Resistors Radial Ceramic Case Resistors Radial Ceramic Case Resistors Make Possible Wirewound / Metal Oxide Wirewound / Metal Oxide Radial Ceramic Case Resistors Wirewound / Metal Oxide SQM Series SQM Series 2 to 10 watts SQM / CVF / CVW Series 2 to 10 watts Resistance 0R1 to 200K Resistance 0R1 to 200K 2 to 10 watts High overload capability High overload capability Resistance 0R1 to 200K Flameproof case Flameproof case High overload capability Small PCB footprint Small PCB footprint Flameproof case RoHS compliant RoHS compliantSmall PCB footprint RoHS compliant All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) Electrical Data Electrical Data SQM2 / CV-2 SQM3 / CV-3 SQM5 / CV-5 SQM7 / CV-7 SQM10 / CV-10 SQM2 / CV-2 SQM3 / CV-3 SQM5 / CV-5 SQM7 / CV-7 SQM10 / CV-10 Power rating at 70C watts 2 3 5 7 10 watts 2 3 5 7 10 Power rating at 70C ohms Resistance range wirewound (CVW) 0R1 - 27R 0R1 - 39R 0R1 - 47R 0R1 - 680R 0R1 - 910R ohms Resistance range wirewound (CVW) / CV-2 0R1 - 27R 0R1 - 39R 0R1 - 47R 0R1 - 680R 0R1 - 910R / CV-2 Resistance range oxide (CVF) ohms 30R 33K 43R 56K 51R 100K 750R - 200K 1K0 - 200K Resistance range oxide (CVF) ohms 30R 33K 43R 56K 51R 100K 750R - 200K 1K0 - 200K Limiting element voltage volts dc or ac rms 150 300 350 500 750 Limiting element voltage volts dc or ac rms 150 300 350 500 750 Thermal impedance C /watt 50 45 30 28 23 Thermal impedance 50 45 30 28 23 C /watt Isolation voltage volts 1000 Isolation voltage volts 1000 TCR ppm/C <20R: 400, 20R: 350 TCR ppm/C <20R: 400, 20R: 350 Resistance Tolerance % 5 10 Resistance Tolerance % 5 10 Standard Values E24 Standard Values E24 Ambient temperature range -55 to +155C C Ambient temperature range C -55 to +155C Physical Data (all dimensions in mm, weights in g) P hysical Data (all dimensions in mm, weights in g) L W D B E F P d We ight L W D B E F P d We ight Type Type 1.0 1.0 B 1 .0 1.0 1.0 1.0 1 .0 0.05 Nom. d B 1 .0 1.0 1.0 1.0 1.0 1.0 Nom. F 1 .0 0.05 d F SQM2 / CV-2 20 11.5 7.5 4.5 3.0 3.0 5 0.7 4.3 SQM2 / CV-2 20 11.5 7.5 4.5 3.0 3.0 5 0.7 4.3 W P P / CV-3 4.5 4.0 4.0 W SQM3 25 12.5 8.5 5 0.7 5.6 SQM3 / CV-3 25 12.5 8.5 4.5 4.0 4.0 5 0.7 5.6 SQM5 / CV-5 25 12.5 9 5.0 3.5 3.5 5 0.8 6.3 E SQM5 / CV-5 25 12.5 9 5.0 3.5 3.5 5 0.8 6.3 E D L 51 D L 51 SQM7 / CV-7 38 12.5 9 5.0 2.75 5.0 5 0.8 10.7 SQM7 / CV-7 38 12.5 9 5.0 2.75 5.0 5 0.8 10.7 Marked side Marked side SQM10/ CV-10 50 12.5 9 4.25 2.75 5.0 5 0.8 13.4 SQM10/ CV-10 50 12.5 9 4.25 2.75 5.0 5 0.8 13.4 Construction Construction A high purity ceramic rod, with force fit end caps onto which is wound a wire element: or a deposited metal oxide film A high purity ceramic rod, with force fit end caps onto which is wound a wire element: or a deposited metal oxide film (depending on value). The element is fitted into a ceramic case with fireproof insulation cement. (depending on value). The element is fitted into a ceramic case with fireproof insulation cement. General Note General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc TT electronics plc All information is subject to TT Electronics own data and is considered accurate at time of going to print. Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK www.ttelectronicsresistors.com 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 05 . 08 Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 05 . 08 TT Electronics plc 09.14Radial Ceramic Case Resistors Radial Ceramic Case Resistors Wirewound / Metal Oxide Wirewound / Metal Oxide Make Possible SQM Series SQM / CVF / CVW Series Termination Details: Material The 100% Sn finish copper lead wires are internally welded to the resistance element end caps. Solderability The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Strength The terminations meet the requirements of IEC 86.2.21 Marking: Type reference, resistance value and tolerance are legend marked onto the upper surface. 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 70C) R <100K: 5% 100K: 10% See Graph Derating from rated power at 70C short term overload (lesser of 6.25 x Pr or 2.5 x LEV for 5s) R 5% +0.05 5% +0.05 Damp heat steady state (56 days, 40C, 90% RH) R Temperature rapid change (5 cycles -55C to +155C) R 2% +0.05 Resistance to solder heat R 1% +0.05 No evidence of flashover, mechanical damage, Voltage Proof (1kV for 60s) arcing or insulation breakdown Solderability Min. 95% coverage Derating Curve P/Pr 100% 60% 0% -55 70 155 275 T (C) Ordering Procedure Example: SQM3 at 1.2 kilohms and 5% tolerance bulk packed in a box of 3000 pieces S Q M 3 1 K 2 J B 3 Type Value (use IEC62 code) Tolerance (use IEC62 code) J 5% Packing B3 SQM2, 3 3000 / box B2 Bulk SQM5 2000 / box Standard B1 SQM7, 10 1000 / box General Note TT Electronics reserves the right to make changes in product specification without notice or liability. Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK All information is subject to TT Electronics own data and is considered accurate at time of going to print. Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 05 . 08 www.ttelectronicsresistors.com TT Electronics plc 09.14