 s
0.3 A
40.0 A
30.0 V DC
750.0 mOhm 
1812
3.07 mm
0.89 mm
4.73 mm
50
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Manufacturers Part No.

MINISMDC050F-2

(MINISMDC050F-2)
Littelfuse Poly-Switch Fuse miniSMDC 24VDC 0,5A SMD 1812
TOP
Customer Part No.
Customer Project No.
Littelfuse
6.840 Pcs.
Planned Delivery Time
Ø 11 Weeks
Available (from stock)
(at least 10 or mul. of 10)
miniSMDC
Self-resetting fuse
Littelfuse
SMD
0.15 s
0.5 A
100.0 A
24.0 V DC
1000.0 mOhm 
1812
3.41 mm
0.62 mm
4.73 mm
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