What are PTC Resettable Fuses ?
PTC Resettable Fuses are protective devices that limit current flow and reset automatically after a fault condition is cleared. They are commonly used in applications like new product design, maintenance, and field replacements. Important specifications for selection include Current, which determines the maximum load; Operating Temperature, which affects performance under different conditions; and Lead Spacing, which ensures compatibility with PCB layouts. Validating lifecycle status and sourcing options is crucial for procurement teams to mitigate risks.
Parts in this category
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Compare stocked parts across manufacturers and distributors, then add lines to your RFQ.
| Part & Mfr | Total Stock | Pricing & RFQ | Current | Height | Lead Spacing | Mounting Type | Operating Temperature | Ratings | Resistance | Size | Thickness (Max) | Time to Trip | Type | Voltage | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Littelfuse Inc.
|
66
|
Price on request
66
|
250 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 3 Ω | 0.063" L x 0.032" W (1.60mm x 0.80mm) | 0.030" (0.75mm) | 80 ms | Polymeric | 9V | |
Littelfuse Inc.
|
64
|
Price on request
64
|
350 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 1.2 Ω | 0.126" L x 0.065" W (3.20mm x 1.65mm) | 0.039" (1.00mm) | 100 ms | Polymeric | 30V | |
Littelfuse Inc.
|
63
|
Price on request
63
|
160 mA | - | - | Surface Mount | - | - | 1.1 Ω | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.039" (1.00mm) | 300 ms | Polymeric | 48V | |
Littelfuse Inc.
|
63
|
Price on request
63
|
1.85 A | 0.882" (22.40mm) | 0.199" (5.05mm) | Through Hole | -40°C ~ 85°C | - | 190 mΩ | 0.689" Dia x 0.118" T (17.50mm x 3.00mm) | - | 12.6 s | Polymeric | 72V | |
Littelfuse Inc.
|
60
|
Price on request
60
|
4.5 A | - | - | Surface Mount | -40°C ~ 85°C | - | 14 mΩ | 0.128" L x 0.065" W (3.25mm x 1.65mm) | 0.047" (1.20mm) | 2 s | Polymeric | 6V | |
|
Littelfuse Inc.
|
59
|
Price on request
59
|
250 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 2.3 Ω | 0.126" L x 0.065" W (3.20mm x 1.65mm) | 0.039" (1.00mm) | 80 ms | Polymeric | 16V | |
Littelfuse Inc.
|
58
|
Price on request
58
|
750 mA | 0.598" (15.20mm) | 0.199" (5.05mm) | Through Hole | -40°C ~ 85°C | - | 600 mΩ | 0.402" Dia x 0.118" T (10.20mm x 3.00mm) | - | 6.3 s | Polymeric | 72V | |
Bourns
|
58
|
Price on request
58
|
1.36 A | - | - | Surface Mount | -40°C ~ 125°C | AEC-Q200 | 330 mΩ | 0.314" L x 0.264" W (7.98mm x 6.71mm) | 0.118" (3.00mm) | 10 s | Polymeric | 16V | |
Bourns
|
57
|
Price on request
57
|
1.85 A | 0.902" (22.90mm) | 0.201" (5.10mm) | Through Hole | -40°C ~ 85°C | - | 190 mΩ | 0.701" L x 0.122" W (17.80mm x 3.10mm) | - | 12.6 s | Polymeric | 72V | |
Bourns
|
55
|
Price on request
55
|
200 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 3.5 Ω | 0.085" L x 0.053" W (2.15mm x 1.35mm) | 0.033" (0.85mm) | 20 ms | Polymeric | 9V | |
Littelfuse Inc.
|
55
|
Price on request
55
|
350 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 1 Ω | 0.063" L x 0.032" W (1.60mm x 0.80mm) | 0.030" (0.75mm) | 100 ms | Polymeric | 6V | |
Littelfuse Inc.
|
55
|
Price on request
55
|
4 A | - | - | Surface Mount | -40°C ~ 85°C | - | 40 mΩ | 0.290" L x 0.202" W (7.36mm x 5.12mm) | 0.063" (1.60mm) | 4 s | Polymeric | 15V | |
Littelfuse Inc.
|
51
|
Price on request
51
|
750 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 160 mΩ | 0.083" L x 0.053" W (2.10mm x 1.35mm) | 0.030" (0.75mm) | 200 ms | Polymeric | 6V | |
|
Littelfuse Inc.
|
50
|
Price on request
50
|
6 A | - | - | Surface Mount | -40°C ~ 85°C | - | 12 mΩ | 0.290" L x 0.202" W (7.36mm x 5.12mm) | 0.079" (2.00mm) | 2 s | Polymeric | 24V | |
Bourns
|
50
|
Price on request
50
|
65 mA | 0.532" (13.50mm) | 0.200" (5.08mm) | Through Hole | -40°C ~ 125°C | - | 50 Ω | 0.386" L x 0.197" W (9.80mm x 5.00mm) | - | 150 ms | Ceramic | 220V (600V Int) | |
Littelfuse Inc.
