s ecifications are s bject to change itho t notice 115 4b04b - thick film surge resistor networks 4b04b-501 (pair of matched resistors) product characteristics resistance values ......................................................20 - 100 resistance tolerance ............................................................?% tcr.............................................................................100ppm/? ratio tolerance..............................................>34 ............?.5% ..............................................<34 ...............?% power dissipation (per resistor) @ 25? ..................................2w temperature range ............................................-55? to +125? environmental characteristics tests per mil-std-202 .............................................. ? r max. resistance to solvents .........................no marking deterioration resistance to solder heat....................................?.5% or 0.5 , whichever is greater solderability ........................................................>95% coverage insulation resistance ..........................10 m min. (isolated pins) bias humidity test ..........................................50v/85% rh/85? functional characteristics lightning surge test bellcore spec gr-1089 10 x 1000 m sec .................1 kv 2 x 10 m sec ....................2.5 kv itu-t k.20 10 x 700 m sec ...................2 kv power cross test .............................................per bellcore spec. (vrms applied vary with resistance values) physical characteristics body style ..........................................................open frame sip body material...........................................................96% alumina lead frame material..................................copper, solder coated standard parts available off the shelf ........................50 , 100 4b04b-502 (resistor with thermal fuse) product characteristics resistance values.....................................................5.6 - 100 resistance tolerance......................1% (optional), 5% (standard) tcr ...................................................................800 ?00ppm/? power dissipation @ 25?.......................................................2w temperature range............................................-55? to +125? functional characteristics lightning surge test bellcore spec gr-1089 10 x 1000 m sec ..................1 kv 2 x 10 m sec .....................2.5 kv power cross test ............................................per bellcore spec. (vrms applied vary with resistance values) physical characteristics body style ..........................................................open frame sip body material ..........................................................96% alumina lead frame material .................................copper, solder coated standard parts available off the shelf ................5.6 , 10 , 34 1713 19 50.80 (2.000) 15.24 (0.600) 15.24 (0.600) 15.24 (0.600) 15.24 (0.600) typ. 0.36 max. (.014 max.) 2.29 max. (.090 max.) 12.70 (0.500) max. how to order 4b 04 b - 50x - xxx model (4b = open frame) number of pins physical configuration electrical configuration ?501 = pair of matched resistors resistance code ?first 2 digits are significant ?third digit represents the number of zeros to follow how to order 4b 04 b - 50x - xxx j model (4b = open frame) number of pins physical configuration electrical configuration ?502 = resistor with thermal fuse resistance code ?first 2 digits are significant ?third digit represents the number of zeros to follow 5% tolerance features n over-voltage/lightning protection to bellcore gr-1089 & itu-t k.20 n standard ?ff the shelf?designs n typical application is secondary protection on telecom line cards n custom versions available, including smd solutions and fuse technology (contact factory) user must short pins 3 & 4 on the circuit board governing dimensions are in mm. dimensions in parenthesis are inches and are approximate. 12 3 4 25.40 .50 (1.000 .020) 2.54 .127 (.100 .005) 17.78 .254 (0.700 .010) typ. max. 0.36 max. (.014 max.) 1.40 max. (.055 max.) 3.05 max. (.120 max.) 11.30 (0.445) 2.54 .127 (.100 .005) functional schematic
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