fe atures power rating 1/6w, 1/4w, 1/2w, 1w, 2w, 3w resistance tolerance 0.5%, 1%, 5% t.c.r. 15ppm/c, 25ppm/c, 50ppm/c, 100ppm/c der ating cur ve for resistors operated in ambient temperatures above 70c, power rating must be derated in accordance with the curve below. rated load (%) ambient temperature (c) 160 140 120 100 80 60 40 100 80 60 40 20 20 70 155 c dimensions unit: mm s ty le d i m e n sio n normal miniature l ?d h ?d mfr-12 mfr25s 3.40.3 1.90.2 282.0 0.450.05 mfr-25 mfr50s 6.30.5 2.40.2 282.0 0.550.05 mfr-50 mfr1ws 9.00.5 3.30.3 262.0 0.550.05 mfr100 mfr2ws 11.51.0 4.50.5 352.0 0.80.05 MFR200 mfr3ws 15.51.0 5.00.5 332.0 0.80.05 int roduction the mfr series metal film resistors are manufactured using a vacuum sputtering system to deposit multiple layers of mixed metal alloys and passivative materials onto a carefully treated high grade ceramic substrate. after a helical groove has been cut in the resistive layer, tinned connecting leads of electrolytic copper are welded to the end-caps. the resistors are coated with layers of blue color lacquer. metal film resistors general type normal & miniature style [ mfr series ] ?d h l ?d through-hole resis t ors
5 electrical char acteristics s ty le mf r -12 mf r 25 s mf r -25 mf r 50 s mf r -50 mf r 1w s mf r 100 mf r 2w s mf r 200 mf r 3w s power rating at 70c 1/6w 1/4w 1/2w 1w 2w 3w maximum working voltage 200v 250v 300v 350v 400v 500v maximum overload voltage 400v 500v 600v 700v 800v 1,000v voltage proof on insulation 300v 400v 500v 700v 1,000v resistance range 1 - 10m & 0 for e24 & e96 series value operating temp. range -55c to +155c temperature coeffcient 15ppm/c, 25ppm/c, 50ppm/c, 100ppm/c note: special value is available on request env ironme ntal char acteristics p er f or manc e t es t t es t m e t ho d app r a ise short time overload iec 60115-1 4.13 2.5 times rcwv for 5 sec. 0.25%+0.05 voltage proof on insulation iec 60115-1 4.7 in v-block for 60 sec., test voltage by type by type temperature coeffcient iec 60115-1 4.8 -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 2355c for 30.5 sec. 95% min. coverage solvent resistance of marking iec 60115-1 4.30 ipa for 50.5 min. with ultrasonic no deterioration of 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 for 1,000 hr. (1.5 hr. on, 0.5 hr. 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: 201304 note:
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