PPS-1_C.qxd 28/4/03 10:06 am Page 1 Metal GlazeTM Power Pack Surface Mount High Power Density Ceramic Package Welwyn Components PPS-1 Series * * * * * * * * 1 watt performance, standard 2010 footprint Flat ceramic package 0R1 to 348K range Low inductance Superior surge handling capability 150C maximum operating temperature Flameproof Ceramic package provides superior temperature rise profile Electrical Data PPS-1 Industry footprint 2010 Maximum power rating at 70C Working voltage 1 watts 1 volts 350 Maximum voltage volts 700 Resistance range ohms 0.1 to 0.99 1.0 to 348K %2 Tolerance 1, 2, 5 1, 2, 5 ppm/C2 TCR 100 50, 100 1 2 Not to exceed (PxR)1/2 Consult factory for tighter tolerance or TCR PPS-1 Applications The PPS-1 will dissipate 1 watt at 70C on a 2010 footprint. The PPS-1 is recommended for applications where board real estate or component/board TCE mismatch is a major concern. It is also recommended in circuits where a standard 2010 resistor exhibits marginal or unacceptable performance due to high power density/surge handling demands. Physical Data Dimensions (mm) PPS-1 a b c d e f 4.32 0.25 3.30 0.13 2.01 0.15 5.08 0.25 3.30 0.13 2.67 0.13 Top view Side view a e f b c d 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. (c) 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 A subsidiary of TT electronics plc Issue C * 04.03 49 PPS-1_C.qxd 28/4/03 10:06 am Page 2 Metal GlazeTM Power Pack Surface Mount High Power Density Ceramic Package Welwyn Components PPS-1 Series Performance Data Test Method Temperature coefficient As specified above MIL-R-55342E Par 4.7.3 (-65C +150C, 5 cycles) (0.5% +0.01 ohm) MIL-R-55342E Par 4.7.4 (-65C @ working voltage) (0.25% +0.01 ohm) MIL-R55342E Par 4.7.5 (2.5 x (PxR)1/2) (1.0% +0.01 ohm) High temperature exposure MIL-R55342E Par 4.7.6 (+150C for 100 hours) (0.5% +0.01 ohm) Resistance to bonding exposure MIL-R55342E Par 4.7.7 (Reflow soldered to board at 260C for 10 sec.) (0.5% +0.01 ohm) MIL-STD-202, Method 208 (245C for 5 seconds) 95% minimum coverage MIL-R55342E Par 4.7.8 (10 cycles, total 2240 hours) (0.5% +0.01 ohm) MIL-R55342E Par 4.7.10 (2000 hours at 70C intermittent (1.0% +0.01 ohm) 1200 gram push from underside of mounted chip for 60 seconds (1% +0.01 ohm) Chip mounted in centre of 90mm long board deflected 5mm so as to extent pull on chip contacts for 10 seconds +(1% +0.01 ohm) Thermal Shock Low temperature Short time overload Solderability Moisture resistance Life test Terminal adhesion strength Resistance to board bending (c) 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 50 Maximum Change MIL-R-55342E Par 4.7.9 (-55C +125C) Issue C * 04.03