LOB Datasheet, PDF (2/3 Pages) Welwyn Components Limited – Low Resistance Metal Element Resistors

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Welwyn Components
Power derating percentage vs
Free air ambient temperature
Temperature coefficient of resistance vs
Resistance value
100
90
80
70
60
50
40
30
20
10
0
0
25
50
75
100
125
150
175
Ambient Temp (°C)
400
LOB1
300
LOB3
200
100 ^LOB5
0
0
25
50
75
100
Resistance (ohms x 10^-3)
Test
Load life (2000 hours)
Thermal shock
Vibration
Mechanical shock
Dielectric strength
Insulation resistance
*±0.0005 ohm allowance for test/contact error.
MIL-STD 202
Method 108
Method 107
Method 204
Method 213
Method 301
Method 302
MAX %∆R*
±1%
±1%
±0.5%
±0.5%
±0.5%
>10¹¹
Packaging
Resistors are supplied taped and reeled.
Bulk packaging available.
Ordering Procedure
Example: LOB3 at 10 milliohms and 5% tolerance on a reel of 1250 pieces -
Type
LOB3– R01JI
Value (use IEC62 code)
Tolerance (use IEC62 code)
F 1% J 5%
H 3%
Note: 1% & 5% preferred
Packing
I Tape
LOB1
LOB3
LOB5
3500/reel
1250/reel
800/reel
Standard
Unit
%∆R
%∆R
%∆R
%∆R
%∆R
ohms
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Issue B · 03.02
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