Features ■ ■ ■ ■ Over-voltage/lightning protection to Bellcore GR-1089 & ITU-T K.20 Standard “off the shelf” designs Typical application is secondary protection on telecom line cards Custom versions available, including SMD solutions and fuse technology (contact factory) 4B04B - Thick Film Surge Resistor Networks 4B04B-501 (Pair of Matched Resistors) 4B04B-502 (Resistor with Thermal Fuse) Product Characteristics Resistance Values ......................................................20Ω - 100Ω Resistance Tolerance ............................................................±1% TCR.............................................................................100ppm/°C Ratio Tolerance..............................................>34Ω............±0.5% ..............................................<34Ω...............±1% Power Dissipation (per resistor) @ 25ºC ..................................2W Temperature Range ............................................-55ºC to +125ºC Product Characteristics Resistance Values.....................................................5.6Ω - 100Ω Resistance Tolerance......................1% (optional), 5% (standard) TCR ...................................................................800 ±200ppm/°C Power Dissipation @ 25ºC.......................................................2W Temperature Range............................................-55ºC to +125ºC Environmental Characteristics TESTS PER MIL-STD-202 ..............................................∆R MAX. Resistance to Solvents .........................No Marking Deterioration Resistance to Solder Heat....................................±0.5% or 0.5Ω, whichever is greater Solderability ........................................................>95% Coverage Insulation Resistance ..........................10 MΩ min. (isolated pins) Bias Humidity Test ..........................................50V/85% RH/85°C 10 x 1000 µsec ..................1 kV 2 x 10 µsec .....................2.5 kV Power Cross Test ............................................Per Bellcore spec. (Vrms applied vary with resistance values) Functional Characteristics Lightning Surge Test Bellcore Spec GR-1089 Functional Characteristics Lightning Surge Test Bellcore Spec GR-1089 Physical Characteristics Body Style ..........................................................Open Frame SIP Body Material ..........................................................96% Alumina Lead Frame Material .................................Copper, solder coated Standard Parts Available Off the Shelf ................5.6Ω, 10Ω, 34Ω 10 x 1000 µsec .................1 kV 2 x 10 µsec ....................2.5 kV ITU-T K.20 10 x 700 µsec ...................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 ........................50Ω, 100Ω 15.24 (0.600) 15.24 7 (0.600) 11.30 (0.445) 2.54±.127 (.100±.005) 1 2 17.78±.254 (0.700±.010) 3 4 2.54±.127 (.100±.005) 0.36 Max. (.014 Max.) 12.70 MAX. (0.500) 2.29 Max. (.090 Max.) 1 MAX. 1.40 Max. TYP. (.055 Max.) 50.80 (2.000) 15.24 TYP. (0.600) 3.05 Max. (.120 Max.) 25.40±.50 (1.000±.020) 13 15.24 (0.600) How To Order 19 Functional Schematic Governing dimensions are in mm. Dimensions in parenthesis are inches and are approximate. 0.36 Max. (.014 Max.) User must short pins 3 & 4 on the circuit board How To Order 4B 04 B - 50X - XXX 4B 04 B - 50X - XXX J Model (4B = Open Frame) Model (4B = Open Frame) Number of Pins Number of Pins Physical Configuration Physical Configuration Electrical Configuration • 501 = Pair of Matched Resistors Electrical Configuration • 502 = Resistor with Thermal Fuse Resistance Code • First 2 digits are significant • Third digit represents the number of zeros to follow Resistance Code • First 2 digits are significant • Third digit represents the number of zeros to follow 5% tolerance S ecifications are s bject to change itho t notice 115