Datasheet

WIRE WOUND RESISTORS CERAMIC ENCASED TYPE
HEA
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS/ DATA
Power Rating(RatedAmbientTemperature) FullPowerdissipationat70°Cand
 linearlyderatedtozeroat350°C
 (ReferDeratingCurveabove)
Resistance Tolerances Available ±10%(K);±5%(J);±3%(H);±2%(G);±1%(F)
Temperature Range -55°Cto+350°Cwithsuitablederating
 asperderatingcurve
Voltage Rating / Limiting Voltage /  V=PxR
Max. Working Voltage
Maximum Overload Voltage Variesdependingonresistancevalue,durationof
 overloadandtypeofpulsewaveform
 (contactfactoryfordetails)
Voltage Proof / Dielectric Withstanding Voltage ∆R±[1%+R05]-Noflashover,mechanical
(basedonlimitingvoltagex2for60secs) damage,arcingorinsulationbreakdown
Short Time Overload ∆R±[2%+R05]
(5xRatedPowerfor5secs)
Temperature Co-efficient of Resistance ±120ppm/°Cfor<R10(Average)
 ±80ppm/°Cfor<1R0(Average)
 ±60ppm/°Cfor<100R(Average)
 ±90ppm/°Cor±30ppm/°Cfor>100R
 dependingonwireselected
Insulation Resistance >1000MΩ(Min)
Temperature Cycling  ∆R±[2%+R05]
(RoomTemperature -55°C RoomTemperature
200°C RoomTemperaturefor5cycles)
Damp Heat(SteadyState) ∆R±[2%+R05]-Average
(40°Cat93%R.Hfor1000hours-noloadapplied)
Endurance - Load life  ∆R±[≤ 3%+R05]-Average
(70°Cwithlimitingvoltage-1.5hourson/
0.5hoursofffor1000hours)
PARAMETER/PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS
WELTRON Elektronik GmbH // Tel: [phone] // Fax: [phone] // E-Mail: [e-mail]
WELTRON Elektronik GmbH // Tel: [phone] // Fax: [phone] // E-Mail: [e-mail]