Resistors 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 AAllll ppaarrttss aarree PPbb--ffrreeee aanndd ccoommppllyy wwiitthh EEUU DDiirreecctitivvee 22001111//6655//EEUU aammeennddeedd bbyy ((EEUU)) 22001155//886633 ((RRooHHSS33)) Electrical Data 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 2000 3000 4000 TCR ppm/°C <20R: ±400, ≥20R: ±350 Resistance Tolerance % ±5 Standard Values E24 Ambient temperature range °C -55 to +155 Note: No LEV applies. Maximum voltage (dc or rms) is √(P x R) Physical Data 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 Weight (nom.) L W P ØJ C ØB K F G E M1 M2 H N S R Type D ±1.5 ±1.0 ±1.0 ±0.2 ±0.4 ±0.2 ±1.0 ±0.5 ±0.5 ±0.5 ±0.1 ±0.1 ±1.0 ±0.2 ±0.3 ±0.3 S SB SR WPRT10 48 10 9.0±1.0 32 4.1 5.5 2.5 3.0 8.7 5.0 12 4.2 4.2 18 23 60 72 11 16.5 18.5 WPRT15 48 12.5 11.5±1.0 32 4.1 6.2 2.5 3.0 8.0 6.0 12 4.2 4.2 21 23 60 72 18 24 27.5 WPRT20 63 12.5 13.5±1.0 44 4.1 6.2 2.5 3.0 10.0 6.0 12 4.2 4.2 21 23 74 86.5 27 34 37.5 WPRT30 75 19 19±1.0 54 4.1 7.6 3.2 4.0 9.5 7.5 18 4.2 4.2 32 39 88 105 66 80 87.5 WPRT40 90 19 19±0.6 70 4.1 7.6 3.2 4.0 9.5 7.5 18 5.2 4.5 32 39 104 122 81 94 105.5 WPRT50 90 19 19±0.6 70 4.1 7.6 3.2 4.0 9.5 7.5 18 5.2 4.5 32 39 104 122 81 94 105.5 General Note BI Technologies IRC Welwyn 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. www.ttelectronics.com/resistors © TT Electronics plc 11.20

PPhhyyssicicaal l DDaattaa FFigiguurere 2 2 – – c chhaannggee t hthee t wtwoo f ifxixiningg h hooleles sf rforomm c ciricrcleles st oto s lsolotst,s ,d deeleletete d dimimeennsisoionn Ø ØMM, ,a anndd a adddd d dimimeennsisoionns sM M11 & & M M22. . InIn t atabblele, ,a adddd c coolulummnns sf ofor rØ ØJ,J ,M M11 & & M M22, ,c chhaannggee t otolelerarannccees sf ofor rN N, ,S S & & R R. . FFigiguurere 1 1-s-sooldldeereredd t atagg(S(S) )a anndd t hthee s saammee w witihth b braracckkeet t( S(SBB) ) FFigiguurere 2 2-s-sooldldeereredd t atagg w witihth r uruggggeedd b braracckkeet t( S(SRR) ) AMlAMal lxdal iixdmmiimmuemnuesmn biso obinowosnw soin noi nm nl em mlnem gnat gnhatd nha d wna dwne diewg ihwigdthistdht sti hn< i n1<g .1 g0. 00m0mmm AMlAMal lxdal iixdmmiimmuemnuesmn biso obinowosnw soin noi nm nl em mlnem gnat gnhatd nha d wna dwne diewg ihwigdthistdht sti hn< i n1<g .1 g0. 00m0mmm LL WW PP ØØJJ CC ØØBB KK FF GG EE MM11 MM22 HH NN SS RR WWeeigighht t( n(noomm.). ) WiTrTypyepee w ound PowDD er Radial Terminal Resistor 11.5.5 ±±11.0.0 11.0.0 00.2.2 00.4.4 00.2.2 11.0.0 00.5.5 00.5.5 00.5.5 00.1.1 00.1.1 11.0.0 00.2.2 00.3.3 00.3.3 SS SSBB SSRR WWPPRRTT1100 4488 1100 99.0.0±±11.0.0 3322 44.1.1 55.5.5 22.5.5 33.0.0 88.7.7 55.0.0 1122 44.2.2 44.2.2 1188 2233 6600 7722 1111 1166.5.5 1188.5.5 WWPPRRTT1155 4488 1122.5.5 1111.5.5±±11.0.0 3322 44.1.1 66.2.2 22.5.5 33.0.0 88.0.0 66.0.0 1122 44.2.2 44.2.2 2211 2233 6600 7722 1188 2244 2277.5.5 WWPPRRTT2200 6633 1122.5.5 1133.5.5±±11.0.0 4444 44.1.1 66.2.2 22.5.5 33.0.0 1100.0.0 66.0.0 1122 44.2.2 44.2.2 2211 2233 7744 8866.5.5 2277 3344 3377.5.5 WPRT Series WWPPRRTT3300 7755 1199 1199±±11.0.0 5544 66.0.0 77.6.6 33.2.2 44.0.0 99.5.5 77.5.5 1188 44.2.2 44.2.2 3322 3399 8888 110055 6666 8800 8877.5.5 WWPPRRTT4400 9900 1199 1199±±00.6.6 7700 66.0.0 77.6.6 33.2.2 44.0.0 99.5.5 77.5.5 1188 55.2.2 