WP2S

WP-S TTELEC | Alldatasheet

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Small size for power rating Enhanced pulse handling capability Flameproof protection Surface mount ZI-form option RoHS compliant with Pb-free terminations Compact Flameproof Power Wirewound Resistors WP-S Series Small size for power rating Enhanced pulse handling capability Flameproof protection SMD Z-form available RoHS compliant with Pb-free terminations General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own data and is considered accurate at time of going to print. © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 A subsidiary of TT electronics plc Welwyn Components Dimensions (mm) & Weight (g) Type L max D max f min d nom PCB Min Wt. mount bend nom centres radius WP4S 13 5.6 22.75 19.00 1.00 A high purity ceramic substrate is assembled with interference fit end caps to which are welded the terminations. The resistive Note 1: 5.4 for values 0R1 Note 2: 5.8 for values 0R1 Note 3: 7.2 for values 0R1 element is wound on the substrate and welded to the caps. Flameproof silicone cement coating is applied prior to marking with indelible ink. The components are then leadformed if required and packed. Electrical Data Physical Data Construction D d L f WP1S WP2S WP25S WP3S WP4S WP5S Power rating at 25 °C watt s 1 2 2.5 3 4 5 5s overload rating at 25ºC watts 5 10 12.5 15 20 25 shparg ecnamrofreP esluP eeSecnamrofrep eslup trohS Resistance range ohms R068 to 430R R05 to 900R R05 to 900R R01 to 2K2 R01 to 10K R015 to 6K8 Limiting element voltage volts 50 50 75 100 100 150 053 :R1<C°/mppRCT ≥1R: 200 005053052stlovegatloV noitalosI Resistance Tolerance % Standard Values E24 preferred Thermal Impedance °C/wat t 140 110 90 82 62 54 200+ ot 55-C°egnar erutarepmet tneibmA ≥20R: 1, 2, 5 <R10: 5 ≥R10: 1, 2, 5 0.8 1.2(Note 1) (Note 2) (Note 3) ≥ ≥ ≥ WP2S / WPP2R All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Compact Flameproof Power Wirewound Resistors 10.24 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

