004958DM

Resistors Make Possible Aluminium Housed Aluminium Housed Wirewound Resistors Wirewound Resistors WH Series WH Series High p ower dissipation up to 300W High power dissipation up to 300W All welded construction All welded construction Suitable for severe environ ments Suitable for severe environments DesignedDesign eford feoxrcellenexcetll thermalent the rcmonductivityal condu tcot heaivitytsinkto heatsink Spade terminal option Spade terminal option RoHS compliant RoHS compliant All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data WH5 WH10 WH25 WH50 Notes 2 1, 2 watts 10 15 25 50 On standard heatsink Power rating at 25C Resistance range ohms 0R01 to 10K 0R01 to 20K 0R01 to 44K 0R015 to 120K TCR (-55 to 200C) ppm/C <10R: 75 10R to <100R: 50 100R: 25 Resistance tolerance % 1(F), 2(G), 5(J) and 10(K) Low value limits ohms 1R at 1% 0R5 at 2% 0R05 at 5% 0R01 at 10% WH50 0R015 at 10% Isolation voltage volts 1500 1500 3000 3000 DC or AC peak Note 1: For load at full rating mount on aluminium heatsink 30.5 cm x 30.5 cm x 1.5 mm Note 2: WH25T & WH50T are additionally rated at 15A CECC 40203-006 Requirements * AA BA CA DA Notes Power rating at 25C watts 10 15 25 40 On standard heatsink Resistance range ohms 0R05 to 3K4 0R05 to 15K 0R05 to 33K 0R05 to 82K TCR (-55 to 200C) ppm/C 5R to 10R: 100 >10R: 50 Resistance tolerance % 1(F), 2(G), and 5(J) Low value limits ohms 1R at 1% 0R5 at 2% 0R05 at 5% Isolation voltage volts 1000 1000 2000 2000 DC or AC peak * This table indicates the CECC specification requirements which are met or exceeded by the corresponding WH series products. Limiting element voltage volts 150 250 500 1250 DC or AC rms Standard values E24 preferred range Other values to order Thermal impedance C/watt 16.0 10.0 6.0 3.5 On standard heatsink Ambient temperature range C -55 to 200 WH100 WH200 WH300 Notes Power rating at 25C watts 100 200 300 On standard heatsink Resistance range ohms 0R01 to 70K 0R01 to 50K 0R01 to 68K TCR (-55 to 200C) ppm/C 1K0: 100 >1K0: 25 Resistance tolerance % Standard 5(J) and 10(K). also available : 1(F) and 2(G) Low value limits ohms Typically 0R05: 5% 0R047: 10% Isolation voltage volts 6360 7070 7070 DC or AC peak Limiting element voltage volts 1900 1900 2500 DC or AC rms Standard values E24 preferred range Other values to order Thermal impedance C/watt 1 0.7 0.6 On standard heatsink Ambient temperature range C -55 to 200 General Note General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own test data and is considered accurate at time of print. All information is subject to TT Electronics own data and is considered accurate at time of going to print. www.ttelectronicsresistors.com Welwyn Components Limited TT Electronics plcWelwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com 07.14Aluminium Housed Aluminium Housed Wirewound Resistors Make Possible Wirewound Resistors WH Series Physical Data Dimensions (mm) & Weight (g) WH5, 10, 25 & 50 A B C E F G H L M N Dt Wt. Type Max 0.3 0.3 Min Max Max Dia 0.2 Max 0.5 Max Min Nom WH5 30 12.4 11.3 1.9 17 9 2.4 17.0 4.3 1.8 2.5 3.6 WH10 36.5 15.9 14.3 1.9 21 11 2.4 21.0 5.2 2.2 2.9 5.6 1 WH25 19.8 18.3 2.8 28 15 3.3 29.0 7.2 2.6 4.3 13 51 2 WH50 21.4 39.7 2.8 30 16 3.3 51.0 7.9 2.6 5.1 29 72.5 WH100, 200 & 300 L A B C D E F G H J K M Dt Wt. 3 Max Max Max Max Max 0.3 0.3 Max Max Max Nom Max Min Nom 47.5 88 24.1 27.3 65.2 35 37 11.8 15.4 3.7 4.4 - 7.0 115 WH100 72.5 145.7 41.8 45.5 89.7 70 57.2 20.5 10.4 5.5 5.1 103.4 15 475 WH200 72.5 184.4 41.8 45.5 127.7 104 59 20.5 12.4 5.5 6.6 141.4 15 700 WH300 Note 1: A for WH25T is 71.3 Note 2: A for WH50T is 95.5 Note 3: WH100: 0.25, WH200 & 300: 0.45 max max WH100 WH200 & 300 WH5, 10, 25 & 50 Spade terminal on WH25T & WH50T Nominal dims in mm End face tracking distance = Dt Construction Marking Cap and lead assemblies are fitted to a high purity The resistors are legend marked with type reference, ceramic substrate. The resistive element is wound onto resistance value and tolerance which will withstand all the substrate and welded to the caps. The wound rod is accepted industrial cleaning fluids. Values are marked then moulded and fitted into aluminium housing to give in accordance with IEC 62 optimum stability and reliability. General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own test data and is considered accurate at time of print. General Note Welwyn Components Limited TT Electronics reserves the right to make changes in product specification without notice or liability. Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com All information is subject to TT Electronics own data and is considered accurate at time of going to print. www.ttelectronicsresistors.com TT Electronics plc 07.14