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fusible wirewound resistors, 2.5 W
* by Vitrohm
* series CRF254-4
* taped
* triggered instantly on contact with mains voltage (230Veff), without flame or explosion
* the resistor wire is wound around a capped ceramic carrier and fused to the caps
* in ...
fusible wirewound resistors, 2.5 W
* by Vitrohm
* series CRF254-4
* taped
* triggered instantly on contact with mains voltage (230Veff), without flame or explosion
* the resistor wire is wound around a capped ceramic carrier and fused to the caps
* in case of vaporisation of the wire, a special varnish absorbs the metal vapour and prevents arcing and consequent short circuit.
* the winding wire is dimensioned in such a way that, for all resistance values between 10R and 330R vaporisation occurs with mains voltage
* the resistor elements are encased in a silicon varnish and, in the classic sense, are not electrically insulated
* for resistance values under 10R as well as for other voltages, it has been ensured that the resistor is flame retardant
* the triggering function, however, has to be tested on an individual basis
* resistance tolerance: ±5%
* power rating (70°C): 2.5W
* operating voltage, max.: (PxR)1/2
* thermal resistance: 65K/W
* insulation resistance: not insulated
* insulation voltage, max. (1 min.): 75V
* temperature coefficient: +120 ±50x10-6/K
* temperature range: -55 to +350°C
* climatic category: 55/350/56
* failure rate (value dependent): approx. 10x10-9/h
* terminal tensile strength: 50N
* solderability: 2.5s
* derating: linear 70°C to 350°C (0W)
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Product Stock Unit price Volume discounts -
0,245 € -
0,245 €