SWT/EWT Series Stackpole Electronics, Inc. Non-Flammable Edgewound Tubular Wirewound Resistor Features: * * * * * * * * Resistive Product Solutions High current capability RoHS compliant, lead-free and halogen-free Non-inductive style only available with silicone coating (NSWT) Suitable for soldering or thru bolt connections Wirewound ribbon on ceramic substrate SWT - Silicone coating provides temperature handling up to 350C SWTA - Adjustable version EWT - Vitreous enamel coating provides temperature handling up to 500C Electrical Specifications Type/Code Power Rating (Watts) @ 25C SWT25 / EWT25 SWT50 / EWT50 SWT100 / EWT100 SWT150 / EWT150 SWT175 / EWT175 SWT200 / EWT200 SWT225 / EWT225 SWT250 / EWT250 SWT300 / EWT300 25W 50W 100W 150W 175W 200W 225W 250W 300W Ohmic Range () and Tolerance 5%, 10% SWT NSWT 0.1 - 30K 0.1 - 100 0.1 - 50K 0.1 - 275 0.1 - 100K 0.12 - 680 0.1 - 150K 0.22 - 1.5K 0.15 - 100K 0.24 - 1.3K 0.1 - 200K 0.25 - 1.35K 0.2 - 130K 0.3 - 1.7K 0.5 - 125K 0.33 - 1.8K 0.5 - 150K 0.42 - 2.25K Dielectric Strength VAC 2,500 2,500 2,500 2,500 2,500 2,500 2,500 2,500 2,500 Power Derating Curve: Percent Rated Power (%) 100 -55C EWT 1 - 10K 1 - 20K 1 - 50K 1 - 80K 1 - 100K 1 - 120K 1 - 130K 1 - 200K 1 - 240K 25C 80 60 40 20 350C 0 -60 0 50 100 150 200 250 300 350 Ambient Temperature (C) Rev Date: 08/22/2018 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 1 www.seielect.com marketing@seielect.com SWT/EWT Series Stackpole Electronics, Inc. Non-Flammable Edgewound Tubular Wirewound Resistor Resistive Product Solutions Mechanical Specifications Type/Code(1) OD L ID 0.563 0.039 0.313 0.039 2.008 14.30 1.00 7.94 1.00 51.00 0.563 0.039 0.313 0.039 4.016 SWT50 / EWT50 14.30 1.00 7.94 1.00 102.00 0.752 0.039 0.500 0.039 6.496 SWT100 / EWT100 19.10 1.00 12.70 1.00 165.00 1.102 0.039 0.752 0.039 8.110 SWT150 / EWT150 28.00 1.00 19.10 1.00 206.00 1.126 0.039 0.752 0.039 8.504 SWT175 / EWT175 28.60 1.00 19.10 1.00 216.00 1.378 0.039 0.752 0.039 8.740 SWT200 / EWT200 35.00 1.00 19.10 1.00 222.00 1.126 0.039 0.752 0.039 10.512 SWT225 / EWT225 28.60 1.00 19.10 1.00 267.00 1.575 0.039 0.984 0.039 8.268 SWT250 / EWT250 40.00 1.00 25.00 1.00 210.00 1.575 0.039 0.984 0.039 10.236 SWT300 / EWT300 40.00 1.00 25.00 1.00 260.00 (1) NSWT series will have the same Mechanical Specifications as SWT series SWT25 / EWT25 Hardware: * * F 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.079 2.00 0.472 12.00 0.748 19.00 0.669 17.00 0.669 17.00 0.669 17.00 0.669 17.00 0.709 18.00 0.787 20.00 0.787 20.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 0.039 1.00 E G Unit 0.177 4.50 0.315 8.00 0.315 8.00 0.315 8.00 0.236 6.00 0.394 10.00 0.354 9.00 0.472 12.00 0.472 12.00 0.079 2.00 0.197 5.00 0.197 5.00 0.197 5.00 0.079 2.00 0.197 5.00 0.197 5.00 0.197 5.00 0.197 5.00 inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm Sturdy plated steel brackets, thru-bolts, centering washers, and insulating washers Brackets provide elongated mounting holes for ease of mounting Mounting Brackets Mechanical Specifications Resistor Power Rating 25W 50W A B C D E Unit 1.000 25.40 1.000 25.40 0.750 19.05 0.750 19.05 0.500 12.70 0.500 12.70 0.219 5.56 0.219 5.56 0.438 11.13 0.438 11.13 inches mm inches mm Rev Date: 08/22/2018 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 2 www.seielect.com marketing@seielect.com SWT/EWT Series Stackpole Electronics, Inc. Non-Flammable Edgewound Tubular Wirewound Resistor Resistive Product Solutions Mounting Brackets Mechanical Specifications (cont.) Resistor Power Rating 100W 150W 175W 200W 225W 250W 300W A B C D E Unit 1.000 25.40 1.500 38.10 1.500 38.10 1.500 38.10 1.500 38.10 1.500 38.10 1.500 38.10 0.750 19.05 0.875 22.23 0.875 22.23 0.875 22.23 0.875 22.23 0.875 22.23 0.875 22.23 0.500 12.70 1.250 31.75 1.250 31.75 1.250 31.75 1.250 31.75 1.250 31.75 1.250 31.75 0.219 5.56 0.281 7.14 0.281 7.14 0.281 7.14 0.281 7.14 0.281 7.14 0.281 7.14 0.438 11.13 0.563 14.30 0.563 14.30 0.563 14.30 0.563 14.30 0.563 14.30 0.563 14.30 inches mm inches mm inches mm inches mm inches mm inches mm inches mm Bolt and Washers Mechanical Specifications Metal Centering Washer Resistor Power Rating 25W 50W 100W 150W 175W 200W 225W 250W 300W OD 0.563 14.30 0.563 14.30 0.752 19.10 1.102 28.00 1.126 28.60 1.378 35.00 1.126 28.60 1.575 40.00 1.575 40.00 Core Length 2.008 51.00 4.016 102.00 6.496 165.00 8.110 206.00 8.504 216.00 8.740 222.00 10.512 267.00 8.740 222.00 10.709 272.00 Rev Date: 