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.
Description:
Surface mount fuses offer considerable space (and time)
saving features for low voltage applications. The FF types are ideal for protection of high value silicon IC's e.g. alarm systems, audio/visual equipment, computer boards, portable telephones, power supplies, medical apparatus etc. ...
Description:
Littelfuse 451 series of NANO2 surface mount fuses
are very small wire-in-air (WIA) square shape surface mount devices which are suitable for a variety of secondary side circuit over-current protection applications. Very fast actingSmall sizeLow temperature de-rating.
Description:
Applications include USB port protection, PC motherboards -
Plug and Play protection, mobile phones - battery and port protection and PDAs/digital cameras. Compact design to save board space - 0603 footprintSmall size results in very fast time to react to ...
Description:
The 0603L Series PTC provides surface mount overcurrent
protection for applications where space is at a premium and resettable protection is desired. Lead-free and Halogen-freeFast response to fault currentsCompact design saves board spaceLow resistanceLow-profileCompatible with high temperature ...
