leaded resis tors metal film resistors mfr type normal & miniature style [ mfr series ] fea tures power rating 1/6w, 1/4w, 1/2w, 1w, 2w resistance tolerance 0.1%, 0.25%, 0.5%,1% t.c.r. 15ppm/ oc , 25ppm/ oc , 50ppm/ oc , 100ppm/ oc dimensions sty le dimension normal miniature l ?d h ?d mfr-12 mfr25s 3.40.3 1.90.2 282.0 0.50.05 mfr-25 mfr50s 6.30.5 2.40.2 282.0 0.60.05 mfr-50 mfr1ws 9.00.5 3.30.3 262.0 0.60.05 mfr100 mfr2ws 11.51.0 4.50.5 352.0 0.80.05 mfr200 - 15.51.0 5.00.5 332.0 0.80.05 unit : mm intr oduction the mfr series metal film resistors are manufactured using vacuum sputtering system to deposit multiple layers of mixed metals and passivative materials onto a carefully treated high grade ceramic substrate, the resistors are coated with layers of blue lacquer. ?d h l ?d dera ting cur ve ambient temperature (oc) rated load (%) hot- s pot tempera ture surface temp. rise (oc) applied load, % of rcwv mfr2ws mfr200 mfr1ws mfr100 mfr50s mfr-50 mfr25s mfr-25 mfr-12 0 25 50 75 100 200 150 100 50 measuring position 100 80 60 40 20 20 40 60 80 100 120 140 160 180 70oc
note : electrical chara cteristics style mfr-12 mfr25s mfr-25 mfr50s mfr-50 mfr1ws mfr100 mfr2ws mfr200 power rating at 70oc 1/6w 1/4w 1/2w 1w 2w operating temp. range -55oc to +155oc maximum working voltage 200v 200v 250v 300v 350v 400v 500v 500v 500v maximum overload voltage 400v 400v 500v 600v 700v 800v 1000v 1000v 1000v dielectric withstanding voltage 300v 400v 500v 500v 500v 700v 1000v 1000v 1000v value range 0.5%, 1% 10 ? ~1m ? value rang 0.1%, 0.25% 100 ? ~100k ? temperature coeffcient (by type) 15ppm/ oc , 25ppm/ oc , 50ppm/ oc , 100ppm/ oc * resistance range for standard resistance, below or over this resistance on request. envir onment al chara cteristics performance test test metho d appraise short time overload jis-c-5202 5.5 2.5 times rcw v for 5 seconds (0.25%+0.05 ? ) dielectric withstanding voltage jis-c-5202 5.7 in v-block for 60 seconds by type temperature coeffcient of resistance jis-c-5202 5.2 -55oc to +155oc by type insulation resistance jis-c-5202 5.6 in v-block >10000m ? solderability jis-c-5202 6.5 235 5oc for 5 0.5 seconds 95% min. coverage resistance to solvent jis-c-5202 6.9 ipa for 1 min. with ultrasonic no deterioration of coatings and markings terminal strength direct load for 10 sec. in the direction of the terminal leads 2.5kg (24.5n) pulse overload jis-c-5202 5.8 4 times rcw v 10000 cycles (1 sec. on , 25 sec. off) (1%+0.05 ? ) load life in humidity jis-c-5202 7.9 402oc, 90~95% rh at rcwv for 1000 hrs. (1.5%+0.05 ? ) (1.5 hrs. on , 0.5 hrs. off ) load life jis-c-5202 7.10 70 oc at rcwv for 1000 hrs. (1.5 hrs. on , 0.5 hrs. off) (1.5%+0.05 ? ) temperature cycling jis-c-5202 7.4 -55 oc ? room temp. ? +155 oc ? room temp. for 5 cycles (0.75%+0.05 ? ) resistance to soldering heat jis-c-5202 6.4 350 oc 10 oc for 30.5 seconds (0.25%+0.05 ? ) * rated continuous working voltage (rcw v)= power rating x resistance value
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