IRC TT LOB-3R010FLFLT Low resistance metal element resistor Datasheet

Low Resistance
Metal Element Resistor
LOB Series
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Low TCR
High stability over life
Tolerances from ±1% to ±5%
Ultra low resistance values (0.005Ω to 0.1Ω)
Inherently non-inductive (≤.02 µh @ 0.5MHz)
Available in 1W, 3W, and 5W rated packages
Lead free RoHS compliant construction available
DESCRIPTION:
The LOBΩ Series power precision metal element resistors feature resistance values down to 0.005 with virtually no inductance.
Available in 1, 3, and 5 watt rated axial leaded packages, these resistors are compatible with automatic insertion equipment.
APPLICATIONS:
• Switchmode and linear power supplies
• Automotive current-sensing circuits
• Instrumentation
• Regulators
CONSTRUCTION:
The LOBΩ Series resistors feature tinned copper leads welded directly to a low-temperature coefficient resistance element in a
highly automated proprietary process. The leaded resistor elements are then encapsulated in a molding compound.
Specifications
Style
Continuous Power Dissipation
@ 25°C in free air (watts)
Overload Power
for 5 seconds (watts)
LOB-1
1
5
√1 x R
175
LOB-3
3
15
√3xR
175
LOB-5
5
25
√5xR
175
Maximum Working
Voltage (volts)
Maximum Storage
Temperature (°C)
*Power Dissipation - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element temperature. Ambient
air temperature, velocity of cooling air, thermal resistance of heat, and the temperature of surrounding objects will affect this transfer, and must be taken into account when selecting a resistor.
Environmental Testing
Test Parameters
MIL-STD 202
MAX %∆R *
Unit
Load Life (2,000 hours)
Method 108
±1%
%∆R
Thermal Shock
Method 107
±1%
%∆R
Vibration
Method 204
±0.5%
%∆R
Mechanical Shock
Method 213
±0.5%
%∆R
Dielectric Strength
Method 301
±0.5%
%∆R
Insulation Resistance
Method 302
>1011
Ohms
*±0.0005 ohm allowance for test/contact error.
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
LOB Series Issue October 2008 Sheet 1 of 3
Low Resistance
Metal Element Resistor
Physical Data
connect
point
connect
point
C
d
D
L
l
Dimensions (Inches (mm))
Style
LOB-1
LOB-3
LOB-5
L
D
C
l
0.390 ± 0.010
(9.9 ± 0.3)
0.140 ± 0.008
1.31
1.50 ± 0.125
0.0305 ± 0.002
(3.6 ± 0.2)
(33.274)
(38.1 ± 3.2)
(0.813 ± 0.051)
0.560 ± 0.010
0.2100 ± 0.010
1.31
1.375 ± 0.125
0.0305 ± 0.002
(14.224 ± 0.254)
(5.334 ± 0.254)
(33.274)
(34.925 ± 3.175)
(0.813 ± 0.051)
0.920 ± 0.010
0.330 ± 0.010
1.670
1.250 ± 0.125
0.040 ± 0.002
(23.368 ± 0.254)
(8.382 ± 0.254)
(42.418)
(31.750 ± 3.175)
(1.016 ± 0.051)
TCR
(ppm/°C)
Temperature Coefficient of
Resistance vs. Resistance Value
Power Derating Percentage vs.
Free Air Ambient Temperature:
400
100
300
75
200
50
100
0
LOB-1
LOB-3
LOB-5
0
d
25
50
75
100
Resistance (ohms x 10-3)
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
25
0
0
25
50
75
100
125
150
175
Ambient Temperature (°C)
LOB Series Issue October 2008 Sheet 2 of 3
Low Resistance
Metal Element Resistor
Ordering Data
To order, specify style, resistance value, tolerance, and package type as in the
following example:
Sample Part No.
LOB-3
R010
F
LF
LT
IRC Type
LOB-1 (1 watt)
LOB-3 (3 watt)
LOB-5 (5 watt)
Resistance Value
0.005Ω
0.02Ω
0.01Ω
0.025Ω
0.015Ω
0.03Ω
0.04Ω
0.05Ω
0.07Ω
0.08Ω
0.1Ω
Tolerance
J = 5%, H = 3%, F = 1%
Lead-Free RoHS Compliant
Packaging
LT = Lead Tape, 500 pcs. min.
LOB-1 = 3,500 pcs. max.
LOB-3 = 1,250 pcs. max.
LOB-5 = 800 pcs. max.
BLK = Bulk Pack, 500/box
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
LOB Series Issue October 2008 Sheet 3 of 3
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