1733 Reader's Spreads pg1-203:document 1/27/09 4:11 PM Page 127 PMS 300 neg. Black neg. coat insulated miniature wirewound resistors EU features • • • • • • • Resistors meeting MIL-PRF-26 (U characteristics) High precision resistors with T.C.R. less than ±50x10-6/K Flame retardant coating (Equivalent to UL94 V-0) Automatic insertion is applicable Various types of formings are available Excellent in pulse characteristic Marking: Black body color Precision: Alpha-numeric marking • Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction L Ceramic Core t d D Marking Type L Dimensions inches (mm) t (max.) D d (nom.) CW1H .374±.039 (9.5±1.0) .138±.039 (3.5±1.0) CW2H .472±.039 (12.0±1.0) CW3H .591±.039 (15.0±1.0) l t Resistive Electrode Wire Cap Lead Wire .118 (3.0) .157±.039 (4.0±1.0) .031 (0.8) l 1.18±.118 (30.0±3.0) .236±.039 (6.0±1.0) Insulation Coating ordering information New Part # CW Type 3 Power Rating 1: 1W 2: 2W 3: 3W H Style H: Stability C T521 Termination Material C: SnCu Taping and Forming Axial: T52, T521, T631 Radial: VTP, GT L forming: L12.5A, L15A, L20A, L25A A Packaging A: Ammo R: Reel 10R0 F Nominal Resistance 3 significant figures + 1 multiplier “R” indicates decimal on values <100Ω Tolerance D: ±0.5% F: ±1% For further information on packaging, please refer to Appendix C. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 3/04/08 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 129 resistors CWH 1733 Reader's Spreads pg1-203:document 1/27/09 4:11 PM Page 128 CWH resistors coat insulated miniature wirewound resistors applications and ratings Part Designation T.C.R. (ppm/°C) Max. Power Rating CW1PC 1W CW2PC 2W CW3PC 3W ±20: R≥10Ω ±50: R<10Ω Resistance Range (Ω) E-24, E-96 (D±0.5%) E-24, E-96 (F±1%) 0.47 - 220 0.1 - 430 0.47 - 750 0.1 - 2k 0.47 - 1k 0.1 - 3k Rated Ambient Temperature Operating Temperature Range +25°C -55°C to +275°C environmental applications Derating Curve % Rated Power 100 80 60 40 20 0 -40 0 40 25 160 200 155 Ambient Temperature (°C) 80 120 Performance Characteristics Parameter 240 280 275 Requirement ∆ R ±(% + 0.05Ω) Limit Typical Test Method Within specified tolerance — 25°C Within specified T.C.R. — +25°C/-55°C and +25°C/+125°C Overload (Short Time) ±0.2 ±0.15 Power rating x 5 for 5 seconds Resistance to Solder Heat ±0.2 ±0.15 350°C ± 10°C for 3.5 seconds or 260°C ± 5°C for 10 seconds Endurance @ 70°C ±0.5 ±0.45 25°C, 2000 hours 1.5 hr ON, 0.5 hr OFF cycle Low Temperature ±0.2 ±0.15 -65°C, 24 hours High Temperature ±0.5 ±0.45 +275°C, 250 hours Resistance T.C.R. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 130 3/03/08 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com