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. 174-0888
Mfr. Part No.RF0319-000
BrandLittelfuse
HK$6.21
Each (In a Pack of 10)
units
2.2A 33 V dc 0.5s 1.1 A 40 A 7.98mm 3mm 5.44mm - 0.12Ω 410mΩ 1.7W -40°C +85°C
RS Stock No. 174-0388
Mfr. Part No.RF1359-000
BrandLittelfuse
HK$67,247.16
1 Reel of 15000
Reel(s)
2.2A 6 V dc 0.1s 1.1 A 100 A 3.4mm 0.67mm 1.8mm - 0.07Ω 200mΩ 0.8W -40°C +85°C
RS Stock No. 817-1614
Mfr. Part No.CMF-RL25U-0
BrandBourns
HK$4.157
Each (In a Pack of 10)
units
150mA 220 V 0.25s 0.06 A 900 mA - 3.5mm 5.2mm - - 25Ω - -40°C +125°C
RS Stock No. 174-0321
Mfr. Part No.0251010.MRT1L
BrandLittelfuse
HK$3,295.10
1 Reel of 1000
Reel(s)
- 125 V ac/dc - - 10 A 7.11mm - 2.8 Dia.mm - - 0.007Ω - -55°C +125°C
RS Stock No. 895-1634
Mfr. Part No.2016L050MR
BrandLittelfuse
HK$3.903
Each (In a Pack of 10)
units
1.1A 60 V dc 5s 0.55 A 20 A 5.44mm 2mm 4.43mm Solder Plated Copper 0.2Ω 1.4W -40°C +85°C
RS Stock No. 174-0387
Mfr. Part No.RF1346-000
BrandLittelfuse
HK$67,247.16
1 Reel of 15000
Reel(s)
750mA 16 V dc 0.1s 0.35 A 20 A 3.4mm 0.82mm 1.8mm - 0.45Ω 1.35Ω 0.6W -40°C +85°C
RS Stock No. 174-0320
Mfr. Part No.0251.750MAT1L
BrandLittelfuse
HK$3,295.10
1 Box of 1000
Box(es)
- 125 V ac/dc - - 750 mA 7.11mm - 2.8 Dia.mm - - 0.17Ω - -55°C +125°C
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