Ceramic Case Resisters Welwyn Components Wirewound / Metal Oxide SQP Series 2 watts to 20 watts* Resistance 0R1 to 100K High overload capability RoHS compliant Electrical Data SQP2 SQP3 SQP5 SQP7/7S SQP10 SQP15 SQP20 Power rating at 70C watts 2 3 5 7 10 15 20 Resistance range Wirewound 0R1-50R 0R1- 0R1- 0R1-100R 0R1- 0R1- 0R1- 100R 100R (7 & 7S) 200R 200R 500R Metal Oxide 51R- 100R- 110R- 110R-47K 220R- 220R- 510R- (Ohms) 47K 47K 47K (7 Only) 68K 68K 100K Limiting element voltage volts dc or ac rms 150 300 350 500 (7S-350) 750 1000 1000 Thermal impedance C/watt 50 45 30 28 23 16 13 Isolation voltage volts 1000 TCR ppm/C WW types, <0R68, 1700ppm 0R68, 200ppm: MO types all values 350ppm Resistance Tolerance % 5(J) Standard Values E24 preferred Ambient temperature range C -55 to +155C * Other styles (radial/pluggable) sizes, and 30, 40, 50 W types are available to special order. Physical Data Type L W H d Weight Max Max Max Nom gm d nom 0.05 SQP2 18.5 7.5 7.5 0.75 2.2 SQP3 22.5 8.5 8.5 0.75 3.5 SQP4 22.5 10 10 0.75 5.0 H SQP5 22.5 10 10 0.75 5.0 SQP7 36.0 10 10 0.75 8.2 W SQP7S 26.0 10 10 0.75 6.0 35 1.0 L 35 1.0 SQP10 50.0 10 10 0.75 11.0 Min bend radius, all types 1.6 mm SQP15 50.0 13.5 13.5 0.75 17.4 SQP20 61.0 14.5 14.5 0.75 25.0 Packaging Our standard packaging for SQP Series is bulk pack - resistors are supplied loose packed in plastic bags or boxes.Quantities/ bag, box, carton: SQP2, 3: 50/bag, 500/box, 5000/carton :: SQP5: 140/box, 1400 carton SQP7,10:150/box,1500/carton :: SQP15,20:100/box, 1000/carton General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of All information is subject to Welwyns own data and is considered accurate at time of going to print. TT electronics plc 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 Issue C 07.06 70Ceramic Case Resistors Wirewound / Metal Oxide Welwyn Components SQP Series Construction 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. Termination Details Material The tinned 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 Performance Data Maximum Load at rated power (1000hrs at 70C) R% 5% +0.05 Derating from rated power at 70C See Graph Short term overload * R% 2% +0.05 Damp heat steady state (56 days, 40C, 90% RH) R% 2% +0.05 Temperature rapid change R% 2% +0.05 Resistance to solder heat R% 1% +0.05 Pulse handling Data available by request *(Wirewound:: the lower of 5x rated power, or 2.5x LEV for 5 secs. Metal Oxide:: the lower of 6.25x rated power, or 2.5x LEV for 5 secs) P P 118% 100% 100% Wirewound types Metal Oxide types 50% 50% TC TC 0% 0% -30 25 70 155 240 -30 70 155 240 Marking Type reference, resistance value and tolerance are legend marked onto the upper surface. Flammability The resistor will not burn or emit incandescent particles 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. Ordering Procedure (Note that MOQs apply) Example: 10,000 SQP3 at 1.2 kilohms and 5% tolerance in standard bulk pack option- Ordering Procedure (Note that MOQs apply) Example: 10,000 SQP3 at 1.2 kilohms and 5% tolerance in standard bulk pack option- CODE Family Qty/ Model SQP3 1K2 J B10 Carton B5 SQP2,3 5000 Value (use IEC62 code) Bulk Tolerance (use IEC62 code) B14 SQP5 1400 J 5% B15 Pack SQP7,10 1500 Packing B1 SQP15,20 1000 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 Issue C 07.06 71