|
48
|
Price on request
48
|
2.5 A | 1.032" (26.20mm) | 0.402" (10.20mm) | Through Hole | -40°C ~ 85°C | - | 130 mΩ | 0.785" Dia x 0.122" T (19.93mm x 3.10mm) | - | 15.6 s | Polymeric | 60V | |
Littelfuse Inc.
|
48
|
Price on request
48
|
170 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 18 Ω | 0.742" L x 0.305" W (18.85mm x 7.75mm) | 0.485" (12.32mm) | 10 s | Polymeric | 60V (600V Int) | |
|
Littelfuse Inc.
|
47
|
Price on request
47
|
500 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 750 mΩ | 0.126" L x 0.065" W (3.20mm x 1.65mm) | 0.049" (1.25mm) | 100 ms | Polymeric | 24V | |
Bel Fuse
|
46
|
Price on request
46
|
300 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 2.3 Ω | 0.200" L x 0.160" W (5.08mm x 4.07mm) | 0.045" (1.15mm) | 3 s | Polymeric | 60V | |
Schurter Inc.
|
45
|
Price on request
45
|
500 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 700 mΩ | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.033" (0.85mm) | 100 ms | Polymeric | 13.2V | |
|
Littelfuse Inc.
|
45
|
Price on request
45
|
1.5 A | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 120 mΩ | 0.126" L x 0.065" W (3.20mm x 1.65mm) | 0.039" (1.00mm) | 300 ms | Polymeric | 8V | |
Bourns
|
45
|
Price on request
45
|
1.5 A | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 130 mΩ | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.028" (0.70mm) | 300 ms | Polymeric | 6V | |
Bourns
|
42
|
Price on request
42
|
3 A | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 48 mΩ | 0.287" L x 0.214" W (7.31mm x 5.44mm) | 0.118" (3.00mm) | 35 s | Polymeric | 6V | |
Littelfuse Inc.
|
42
|
Price on request
42
|
3.5 A | - | - | Surface Mount | -40°C ~ 85°C | - | 18 mΩ | 0.127" L x 0.102" W (3.22mm x 2.58mm) | 0.028" (0.70mm) | 2 s | Polymeric | 6V | |
Bel Fuse
|
41
|
Price on request
41
|
200 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 5 Ω | 0.179" L x 0.128" W (4.55mm x 3.24mm) | 0.035" (0.90mm) | 20 ms | Polymeric | 60V | |
Littelfuse Inc.
|
40
|
Price on request
40
|
2.6 A | - | - | Surface Mount | -40°C ~ 85°C | - | 50 mΩ | 0.186" L x 0.131" W (4.72mm x 3.33mm) | 0.079" (2.00mm) | 5 s | Polymeric | 16V | |
Bourns
|
38
|
Price on request
38
|
1.1 A | 0.662" (16.84mm) | 0.201" (5.10mm) | Through Hole | -40°C ~ 85°C | - | 380 mΩ | 0.427" L x 0.122" W (10.84mm x 3.10mm) | - | 8.2 s | Polymeric | 60V | |
Littelfuse Inc.
|
38
|
Price on request
38
|
500 mA | 0.539" (13.70mm) | 0.199" (5.05mm) | Through Hole | -40°C ~ 85°C | - | 1.17 Ω | 0.311" Dia x 0.118" T (7.90mm x 3.00mm) | - | 4 s | Polymeric | 72V | |
Littelfuse Inc.
|
38
|
Price on request
38
|
2.6 A | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 50 mΩ | 0.181" L x 0.128" W (4.60mm x 3.24mm) | 0.060" (1.52mm) | 5 s | Polymeric | 16V | |
Littelfuse Inc.
|
37
|
Price on request
37
|
7 A | 1.020" (25.90mm) | 0.400" (10.15mm) | Through Hole | -40°C ~ 85°C | - | 30 mΩ | 0.752" L x 0.118" W (19.10mm x 3.00mm) | - | 17.5 s | Polymeric | 30V | |
Littelfuse Inc.
|
36
|
Price on request
36
|
1.6 A | 0.598" (15.20mm) | 0.199" (5.05mm) | Through Hole | -40°C ~ 85°C | - | 110 mΩ | 0.350" L x 0.118" W (8.90mm x 3.00mm) | - | 8 s | Polymeric | 30V | |
Littelfuse Inc.
|
35
|
Price on request
35
|
140 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 6 Ω | 0.179" L x 0.128" W (4.55mm x 3.24mm) | 0.035" (0.89mm) | 8 ms | Polymeric | 60V | |
Bourns
|
35
|
Price on request
35
|
1.35 A | 0.744" (18.90mm) | 0.201" (5.10mm) | Through Hole | -40°C ~ 85°C | - | 170 mΩ | 0.350" Dia x 0.118" T (8.90mm x 3.00mm) | - | 7.3 s | Polymeric | 30V | |
Bourns
|
30
|
Price on request
30
|
90 mA | - | - | Surface Mount | -40°C ~ 125°C | - | 50 Ω | 0.433" L x 0.354" W (11.00mm x 9.00mm) | 0.453" (11.50mm) | 130 ms | Ceramic | 230V (600V Int) | |
|
Littelfuse Inc.
