Resettable Surface Mount Fuses

Resettable surface mount fuses are a reusable type of circuit protection device that is able to be mounted onto printed circuit boards. They trip when the current gets too high, but will function again when conditions return to an acceptable level.

How do resettable surface mount fuses work?

Resettable surface mount fuses form part of the circuit on a PCB (printed circuit board), allowing electrical current to flow through them. When a fault such as overcurrent is detected in the circuit, they are tripped, forcing a break in the circuit which prevents electricity from continuing to flow. This prevents any damage to the circuit or attached devices. Unlike non-resettable surface mount fuses, they can be used over and over, as they will reconnect the circuit when conditions return to normal.

Types of resettable surface mount fuses

Resettable surface mount fuses have a number of characteristics that can vary between models, including terminal material, voltage rating and their operating temperature range. They also come in various different sizes.


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Description Price Trip Current Voltage Rating Time to Trip Hold Current Maximum Current Length Height Width Terminal Material Minimum Resistance Maximum Resistance Power Dissipation Minimum Operating Temperature Maximum Operating Temperature
RS stock no. 787-4259
Mfr. Part No.1812L075/33DR
BrandLittelfuse
R 4.648
Each (In a Pack of 10)
units
1.5A 33 V dc 0.2s 0.75 A 20 A 4.73mm 1.55mm 3.41mm Tin Plated Copper 0.11Ω 400mΩ 0.8W -40°C +85°C
RS stock no. 867-5227
Mfr. Part No.MICROSMD010F-2
BrandLittelfuse
R 3.99
Each (In a Bag of 10)
units
250mA 30 V dc 1s 0.1 A 10 A 2.8mm 3.43mm 0.85mm Tin 2.1Ω 15Ω 0.8W -40°C +85°C
RS stock no. 787-4255
Mfr. Part No.1812L110/33MR
BrandLittelfuse
R 4.616
Each (In a Pack of 10)
units
1.95A 33 V dc 0.5s 1.1 A 20 A 4.73mm 2mm 3.41mm Tin Plated Copper 0.06Ω 200mΩ 0.8W -40°C +85°C
RS stock no. 787-4268
Mfr. Part No.2920L050DR
BrandLittelfuse
R 8.31
Each (In a Pack of 5)
units
1A 60 V dc 4s 0.5 A 10 A 7.98mm 1.25mm 5.44mm Tin Plated Copper 0.35Ω 1.4Ω 1.5W -40°C +85°C
RS stock no. 787-4198
Mfr. Part No.1206L050YR
BrandLittelfuse
R 4.275
Each (In a Pack of 10)
units
1A 6 V dc 0.1s 0.5 A 100 A 3.4mm 0.75mm 1.8mm Tin Plated Copper 0.15Ω 700mΩ 0.6W -40°C +85°C
RS stock no. 546-3030
Mfr. Part No.MICROSMD010F-2
BrandLittelfuse
R 5.043
Each (In a Pack of 20)
units
250mA 30 V dc 1s 0.1 A 10 A 3.43mm 0.85mm 2.8mm - 2.1Ω 15Ω 0.8W - +85°C
RS stock no. 787-4195
Mfr. Part No.1206L035/16YR
