1/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.e ultra-low ohmic resistors for current detection pmr25 ? features 1) ultra low-ohmic resistance range (1m ? ~) 2) improved current detection accura cy by trimming-less structure. highly recommended for large current / high speed switching circuit. 3) completely pb free product 4) iso9001- / iso/ts 16949-approved ? rating 1w at 70 c ? 55 c to + 155 c for resistors operated at the ambient temperature in excess of 70 ? , the load shall be derated in accordance with fig.1 item conditions specifications rated power rated voltage and current are determined from the following. e: rated voltage (v) i : rated current (a) p: rated power (w) r: resistance ( ) rated voltage rated current operating temperature nominal resistance see table 1. e = p r e = p / r 0 20 40 60 80 100 ? 55 0 70 100 125 155 ambient temperature ( c) power load (%) fig.1 5 1 to 4 u v f ( 1%) j ( 5%) 100 r esistance (m ) tolerance special code temperature coefficient (ppm / ?c) table.1
2/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.e data sheet pmr25 ? characteristics item test conditions (jis c 5201-1) resistor type guaranteed value resistance variation of resistance with temperature solderability damp heat, steady state endurance at 70 c endurance rapid change of temperature bend strength of the end face plating component solvent resistance resistance to soldering heat overload f : 1% j : 5% see table.1 no remarkable abnormality on the appearance. a new uniform coating of minimum of 95% of the surface being immersed and no soldering damage. without open. jis c 5201-1 4.5 measuring method : measure under terminations by 4 probes. jis c 5201-1 4.8 measurement : 25 / -55 / + 25 / + 125 c jis c 5201-1 4.18 soldering condition : 260 5 c duration of immersion : 10 1s. jis c 5201-1 4.24 40 c, 93%rh test time : 56days jis c 5201-1 4.25.1 rated power, 70 c 1.5h : on ? 0.5h : off test time : 1,000h to 1,048h jis c 5201-1 4.25.3 155 c test time : 1,000h to 1,048h jis c 5201-1 4.29 23 c 5 c solvent : 2-propanol jis c 5201-1 4.19 test temp. : ? 55 c to + 125 c 5cyc jis c 5201-1 4.33 jis c 5201-1 4.17 rosin?thanol (25%wt) soldering condition : 235 5 c duration of immersion : 2.0 0.5s. jis c 5201-1 4.13 rated voltage (current) 2.5, 2s. fig.2 (under terminations) probes ( 2.0%+0.0005 ) ( 1.0%+0.0005 ) ( 3.0%+0.0005 ) ( 3.0%+0.0005 ) ( 3.0%+0.0005 ) ( 0.5%+0.0005 ) ( 1.0%+0.0005 )
3/3 www.rohm.com c 2011 rohm co., ltd. all rights reserved. 2011.03 - rev.e data sheet pmr25 ? dimensions&construction 0.50 1.95 2.50 0.52 0.52 0.42 0.32 0.32 0.90 1.00 0.80 0.90 0.90 3.20 no. resistive metal element(ni-cu/ni-cr alloy) primary electrode(cu) middle electrode(ni) external electrode(sn) overcoat(resin:black) marking(resin:yellow) material l t ( the cross section) l 0.20 w 0.20 t 0.15 a 0.20 c 0.20 b 0.20 1m 2m 3m 4m 5m b (unit:mm ) w ( the surface) ( the back) 2l00 a c resistance measure ? part no. explanation ?? special part number p ackaging specifications code part no. pm 2 r nominal resistance hzp part no. resistance tolerance j( 5%) code f( 1%) embossed tape (4mm pitch) 180mm (7in.) packaging specifications reel 2 , 000 basic ordering unit (pcs) r eel ( 180) : compatible with jeita standard "eiaj et-7200b" : standard product 5 h z p j v resistance tolerance 1% 5% f j 5m 1 to 4m u v pmr25 f j : : 4 digits 3 digits resistance code, 3 or 4 digits. resistance tolerance resistance code resistance value ( ) 1m 2m 3m 4m 5m j 1l0 2l0 3l0 4l0 5l0 f 1l00 2l00 3l00 4l00 5l00 resistance tolerance ? ? ? ? packaging ? 0 2 0 4 0 6 0 8 0 2 0 4 0 6 0 8 c abd label abcd reel taping a 0 p 1 p 0 p 2 b 0 f w k e d 0 eiaj et-7200b compliant (unit : mm) (unit : mm) wf ea 0 b 0 d 0 p 0 p 1 p 2 k 8.0 0.3 3.5 0.05 1.75 0.1 3.0 0.1 3.5 0.1 4.0 0.1 4.0 0.1 2.0 0.05 max. 1.1 180 0 ? 1.5 60 +1 0 9 +1.0 0 13 0.2 1.5 +0.1 0
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