Surface Mounted
Resistors
Welwyn Components
Resistors
SurfacSurface Moune Mountteed Rd esistors
CR Series
CR Series CECC released products
Resistors Welwyn Components
100% high temperature and overload screened
CECC released products
versions available for high reliability applications
CR Series
100% high temperature and overload screened
Terminations available for wire bonding or soldering
CECC released products
versions available for high reliability applications
Available in sizes down to 0503
100% high temperature and overload screened
Resistance range 1 ohm to 100M ohms
Terminations available for wire bonding or soldering
versions available for high reliability applications
Tolerances down to 0.1%
Availa ble in sizes down to 0503
Terminations available for wire bonding or soldering
Solder terminations have a nickel barrier layer
Resistance range 1 ohm to 100M ohms
Available in sizes down to 0503
Shorting Links available
ResistanceTolerances range down 1 tohmo 0.1% to 100M ohms
Tolerances down to 0.1%
Solde r terminations have a nickel barrier layer
Solder terminations have a nickel barrier layer
Shorti ng Links available
ShortingEl Linksec availabletrical Data
AllAll Pb-Pb-frfreeee partsparts ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amended amended b yb y(EU) (EU) 2015/863 2015/863 (R (RoHS3)oHS3)
Commercial CR0503 CR0603 CR0805 CR1005 CR1206 CR2010 CR2512 Notes
Power rating at 70C watts 0.063 0.1 0.125 0.125 0.25 0.5 1.0
Electrical Data
Electrical Data
Resistance range ohms 1R to 10M 1R to 100M 1R to 1M
Limiting element voltage volts 50 75 100 150 200 400 500
Commercial CR0503 CR0603 CR0805 CR1005 CR1206 CR2010 CR2512 Notes
Power rating atTCR 70 -55C to +155wattC s 0.06ppm/3 C 0.1 0.125 0.125 0.2 5 0.5 1.0
<10R: 200, 10R-1M0: 100, >1M0:250
Resistance rangReesistance tolerancohme s 1R to %10M 1R to 100M 0.1, 0.25, 01R.5 ,to 1 ,1M 2, 5 See table of value ranges
Limiting element voltage volts 50 75 100 150 200 400 500
Ambient temperature range C -55 to 155
TCR -55 to +155C ppm/C
<10R: 200, 10R-1M0: 100, >1M0:250
Resistance tolerance % 0.1, 0.25, 0.5, 1, 2, 5 See table of value ranges
CECC 40401-004 Requirements CR0805 CR1206
Ambient temperature range C -55 to 155
Power rating at 70C watts 0.125 0.25
Resistance range ohms 1R to 10M
CECC 40401-004 Requirements CR0805 CR1206
Limiting element voltage volts 100 200
Power rating at 70C watts 0.125 0.25
TCR -55C to +125C ppm/C <10 ohms 200: 10 to 1M 100: >1M 200
Resistance range ohms 1R to 10M
TCR +20C to +70C ppm/C <10 ohms 200: 10 to 1M 50: >1M 100
Limiting element voltage volts 100 200
TCR -55C to +125ResistaCnce tolerappm/nce C % <10 ohms 200: 10 to 1M 100: >1M0 200.5, 1, 2, 5 See table of value ranges
TCR +20C to +70C ppm/C <10 ohms 200: 10 to 1M 50: >1M 100
Ambient temperature range C -55 to +125
Resistance tolerance % 0.5, 1, 2, 5 See table of value ranges
Ambient temperature range C -55 to +125
C ECC 4 0401-008 Requirements CR0603 CR0805 CR1206 CR2010 CR2512
Power rating at 70 C watts 0.125 0.25 0.5 1.0
0.1
C ECC 4 0401-008 Requirements CR0603 CR0805 CR1206 CR2010 CR2512
Resistance rang e ohms 1R to 10M 1R to 10M 1R to 1M 1R to 1M
Power rating at 70 C watts 0.125 0.25 0.5 1.0
0.1
Limiting element voltag e volts 100 200 400 500
75
Resistance rang e ohms 1R to 10M 1R to 10M 1R to 1M 1R to 1M
TCR -55C to +155C ppm/C <10R: 200, 10R-1M0: 100, >1M0:250
Limiting element voltag e volts 75 100 200 400 500
Resistance t olerance % 0.5, 1, 2, 5 0.1, 0.25, 0.5, 1, 2, 5 See table of value ranges
TCR -55C to +155C ppm/C <10R: 200, 10R-1M0: 100, >1M0:250
Resistance t oleAramncbeient t emperature r% ange C0.5, 1, 2, 5 0.1, 0.25, 0.5, 1, 2, 5 -55 to 155 See table of value ranges
