WPRT TTELEC | Alldatasheet
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Technical content
±1.5 W ±1.0 D P ±1.0 ØJ ±0.2 C ±0.4 ØB ±0.2 K ±1.0 F ±0.5 G ±0.5 E ±0.5 ±0.1 ±0.1 H ±1.0 N ±0.2 S ±0.3 R ±0.3 Weight (nom.) S SB SR Wirewound Power Radial Terminal Resistor WPRT Series 10 to 50 watts Quick connect or soldered tag terminals Optional mounting bracket High overload capability AEC-Q200 qualified Flameproof case RoHS compliant WPRT10 WPRT15 WPRT20 WPRT30 WPRT40 WPRT50 Power rating at 25°C watts 10 15 20 30 40 50 Power rating at 70°C watts 10 12.3 16.4 24.6 32.8 41 5s overload rating at 25°C watts 50 75 100 150 200 250 Resistance range ohms 1R0 - 820R 1R0 – 1K0 2R0 – 1K2 3R0 – 1K5 6R0 – 1K5 6R0 – 1K5 Thermal impedance °C/watt 18 14 12 8.5 7 7 Isolation voltage volts 1000 TCR ppm/°C <20R: ±400, ≥20R: ±350 Resistance Tolerance % ±5 Standard Values E24 Ambient temperature range °C -55 to +155 Electrical Data Physical Data Note: No LEV applies. Maximum voltage (dc or rms) is √(P x R) Figure 1 - soldered tag (S) and the same with bracket (SB) Figure 2-soldered tag with rugged bracket (SR) All dimensions in mm and weights in g Maximum bow on length and width <1.00mm Resistors 06.18 General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. © TT Electronics plc www.ttelectronics.com/resistors BI Technologies IRC Welwyn All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Ambient Temper ature (°C) Maximum Load at rated power (1000hrs at 25°C and 70ºC) ΔR% 5 Derating from rated power Zero at 275ºC (see graph) Short term overload (5 x rated power) ΔR% 5 +0.05Ω Damp heat steady state (56 days, 40°C, ≥90% RH) ΔR% 5 +0.05Ω Temperature rapid change (5 cycles -55ºC to +155ºC) ΔR% 2 +0.05Ω Resistance to solder heat ΔR% 1 +0.05Ω Voltage Proof (1kV for 60s) No flashover, mechanical damage, arcing or breakdown Solderability Min. 95% coverage Name Main Material
1 Rod Al2O3
2 Filling Material SiO2
3 Ceramic Case Al2O3 CaO
4 Terminal Steel (tin plated)
5 Bracket Steel
6 Wire Element Resistance Alloy
A high purity ceramic rod, with force fit end caps onto which is wound a wire element. The element is fitted into a ceramic case with fireproof insulation cement. The terminal material is tin plated steel. Termination Strength: The terminations meet the requirements of IEC 86.2.21 Marking: Power rating, resistance value and tolerance are legend marked. Flammability: The resistor will not burn under any condition of applied temperature or overload. Solvent resistance: The body protection and marking are resistant to all normal industrial solvents suitable for printed circuits. Performance Data Body Temperature Rise 100 150 200 250 300 350 0 10 20 30 40 50 Pow er (W) Temperature Rise (°C) 10W 15W 20W 30W 40W 50W Temperature RiseDerating Curve 100 05 01 00 1502 00 2503 00 Ambient Temper ature (°C) Proportion of Rated Power (%) 10W 15W-50W Wirewound Power Radial Terminal Resistor WPRT Series 06.18 General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics’ own data and is considered accurate at time of going to print. © TT Electronics plc www.ttelectronics.com/resistors BI Technologies IRC Welwyn