|
30
|
Price on request
30
|
1.5 A | - | - | Surface Mount | -40°C ~ 85°C | - | 110 mΩ | 0.127" L x 0.102" W (3.22mm x 2.58mm) | 0.042" (1.07mm) | 300 ms | Polymeric | 16V | |
Amphenol Thermometrics
|
29
|
Price on request
29
|
65 mA | 0.256" (6.50mm) | 0.200" (5.08mm) | Through Hole | 0°C ~ 55°C | - | 100 Ω | 0.177" Dia x 0.177" T (4.50mm x 4.50mm) | - | - | Ceramic | 265V | |
Bourns
|
27
|
Price on request
27
|
2 A | 0.551" (14.00mm) | 0.114" (2.90mm) | Through Hole | -40°C ~ 125°C | AEC-Q200 | 110 mΩ | 0.370" Dia x 0.118" T (9.40mm x 3.00mm) | - | 3 s | Polymeric | 16V | |
Bel Fuse
|
25
|
Price on request
25
|
500 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 850 mΩ | 0.085" L x 0.053" W (2.15mm x 1.35mm) | 0.049" (1.25mm) | 100 ms | Polymeric | 6V | |
|
Littelfuse Inc.
|
25
|
Price on request
25
|
5 A | 0.949" (24.10mm) | 0.400" (10.15mm) | Through Hole | -40°C ~ 85°C | - | 50 mΩ | 0.551" L x 0.120" W (14.00mm x 3.00mm) | - | 14.5 s | Polymeric | 30V | |
Schurter Inc.
|
24
|
Price on request
24
|
5 A | 0.980" (24.90mm) | 0.402" (10.20mm) | Through Hole | -40°C ~ 85°C | - | 50 mΩ | 0.685" L x 0.118" W (17.40mm x 3.00mm) | - | 14.5 s | Polymeric | 30V | |
|
Bourns
|
24
|
Price on request
24
|
2 A | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 85 mΩ | 0.128" L x 0.063" W (3.25mm x 1.60mm) | 0.063" (1.60mm) | 1 s | Polymeric | 6V | |
|
Littelfuse Inc.
|
24
|
Price on request
24
|
1.1 A | - | - | Surface Mount | -40°C ~ 85°C | - | 180 mΩ | 0.179" L x 0.128" W (4.55mm x 3.24mm) | 0.049" (1.25mm) | 300 ms | Polymeric | 16V | |
Littelfuse Inc.
|
21
|
Price on request
21
|
3 A | - | - | Surface Mount | -40°C ~ 85°C | - | 48 mΩ | 0.290" L x 0.202" W (7.36mm x 5.12mm) | 0.118" (3.00mm) | 35 s | Polymeric | 6V | |
Littelfuse Inc.
|
21
|
Price on request
21
|
50 mA | - | - | Surface Mount | -40°C ~ 85°C | AEC-Q200 | 50 Ω | 0.127" L x 0.102" W (3.22mm x 2.58mm) | 0.026" (0.67mm) | 1.5 s | Polymeric | 30V | |
|
Littelfuse Inc.
|
20
|
Price on request
20
|
9 A | 1.169" (29.70mm) | 0.402" (10.20mm) | Through Hole | -40°C ~ 85°C | - | 20 mΩ | 0.949" L x 0.120" W (24.10mm x 3.00mm) | - | 20 s | Polymeric | 30V | |
|
Littelfuse Inc.
|
20
|
Price on request
20
|
2.5 A | - | - | Surface Mount | -40°C ~ 85°C | - | 85 mΩ | 0.343" L x 0.250" W (8.70mm x 6.36mm) | 0.118" (3.00mm) | 25 s | Polymeric | 15V | |
Bel Fuse
|
19
|
Price on request
19
|
100 mA | - | - | Surface Mount | -40°C ~ 85°C | - | 15 Ω | 0.127" L x 0.102" W (3.22mm x 2.58mm) | 0.045" (1.15mm) | 1.5 s | Polymeric | 60V | |
Bourns
|
19
|
Price on request
19
|
750 mA | 0.630" (16.00mm) | 0.201" (5.10mm) | Through Hole | -40°C ~ 85°C | - | 600 mΩ | 0.409" Dia x 0.122" T (10.40mm x 3.10mm) | - | 6.3 s | Polymeric | 60V | |
Amphenol Thermometrics
|
12
|
Price on request
12
|
93 mA | 0.335" (8.50mm) | 0.200" (5.08mm) | Through Hole | 0°C ~ 55°C | - | 60 Ω | 0.236" Dia x 0.177" T (6.00mm x 4.50mm) | - | - | Ceramic | 265V | |
|
Littelfuse Inc.
|
12
|
Price on request
12
|
1.5 A | - | - | Surface Mount | -40°C ~ 85°C | - | 110 mΩ | 0.179" L x 0.128" W (4.55mm x 3.24mm) | 0.049" (1.25mm) | 500 ms | Polymeric | 12V |
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