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. 647-8156
Mfr. Part No.MF-MSMF050-2
BrandBourns
$0.508
Each (In a Pack of 10)
units
1A 15V 0.15s 0.5A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.15Ω 0.8W -40°C +85°C
RS Stock No. 647-8392
Mfr. Part No.MF-USMF035-2
BrandBourns
$0.562
Each (In a Pack of 10)
units
- 6V 0.2s 0.35A 40 A 3.43mm 0.85mm 2.8mm Electroless Nickel Immersion Gold 0.2Ω 1.3Ω 0.6W -40°C +85°C
RS Stock No. 517-7206
Mfr. Part No.MICROSMD005F-2
BrandLittelfuse
$0.517
Each (In a Pack of 20)
units
150mA 30V dc 1.5s 0.05A 10 A 3.43mm 0.85mm 2.8mm - 3.6Ω 50Ω 1W - +85°C
RS Stock No. 867-5343
Mfr. Part No.SMD150F/33-2
BrandLittelfuse
$0.597
Each (In a Bag of 10)
units
3A 33V dc 5s 1.5A 40 A 9.4mm 3mm 6.71mm - 0.08Ω 230mΩ 1.9W -40°C +85°C
RS Stock No. 164-8233
Mfr. Part No.SMD150F/33-2
BrandLittelfuse
$1,074.98
1 Tape of 1500
Tape(s)
3 33V dc 5s 1.5A 40 A 9.4mm 3mm 6.71mm - 0.08Ω 230mΩ 1.9W -40°C +85°C
RS Stock No. 897-8967
Mfr. Part No.MF-MSMF250/16X-2
BrandBourns
$1.12
Each (In a Pack of 10)
units
5A 16V 5s 2.5A 100 A 4.83mm 1.6mm 3.41mm Gold Plated Nickel 0.015Ω 100mΩ 1.2W -40°C +85°C
RS Stock No. 787-4182
Mfr. Part No.1206L016WR
BrandLittelfuse
$0.558
Each (In a Pack of 10)
units
- 30V dc 0.3s 0.16A 100 A 3.4mm 1.45mm 1.8mm Tin Plated Copper 1.2Ω 4.5Ω 0.6W -40°C +85°C
RS Stock No. 647-8178
Mfr. Part No.MF-MSMF030-2
BrandBourns
$0.414
Each (In a Pack of 10)
units
- 30V 0.1s 0.3A 10 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.3Ω 0.8W -40°C +85°C
RS Stock No. 506-937
Mfr. Part No.NANOSMDC020F
BrandLittelfuse
$0.533
Each (In a Pack of 10)
units
420mA 24V dc 0.1s 0.2A 100 A 3.4mm 0.82mm 1.8mm - 0.65Ω 3.1Ω 0.6W - +85°C
RS Stock No. 647-8140
Mfr. Part No.MF-MSMF020-2
BrandBourns
$0.50
Each (In a Pack of 10)
units
- 30V 0.06s 0.2A 80 A 4.73mm 1.1mm 3.41mm Electroless Nickel Immersion Gold 0.4Ω 0.8W -40°C +85°C
RS Stock No. 787-4195
Mfr. Part No.1206L035/16YR
BrandLittelfuse
$0.569
Each (In a Pack of 10)
units
- 16V dc 0.1s 0.35A 100 A 3.4mm 0.75mm 1.8mm Tin Plated Copper 0.3Ω 1.2Ω 0.6W -40°C +85°C
RS Stock No. 517-7054
Mfr. Part No.SMD100F-2
BrandLittelfuse
$0.629
Each (In a Pack of 10)
units
2.2A 30V 0.5s 1.1A 40 A 7.98mm 3mm 5.44mm - 0.12Ω 480mΩ 1.7W - +85°C
RS Stock No. 517-7105
Mfr. Part No.MINISMDC020F-2
BrandLittelfuse
$0.431
Each (In a Pack of 10)
units
400mA 30V dc 0.02s 0.2A 10 A 4.73mm 0.89mm 3.41mm - 0.6Ω 3.3Ω 0.8W - +85°C
RS Stock No. 712-7470
Mfr. Part No.PICOSMDC035S-2
BrandLittelfuse
$0.722
Each (In a Pack of 10)
units
750mA 6V dc 0.2s 0.35A 100 A 2.2mm 0.68mm 1.5mm - 0.35Ω 1.4Ω 0.5W - +85°C
RS Stock No. 647-8207
Mfr. Part No.MF-MSMF110/16-2
BrandBourns
$0.562
Each (In a Pack of 10)
units
2.2A 16V 0.3s 1.1A 100 A 4.73mm 0.85mm 3.41mm Electroless Nickel Immersion Gold 0.04Ω 210mΩ 0.8W -40°C +85°C
RS Stock No. 647-8320
Mfr. Part No.MF-NSMF050-2
BrandBourns
$0.608
Each (In a Pack of 10)
units
1A 13.2V 0.1s 0.5A 100 A 3.4mm 0.85mm 1.8mm Electroless Nickel Immersion Gold 0.15Ω 700mΩ 0.4W -40°C +85°C
RS Stock No. 787-4255
Mfr. Part No.1812L110/33MR
BrandLittelfuse
$0.60
Each (In a Pack of 10)
units
1.95A 33V dc 0.5s 1.1A 20 A 4.73mm 2mm 3.41mm Tin Plated Copper 0.06Ω 200mΩ 0.8W -40°C +85°C
RS Stock No. 895-1631
Mfr. Part No.1812L050/30PR
BrandLittelfuse
$1.13
Each (In a Pack of 10)
units
1A 30V dc 0.15s 0.5A 100 A 4.73mm 1mm 3.41mm Solder Plated Copper 0.15Ω 0.8W -40°C +85°C
RS Stock No. 517-7111
Mfr. Part No.MINISMDC050F-2
BrandLittelfuse
$0.419
Each (In a Pack of 10)
units
1A 24V dc 0.15s 0.5A 100 A 4.73mm 0.62mm 3.41mm - 0.15Ω 0.8W - +85°C
RS Stock No. 517-7026
Mfr. Part No.SMD030F-2
BrandLittelfuse
$0.488
Each (In a Pack of 10)
units
600mA 60V 3s 0.3A 10 A 7.98mm 3.18mm 5.44mm - 1.2Ω 4.8Ω 1.7W - +85°C
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