08/22/2018 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Mica Insulating Washer Bolt Length 2.500 63.50 4.750 120.65 7.000 177.80 7.750 196.85 9.125 231.78 9.250 234.95 11.250 285.75 9.250 234.95 11.125 282.58 Bolt No. 10 10 10 0.25" 0.25" 0.25" 0.25" 0.5" 0.5" 3 A B C D Unit 0.560 14.22 0.560 14.22 0.750 19.05 1.125 28.58 1.125 28.58 1.400 35.56 1.125 28.58 1.570 39.88 1.570 39.88 0.190 4.83 0.190 4.83 0.190 4.83 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.500 12.70 0.500 12.70 0.750 19.05 0.750 19.05 1.000 25.40 1.250 31.75 1.500 38.10 1.500 38.10 1.500 38.10 2.000 50.80 2.000 50.80 0.313 7.95 0.313 7.95 0.500 12.70 0.625 15.88 0.750 19.05 0.750 19.05 0.750 19.05 1.000 25.40 1.000 25.40 inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm inches mm www.seielect.com marketing@seielect.com SWT/EWT Series Stackpole Electronics, Inc. Non-Flammable Edgewound Tubular Wirewound Resistor Resistive Product Solutions Spring Clip Mechanical Specifications Resistor Power Rating 25W 50W A B C D Unit 0.625 15.88 0.625 15.88 0.250 6.35 0.250 6.35 0.469 11.91 0.469 11.91 0.313 7.95 0.313 7.95 inches mm inches mm RoHS Compliance Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to meet the various regulatory requirements now prevalent, such as the European Union's directive regarding "Restrictions on Hazardous Substances" (RoHS 3). As part of this ongoing program, we periodically update this document with the status regarding the availability of our compliant components. All our standard part numbers are compliant to EU Directive 2011/65/EU of the European Parliament as amended by Directive (EU) 2015/863/EU as regards the list of restricted substances. RoHS Compliance Status Description Package / Termination Type Standard Series RoHS Compliant Lead-Free Termination Composition Lead-Free Mfg. Effective Date (Std Product Series) Lead-Free Effective Date Code (YY/WW) SWT Non-Flammable Edgewound Tubular Wirewound Silicone Coating Resistor Special YES 100% Matte Sn Always Always EWT Non-Flammable Edgewound Tubular Wirewound Vitreous Enamel Coating Resistor Special YES 100% Matte Sn Always Always Standard Product Series "Conflict Metals" Commitment We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the "conflict region" of the eastern Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals used in the electronics industry is very complex, we work closely with our own suppliers to verify to the extent possible that the materials and products we supply do not contain metals sourced from this conflict region. As such, we are in compliance with the requirements of Dodd-Frank Act regarding Conflict Minerals. Rev Date: 08/22/2018 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. 4 www.seielect.com marketing@seielect.com SWT/EWT Series Stackpole Electronics, Inc. Non-Flammable Edgewound Tubular Wirewound Resistor Resistive Product Solutions Compliance to "REACH" We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High Concern) free and compliant with the requirements of EU Directive 1907/2006/EC, "The Registration, Evaluation, Authorization and Restriction of Chemicals", otherwise referred to as REACH. Contact us for complete list of REACH Substance Candidate List. Environmental Policy It is the policy of Stackpole Electronics, Inc. (SEI) to protect the environment in all localities in which we operate. We continually strive to improve our effect on the environment. We observe all applicable laws and regulations regarding the protection of our environment and all requests related to the environment to which we have agreed. We are committed to the prevention of all forms of pollution. How to Order 1 2 3 4 5 6 7 8 9 10 11 12 E W T M 5 0 J B 2 0 0 R Product Series Code Description Silicone Coating SWT (std) EWT Vitreous Enamel Non-inductive NSWT Silicone Coating Type Code Description Std Tab Connection M Mounting Hardware S Spring Clips L Welded Straight Leads A Adjustable Rev Date: 08/22/2018 This specification may be changed at any time without prior notice Please confirm technical specifications before you order and/or use. Power Code Power 25 25W 50 50W 100 100W 150 150W 175 175W 200 200W 225 225W 250 250W 300 300W 5 Tolerance Code Tol J 5% K 10% Code B Packaging Quantity Description Size All Sizes Bulk Each Resistance Value Four characters with the multiplier used as the decimal holder. 0.1 ohm = R100 1 ohm = 1R00 10 Kohm = 10K0 www.seielect.com marketing@seielect.com