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Wirewound resistors target consumer products, appliances

Posted: 22 Nov 2006 ?? ?Print Version ?Bookmark and Share

Keywords:wirewound resistors? wirewound resistor? resistor? resistors? fuse?

Molded and conformally-coated wirewound resistors

TT electronics IRC Wire and Film Technologies Division releases a series of molded and conformally-coated wirewound resistors and combination resistor/fuses. The SP and SPP series resistors may be used in fusing and general-purpose application for power supplies, motor controllers, televisions, consumer electronic products and appliances.

The SP/SPP series resistors are available in power ratings of 1-, 2- and 3W. The standard resistance ranges from 0.1 ohm to 2.4 kiloohms depending on wattage, with standard tolerances of 5% and 10%.

The product family consists of the SP20F (1W molded fusible resistor), the SPF series (2W molded fusible resistor), the SP20 series (1W molded general-purpose resistor), and the SPH (2W general-purpose molded resistor). The SPP series resistors are conformally coated, and are available in 1-, 2- and 3W power ratings.

The SP20/SP20F and SPH/SPF are constructed by winding a metal alloy resistance wire around a fiberglass core. End caps with welded leads are crimped to the wound core, then the units are encased in a molded phenolic shell. The SPP is similarly constructed, but uses a conformal silicone coating instead of a phenolic shell. The fusible versions feature a flame resistant coating.

The SP20/SP20F and SPH/SPF series resistors are typically priced between 13 to 19 cents each, while the SPP series resistors are typically priced at 10 cents, both for quantities of 10,000. Lead times for the SP and SPP devices are from stock to six weeks.

- Gina Roos

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