Ceramic Case Resistors Resisters – Wirewound / Metal Oxide Welwyn Components 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 2 3 5 7 10 15 20 Wirewound 0R1-50R 0R1100R 0R1100R 0R1-100R (7 & 7S) 0R1200R 0R1200R 0R1500R Metal Oxide (Ohms) 51R47K 100R47K 110R47K 110R-47K (7 Only) 220R68K 220R68K 510R100K volts dc or ac rms 150 300 350 500 (7S-350) 750 1000 1000 ˚ C/watt 50 45 30 28 23 16 13 Power rating at 70˚ C Resistance range watts Limiting element voltage Thermal impedance Isolation voltage volts TCR ppm/˚ C Resistance Tolerance 1000 WW types, <0R68, 1700ppm; 0R68, 200ppm: MO types all values 350ppm % 5(J) Standard Values E24 preferred Ambient temperature range ˚C -55 to +155˚ C * Other styles (radial/pluggable); sizes, and 30, 40, 50 W types are available to special order. Physical Data Type L Max W Max H Max d Nom Weight gm 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 SQP5 22.5 10 10 0.75 5.0 SQP7 36.0 10 10 0.75 8.2 SQP7S 26.0 10 10 0.75 6.0 SQP10 50.0 10 10 0.75 11.0 SQP15 50.0 13.5 13.5 0.75 17.4 SQP20 61.0 14.5 14.5 0.75 25.0 d nom ± 0.05 H W 35 ± 1.0 L 35 ± 1.0 Min bend radius, all types 1.6 mm 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. All information is subject to Welwyn’s own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 70 Issue Issue D C ·· 01.07 07.06 Ceramic Case Resisters 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 70˚C) R% 5% +0.05 Derating from rated power at 70˚ C See Graph Short term overload * R% 2% +0.05 R% 2% +0.05 Temperature rapid change R% 2% +0.05 Resistance to solder heat R% Damp heat steady state (56 days, 40˚C, 90% RH) 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% Metal Oxide types Wirewound types 50% 50% 0% -30 T˚C 25 70 155 240 T˚C 0% -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 Example: 5,000 SQP3 at 1.2 kilohms and 5% tolerance in standard bulk pack optionModel SQP3 – 1K2 J B5 B10 CODE Family Value (use IEC62 code) Tolerance (use IEC62 code) J 5% Packing B5 B15 SQP2,3,5 Bulk Pack B1 © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Qty/ Carton 5000 SQP7,10 1500 SQP15,20 1000 Issue 01.07 Issue D C · 07.06 71