Low Value Flat
Chip Resistor
LRC/LRF Series
Welwyn Components
•
•
•
•
•
Standard 2512, 2010 and 1206 sizes
Resistance values down to 0.003 ohms
Leach resistant solder-plated copper
wrap-around termination
Low inductance - less than 0.2nH
Standard EIA Tape - 1206 = 8mm; 2010 or
2512 = 12mm
Electrical Data
LR1206
Power rating at 70°C
Resistance range
Dielectric withstanding voltage
TCR
Resistance tolerance
Temperature rise at rated power
Pad and trace area for max power rating @ 70°C
2
LR2010
1.0
0R003 to 1R
200
≤R005
5%, >R005 1, 2, 5%
LR2512
1.5/2.0*
0R003 to 1R
200
watts
ohms
volts
ppm/°C
%
°C
mm
2
0.5
0R010 to 1R
200
±100 (Contact factory for value below 0.050 ohms)
40
30
80
30
90
100
*2 Watts with total solder pad and trace size of 300 mm
Physical Data
Dimensions (mm)
Size
LR1206
LR2010
LR2512
L
3.20±0.305
5.23±0.38
6.50±0.38
W
1.63±0.203
2.64±0.25
3.25±0.25
H (max)
0.8
0.8
0.8
D
0.48±0.25
0.48±0.25
0.48±0.25
D1
0.48±0.25
0.48±0.25
0.48±0.25
LR 1225
D
W
LR 1206 / 2010 / 2512
W
H
L
H
D
D
1
L
Protective Overcoat
Resistive Element
Copper Termination
Solder Plating
Nickel Barrier Layer
Copper Wraparound
Termination
Alumina Substrate
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
Issue E · 12.04
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
23
Low Value Flat
Chip Resistor
LRC/LRF Series
Welwyn Components
Dimensions (mm)
A
LR1206
LR2010
LR2512
2.0
3.05
3.7
B
4.0
6.5
7.75
C
1.25
B
A
1.5
C
1.5
(%)
100
80
Power Rating
60
40
20
0
25
70
Ambient temperature
150 (°C)
Characteristics
Thermal Shock
Short Time
Overload
High Temperature
Exposure
Temperature
Cycling
Moisture
Load Life
Low Temperature
Operation
Low Temperature
Storage
Resistance to
Solder Heat
Leach Resistance
Test Method
MIL-STD-202 Method 107
Condition B, -65°C +125°C
MIL-PRF-55342
MIL-PRF-55342
MIL-STD-883 Method 1010
Test Condition B
MIL-PRF-55342
MIL-PRF-55342
Rated Power @ 70°C
MIL-PRF-55342
-65°C, 100 Hours
MIL-STD-202 Method 210
Molten Solder 250°C
Performance
±0.5%
±0.5%
±0.5%
±0.25%
±0.5%
±1.0%
±0.5%
±0.5%
±0.25%
90 seconds
minimum
LRC 251
21w a
2
tt
LRC 201
0 0.5 wa
1 w
tt
LR C 12
06 0.25
.5 w att
w att
Note:
For resistance values R025 and below part will be supplied as type LRF.
Components must be mounted with resistance value marking face up to ensure correct resistance value and tolerance.
Ordering Procedure
Example: LRF2512 at 10 milliohms (hence flip-chip mounted) and 2% tolerance on a reel of 1800 pieces
LRF2512
–
R01GW
Type
Mounting
F
Conventional (element up)
Flip-chip (element down)
Values > R025
Values < R025
Size
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
G
J
1%
2%
5%
Packing
W
T1
Tape
1206 or 2010
2512
All sizes
3000/reel
1800/reel
1000/reel
Standard
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 12.04
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