CHP_C.qxd 14/5/03 8:16 am Page 1 Metal Glaze™ General Purpose Surface Mount Power Resistors Welwyn Components CHP Series • Up to 2 watts • 0.1 ohm to 2.2 megohm range • Up to 1000 volts • 150°C maximum operating temperature Electrical Data Type Maximum Power Rating (watts) Working Voltage1 (volts) Maximum Voltage (volts) CHP1/8 0.25 @ 70°C 200 400 CHP1/2 0.5 @ 70°C 300 600 CHP1 1 @ 70°C 350 700 2 @ 25°C CHP2 1 2 1.33 @ 70°C 500 1000 Resistance Range2 (ohms) Tolerance (±%)2 TCR (ppm/°C)2 Product Category 0R1 to 0R99 1R0 to 1M 1, 2, 5 100 Low Range 1, 2, 5 50, 100 Standard 20R to 348K 0.25, 0.5 50, 100 Tight Tolerance 0R1 to 0R99 1, 2, 5 100 Low Range 1R0 to 348K 1, 2, 5 50, 100 Standard Low Range 0R1 to 0R99 1, 2, 5 100 1R0 to 2M21 1, 2, 5 50, 100 Standard 20R to 348K 0.25, 0.5 50, 100 Tight Tolerance 0R1 to 0R99 1, 2, 5 100 Low Range 1R0 to 2M21 1, 2, 5 50, 100 Standard Not to exceed √PxR Consult factory for tighter TCR, tolerance or resistance values Performance Characteristics Characteristics Temperature Maximum Change As Specified Test Method MIL-R55342E Par 4.79 (-55°C =125°C) Thermal Shock ±0.5% +0.01 ohm MIL-R55342E Par 4.7.3 (-65°C +150°C, 5 cycles) Low Temperature Operation ±0.25% +0.01 ohm MIL-R-55342E Par 4.7.4 (-65°C @ working voltage) Short Time Overload ±0.5% +0.01 ohm MIL-R-55342E Par 4.7.5 +1% for R>100K ohm 2.5 x √PxR for 5 seconds High Temperature Exposure ±0.5% +0.01 ohm MIL-R-55342E Par 4.7.6 (+150°C for 100 hours) Resistance to Bonding Exposure ±0.25% 0.01 ohm MIL-R-55342E Par 4.7.7 (Reflow soldered to board at 260°C for 10 seconds) Solderability 95% minimum coverage Moisture Resistance ±0.5% +0.01 ohm Life Test ±0.5% +0.01 ohm Terminal Adhesion Strength ±1% +0.01 ohm no mechanical change Resistance to Board Bending ±1% +0.01 ohm MIL-STD-202, Method 208 (245°C for 5 seconds) MIL-R-55342E Par 4.7.8 (10 cycles, total 240 hours) MIL-R-55342E Par 4.7.10 (2000 hour at 70°C intermittent) 1200 gram push from underside of mounted chip for 60 seconds Chip mounted in center of 90mm long board, deflected 5mm so as to exert pull on chip for 10 seconds 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: [email protected] · Website: www.welwyn-tt.com A subsidiary of TT electronics plc Issue C · 05.03 43 CHP_C.qxd 14/5/03 8:16 am Page 2 Metal Glaze™ General Purpose Surface Mount Power Resistors Welwyn Components CHP Series CHP Power Derating Curve CHP Repetitive Surge Curve 1000 100% Peak Power (watts) Percent Relative Power 120% CHP 1/8, 1/2, 1 80% 60% CHP 2 40% 100 CHP 2 CHP 1 CHP 1/2 10 CHP 1/8 20% 0% 30 50 70 90 110 130 1 0.0001 0.0010 0.0100 0.1000 1.0000 150 .1msec Ambient Temperature (oC) 1msec 10msec 100msec 10000msec Surge or pulse duration (seconds) Note: Use for repetitive pulses where the average power dissipation is not to exceed the component rating at 70°C. Surge handling capacity for low-repetitive surges may be significantly greater than shown above. Contact factory for recommendations. Physical Data Size Code CHP1/8 Industry Footprint L Dimensions (mm) W C 1206 3.25±0.18 1.45±0.15 0.51±0.25 CHP1/2 2010 5.08±0.25 2.01±0.15 0.761±0.25 CHP1 2512 6.38±0.25 2.01±0.15 1.02±0.25 CHP2 3610 9.32±0.25 2.67±0.15 1.27±0.25 © 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 44 L C W Issue C · 05.03