Arcol has announced availability of the RW wire-wound discharge resistor. The resistor is designed for quick and easy mounting on to capacitors typically to be used as a discharge or balancing resistor.
Discharge resistors are routinely connected across large value output capacitors found in electrical and electronic equipment which may store dangerous levels of energy after the equipment has been turned off. Providing a safe discharge avoids any hazardous conditions when connecting other equipment or during service or repair. Balancing resistors are used when a number of capacitors are connected in series to ensure voltages across any individual capacitor does not exceed its maximum rating.
The RW discharge resistor provides simple to fit screw mounting, is rated up to 22W, has a wide operating temperature range and is RoHS compliant. Three power ratings are available 10W, with ohmic value range of 1-15kohm, 13W with values from 1-2kohm and 22W from 1-33kohm
Key specifications include operating temperature -55C to +200C, over-load / over-voltage ten times rated power for five seconds, de-rating 80C to 175C linearly, tolerance (code) ±1% (FUnit of capacitance. The basic unit of a measure of a capacitor. A capacitor charged to 1 volt with a charge of 1 coulombA coulomb is the unit of electric charge. It is named after Charles-Augustin de Coulomb.1 coulomb is the amount of electric charge transported by a current of 1 ampere in 1 second. It can also be defined in terms of capacitance and voltage, where one coulomb is defined as one farad of capacitance times one volt of electric potential difference. would have a capacitance of 1 farad. 1 microF = .000001 Farads.), ±5% (J), temperature coefficientThe change in capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. with temperature expressed linearly as parts per million per degree centigrade (PPM/°C), or as a percent change over a specified temperature range. Most film capacitors are not linear and TC is expressed in percent. 30ppm and 100ppm/C as standard, says the company.