WP-S Series Welwyn Components Performance Data Maximum Typical Change Load at rated power: 1000hrs @ 25°C ∆R% 5 +0.001Ω 3 Dry heat: 1000hrs @ 200°C ∆R% 5 +0.001Ω 3 Short term overload (5 x Pr for 5s) ∆R% 5 +0.001Ω 1 C°082 ta oreZC°52@ rewop detar morf gnitareD Climatic ∆R% 5 +0.001Ω 2 Climatic category 55/200/56 TRC & Vibration ∆R% 5 +0.001Ω 1 Robustness & solder heat ∆R% 5 +0.001Ω 1 Long term damp heat (56 days) ∆R% 5 +0.001Ω 1 Material: Hot tin dipped copper wire Strength: The terminations meet the requirements of IEC 68.2.21 Solderability: The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Termination s The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Solvent Resistance The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Flammability The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at 25ºC. Pulse Performance © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 100 WP-S Short Pulse Energy Capacity Value (ohms) 0.1 0.1 1 10 100 1000 10000 Energy (joules) WP5S WP4S WP3S WP2S / WPP2R WP1S WP25S WP1S, WP2S, WPP2R, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance. with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there is no multiplier band. WP4S and WP5S resistors are legend marked with type reference, resistance value and tolerance. Marking Compact Flameproof Power Wirewound Resistors WP-S Series Welwyn Components Performance Data Maximum Typical Change Load at rated power: 1000hrs @ 25°C ∆R% 5 +0.001Ω 3 Dry heat: 1000hrs @ 200°C ∆R% 5 +0.001Ω 3 Short term overload (5 x Pr for 5s) ∆R% 5 +0.001Ω 1 C°082 ta oreZC°52@ rewop detar morf gnitareD Climatic ∆R% 5 +0.001Ω 2 Climatic category 55/200/56 TRC & Vibration ∆R% 5 +0.001Ω 1 Robustness & solder heat ∆R% 5 +0.001Ω 1 Long term damp heat (56 days) ∆R% 5 +0.001Ω 1 Material: Hot tin dipped copper wire Strength: The terminations meet the requirements of IEC 68.2.21 Solderability: The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Termination s The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Solvent Resistance The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Flammability The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at 25ºC. Pulse Performance © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 100 WP-S Short Pulse Energy Capacity Value (ohms) 0.1 0.1 1 10 100 1000 10000 Energy (joules) WP5S WP4S WP3S WP2S / WPP2R WP1S WP25S WP1S, WP2S, WPP2R, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance. with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there is no multiplier band. WP4S and WP5S resistors are legend marked with type reference, resistance value and tolerance. Marking Compact Flameproof Power Wirewound Resistors WP-S Series Welwyn Components Performance Data Maximum Typical Change Load at rated power: 1000hrs @ 25°C ∆R% 5 +0.001Ω 3 Dry heat: 1000hrs @ 200°C ∆R% 5 +0.001Ω 3 Short term overload (5 x Pr for 5s) ∆R% 5 +0.001Ω 1 C°082 ta oreZC°52@ rewop detar morf gnitareD Climatic ∆R% 5 +0.001Ω 2 Climatic category 55/200/56 TRC & Vibration ∆R% 5 +0.001Ω 1 Robustness & solder heat ∆R% 5 +0.001Ω 1 Long term damp heat (56 days) ∆R% 5 +0.001Ω 1 Material: Hot tin dipped copper wire Strength: The terminations meet the requirements of IEC 68.2.21 Solderability: The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Termination s The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Solvent Resistance The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Flammability The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at 25ºC. Pulse Performance © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 100 WP-S Short Pulse Energy Capacity Value (ohms) 0.1 0.1 1 10 100 1000 10000 Energy (joules) WP5S WP4S WP3S WP2S / WPP2R WP1S WP25S WP1S, WP2S, WPP2R, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance. with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there is no multiplier band. WP4S and WP5S resistors are legend marked with type reference, resistance value and tolerance. Marking Compact Flameproof Power Wirewound Resistors WP-S Series Welwyn Components Performance Data Maximum Typical Change Load at rated power: 1000hrs @ 25°C ∆R% 5 +0.001Ω 3 Dry heat: 1000hrs @ 200°C ∆R% 5 +0.001Ω 3 Short term overload (5 x Pr for 5s) ∆R% 5 +0.001Ω 1 C°082 ta oreZC°52@ rewop detar morf gnitareD Climatic ∆R% 5 +0.001Ω 2 Climatic category 55/200/56 TRC & Vibration ∆R% 5 +0.001Ω 1 Robustness & solder heat ∆R% 5 +0.001Ω 1 Long term damp heat (56 days) ∆R% 5 +0.001Ω 1 Material: Hot tin dipped copper wire Strength: The terminations meet the requirements of IEC 68.2.21 Solderability: The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Termination s The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Solvent Resistance The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Flammability The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at 25ºC. Pulse Performance © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 100 WP-S Short Pulse Energy Capacity Value (ohms) 0.1 0.1 1 10 100 1000 10000 Energy (joules) WP5S WP4S WP3S WP2S / WPP2R WP1S WP25S WP1S, WP2S, WPP2R, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance. with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there is no multiplier band. WP4S and WP5S resistors are legend marked with type reference, resistance value and tolerance. Marking Compact Flameproof Power Wirewound Resistors 10.24 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

Radial Taped Dimensions (mm) Dimension Notation WPP2R* WP3SR Component body length L 10.0 Max 14.5 Max Component body diameter D 4.0 Max 5.2 Max Terminal lead diameter d 0.8 Nom Component pitch P 12.7±0.5 12.7±1.0 Hole pitch Po 12.7±0.2 12.7±0.3 Component to hole offset Lead pitch F 5.0 Width of backing strip W 18.0±0.3 18.0±1.0 Position of hole W1 9.0±0.25 9.0±0.5 Diameter of hole Do 4.0±0.3 Height to lead form Ho 16.0±0.3 17.0±1.0 Height from lead form Ho1 17.0 Max 23.0 Max Height to resistor Ho2 18.0 Min Width of adhesive tape W0 15.0±0.5 Length of protrusion l <2.5 Form dimensions K1 2.0±0.3 K2 3.0±0.5 K3 1.5±0.25 K4 1.0±0.2 K5 -- 2.0 Min 1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm from the body. 2. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An estimate of the temperature rise to be expected at the center of the body can be calculated using the thermal impedance figures given under Electrical Data. 3. WP-S resistors can also be supplied with radial, goalpost or lancet pre-formed leads. WP2S, WP3S, WP4S and WP5S are also available For details see https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf. in an SMD format with ZI formed leads and packed in blister tape. Application Notes mrof-ZtecnaLtsoplaoGlaidaR Compact Flameproof Power Wirewound Resistors WP-S Series Welwyn Components © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 The standard packaging for WP-S is taped. The critical dimensions are shown in Figure 1. The component wires will not protrude beyond the outside edge of the tapes. Taped product is then packed into boxes or onto reels; see Ordering Procedure for details. Alternative packaging is available by request. Pre-formed resistors are supplied loose packed in plastic bags or boxes. Packaging Dimensions (mm) b c WP1S 52 5 WP2S 52 5 WP25S 52 5 WP3S 67 10 WP4S 63 10 WP5S 63 10 Figure 1 C bf1 f2 Body location f1 - f2 1.4mm< Also a 2W and 3W radial taped version is available as shown below *Although body dimensions differ slightly, WPP2R Performance and Electrical Data are identical to those of WP2S Hairpin Goalpost Lancet ZI-form 3. WP-S resistors can also be supplied with radial, goalpost or lancet pre-formed leads - see https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Application-Note/TN008-Resistors-Leadform-Capability.pdf 10.24 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 WP-S Series Compact Flameproof Power Wirewound Resistors WP2S, WP3S, WP4S and WP5S are also available in an SMD format with ZI formed leads and packed in blister tape - see https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf.