BrandLittelfuse
R 4.656
Each (In a Pack of 10)
units
- 16 V dc 0.1s 0.35 A 100 A 3.4mm 0.75mm 1.8mm Tin Plated Copper 0.3Ω 1.2Ω 0.6W -40°C +85°C
RS stock no. 517-7111
Mfr. Part No.MINISMDC050F-2
BrandLittelfuse
R 4.204
Each (In a Pack of 10)
units
1A 24 V dc 0.15s 0.5 A 100 A 4.73mm 0.62mm 3.41mm - 0.15Ω 0.8W - +85°C
RS stock no. 787-4209
Mfr. Part No.1206L025YR
BrandLittelfuse
R 4.656
Each (In a Pack of 10)
units
- 16 V dc 0.08s 0.25 A 100 A 3.4mm 1mm 1.8mm Tin Plated Copper 0.55Ω 2.3Ω 0.6W -40°C +85°C
RS stock no. 787-4218
Mfr. Part No.1812L050PR
BrandLittelfuse
R 3.877
Each (In a Pack of 10)
units
1A 15 V dc 0.15s 0.5 A 100 A 4.73mm 0.75mm 3.41mm Tin Plated Copper 0.15Ω 0.8W -40°C +85°C
RS stock no. 787-4205
Mfr. Part No.2920L100PR
BrandLittelfuse
R 8.684
Each (In a Pack of 5)
units
2.2A 33 V dc 0.5s 1.1 A 40 A 7.98mm 1mm 5.44mm Tin Plated Copper 0.12Ω 410mΩ 1.5W -40°C +85°C
RS stock no. 867-5242
Mfr. Part No.MICROSMD175F-2
BrandLittelfuse
R 4.068
Each (In a Bag of 10)
units
2.2A 30 V ac/dc 6.6s 1.1 A 30 A 7.4mm 14.2mm 3mm Tin Plated Copper Clad Steel - 170mΩ 1.17W -40°C +85°C
RS stock no. 164-8224
Mfr. Part No.NANOSMD200LR-2
BrandLittelfuse
R 15,411.97
1 Tape of 3000
Tape(s)
8A 6 V dc 3s 2.8 A 50 A 3.43mm 1.85mm 1mm Gold Plated Nickel 0.006Ω 24mΩ 1W -40°C +85°C
RS stock no. 867-5306
Mfr. Part No.NANOSMD200LR-2
BrandLittelfuse
R 3.897
Each (In a Bag of 10)
units
8A 6 V dc 3s 2.8 A 50 A 3.43mm 1.85mm 1mm Gold Plated Nickel 0.006Ω 24mΩ 1W -40°C +85°C
RS stock no. 787-4170
Mfr. Part No.1210L005WR
BrandLittelfuse
R 4.567
Each (In a Pack of 10)
units
- 30 V dc 1.5s 0.05 A 10 A 3.43mm 1.25mm 2.8mm Tin Plated Copper 3.6Ω 50Ω 0.6W -40°C +85°C
RS stock no. 138-679
Mfr. Part No.NANOSMDC050F/13.2-2
BrandLittelfuse
R 4.883
Each (In a Pack of 10)
units
1.1A 13.2 V dc 0.1s 0.5 A 100 A 3.4mm 0.74mm 1.8mm - 0.2Ω 750mΩ 0.8W - +85°C
RS stock no. 657-1750
Mfr. Part No.MICROSMD175F
BrandLittelfuse
R 7.529
Each (In a Pack of 10)
units
3.5A 6 V dc 0.8s 1.75 A 40 A 3.43mm 0.76mm 2.8mm - 0.025Ω 80mΩ 0.8W - +85°C
RS stock no. 787-4261
Mfr. Part No.2920L150DR
BrandLittelfuse
R 7.928
Each (In a Pack of 5)
units
3A 33 V dc 2s 1.5 A 40 A 7.98mm 1.25mm 5.44mm Tin Plated Copper 0.08Ω 230mΩ 1.5W -40°C +85°C
RS stock no. 624-3130
Mfr. Part No.NANOSMDC150F-2
BrandLittelfuse
R 4.556
Each (In a Pack of 10)
units
3A 6 V dc 0.3s 1.5 A 100 A 3.4mm 0.89mm 1.8mm - 0.04Ω 110mΩ 0.8W - +85°C
RS stock no. 164-8227
Mfr. Part No.NANOSMDCH010F-02
BrandLittelfuse
R 29,601.21
1 Tape of 4000
Tape(s)
- 30 V dc 0.1s 0.15 A 10 A 1.8mm 3.4mm 0.7mm Tin 1.1Ω 10Ω 0.8W - -