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Resettable fuse Technical standards

文章出处:Fuses factory Author:Yaxun Electronics Popularity: Time:2017-06-14 13:02 【Big Middle Small
Resettable fuse Technical standards

1, minimum resistance (Rmin) / maximum resistance (Rmax)
At the specified ambient temperature,For example: 25 ℃,Before installation into the circuit, the specific type of Resettable fuse series,Polymer thermistor resistance will be within a specified range,That is, between the minimum value (Rmin) and the maximum value (Rmax).This value is listed in the resistance bar in the specification.

2, to maintain current
Maintain current is the maximum current that can be passed by the Resettable fuse series of polymer PTC thermistors while maintaining no action.Under limited environmental conditions,The device can remain for an infinite time,Without changing from a low-impedance state to a high-impedance state.

3, action current
Under limited environmental conditions,So that the self-resetting fuse in a limited time to move the minimum steady-state current.

4, the maximum current Imax (flow resistance)
In the limited state, Resettable fuse safe operation of the maximum operating current,I.e., the current value of the thermistor resistance.Beyond this value, the thermistor may be damaged,Can not be restored.This value is listed in the column of resistance flow.


Sign Definition
Ih Hold current-maximum current at which the device will not trip at 25℃
It Trip current-minimum current at which the device will always trip at 25℃
Vmax Maximum voltage at which the device will not trip
Vmaxi Maximum voltage device can withstand without damage at it rated current
Imax Maximum fault current device can withstand without damage at rated voltage
Rmin Minimum device resistance at 25℃ prior to tripping
Rmax Maximum device resistance at 25℃ prior to tripping
Figure The Figure of WHPTC
Lead Lead diameter
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