leaded resistors MF, MFS, RK general purpose metal film leaded resistor EU features Semi-precision metal film resistors Meets requirements of MIL-R-22684 Suitable for automatic machine insertion MFS two times the power rating of the standard body type Products with lead-free terminations meet EU RoHS and China RoHS requirements AEC-Q200 Qualified: MF1/4, MFS1/4, MFS1/2 Dimensions inches (mm) dimensions and construction Type L (ref.) C (max.) D d (nom.) l* +.02 +.016 .126 .066 L l -.008 .133 -.004 .018 MFS1/4 D Trimming Line Ceramic Core +0.5 +0.4 (3.4) (0.45) (3.2 ) (1.7 ) -0.2 -0.1 d .248.02 .280 .091.012 .024 1.10.118 MF1/4 (6.30.5) (7.1) (2.30.3) (0.6) (28.03.0) .248.02 .280 .091.012 .024 MFS1/2 Marking Resistive End Lead (6.30.5) (7.1) (2.30.3) (0.6) Film Cap Wire +.016 +.012 .138 1.10 Insulation Coating MF1/2C .354.04 .437 -.02 .024 -.016 C +0.4 +3.0 MF1/2D (9.01.0) (11.1) (0.6) (3.5 ) (28.0 ) -0.5 -4.0 .354.04 .437 .138.016 .024/.031 1.10.118 MF1/2L (9.01.0) (11.1) (3.50.4) (0.6)/(0.8) (28.03.0) Derating Curve Surface Temperature Rise +.012 MFS1/2 100 70 1.50 -.016 .610.02 .721 .217.04 .031 60 MF1/2 MF1 +3.0 80 (15.50.5) (18.3) (5.51.0) (0.8) MF1 (38.0 ) 50 MFS1/4 -5.0 60 40 .248.02 .280 .091.012 .024 MF1/4 RK1/4 30 (6.30.5) (7.1) (2.30.3) (0.6) 40 0.94 min. 20 (24.0 min.) .374.04 .437 .138.016 .024 20 RK1/2 10 (9.51.0) (11.1) (3.50.4) (0.6) 0 0 -60 -40 -200420060 80 100 120 140 160 025 50 75 100 -55 70 155 .610.04 .720 .217.02 .031 1.50.118 RK1 Ambient Temperature % Rated Power (15.51.0) (18.3) (5.50.5) (0.8) (38.03.0) (C) * Lead length changes depending on taping and forming. ordering information MF 1/4 L C T52 8 R R20 J Power Termination Taping and Lead Nominal Type T.C.R. Packaging Tolerance Rating Material Forming Diameter Resistance MF 1/4: 0.25W E: 25 C: SnCu 1/4: T26, T52, VT, MF1/2L: T52 A: Ammo +2%: 2 significant B: 0.1% VTP, VTE, MT, figures + 1 multiplier MFS 1/2: 0.50W C: 50 & Bulk Only: R: Reel C: 0.25% M, U, M10, +0.5%,+1%: RK 1: 1W D: 100 6: 0.6mm D: 0.5% M12.5 3 significant figures L: 200 8: 0.8mm F: 1% 1/2: T26, T52, + 1 multiplier G:250 Blank: All G:2% VTP, VTE, R indicates For further information on others sizes B: 350 M12.5, M15 J: 5% decimal on value packaging, please refer to & packaging 1: T521 <100 Appendix C. applications and ratings Minimum Absolute Absolute Resistance Range () Power Operating Part Dielectric T.C.R. Maximum Maximum Rating Temperature Designation Withstanding (ppm/C) Working Overload (B0.1%) (C0.25%) (D0.5%) (F1.0%) (G2.0%) (J5.0%) 70C Range Voltage Voltage Voltage E-96 E-96 E-24 E-192 E-24 E-96 E-24 E-24 -55C MFS1/4C C: 50 49.9 - to 0.25W 300V 10 - 1M 250V 500V 562k MFS1/4D D: 100 +155C Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/19/19 144 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com % Rated Power Temperature Rise (C) MF, MFS, RK general purpose metal film leaded resistor applications and ratings (continued) Minimum Absolute Absolute Resistance Range () Power Operating Part Dielectric T.C.R. Maximum Maximum Rating Temperature Designation Withstanding (ppm/C) (B0.1%) (C0.25%) (D0.5%) (F1.0%) (G2.0%) (J5.0%) Working Overload 70C Range Voltage E-96 E-96 E-24 E-192 E-24 E-96 E-24 E-24 Voltage Voltage MF1/4C C: 50 10- 2.21M 10 - 2.21M MF1/4D 0.25W 500V D: 100 250V 500V 1.0 - 10 0.51 - 10 MF1/4L L: 200 MFS1/2C C: 50 10 - 1M 10 - 2.21M 10 - 2.2M 0.50W 500V 350V 700V MFS1/2D D: 100 10 - 4.99M MF1/2C C: 50 10 - 5.05M 10 - 5.11M MF1/2D 0.50W 700V D: 100 350V 700V 1.0 - 10 0.51 - 10 MF1/2L L: 200 -55C 5.1 - 2.0M 5.1 - 2.49M MF1C C: 50 to 5.1 - 5.11M 1.0 - 6.81M +155C MF1D 1W 700V D: 100 350V 700V 5.1 - 2.0M 5.1 - 2.49M 5.1 - 4.64M 1.0 - 5.11M MF1E E: 25 3.09M - 25M RK1/4D D: 100 RK1/4L 0.25W 500V L: 200 3.3M - 33M 3.3M - 33M 500V 700V 100k - 25M RK1/4B B: 350 100k - 33M 100k - 33M 5.11M - 33M RK1/2D D: 100 RK1/2L 0.50W 700V L: 200 6.2M - 33M 6.2M - 33M 700V 1000V 100k - 35M 100k - 51M 100k - 51M RK1/2B B: 350 100k - 100M 100k - 100M 100k - 51M RK1BC 1W 1000V B: 350 1000V 1500V RK1/2G* 0.50W 700V G: 250 1M - 12M 350V 700V * Discharge path resistor environmental applications Performance Characteristics Requirement R (% + 0.05 ) Parameter Limit Typical Test Method Within specified Resistance 25C tolerance Within specified T.C.R. Room temperature, +100C, RK: +25C/+125C T.C.R. RK: 1%, RK1/2G: 2.5% RK: 0.6%, RK1/2G: 1% Rated voltage x 2.5 or max. overload voltage for 5 seconds, whichever is less Overload (Short Time) MF: 0.5% MF: 0.3% MFS1/2: Rated voltage x 2 or max. overload voltage for 5 seconds, whichever is less RK: 1% RK1/2G: 5% RK: 0.5% RK1/2G: 1% 260C 5C, 10 seconds 1 second or MFS: 0.75% MF1/4, MFS1/4: 0.4% MF1/4, Resistance to Solder Heat 350C 10C, 3.5 seconds 0.5 second MFS1/2, MF1/2: 0.5%, MFS1/2, MF1/2: 0.25% Dielectric Withstanding Voltage No breakdown 1 minute Not less than 10,000M Insulation Resistance 100V, 1 minute RK,MF: 1% MF: 0.3% RK: 0.5%, Rapid Change of Temperature -55C (30 minutes), +155C (30 minutes), 5 cycles RK1/2G: 5% RK1/2G: 1% RK: 5% RK1/2G: 10% RK: 2% RK1/2G: 5% MFS1/4: 1.5% MF1/4, MFS1/4: 1% MF1/4, Moisture Resistance 40C 2C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle MFS1/2, MF1/2: 1% MFS1/2, MF1/2: 0.75% RK: 5% RK1/2G: 10% RK: 2% RK1/2G: 5% Endurance at 70C MFS1/4: 1.5% MF1/4, MFS1/4: 1% MF1/4, 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle MFS1/2, MF1/2: 1% MFS1/2, MF1/2: 0.75% No abnormality in appearance. Marking Resistance to Solvent The resistor shall be immersed for 5 seconds in IPA shall be easily legible No such abnormalities Discharge from 1000pF capacitor 50 pulses. Internal 2.5 seconds. as short-circuit, burnout, Impulse Charge voltage: 1.25kV (RK1/4), 2.5kV (RK1/2) and 6kV (RK1) breakdown, etc. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/19/19 KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 145 leaded resistors