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Welwyn Electronics Park Bedlington, Northumberland
Cramlington, England-NE227AA, United Kingdom+(44)-1670-822181
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Compact Flameproof Power Wire Wound Resistors

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WP1S WP2S WP25S WP3S WP4S WP5S
Power rating at 25 °C watts 1 2 2.5 3 4 5
5s overload rating at 25ºC watts 5 10 12.5 15 20 25
Short pulse performance See Pulse Performance graphs
Resistance range ohms R068 to 430R R05 to 900R R05 to 900R R01 to 2K2 R01 to 10K R015 to 6K8
Limiting element voltage volts 50 50 75 100 100 150
TCR ppm/°C <1R: 350 1R: 200
Isolation Voltage volts 250 350 500
Resistance Tolerance %
Standard Values E24 preferred
Thermal Impedance °C/watt 140 110 90 82 62 54
Ambient temperature range °C -55 to +155

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