Radial Case Resistors Radial Ceramic Ceramic Case Case Resistors Resistors Wirewound ///Metal Wirewound MetalOxide Oxide Metal Oxide SQM Series SQM SQM Series Series 2 to 10 watts 2 to 2Resistance to 10 10 watts watts 0R1 to 200K Resistance 0R1 to Resistance 0R1capability to 200K 200K High overload High overload capability High overload Flameproof casecapability Flameproof case Flameproof case Small PCB footprint Small PCB footprint Small PCB footprint RoHS compliant * * * * * * RoHS RoHS compliant compliant Electrical Electrical Data Data SQM2 SQM2 22 SQM3 SQM3 33 SQM5 SQM5 55 SQM7 SQM7 7 7 SQM10 SQM10 10 10 Wirewound Wirewound 0R1 0R1- -27R 27R 0R1 0R1- 39R - 39R 0R1 - 47R 0R1 - 47R 0R1 - 680R 0R1 - 680R 0R1 - 910R 0R1 - 910R Metal MetalOxide Oxide 30R 30R--33K 33K 43R 43R- -56K 56K 51R - 100K 51R - 100K 750R - 200K 750R - 200K 1K0 - 200K 1K0 - 200K 150 150 50 50 300 300 4545 350 350 3030 500 500 2828 750750 23 23 watts watts Power Power rating rating at at 70C 70C Resistance Resistance range range ohms ohms Limiting Limiting element element voltage voltage Thermal Thermal impedance impedance Isolation Isolation voltage voltage TCR TCR volts voltsdc dcororac acrms rms C /watt C /watt volts volts ppm/C ppm/C Resistance Resistance Tolerance Tolerance Standard Standard Values Values %% Ambient Ambient temperature temperature range range 5 5 E24 E24 -55 to +155C -55 to +155C C C Physical Physical Data Data (all (alldimensions dimensionsininmm, mm,weights weightsining)g) Type Type SQM2 SQM2 SQM3 SQM3 SQM5 SQM5 SQM7 SQM7 SQM10 SQM10 LL 1.0 1.0 20 20 25 25 25 25 38 38 50 50 W W 1.0 1.0 11.5 11.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 1000 1000 <20R: 400, 350 <20R: 400,20R: 20R: 350 DD 1.0 1.0 7.5 7.5 8.5 8.5 99 99 99 PP 1.0 1.0 55 55 55 55 55 dd 0.05 0.05 0.7 0.7 0.7 0.7 0.8 0.8 0.8 0.8 0.8 0.8 Weight Weight Nom. Nom. 4.3 4.3 5.6 5.6 d d WW 6.3 6.3 10.7 10.7 13.4 13.4 P P 5151 DD L L 5151 Leads centered onon SQM2, SQM3, SQM5 Leads centered SQM2, SQM3, SQM5 Leads offset asas shown onon SQM7, SQM10 Leads offset shown SQM7, SQM10 Construction Construction A deposited metal oxide filmfilm A high high purity purity ceramic ceramic rod, rod, with withforce forcefitfitend endcaps capsonto ontowhich whichisiswound wounda awire wireelement: element:orora a deposited metal oxide (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 General Note 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. Allelectronics informationreserves is subject Welwyn's own data and considered accurate without at time of goingortoliability. print. TT theto right to make changes in is product specification All information is subject to Welwyn's own data and is considered accurate at timenotice of going to print. All information is subject to TT electronics' own data and is considered accurate at time of going to print. A subsidiary of A subsidiary TT electronics plc of TT electronics plc (c) www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) Welwyn Welwyn Components ComponentsLimited Limited Bedlington BedlingtonNorthumberland NorthumberlandNE22 NE227AA, 7AA,UK UK Telephone: www.welwyn-tt.com 05 . 08 Telephone: +44 +44 (0) (0) 1670 1670822181 822181 Facsimile: Facsimile:+44 +44(0) (0)1670 1670829465 829465Email: Email:info@welwyn-tt.com info@welwyn-tt.comWebsite: Website: www.welwyn-tt.com 05 . 08 (c) TT electronics plc 09. 11 RadialCeramic Ceramic Case Resistors Radial Case Resistors Wirewound / Metal Oxide Wirewound / Metal Oxide SQMSeries Series SQM Termination Details: Material Solderability Strength The 100% Sn finish copper lead wires are internally welded to the resistance element end caps. The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 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) <100K, 5%; R 100K, 10% See Graph Derating from rated power at 70C Short term overload * R 5% +0.05 Damp heat steady state (56 days, 40C, 90% RH) R 5% +0.05 Temperature rapid change (5 cycles -55C to +155C) R 2% +0.05 Resistance to solder heat R Voltage Proof (1kV for 60s) Solderability * Wirewound: the lower of 5x rated power, or 2.5x LEV for 5s Derating Curve 1% +0.05 No evidence of flashover, mechanical damage, arcing or insulation breakdown Min. 95% coverage Metal Oxide: the lower of 6.25x rated power, or 2.5x LEV for 5s 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 - SQM3-1K2JB3 Type Value (use IEC62 code) Tolerance (use IEC62 code) J 5% Packing B3 B2 B1 Bulk SQM2, 3 SQM5 SQM7, 10 3000 / box 2000 / box 1000 / box Standard General Note TT electronics reserves the right to make changes in product specification without notice or liability. All(c)information subject to TT electronics' data and is considered accurate at7AA, time of WelwynisComponents Limitedown Bedlington Northumberland NE22 UKgoing to print. www.bitechnologies.com www.irctt.com 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 (c) TT electronics plc 09. 11