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WHS2 Datasheet(PDF) 1 Page - Welwyn Components Limited |
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WHS2 Datasheet(HTML) 1 Page - Welwyn Components Limited |
1 / 4 page Wirewound High Surge Resistors WHS Series www.bitechnologies.com www.irctt.com www.welwyn-tt.com 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 08. 12 · Enhanced surge & pulse energy capacity · UL94-V0 flameproof protection · Radial taped form available · Surface mount Z-form available · RoHS compliant with Pb-free terminations Dimensions (mm) & Weight (g) Type L max D max f min d nom PCB mount centres Min bend radius Wt. nom WHS2 9.0 3.6 19.80 0.8 12.70 1.2 0.50 WHS3 14.5 5.2 24.55 20.30 1.10 WHS5 16.5 7.0 23.55 22.86 1.75 WHS7 25.0 8.8 28.30 31.40 4.40 WHS2 WHS3 WHS5 WHS7 Power rating at 25ºC watts 2 3 5 7 5s overload rating at 25ºC watts 10 15 25 35 Short pulse performance See Pulse Performance graphs Resistance range ohms 1R0-330R TCR ppm/ºC 200 Isolation Voltage volts 250 350 500 700 Resistance Tolerance % <20R: 5 ≥20R: 1, 2, 5 Standard Values E12 preferred Thermal Impedance ºC/watt 110 82 54 35 Ambient temperature range ºC -55 to +155 Construction A high purity ceramic substrate is assembled with interference fit end caps to which are welded the terminations. The resistive element is wound on the substrate and welded to the caps. Flameproof silicone cement coating is applied priorto marking with indelible ink. The components are then leadformed if required and packed. Electrical Data Physical Data No Limiting Element Voltage applies to this series; the Rated Voltage is √(P.R). f D d L |
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