Features ■ ■ ■ Applications Thick film technology Fail safe Protection to ITU-T K.20 ■ ■ ■ ■ ■ ■ Analog Line Cards CPE (Customer Premises Equipment) DDS (Digital Data Systems) DLC (Digital Loop Carriers) T1/T3 Transmission Lines ISDN D22B Line Feed Resistors w/Resettable Polymer PTC & Overvoltage Protectors Product Characteristics Resistor Tolerance ................................................................±1 % Polyswitches Matched to ...............................................2.0 ohms Rating .........................................................................250 V, 1.0 A Trip Time @ 1 A ............................................1.1 seconds @ 20 °C Trip Current .........................................................125 mA @ 25 °C Environmental Characteristics TESTS PER MIL-STD-202 Humidity ..........................................................................103B Solderability.....................................................................208D Thermal Shock ................................................................107B Resistance to Solvents ......................................................215 Resistance to Solder Heat ..............................................210D Flammability ...................................................................UL 94V-0 IEC 695-2-2 Circuit Schematic OVERVOLTAGE PROTECTOR R1 R2 R3 R4 1 5 7 9 8 15 11 Product Dimensions MAX. SEATED HEIGHT 12.19 (0.480) 38.35 MAX. (1.510) Functional Characteristics ITU-T K.20 Lightning Surge ................................................................1 KV Power Induction........................................................600 Vrms Power Contact..........................................................230 Vrms UL 497A Physical Characteristics Body Style ..........................................................Open Frame SIP Body Material...........................................................96% Alumina Lead Frame Material..................................Copper, solder coated Standard Parts Available Off the Shelf ........20, 30, 50, 100 ohms How To Order 0.84 REF. (.033) 1.27 (.050) 10.16 (.400) TYP. 2 PLCS. 5.08 (.200) 0.51 ±0.25 THICK (.020 x .010) 3.81 MAX. THICKNESS (.150) D22B 100AA Model (D22B = LFR w/Resettable Polymer PTC & Overvoltage Protectors) 3.175 + 0.64/-0.13 (.125 + .025/-.005) DIMENSIONS: 0.81 DIA. HOLE (.032) MM (INCHES) Resistor Tolerance • 020AA = 20 ohms • 030AA = 30 ohms • 050AA = 50 ohms • 100AA = 100 ohms Custom values available; contact factory. Circuit Protection Division Asia-Pacific: Tel: +886-2 2562-4117 Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 Fax: +1-951 781-5700 www.bourns.com Specifications are subject to change without notice. Customers should verify device performance in their specific applications. D22B Line Feed Resistors w/Resettable Polymer PTC & Overvoltage Protectors Trip Characteristics Time to Trip Hold Current vs Temperature 10 200 160 1 Hold Current (mA) Time (Seconds) 180 0.1 0.01 0 0.5 1 1.5 2 Current (Amps) 2.5 3 3.5 140 120 100 80 60 40 -40 -20 0 20 40 60 80 100 Temperature (°C) REV. A 06/05 Specifications are subject to change without notice. Customers should verify device performance in their specific applications.