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RCR MODEL
Home » Products » CEMENTED WIRE RESISTORS » RCR MODEL
GENERAL CHARACTERISTICS
Industrial resistors with adjustment collar and extremely high overload characteristics, which are mechanically very robust, non-flammable, with excellent insulation and high dissipation capacity. The external protection is ensured by a ceramic cement coating. The resistive element consists of wire in Ni-Cr alloy or constantan, twisted on an extremely high quality cylindrical ceramic support. They can be produced with different terminations depending on the model and ohm value, standard flag type B, with omega or fast-on terminals, and in versions with off-standard tolerances. The adjustment collar enables an intermediate value to be established. The stability of the contact is guaranteed up to the maximum surface temperature of 350°C.
- Standard tolerance ± 15%
- Temperature coefficient ≤ 100 ppm/°C
- Insulation resistance > 100 Mohm (500 Vdc)
- Max working temperature 350°C
N.B.: For adjustable resistors, you must keep in mind that the nominal power is understood as applied to the entire resistor, if only part of it is powered, the power applied must be reduced in proportion to the part that is not used.
The nominal power Pn in the table refers to the resistor placed horizontally in the open air with natural circulation with an ambient temperature of 25°C.
With forced ventilation, the dissipating nominal power from the resistor increases based on the speed of the air.
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