Download LFR-2 SERIES ALFR-2 SERIES

ISO-9001
Registered
TELECOMMUNICATIONS
LINE FEED RESISTORS
ALFR-2 SERIES
LFR-2 SERIES
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• Meets all test and specifications
of TR-1089 & UL-1459
• 5.1 ohm to 100 ohm range
• 1% tolerance
• Meets GR-1089 lightning surge
• Meets GR-1089 power cross
• UL-497A approved
Withstands lightning surges
Opens safely under power cross
Flameproof inorganic construction
Auto-insertable, small size
Meets FCC, EIA and UL requirements
Made in Barbados
SPECIFICATIONS:
Limits - LFR-2/ALFR-2
Characteristics
Wattage
Temperature Coefficient
Tolerance
Load Life (1000 hrs.)
Temperature Cycling
Short Time Overload (5 x RW for 10 sec.)
Moisture Load
Resistance Range
Lightning Surge (1000 V-10/1000 µsec)
25 negative & 25 positive surges (2 minute intervals)
The standard ALFR-2 contains a 128°C thermal fuse. For faster fusing
characteristics 110°C fuse is available.
DIMENSIONS (Inches):
The four (4)
terminal leads shall
be in the line to a
tolerance to ±0.015
inch. The lead
spacing dimensions
as specified, shall
be measures from
the tip of the lead to
the tip of the lead.
The leads may
have a 15° draft
relative to the
protector body.
TYPICAL FUSING CURVE:
FUSING TIME vs. FUSING POWER
1.045±0.020
0.030 Meniscus
Permitted
.450±.020
TIME TO FUSE
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2 watts
50 ppm/°C
1% and 5%
1% ∆R maximum
1% ∆R maximum
1% ∆R maximum
1% ∆R maximum
1 to 1600 ohms
2% ∆R maximum
DESIGN &
CONSTRUCTION:
The Line Feed Resistor is a
tight tolerance, stable resistor
which has the additional
capability to withstand both in
rush currents and certain
lightning pulse surges but
would fuse safely when
exposed to overload
conditions such as 600 volt
power line crosses.
.125±.020
.150±.020
POWER DISSIPATION
0.025
Typ.
1
.100±.015
In circuit applications terminal leads
1 and 2 shall be
connected together
externally and leads
3 and 4 used for
connection of the .265±.020
device. For proper
performance and
reduction of safety
hazards the current
flow should be from
lead 3 to 4.
2
3
HOW TO ORDER:
4
Sample Part No.:
.700±.015
0.070 Typ.
LFR-2 100Ω
Ω 1%
.900±.015
Type
Power
0.138±0.020
0.023Lead Dia.
0.032 Lead Dia.
Resistance Value
Tolerance
±1%, ±5%
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860 · Boone, North Carolina 28607-1860 · Tel: 828-264-8861 · Fax: 828-264-8865
1
Mouser Electronics
Authorized Distributor
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IRC:
LFR2-2R00-J-013B LFR215R0J