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  specification for approval document : smd40000nh revision : a0 page : 1 of 6 1/2w, 2550, l type low resistance chip resistor (le ad free / halogen free) 1. scope this specification applies to 2.5mm x 5.0mm size 1/ 2w, fixed metal foil current sensing resistors used in electronic equipment. 2. type designation rl2550 h - ???? ? (1) (2) (3) (4) where (1) series no. (2) h = h type (3) resistance value : for example - - r002 = 2m w (4) resistance tolerance f = 1% g = 2% j = 5% 3. outline designation and marking 3-1 outline designation (1) substrate alumina 96% (2) resistor cu alloy (3) terminals sn (on cu ) (4) protection coat heat resistive epoxy resin (5) marking epoxy resin dimensions (mm) code letter rl2550 l 5.0 0.20 w 2.5 0.20 a 1.40 0.25 t (1~ 2m w ) 0.60 0.15 (3m w ) 0.45 0.15 figure 1. construction and dimensions a a r002 l w t
specification for approval document : smd40000nh revision : a0 page : 2 of 6 3-2 marking resistance value is marked on the top surface. ex.) 2m w ? r002 4. ratings 4-1 specification power ratings* 1/2w resistance value 1 ~ 3m w temperature coefficient of resistance 275ppm/ resistance tolerance 1% , 2% , 5% insulation resistance over 100m w maximum working voltage (v) ( p*r) 1/2 note * : power ratings is based on continuous full load oper ation at rated ambient temperature of 70 . for resistors operated at ambient temperature in ex cess of 70 , the maximum load shall be derated in accordance with the following curve. 4-2 rated voltage the rated voltage shall be determined by the follow ing expression. r p v = where v ? rated voltage (v) r ? nominal resistance value ( w ) p ? rated dissipation (w) 4-3 operation and storage temperature range -55 to +170 - 55 100 70 0 1 70 rated load(%) ambient temperature( ) figure 2 . ? power temperature derating cur v e
specification for approval document : smd40000nh revision : a0 page : 3 of 6 5. characteristics test item condition of test requirements short time overload 2.5 * rated voltage for 5 secon ds refer to jis c 5201-1 4.13 d r : (0.5%+0.0005 w ) without significant damage by flashover ( spark, arching ), burning or breakdown etc. insulation resistance the resistor shall be cramped in the metal block and tested , as shown below. test voltage : 100 15v dc for 1 minute refer to jis c 5201-1 4.6 mounting condition g. between electrode and protection film 100m w or over between electrode and substrate 1,000m w or over voltage proof the voltage : 100v ac (rms.) for 1 minute refer to jis c 5201-1 4.7 d r : (0.5%+0.0005 w ) without damage by flashover, fire or breakdown, as shown below. thermal shock -55 ~125 5 cycles, 15 min at each extreme condition refer to jis c 5201-1 4.19 d r : (0.5%+0.0005 w ) without distinct damage in appearance low temperature storage kept at -55 , 1,000 hours refer to jis c 5201-1 4.23.4 d r : (0.5%+0.0005 w ) without distinct damage in appearance high temperature exposure kept at 125 for 1,000 hours refer to jis c 5201-1 4.23.2 d r : (0.5%+0.0005 w ) without distinct damage in appearance solderability temperature of solder : 245 5 immersion duration : 3 0.5 second refer to jis c 5201-1 4.17 uniform coating of solder cover minimum of 95% surface being immersed resistance to soldering heat dipped into solder at 270 5 for 10 1 seconds refer to jis c 5201-1 4.18 d r : (0.5%+0.0005 w ) without distinct deformation in appearance
specification for approval document : smd40000nh revision : a0 page : 4 of 6 6. recommend land pattern w l d 2550 3.03 6.12 2.56 note : we recommend there is no circuit design betw een pads to avoid circuit short cu trace w l d sensing trace
specification for approval document : smd40000nh revision : a0 page : 5 of 6 7. packaging 7-1 dimensions 7-1-1 tape packaging dimensions 2.80 0.10 1.050.10 0.230.10 5.35 0.10 4.0 0.10 4.0 0.10 2.0 0.05 pulling direction 12.0 0.30 1.75 0.10 5.50 0.05 unit : mm 1.55 0.05 1.500.1 7-1-2 reel dimensions 13.00.5 178.02.0 60.20.5 13.21.5 2.00.5 + 0 . 5 - 0 4 . 0 0 16.00.2 unit : mm
specification for approval document : smd40000nh revision : a0 page : 6 of 6 7-2 peel strength of top cover tape the peel speed shall be about 300mm/minute the peel force of top cover tape shall between 0.1 to 0.7n 7-3 number of taping 2,000 pieces / reel 7-4 label marking the following items shall be marked on the reel. (1) type designation (2) quantity (3) manufacturing date code (4) manufacturers name (5) the country of origin 165 ~ 180 top cover tape carrier tape 0.1 ~ 0.7n


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