Through-hole resisT ors Professional Type Metal Film r esistors Miniature style MF0 series FeATures Power Rating 0.4W, 0.6W Resistance Tolerance 0.5%, 1%, 2%, 5%, T.C.R. 50ppm/C, 100ppm/C DerATiNg Cur Ve For resistors operated in ambient temperatures above 70C, power rating must be derated iNTroDuCTioN in accordance with the curve below. The MF0 Series Metal Film Professional 70 155 C Rated Load (%) 100 Resistors are manufactured using a vacuum 80 sputtering system to deposit multiple layers of mixed metal alloys and passivative materials 60 onto a carefully treated high grade ceramic 40 substrate. After a helical groove has been cut 20 in the resistive layer, tinned connecting leads of Ambient Temperature (C) 20 40 60 80 100 120 140 160 electrolytic copper are welded to the end-caps. The resistors are coated with layers of blue color lacquer. DiMeNsioNs Unit: mm sTYle DiMeNsioN Miniature l D h d d MF0204 3.40.3 1.90.2 282.0 0.450.05 H L D MF0207 6.30.5 2.40.2 282.0 0.550.059 Note: eleCTriCAl ChArACTerisTiCs sTYle MF0204 MF0207 Power Rating at 70C 0.4W 0.6W Maximum Working Voltage 250V 350V Maximum Overload Voltage 500V 700V Voltage Proof on Insulation 300V 500V Resistance Range 1 - 4M7 & 0 for E24 & E96 series value Operating Temp. Range -55C to +155C Temperature Coefficient 50ppm/C , 100ppm/C Note: Special value is available on request eNViroNMeNTAl ChArACTerisTiCs Per For MANCe TesT TesT MeTho D APPr Aise Shor t Time Overload IEC 60115-1 4.13 2.5 times RCWV for 5 sec. (Not more than maximum Overload Voltage) 0.25%+0.05 Voltage Proof on Insulation IEC 60115-1 4.7 In V-Block for 60 sec., test voltage as above table No Breakdown Temperature Coefficient IEC 60115-1 4.8 Between -55C to +155C By type Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >10,000M Solderability IEC 60115-1 4.17 2455C for 30.5 Sec. 95% Min. coverage No deterioration of Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic coatings and markings Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads 2.5kg (24.5N) Periodic-pulse Overload IEC 60115-1 4.39 4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off) 1.0%+0.05 Damp Heat Steady State IEC 60115-1 4.24 402C, 90-95% RH for 56 days, loaded with 0.1 times RCWV 1.5%+0.05 Endurance at 70C IEC 60115-1 4.25 702C at RCWV (or Umax., Whichever less) for 1,000 Hr. (1.5Hr.on, 0.5Hr. Off) 1.5%+0.05 Temperature Cycling IEC 60115-1 4.19 -55C Room Temp. +155C Room Temp. (5 cycles) 0.75%+0.05 Resistance to Soldering Heat IEC 60115-1 4.18 2603C for 101 Sec., immersed to a point 30.5mm from the body 0.25%+0.05 Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 2020