44.5.5 3322 3399 110044 112222 8811 9944 110055.5.5 WWPPRRTT5500 9900 1199 1199±±00.6.6 7700 66.0.0 77.6.6 33.2.2 44.0.0 99.5.5 77.5.5 1188 55.2.2 44.5.5 3322 3399 110044 112222 8811 9944 110055.5.5 Physical Data FFigiguurere 4 4 – – c chhaannggee t hthee t wtwoo f ifxixiningg h hooleles sf rforomm c ciricrcleles st oto s lsolotst,s ,d deeleletete d dimimeennsisoionn Ø Ø44.2.200.2.2, ,a anndd a adddd d dimimeennsisoionns sM M11 & & M M22. . InIn t atabblele, ,a adddd c coolulummnns sf ofor rM M11 & & M M22, ,c coorrrerecct ts eseccoonndd c coolulummnn h heeaaddeedd L L t oto S S a anndd c chhaannggee t otolelerarannccees sf ofor rN N, ,S S & & R R. . Figure 3 - quick connect “amp” tag (A) Figure 4 - quick connect “amp” tag with and the same with bracket (AB) rugged bracket (AR) FFigiguurere 3 3 - -q quuicickk c coonnnneecct t“ a“ammpp” ” t atagg ( A(A) )a anndd t hthee s saammee w witihth FFigiguurere 4 4 - -q quuicickk c coonnnneecct t“ a“ammpp” ” t atagg w witihth r uruggggeedd b braracckkeet t( A(ARR) ) bbraracckkeet t( A(ABB) ) AlAl ldl idmimenesnisoinosn sin i nm mmm a nadn dw weiegihgthst sin i ng g AlAl ldl idmimenesnisoinosn sin i nm mmm a nadn dw weiegihgthst sin i ng g MMaxaixmimumum b obwow o no nle lnegntght ha nadn dw widitdht h< 1<.10.00m0mmm MMaxaixmimumum b obwow o no nle lnegntght ha nadn dw widitdht h< 1<.10.00m0mmm All dimensions in mm and weights in g Maximum bow on length and width <1.00mm Weight (nom.) L W P ØJ K F G E M1 M2 H N S R Type D ±1.5 ±1.0 ±1.0 ±0.2 ±1.0 ±0.5 ±0.5 ±0.5 ±0.1 ±0.1 ±1.0 ±0.2 ±0.3 ±0.3 LL WW PP ØØJJ KK FF GG EE MM11 MM22 HH NN SS RR AWWeeigighAhtB t( n(noomm.). A) R TTypypee DD 11.5.5 ±±11.0.0 11.0.0 00.2.2 11.0.0 00.5.5 00.5.5 00.5.5 00.1.1 00.1.1 11.0.0 00.2.2 00.3.3 00.3.3 WPRT10 48 10 9.0±1.0 32 4.1 3.0 8.7 5.0 12 4.2 4.2 19 23 60 72 S1S1 S1SB6B .5 SSR1R8 .5 WWPPRRTT1100 4488 1100 99.0.0±±11.0.0 3322 44.1.1 33.0.0 88.7.7 55.0.0 1122 44.2.2 44.2.2 1188 2233 6600 7722 1111 1166.5.5 1188.5.5 WPRT15 48 12.5 11.5±1.0 32 4.1 3.0 8.0 6.0 12 4.2 4.2 23.5 23 60 72 18 24 27.5 WWPPRRTT1155 4488 1122.5.5 1111.5.5±±11.0.0 3322 44.1.1 33.0.0 88.0.0 66.0.0 1122 44.2.2 44.2.2 2211 2233 6600 7722 1188 2244 2277.5.5 WPRT2W0WPPRRT6T23200 16263.3 5 111232..5.55 ± 11.0133.5.5±±141.40.0 44444. 1 44.13.1 .0 33.10.0 0 .01100.0.60 . 0 66.0.0 1 2 1122 4.244.2.2 4.244.2.2 252211 232233 774744 88686.6.55.5 222777 33434 4 33773.5.75 . 5 WWPPRRTT3300 7755 1199 1199±±11.0.0 5544 66.0.0 44.0.0 99.5.5 77.5.5 1188 44.2.2 44.2.2 3322 3399 8888 110055 6666 8800 8877.5.5 WPRT3W0WPPRRT7T45400 919090 111999 ± 1.01199±±00.56.46 76700. 0 66.04.0 .0 44.0.90 . 5 99.5.57 .5 77.5.5 1 8 1188 4.255.2.2 4.244.5.5 303322 393399 81810044 110125222 868161 99484 0 1100585.75.5 .5 WPRT4W0WPPRRT9T50500 919090 111999 ± 0.61199±±00.76.06 76700. 0 66.04.0 .0 44.0.90 . 5 99.5.57 .5 77.5.5 1 8 1188 5.255.2.2 4.544.5.5 303322 393399 110104044 112122222 888111 99494 4 11010550.5.55 . 