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M F, M FS, R K general purpose m etal film leaded resistor dim ensions and construction Ceramic Core d D Marking Resistive Film Insulation Coating Trimming Line End Cap Lead Wire L l C L (ref.) M F 1/4 .248±.02 (6.3± 0.5) .280 (7.1) .09 1±.012 (2.3± 0.3) .024 (0.6) 1.10±.118 (28.0± 3.0) .024 (0.6) .138±.016 (3.5± 0.4) .437 (11.1) .354±0.4 (9.0± 1.0) M F 1/2 Type C (m ax.) D d (nom .) l* Dim ensions inches (m m ) 1/4: T26, T52, V T, V TP, V TE , M T, M , U , M 10, M 12.5 1/2: T26, T52, V TP, V TE , M 12.5, M 15 1: T521 ordering inform ation +2%: 2 signifi - ca nt figures + 1 m ultiplier +0.5%,+1%: 3 significa nt figures + 1 m ultiplier “R” indica tes decim a l on va lue <100 Ω 1/4: 0.25W 1/2: 0.50W 1: 1W C : S nC u B: ±0.1% C : ±0.25% D : ±0.5% F: ±1% G : ±2% J: ±5% M F 1/4 C Term ination M aterial Type Pow er R ating N om inal R esistance Tolerance Taping and F orm ing N ew Part # T52 R 20 A : A m m o R: Reel Packaging R J For further inform a tion on pa cka ging, plea se refer to A ppendix C . E : ±25 C : ±50 D : ±100 L: ±200 G : ±250 B: ±350 T.C.R . L M F S1/4 .126±.008 (3.2± 0.2) .133 (3.4) .018 (0.45) .024 (0.6) .09 1±.012 (2.3± 0.3) .280 (7.1) .248±.02 .066 +.007 -.004 (1.7 + 0.2 )-0.1 .031 (0.8) 1.50±.118 (38.0± 3.0) 1.50±.118 (38.0± 3.0) .217±.02 (5.5± 0.5) .721 (18.3) .610±.02 (15.5± 0.5) M F 1 EU R K1/4 .248±.02 (6.3± 0.5) .280 (7.1) .09 1±.012 (2.3± 0.3) .024 (0.6) .024 (0.6) .138±.016 (3.5± 0.4) .437 (11.1) .374±.04 (9.5± 1.0) R K1/2 .031 (0.8) .217±.02 (5.5± 0.5) .720 (18.3) .610±.04 (15.5± 1.0) R K1 0.9 4 m in. (24.0 m in.) Absolute M axim um O verload V oltage Absolute M axim um W orking V oltage Part Designation Pow er R ating @ 70°C applications and ratings M inim um Dielectric W ithstanding V oltage T.C.R . (ppm /°C) R esistance R ange ( Ω) (B±0.1% ) E-96 (C±0.25% ) E-96 (D±0.5% ) E-24 E-192 (F ±1.0% ) E-24 E-96 O perating Tem perature R ange (G ±2.0% ) E-24 (J±5.0% ) E-24 M F S1/4C M F S1/4D 0.25W 49 .9 - 562k 10 - 1M D : ±100 C : ±50 300V ——— — 250V 300V -55°C to +155°C Derating Curve % Rated Power 100 -60 -40 0 4 06 08 0 1001 60 Ambient Temperature (°C) -55 120 155 -20 1 40 Surface Tem perature R ise Te mperature Rise (°C) 0 2 5 5 0 7 5 % Rated Po we r 100 MFS1/2 MF1/2 MF1/4 MFS1/4 MF1 * Lea d length cha nges depending on ta ping a nd form ing. 109 K O A S peer E lectronics, Inc. • 199 Bolivar D rive • Bradford, P A 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.koaspeer.com Specifications given herein m ay be changed at any tim e w ithout prior notice. Please confirm technical specifications before you order and/or use. 12/18/12 resistors

  • S em i-precision m eta l film resistors
  • The discha rge pa th resistor is recognized by U L 1676 a nd c-U L (C A S -C 22.2 N o.1-M 9 4). (File N o. E 159 326) (RK only)
  • M eets requirem ents of M IL-R-22684
  • S uita ble for a utom a tic m a chine insertion
  • M FS tw o tim es the pow er ra ting of the sta nda rd body type
  • M a rking: Blue-gra y body color w ith color-coded ba nds
