yageo corporation leaded resistors metal oxide film resistors flame-proof type normal & miniature style [ rsf series ] features low cost, prompt delivery high power-to-size ratio for significant space savings flameproof silicone coating (ul94v-0) high surge/overload capability non-inductive design wide resistance range: 1 : ~1m : resistance tolerance: r 5% unit : mm introduction these metal oxide resistors offer excellent performance in applications where stability and uniformity of characteristics are desired. they provide lower cost alternatives to carbon composition resistors and general purpose metal films. metal oxides also can replace many low power general purpose wirewound applications, saving both money and time, with shorter delivery cycles. the normal style & the miniature style of rsf series are coated with layers of gray and pink colors flame-proof lacquer respectively. dimensions style dimension normal miniature l ?d h ?d rsf-25 rsf50s 6.3 r 0.5 2.4 r 0.2 28 r 2.0 0.6 r 0.05 rsf-50 rsf1ws 9.0 r 0.5 3.3 r 0.3 26 r 2.0 0.6 r 0.05 rsf100 rsf2ws 11.5 r 1.0 4.5 r 0.5 35 r 2.0 0.8 r 0.05 rsf200 rsf3ws 15.5 r 1.0 5.0 r 0.5 33 r 2.0 0.8 r 0.05 rsf5ss rsf3wm 17.5 r 1.0 6.5 r 1.0 32 r 2.0 0.8 r 0.05 rsf300 rsf5ws 24.5 r 1.0 8.5 r 1.0 38 r 2.0 0.8 r 0.05 rsf500 C 24.5 r 1.0 8.5 r 1.0 38 r 2.0 0.8 r 0.05 * rsfiws (mb type) ?d0.8 r 0.05 ambient temperature (oc) rated load (%) hot -spot temperature surface temp. rise (oc) applied load, % of rcwv 100 80 60 40 20 50 100 150 200 250 70oc 0 25 50 75 100 200 150 100 50 rsf500 rsf5ws rsf300 rsf3wm, rsf5ss rsf2ws rsf3ws rsf200 rsf1ws rsf100 rsf50s rsf-50 measuring position derating curve ?d h l ?d
note : electrical characteristics style rsf-25 rsf50s rsf-50 rsf1ws rsf100 rsf2ws rsf200 rsf3ws/ rsf300 rsf5ss/ rsf500 rsf3wm rsf5ws power rating at 70oc 1/4w 1/2w 1w 2w 3w 5w operating temp. range -55oc to +155oc maximum working voltage 200v 250v 250v 300v 350v 350v 350v 350v/450v 500v 500v/500v 750v maximum overload voltage 300v 400v 400v 500v 600v 600v 600v 600v/700v 800v 800v/800v 1000v dielectric withstanding voltage 250v 350v 350v 400v 500v 500v 500v 500v/600v 700v 700v/750v 750v value range r 5% 1 : ~1m : temperature coefficient r 300ppm/oc * standard resistance is 1 : ~1m : , below or over this resistance on request. environmental characteristics performance test test method appraise short time overload jis-c-5202 5.5 2.5 times rcw v for 5 seconds r (1%+0.05 : ) dielectric withstanding voltage jis-c-5202 5.7 in v-block for 60 seconds by type temperature coefficient of resistance jis-c-5202 5.2 -55oc to +155oc r 300ppm/oc insulation resistance jis-c-5202 5.6 in v-block >1000m : solderability jis-c-5202 6.5 235oc for 5 r 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 t 2.5kg (24.5n) pulse overload jis-c-5202 5.8 4 times rcw v 10000 cycles (1 sec. on , 25 sec. off) r (2%+0.05 : ) load life in humidity jis-c-5202 7.9 40 r 2oc, 90~95% rh at rcw v for 1000 hrs. r (5%+0.05 : ) (1.5 hrs. on , 0.5 hrs. off ) load life jis-c-5202 7.10 70oc at rcwv for 1000 hrs. (1.5 hrs. on , 0.5 hrs. off) r (5%+0.05 : ) temperature cycling jis-c-5202 7.4 -55oc ? ? ?
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