L23 Datasheet, PDF (1/2 Pages) Bourns Electronic Solutions – Line Feed Resistors w/Resettable Ceramic PTC

Features
■ Thick film technology
■ Fail safe
■ Protection to ITU-T K.20
Applications
■ 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
How To Order
Model
(L23 = LFR w/Resettable Ceramic PTC)
Resistor Tolerance
• A030AA = 30 ohms
• A050AA = 50 ohms
• A100AA = 100 ohms
Custom values available; contact factory.
L23 A100AA
Circuit Schematic
R1
R3
R2
R4
1
2
4
6
Product Dimensions
25.75 _MAX.
(1.010)
8
9
MAX. SEATED
HEIGHT
11.30
(0.445)
2.54
(.100)
2.54
(.100)
TYP.
2 PLCS.
5.08
(.200)
TYP.
3 PLCS.
3.81
(.150)
MAX.
THICKNESS
DIMENSIONS:
MM
(INCHES)
0.84
(.033)
REF.
3.175 + 0.64/-0.13
(.125 + .025/-.005)
0.51
(.020
±0.25
x .010)
THICK
0.81
(.032)
DIA.
HOLE
Circuit Protection Division
Asia-Pacific:
Tel: [phone]
Fax: [phone]
Europe:
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Fax: [phone]
The Americas:
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www.bourns.com
Specifications are subject to change without notice.
Customers should verify device performance in their specific applications.