  • Products w ith lea d-free term ina tions m eet E U RoHS a nd C hina RoHS requirem ents
  • A E C -Q 200 Q ua lified: M F1/4, M FS 1/4, M FS 1/2

110 K O A S peer E lectronics, Inc. • 199 Bolivar D rive • Bradford, P A 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.koaspeer.com Specifications given herein m ay be changed at any tim e w ithout prior notice. Please confirm technical specifications before you order and/or use. 2/01/11 resistors M F, M FS, R K general purpose m etal film leaded resistor Perform ance Characteristics environm ental applications Absolute M axim um O verload V oltage Absolute M axim um W orking V oltage Part Designation Pow er R ating @ 70°C applications and ratings (continued) M inim um Dielectric W ithstanding V oltage M F 1/4C M F 1/4D M F 1/2D M F 1/2C M F 1D M F 1C M F 1E 0.25W 0.50W 10- 2.21M 10 - 5.05M 10 - 5.11M 47.5 - 4.64M 47.5 - 5.11M 1.0 - 6.81M 10 - 4.9 9 M 10 - 5.11M 10 - 2.21M 47.5 - 1.0M 47.5 - 2.49 M 47.5 - 1.0M 47.5 - 2.49 M D : ±100 C : ±50 C : ±50 D : ±100 E : ±25 C : ±50 D : ±100 700V 500V 250V 350V 500V 700V T.C.R . (ppm /°C) R esistance R ange ( Ω) (B±0.1% ) E-96 (C±0.25% ) E-96 (D±0.5% ) E-24 E-192 (F ±1.0% ) E-24 E-96 O perating Tem perature R ange -55°C to +155°C (G ±2.0% ) E-24 (J±5.0% ) E-24 M F 1/2L — 1.0 - 10 L: ±200 0.51 - 10 Ω—— 350V 700V 700V M F S1/2D M F S1/2C 10 - 1M 10 - 2.21M —— C : ±50 D : ±100 500V 0.50W 350V 700V 10 - 2.2M — R K1/2D 0.50W 5.11M - 33M ——— L: ±200 L: ±200 D : ±100 — 3.3M - 33M 3.3M - 33M 700V 1000V 700V 0.25W 500V 500V 700V 6.2M - 33M 6.2M - 33M R K1/4L — 100k - 25M ——B: ±350 100k - 33M 100k - 33M R K1/4B R K1/2L R K1BC 1W 100k - 51M G : ±250 B: ±350 100k - 100M 100k - 100M 1000V 1500V 1000V 0.50W 350V 700V 700V — — 1M - 12M — 100k - 35M ——B: ±350 100k - 51M 100k - 51M R K1/2B R K1/2G * * D ischa rge pa th resistor Param eter R equirem ent ∆ R ±(% + 0.05 Ω) Lim it Typical Test M ethod Resista nce T.C .R. 25°C Room tem pera ture, +100°C W ithin specified tolera nce W ithin specified T.C .R. O verloa d (S hort Tim e) Ra ted volta ge x 2.5 or m a x. overloa d volta ge for 5 seconds, w hichever is less; M FS1/2: Rated voltage x 2 or m ax. overload voltage for 5 seconds, w hichever is less M F: ±0.5% M F: ±0.3% Resista nce to S older Hea t 260°C ± 5°C , 10 seconds ± 1 second or 350°C ± 10°C , 3.5 seconds ± 0.5 second D ielectric W ithsta nding V olta ge 1 m inute N o brea kdow n — Insula tion Resista nce 100V , 1 m inute N ot less than 10,000M Ω — Ra pid C ha nge of Tem pera ture -55°C (30 m inutes), +155°C (30 m inutes), 5 cycles RK1/2G : ±1% M oisture Resista nce 40°C ± 2°C , 9 0 - 9 5% RH, 1000 hours, 1.5 hr O N , 0.5 hr O FF cycle M FS1/2, M F1/2: ±1% E ndura nce a t 70°C 70°C ± 2°C , 1000 hours, 1.5 hr O N , 0.5 hr O FF cycle M FS1/2, M F1/2: ±1% Resista nce to S olvent The resistor sha ll be im m ersed for 5 seconds in IPA N o abnorm ality in appearance. M arking shall be easily legible Im pulse D ischa rge from 1000pF ca pa citor 50 pulses. Interna l 2.5 seconds. C ha rge volta ge: 1.25kV (RK1/4), 2.5kV (RK1/2) a nd 6kV (RK1) N o such abnorm alities as short-circuit, burnout, breakdown, etc.