Surface Mounted Resistors
CR Series
Dimensions of Standard Styles (mm) & Weight (g)
Wrap around
Style L W T max A B
†
C Wt
0503 1.25±0.2 0.63±.15 0.5 Not available 0.20±0.1 0.005
0805 2.0±0.2
1.25±0.15
0.6 0.3±0.15 0.9 min 0.3±0.1 0.009
1005 2.5±0.3 1.25±0.2 0.7 Not available 0.4±0.15 0.015
1206 3.2±0.2 1.6±0.2 0.7 0.4±0.2 1.8 min 0.4±0.15 0.020
2010 5.1±0.3 2.5±0.2 0.7 0.6±0.3 3.0 min N/A 0.036
2512 6.5±0.3 3.2±0.2 0.7 0.6±0.3 4.4 min N/A 0.055
Surface Mounted
Resistors
CR Series
© 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
CECCEN140401-802
Requirements
40401-008 CECC40401-004 CECC40401-003
Actual
Requirements Requirements Requirements Maximum Typical
Load at rated power: 1000 hours at 70°C ∆R% 21
Zero at 125°C
1
284
0.25
0.25
1
1
-
2
≤3M3 2 10.25
>3M3 3
Shelf life: 12 months at room temp. ∆R% - - - 0.1 0.02
Derating from rated power at 70° C Zero at 155° C Zero at 125° C Zero at 125°C
Overload ∆R% 0603, 0805:1
1206:0.5 0.5 2 1 0.1
Dry Heat: 1000 hours at UCT ∆R% 21
≤3M3 2 to 10M 1 0.2
1 M01>2 M01>3 3M3>
Long term damp heat ∆R% 2 2 2 1 0.25
Temperature rapid change ∆R% 0.5 0.5 1 0.25 0.05
Resistance to solder heat ∆R% 0.5 0.5 2 0.25 0.05
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Physical Data
†This dimension determines the number of conductors which may pass under the surface mounted device.
Welwyn Components
Performance Data
Value Ranges (ohms)
T
W
A
A
B
L
W rap-around terminations
(3 faces)
T
W
L
Planar terminations
C
C
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap-around is suitable for soldering.
Solderability
Wrap-around terminations have an electroplated nickel barrier
and solder coating, this ensures excellent ‘leach’ resistance
properties and solderability. They will withstand immersion in
solder at 260°C for 30 seconds.
Marking
All relevant information recorded on the primary package or reel.
Tolerance %
1.052.05.0125Size
0503 1 to 10M 1 to 10M 10 to 10M 100 to 1M N/A N/A
0805 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1005 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1206 1 to 100M 1 to 50M 1 to 25M 10 to 10M 100 to 1M 100 to 1M
2010 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
2512 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
Alternative styles for
surface mounting resistors
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
0603:150, 0805:200,
1206:300, 2010:400,
2512:500
0805:200, 1206:300 0503:100, 0603:300,
All others: 500
0603 1 to 10M 1 to 10M 1 to 10M 100 to 1M N/A N/A
BI Technologies IRC Welwyn
11.20
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
Dimensions (mm) & Weight (mg)
Style LW T max Wrap around C Wt
A B1
0503 1.25±0.1 0.63±.1 0.5 Not available 0.20±0.1 1.5
0603 1.6±0.1 0.8±0.1 0.55 0.3±0.15 0.6min 0.3±0.15 2.2
0805 2.0±0.15 1.25±0.15 0.6 0.3±0.15 0.9min 0.3±0.1 4.7
1005 2.5±0.2 1.25±0.2 0.7 Not available 0.4±0.15 6.5
1206 3.2±0.2 1.6±0.2 0.7 0.4±0.2 1.7min 0.4±0.15 8.5
2010 5.1±0.3 2.5±0.2 0.8 0.6±0.3 3min 0.6±0.25 36
2512 6.5±0.3 3.2±0.2 0.8 0.6±0.3 4.4min 0.6±0.25 55
Dimensions of Standard Styles (mm) & Weight (g)
Wrap around
Style L W T max A B†C Wt
0503 1.25±0.2 0.63±.15 0.5 Not available 0.20±0.1 0.005
0805 2.0±0.2
1.25±0.15
0.6 0.3±0.15 0.9 min 0.3±0.1 0.009
1005 2.5±0.3 1.25±0.2 0.7 Not available 0.4±0.15 0.015
1206 3.2±0.2 1.6±0.2 0.7 0.4±0.2 1.8 min 0.4±0.15 0.020
2010 5.1±0.3 2.5±0.2 0.7 0.6±0.3 3.0 min N/A 0.036
2512 6.5±0.3 3.2±0.2 0.7 0.6±0.3 4.4 min N/A 0.055
Surface Mounted
Resistors
CR Series
© 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
CECCEN140401-802
Requirements
40401-008 CECC40401-004 CECC40401-003
Actual
Requirements Requirements Requirements Maximum Typical
Load at rated power: 1000 hours at 70°C ∆R% 21
Zero at 125°C
1
284
0.25
0.25
1
1
-
2
≤3M3 2 10.25
>3M3 3
Shelf life: 12 months at room temp. ∆R% - - - 0.1 0.02
Derating from rated power at 70° C Zero at 155° C Zero at 125° C Zero at 125°C
Overload ∆R% 0603, 0805:1
1206:0.5 0.5 2 1 0.1
Dry Heat: 1000 hours at UCT ∆R% 21
≤3M3 2 to 10M 1 0.2
1 M01>2 M01>3 3M3>
Long term damp heat ∆R% 2 2 2 1 0.25
Temperature rapid change ∆R% 0.5 0.5 1 0.25 0.05
Resistance to solder heat ∆R% 0.5 0.5 2 0.25 0.05
stlovfoorp egatloV
Physical Data
†This dimension determines the number of conductors which may pass under the surface mounted device.
Welwyn Components
Performance Data
Value Ranges (ohms)
T
W
A
A
B
L
W rap-around terminations
(3 faces)
T
W
L
Planar terminations
C
C
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap-around is suitable for soldering.
Solderability
Wrap-around terminations have an electroplated nickel barrier
and solder coating, this ensures excellent ‘leach’ resistance
properties and solderability. They will withstand immersion in
solder at 260°C for 30 seconds.
Marking
All relevant information recorded on the primary package or reel.
Tolerance %
1.052.05.0125Size
0503 1 to 10M 1 to 10M 10 to 10M 100 to 1M N/A N/A
0805 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1005 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1206 1 to 100M 1 to 50M 1 to 25M 10 to 10M 100 to 1M 100 to 1M
2010 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
2512 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
Alternative styles for
surface mounting resistors
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
0603:150, 0805:200,
1206:300, 2010:400,
2512:500
0805:200, 1206:300 0503:100, 0603:300,
All others: 500
0603 1 to 10M 1 to 10M 1 to 10M 100 to 1M N/A N/A
Physical Data