for further information on packaging, please refer to appendix c. cw , cwp coat insulated, precision coat insulated miniature wirewound leaded resistors features ? flameproof silicone coating (ul94v0) ? suitable for automatic machine insertion ? marking: blue-gray body color with color-coded bands precision: color-coded bands and alpha-numeric black marking ? products with lead-free terminations meet eu rohs and china rohs requirements axial: t26, t52, t521, t631 stand-off axial: l52a, l52b radial: vtp, gt l forming ordering information 2%, 5%: 2 significant figures + 1 multiplier r indicates decimal on value <10 1%: 3 significant figures + 1 multiplier r indicates decimal on value <100 1/4: 0.25w 1/2: 0.5w 1: 1w 2: 2w 3: 3w 5: 5w nil: power p: precision s: small x: power c: sncu (other termination styles available, contact factory for options) c: 0.25% d: 0.5% f: 1% g: 2% j: 5% k: 10% cw 1/2 p c style type power rating nominal resistance tolerance termination material taping and forming new part # t52 103 a: ammo r: reel packaging a f dimensions and construction d d marking insulation coating end cap lead wire l l t t ceramic core resistive wire l cw1/4 .13.012 (3.3?.3) .02 (0.5) .075.012 (1.9?.3) .018 (0.45) .024 (0.6) .031 (0.8) 1.18.118 (30.0?.0) 1.50.118 (38.0?.0) .098.039 (2.5 1.0) .138.039 (3.5 1.0) .157.039 (4.0 1.0) .236.039 (6.0 1.0) .354.039 (9.0 1.5) .039 (1.0) .118 (3.0) .256.039 (6.5 1.0) .945.059 (24.0 1.5) cw1/2 cw1 cw2 cw3 cw5 type t (max.) d d (nom.) l dimensions inches (mm) .138 +.039 -0 (3.5 +1.5 ) -0 .374.039 (9.5 1.0) cw1x .138.039 (3.5 1.0) cw1p .157 +.039 -0 (4.0 +1.5 ) -0 .472.039 (12.0 1.0) cw2x .157.039 (4.0 1.0) cw2p .236 +.039 -0 (6.0 +1.5 ) -0 .591.039 (15.0 1.0) cw3x .236.039 (6.0 1.0) cw3p 1.18.118 (30.0?.0) .098.039 (2.5 1.0) .256.039 (6.5 1.0) cw1s .039 (1.0) .024 (0.6) eu 127 koa speer electronics, inc. ? bolivar drive ? p.o. box 547 ? bradford, pa 16701 ? usa ? 814-362-5536 ? fax: 814-362-8883 ? www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. 2/11/08 resistors
128 koa speer electronics, inc. ? bolivar drive ? p.o. box 547 ? bradford, pa 16701 ? usa ? 814-362-5536 ? fax: 814-362-8883 ? www.koaspeer.com specifications given herein may be changed at any time without prior notice. please confirm technical specifications before you order and/or use. 12/28/05 resistors cw , cwp coat insulated, precision coat insulated miniature wirewound leaded resistors part designation rated ambient temperature power rating applications and ratings t.c.r. (ppm/?) max. cw1/4 cw1/2 cw1 cw1p cw2 cw2p cw3 cw3p cw5 0.25w 0.5w 1.0w 2.0w 3.0w 1.0w 2.0w 3.0w 5.0w 250 +25c +70c 90: r 10 * 50: r<10 operating temperature range -40c to +155c 1 - 100 1 - 430 1 - 620 0.47 - 220 0.47 - 750 0.47 - 1k 0.1 - 430 0.1 - 430 0.47 - 15 0.1 - 100 0.1 - 2k 0.1 - 3k 0.1 - 4.7k 0.1 - 430 0.1 - 2k 0.1 - 3k 0.1 - 4.7k 0.1 - 2k 0.1 - 3k e-24, e-96 (c?.25%) e-24, e-96 (d?.5%) e-24, e-96 (f?%) e-24 (g?%) e-24 (j?%) resistance range ( ) derating curve environmental applications % rated power 100 80 60 40 20 -40 0 40 80 120 280 ambient temperature ( c) 0 70 160 275 200 240 155 cw % rated power 100 80 60 40 20 -40 0 40 80 120 280 ambient temperature ( c) 0 25 160 275 200 240 155 cwp surface temperature rise temperature rise ( c) 300 250 200 150 0255075 % rated power 0 100 50 cw1/4 100 cw1/2 cw1, cw1p cw2, cw2p cw3, cw3p cw5 resistance t.c.r. 25c cw: room temperature/100c up cwp: +25c/-40c and +25c/+155c within regulated tolerance 250ppm/c: cw 90, 20ppm/c: cwp, r 10 50ppm/c: cwp, r<10 performance characteristics parameter requirement r ?% + 0.05 ) limit typical test method overload cw: power rating x 10 for 5 seconds cwp: power rating x 6.25 for 5 seconds 1: cw 0.5: cwp 0.8: cw 0.4: cwp resistance to solder heat 350c 10c for 3.5 seconds or 260c 5c for 10 seconds 1: cw 0.5: cwp 0.8: cw 0.4: cwp moisture resistance power rating x 1/10, 40c, 90 - 95% rh, 1000 hours, 1.5 hr on, 0.5 hr off cycle 5: cw 2: cwp 4: cw 1.6: cwp endurance @ 70c 70c, 1000 hours (cw), 25c, 1000 hours (cwp) 1.5 hr on, 0.5 hr off cycle 5: cw 2: cwp 4: cw 1.6: cwp resistance to solvent after immersing the sample in ipa for 3 min., the resistor surface should be wiped with a dry cloth (velvet or gauze) no evidence of damage to protective coating and marking * t.c.r. = 20ppm/c available on request 0.47 - 15 0.1 - 100 e-24 (k?0%) cw1x cw2x cw3x cw1s 1.0w 2.0w 3.0w 1.0w 500 0.01 - 0.091 0.01 - 0.091 0.01 - 0.091 0.1 - 100 0.01 - 0.091 0.01 - 0.091 0.01 - 0.091 0.1 - 100 250
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