5 WPRT50 90 19 19±0.6 70 6.0 4.0 9.5 7.5 18 5.2 4.5 30 39 104 122 81 94 105.5 Figur e 5 – as configuration A but with tighter tolerance terminal alignment (AT) and the same with bracket (AD) All dimensions in mm and weights in g Maximum bow on length and width <1.00mm L W P ØJ K F G E H Weight (nom.) Type D +0.5/-1.0 +0.5/-1.0 ±0.3 ±0.2 ±1.0 ±0.5 ±0.5 ±0.5 ±1.0 AT AD WPRT10 48 10 9.0 ±1.0 32 4.1 3.0 8.7 5.0 12 19 11 16.5 WPRT15 48 12.5 11.5 ±1.0 32 4.1 3.0 8.0 6.0 12 23.5 18 24 WPRT20 63 12.5 13.5 ±1.0 44 4.1 3.0 10.0 6.0 12 25 27 34 WPRT30 75 19 19 ±1.0 54 6.0 4.0 9.5 7.5 18 30 66 80 WPRT40 90 19 19 ±0.6 68 6.0 4.0 9.5 7.5 18 30 81 94 WPRT50 90 19 19 ±0.6 68 6.0 4.0 9.5 7.5 18 30 81 94 General Note BI Technologies IRC Welwyn 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. www.ttelectronics.com/resistors © TT Electronics plc 11.20

Wirewound Power Radial Terminal Resistor WPRT Series Construction 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. Name Main Material 1 Rod AlO 2 3 2 Filling Material SiO 2 3 Ceramic Case AlO CaO 2 3 4 Terminal Steel (tin plated) 5 Bracket Steel 6 Wire Element Resistance Alloy 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 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 Derating Curve Temperature Rise Body Temperature Rise 350 50W 100 %) 300 Power ( 80 15W -50W 10W e (°C) 250 15W 20W 30W 40W Rated 60 ure Ris 200 10W n of 40 erat 150 portio 20 Temp 100 o 50 Pr 0 0 0 50 100 150 200 250 300 0 10 20 30 40 50 Ambient Temperature (°C) Power (W) Ambient Temperature (°C) General Note BI Technologies IRC Welwyn 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. www.ttelectronics.com/resistors © TT Electronics plc 11.20

Wirewound Power Radial Terminal Resistor WPRT Series Pulse Performance The pulse energy capacity limits in the graph below relate to pulses below 100ms duration based on an instantaneous wire temperature rise of 750ºC. WPRT Series Energy Capability Graph 40&50W 30W 15W 20W 10W Resistance value (ohms) Application Notes S, SR and SB configurations have terminals which can be soldered. However, for full power operation, due to the possibility of high terminal temperatures, it is recommended that the connections be secured mechanically, rather than relying on the solder joint alone. AT and AD configurations are designed for use in molded housing assemblies, where the alignment of terminals and the body dimensions must be defined to a greater tolerance. SR and AR configurations have a bracket with two fixing points rather than one, and are ideal for high shock & vibration applications. Ordering Procedure Example: WPRT50AB-1K2JB168 (WPRT50, quick connect “amp” tag with bracket, 1.2 kilohms ±5%, Pb-free) W P R T 5 0 A B - 1 K 2 J B 1 6 8 1 2 3 4 5 1 2 3 4 5 Type Configuration Value Tolerance Packing WPRT10 S Soldered tag, no E24 = 3/4 J = ±5% Bulk pack WPRT15 bracket Fig. characters B440 S, SB, A, AB, AT, AD 440/box WPRT10 WPRT20 Soldered tag 1 R = ohms B330 SR, AR 330/box SB WPRT30 with bracket K = kilohms B400 S, SB, A, AB, AT, AD 400/box WPRT15 WPRT40 Soldered tag, Fig. B300 SR, AR 300/box SR WPRT50 rugged bracket 2 B270 WPRT20 All configurations 270/box “Amp” tag, no B240 WPRT30, S, A, AT 240/box A bracket Fig. B168 WPRT40, SB, AB, AD 168/box “Amp” tag with 3 B160 WPRT50 SR, AR 160/box AB bracket “Amp” tag, Fig. AR rugged bracket 4 “A” with tighter AT tolerances Fig. “AB” with tighter 5 AD tolerances General Note BI Technologies IRC Welwyn 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. www.ttelectronics.com/resistors © TT Electronics plc 11.20