RK1LCT521RR20C

1733 Reader's Spreads pg1-203:document 1/27/09 4:08 PM Page 97 MF, MFS, RK general purpose metal film leaded resistor EU features • Semi-precision metal film resistors • The discharge path resistor is recognized by UL 1676 and c-UL (CAS-C22.2 No.1-M94). (File No. E159326) (RK only) • Meets requirements of MIL-R-22684 • Suitable for automatic machine insertion • MFS two times the power rating of the standard body type • Marking: Blue-gray body color with color-coded bands • Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction L D Trimming Line Ceramic Core d l Type MFS1/4 L (ref.) .126±.008 (3.2±0.2) .248±.02 (6.3±0.5) .248±.02 (6.3±0.5) .374±.04 (9.5±1.0) .610±.02 (15.5±0.5) .248±.02 (6.3±0.5) .374±.04 (9.5±1.0) .610±.04 (15.5±1.0) Dimensions inches (mm) C (max.) D d (nom.) .133 (3.4) .280 (7.1) .280 (7.1) .437 (11.1) .721 (18.3) .280 (7.1) .437 (11.1) .720 (18.3) .066 (1.7 +.007 -.004 +0.2) -0.1 l .018 (0.45) .024 (0.6) .024 (0.6) .024 (0.6) .031 (0.8) .024 (0.6) .031 (0.8) .031 (0.8) 1.50±.118 (38.0±3.0) 0.94 min. (24.0 min.) 1.50±.118 (38.0±3.0) 1.18±.118 (30.0±3.0) Marking Resistive Film End Cap Lead Wire MF1/4 MFS1/2 Insulation Coating C .091±.012 (2.3±0.3) .091±.012 (2.3±0.3) .138±.016 (3.5±0.4) .217±.02 (5.5±0.5) .091±.012 (2.3±0.3) .138±.016 (3.5±0.4) .217±.02 (5.5±0.5) Derating Curve 100 80 % Rated Power 60 40 20 0 -60 -40 -20 -55 Surface Temperature Rise 70 Temperature Rise (°C) 60 50 40 30 20 10 0 0 25 50 75 100 MF1/2 MFS1/2,MF1/4, MF1/2 (+2%&+5%) MF1/4 MF1 MFS1/4 MF1/2 MF1 RK1/4 RK1/2 RK1 0 20 40 60 80 100 120 140 160 70 155 Ambient Temperature (°C) % Rated Power ordering information New Part # MF Type MF MFS RK 1/4 Power Rating 1/4: 0.25W 1/2: 0.50W 1: 1W L T.C.R. E: ±25 C: ±50 D: ±100 L: ±200 G: ±250 B: ±350 C Termination Material C: SnCu T52 Taping and Forming 1/4: T26, T52, VT, VTP, VTE, MT, M, U, M10, M25 1/2: T26, T52, VTP, VTE, M12.5, M15 1: T521 R Packaging A: Ammo R: Reel R20 Nominal Resistance +2%: 2 significant figures + 1 multiplier +0.5%,+1%: 3 significant figures + 1 multiplier “R” indicates decimal on value