WP-S Series Welwyn Components Example: WP2S at 680 ohms and 5% tolerance in ammo pack box of 2500 pieces - Ordering Procedure © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 Type WP2S – 680R J A25 Value (use IEC 62 code) Tolerance (use IEC 62 code) Packing F 1% G 2% J 5% A5 WP1S 5000/box A25 WP2S 2500/box A15 Ammo WP25S 1500/box A1 WP3S 1000/box Standard A1 WP4S 1000/box T07 Tape WP5S 750/reel5 Ordering Procedure Example: WP2S-680RJA25 (WP2S, 680 ohms ±5%, Pb-free) W P 2 S - 6 8 0 R J A 2 5 1 2 3 4 1 2 3 4 Type Value Tolerance Termination & Packing WP1S 3/4 characters F = ±1% A5 WP1S Pb-free (RoHS) Ammo pack 5000/box WP2S R = ohms G = ±2% A25 WP2S 2500/box WP25S K = kilohms J = ±5% A15 WP25S 1500/box WP3S A1 WP3S, WP4S 1000/box WP4S T075 WP5S Tape & reel 750/reel WP5S PB All sizes SnPb finish Packing as for Pb-free 1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm from the body. 2. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An estimate of the temperature rise to be expected at the center of the body can be calculated using the thermal impedance figures given under Electrical Data. 3. WP-S resistors can also be supplied with radial, goalpost or lancet pre-formed leads. WP2S, WP3S, WP4S and WP5S are also available For details see https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf. in an SMD format with ZI formed leads and packed in blister tape. Application Notes mrof-ZtecnaLtsoplaoGlaidaR Compact Flameproof Power Wirewound Resistors WP-S Series Welwyn Components © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com 08.10 The standard packaging for WP-S is taped. The critical dimensions are shown in Figure 1. The component wires will not protrude beyond the outside edge of the tapes. Taped product is then packed into boxes or onto reels; see Ordering Procedure for details. Alternative packaging is available by request. Pre-formed resistors are supplied loose packed in plastic bags or boxes. Packaging Dimensions (mm) b c WP1S 52 5 WP2S 52 5 WP25S 52 5 WP3S 67 10 WP4S 63 10 WP5S 63 10 Figure 1 C bf1 f2 Body location f1 - f2 1.4mm< EMC REPLACEMENT Example: EMC2-33RMI (EMC2, 33 ohms ±20%, Pb-free) WP-S ADDITIONAL Example: WPP2R-680RJT15 (WPP2R radially formed & taped, 680 ohms ±5%, Pb-free) E M C 2 - 3 3 R M I 1 2 3 4 5 1 2 3 4 5 Type Leadforming Value Tolerance Packing EMC2 Blank = Axial 3/4 characters K = ±10% I EMC2 Ammo 2000/box R = Radial taped R = ohms M = ±20% T15 EMC2R Reel 1500/reel W P P 2 R - 6 8 0 R J T 1 5 1 2 3 4 5 1 2 3 4 5 Type Leadforming Value Tolerance Packing WPP2 R = Radial taped F = ±1% T15 G = ±2% J = ±5% 3/4 characters R = ohms K = kilohms A2 WPP2R Tape & reel Tape & reel Ammo pack 1500/reel 1000/reel 2000/boxWP3SRWP3S 10.24 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 WP-S Series Compact Flameproof Power Wirewound Resistors