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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
L23 Line Feed Resistors w/Resettable Ceramic PTC
Product Characteristics Resistor Tolerance (R1 + R3) and (R2 + R4) 30 ohms .......................................................................8.6 % 50 ohms .......................................................................5.6 % 100 ohms .....................................................................3.3 % Resistor Tolerance (R1 + R3) / (R2 + R4) 30 ohms ....................................................................1 2.5 % 50 ohms ....................................................................1 2.3 % 100 ohms ..................................................................1 2.2 % Rating .........................................................................300 V, 1.0 A Trip Time @ 1 A ............................................0.9 seconds @ 20 C Trip Current .........................................................155 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 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 ..............30, 50, 100 ohms Circuit Schematic
R1 R3 R2 R4
1
2
4
6
8
9
Product Dimensions
MAX. SEATED HEIGHT 11.30 (0.445)
25.75 MAX. (1.010)
0.84 REF. (.033)
2.54 (.100) 2.54 (.100) TYP. 2 PLCS.
5.08 (.200) TYP. 3 PLCS.
3.175 + 0.64/-0.13 (.125 + .025/-.005)
0.51 0.25 THICK (.020 x .010) 0.81 DIA. HOLE (.032)
3.81 MAX. THICKNESS (.150)
DIMENSIONS:
MM (INCHES)
How To Order
L23 A100AA
Model (L23 = LFR w/Resettable Ceramic PTC) Resistor Tolerance * A030AA = 30 ohms * A050AA = 50 ohms * A100AA = 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.
L23 Line Feed Resistors w/Resettable Ceramic PTC
Trip Characteristics
Typical PTC + Resistor Time to Trip
100.00 300 250 200 150 100 50 0 -40
Typical Hold Current vs Temperature for PTC + Resistor
Time (Seconds)
10.00
1.00
0.10
0.01 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 2.8 3.0 3.3
Current (Amps)
Hold Current (mA)
-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.

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