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IC protectors are a type of solid state fuse often seen in consumer electronic equipment. |
IC Protector Properties
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IC protectors are a type of solid state fuse often seen in consumer electronic equipment. |
They look like a small plastic packaged transistor with only two legs. Their markings rarely reveal their purpose, and obtaining replacements can be tricky. They may be silk screened on the board as an R, an ICP, an F, or given any other unhelpful prefix. They are usually found in the supply rail to an IC, and typically have a maximum working voltage of 50V. Depending upon current rating, they have an internal resistance of around a tenth of an Ohm. It would appear that the N type are 'normal blow' where as the F type are 'fast blow'. Often there is a suffix letter also, though the meaning of this is undocumented. It may be a date or manufacturer code, if anyone can shed any light on this then please let me know. |
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| Type | Current Rating (A) | |
| F5 | N5 | 0.25 |
| F10 | N10 | 0.4 |
| F15 | N15 | 0.6 |
| F20 | N20 | 0.8 |
| F25 | N25 | 1.0 |
| F38 | N38 | 1.5 |
| F50 | N50 | 2.0 |
| F75 | N75 | 2.7 |
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