LF2X-R100JB Datasheet, PDF (1/1 Pages) RCD COMPONENTS INC. – FAILSAFE FUSIBLE WIREWOUND RESISTORS

FAILSAFE FUSIBLE WIREWOUND RESISTORS
RESISTORS CAPACITORS COILS DELAY LINES
LF2 SERIES
RoHS
Term.W is
RoHS
compliant
& 260°C
compatible
FEATURES
Industry’s widest range!
Withstands lightning surges and power crosses
Resistance range: 0.01Ω to 10KΩ
LF2 1Ω to 1.6K meets UL497A, Bellcore GR1089, ITU-T K.20
LF2A meets Bellcore TR1089 specifications
Standard tolerance: ±1% or ±5% (available to ±0.01%)
Available on RCD’s exclusive SWIFT ^TM delivery program!
OPTIONS
Option A: TR1089 performance
Option X: Non-inductive (0.2µH max ≤50Ω, 0.37µH >50Ω)
Option ER: 100 Hour Burn-In
Customized fusing characteristics
Matched pairs or groups
RCD type LF2 is designed to provide circuit protection for
telecom applications, such as line feed, ADSL, HDSL, and
switching networks, as well as snubber circuits, switching
regulators, power faults, etc. The LF2 is a combination power
resistor and isolated thermal fuse housed in a ceramic case.
The combination enables the device to withstand short-time
overloads (various lightning surges, AC power crosses, inrush
currents, and ESD pulses), yet open safely under extended
overload conditions. The all-welded internal construction
combined with highest grade materials ensures utmost
performance and reliability. For even greater protection under
power cross conditions, as required by TR1089, specify LF2A.
←
↑
B
↓
12
A
→
→^{| C |}←
↓
34
E
D
F
↑
○
○
○
→
←
.032”
.023”
Pin
Pin
1
2
&
&
4,
3
HOW TO USE LF2
12
Pin #1 and #2 shall be shorted
together by the user on the PCB.
The LF2 resistor is connected
3 4 into the circuit via pins #3 and #4.
RCD
Type
Wattage
@ 25°C
Resistance
Range
LF2
2.0 W
0.01Ω - 10KΩ∗
* LF2A resistance range is 1.8Ω to 100Ω
A
1.045±.02
[26.5±.5]
DIMENSIONS Inch [mm]
B
C
D
.450±.02
[11.43±.5]
.265±.02
[6.73±.5]
.125 Min.
[3.17±.5]
E
.700±.015
[17.78±.4]
F
.900±.015
[22.86±.4]
TYPICAL PERFORMANCE CHARACTERISTICS
Wattage Derating
21mW/°C >25°C
Load Life (1000 hours)
±0.5%
Moisture Resistance
±1%
Temperature Cycling
±0.5% (-55 to +120°C)
Short Time Overload
±0.2%(10W, 5 Sec)
Lightning Surge Capability
LF2 5.6Ω -10K
LF2A 1.8 -100Ω
10µSx1000µS 1KV/100A peak, 10Ω
source, 50 pulses x 60S rep (peak
voltages up to 10KV avail.)
Temperature Coefficient
.10Ω to .99Ω
1Ω and above
Standard Optional
90ppm 10,20,30,50
50ppm 10,20,30
Operating Temperature
-55°C to +120°C std (may be higher or
lower on custom designs depending
on fuse rating)
Flammability
Fusing Characteristics
UL 94V-0, EC 695-2-2
153100000WWWW^{1111111111122222222222333333333334444444444455555555555666666666667777777777788888888888999999999990000000000011111111111222222222223333333333344444444444}
3W
10 20 30 50 100 200 300 500
LF2 Fusing Range (Seconds, Typ.)
APPLICATION NOTES:
Failsafe surge resistors are often tailored to particular customer
requirements. Consultation with RCD’s Engineering department is
recommended on all applications to ensure optimum performance
at the most cost-effective price. Depending on the application,
Series LF2 or LF2A can often satisfy the requirements of UL497A,
UL1950, UL1459, FCC Part 68, REA 397 & PE60, Bellcore
GR1089 & TR1089, ITU-T K.20 & K.21, VDE 0750, IEC 1000-4,
CCITT K17, IEEE 472 &587, ANSI C37.90 & C62.41, SAE J1113,
MIL-STD-704, MIL-STD-1399, & MIL-STD-1275.
P/N DESIGNATION: ^LF2
- 1001 - F B W
RCD Type
Options: X, ER, A
(leave blank for standard)
Resis.Code 1%: 3 signif. figures & multiplier,
(R100=.1Ω,1R00=1Ω,10R0=10Ω,1000=100Ω, 1001=1K, etc)
Resis.Code 2%-10%: 2 signif. figures & multiplier,
(R10=0.1Ω, 1R0=1Ω, 100=10Ω, 101=100Ω, 102=1K, etc)
Tolerance Code: J=5%, H=3%, G=2%, F=1%
Packaging: B = Bulk (standard)
Optional Temp. Coefficient (leave blank for standard):
5=5ppm, 10 = 10ppm, 20 = 20ppm, etc.
Termination: W=Pb-free, Q=Sn/Pb (leave blank if either is acceptable)
RCD Components Inc, 520 E.Industrial Park Dr, Manchester, NH, USA 03109 rcdcomponents.com Tel: [phone] Fax: [phone] Email:[e-mail]
FA023B Sale of this product is in accordance with GF-061. Specifications subject to change without notice.
83