A range of compact precision power wirewound SMD resistors are now available from Arcol Resistors.
The company advises the RWS feature an optimised thermal design for greater efficiency and improved surge capacity of up to five times for 5 seconds, whilst reducing surface temperature rise.
The range offers good overload characteristics, good stability, low standard TCR and low inductance and custom versions are available if required.
The resistors are wirewound, constructed on an alumina core with steel end caps. The body is an encapsulated epoxy moulded compound with thermo conductivity contours.
Typical applications include shunt resistors, power supply current sense, capacitor discharge and bleeder resistors.
The devices offer high reliability and have been engineered to reduce long term thermal damage to printed circuit boards and surrounding components.
They are RoHS compliant and available in low inductance format and with close TCR and standard tolerance of 0.5%, 1% and 5%. The operating temperature range is – 55°C to 155°C or 275°C depending on model.
They feature an ohmic range from R005 to 50K? at power ratings from 0.05 to 50K? at 5W, R1 to 5K? at 7W and up to 10K at 10W.