Ambient t emperature r ange C -55 to 155
C ECC 4 0401-003 Requirements CR0805 CR1206
C ECC 4 0401-003 Requirements CR0805 CR1206
Power rating at 70 C watts 0.063 0.125
Power rating at 70 C watts 0.063 0.125
Resistance rang e ohms 1R to 3M 1R to 5M
Resistance rang e ohms 1R to 3M 1R to 5M
Limiting element voltag e volts 100 200
Limiting element voltag e volts 100 200
TCR - 55C t o + 125C ppm/C <5 ohms 500: 5 to 10 ohms 350:
TCR - 55C t o + 125C ppm/C <5 ohms 500: 5 to 10 ohms 350:
10 to 3M ohms 100: >3M ohms 250
10 to 3M ohms 100: >3M ohms 250
Resistance t oleRraensicsetance t olerance % % 0.25, 0.5, 1, 2, 5 0.25, 0.5, 1, 2, 5 See table of value ranges See table of value ranges
Ambient t emperature r ange C -55 to 125
Ambient t emperature r ange C -55 to 125
These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding CR series producst
These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding CR series producst
Values E24 & E96 preferred Any value to order
Values E24 & E96 preferred Any value to order
Thermal impedanc e C/watt 800 550 360 290 200 80 70 Mounted on custom
Thermal impedanc e C/watt 800 550 360 290 200 80 70 Mounted on custom
designed PCBs
designed PCBs
Zero-ohm rating A 1 1.5 2 3
Zero-ohm rating A 1 1.5 2 3
Zero-ohm residual resistance m <20
Zero-ohm residual resistance m <20
General Note
BI Technologies IRC Welwyn
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics own data and is considered accurate at time of going to print.
www.ttelectronics.com/resistors
TT Electronics plc
06.18Surface Mounted
Surface Mounted
Resistors
Resistors
Welwyn Components
CR SeriesCR Series
Surface Mounted
Resistors
Welwyn Components
CR Series
Physical Data
Physical Data
Dimensions (mm) & Weight (mg)
Dimensions of Standard Styles (mm) & Weight (g)
Physical Data
Wrap around
Wrap around
Dimensions of Standard Styles (mm) & Weight (g)
Style L W T max C Wt
1
A B
Wrap around
Style L W T max A B C Wt
T
0503 1.250.1 0.63.1 0.5Style L Not aW vailableT max A 0.200.1B C 1.5Wt C
T
A
0503 1.250.2 0.63.15 0.5 Not available 0.200.1 0.005
C
0503 1.250.2 0.63.15 0.5 Not available 0.200.1 0.005 A
B
C
0603 1.60.1 0.80.1 0.55 0.30.15 0.6 min 0.30.15 2.2 B
L C
W L
A W
0805 2.00.2 1.250.15 0.6 0.30.15 0.9 min 0.30.1 0.009 A
0805 2.00.2 1.250.15 0.6 0.30.15 0.9 min 0.30.1 0.009
T
T
0805 2.00.15 1.250.15 0.6 0.30.15 0.9 min 0.30.1 4.7 W rap-around terminations
W rap-around terminations
1005 2.50.3 1.250.2 0.7 Not available 0.40.15 0.015 (3 faces)
1005 2.50.3 1.250.2 0.7 0.40.15 0.015
Not available (3 faces)
1005 2.50.2 1.250.2 0.7 Not available 0.40.15 6.5 L
1206 3.20.2 1.60.2 0.7 0.40.2 1.8 min 0.40.15 0.020 W
L
1206 3.20.2 1.60.2 0.7 0.40.2 1.8 min 0.40.15 0.020 W
Planar terminations
2010 5.10.3 2.50.2 0.7 0.60.3 3.0 min N/A 0.036
1206 3.20.2 1.60.2 0.7 0.40.2 1.7 min 0.40.15 8.5 Alternative styles for
surface mounting resistors
Planar terminations
2010 5.10.3 2.50.2 0.7 25120.60.6.50.3 33.03.20. min2 0.N/7A 0.60.0.0363 4.4 min N/A 0.055
Alternative styles for
2010 5.10.3 2.50.2 0.8 0.60.3 3 min 0.60.25 36
surface mounting resistors
2512 6.50.3 3.20.2 0.7 0.60.3 4.4 min N/A 0.055
This dimension determines the number of conductors which may pass under the surface mounted device.
2512 6.50.3 3.20.2 0.8 0.60.3 4.4min 0.60.25 55
This dimension determines the number of conductors which may pass under the surface mounted device.
Construction Solderability
Thick film resistor material, overglaze and organic protection Wrap-around terminations have an electroplated nickel barrier
are screen printed on a 96% alumina substrate. and solder coating, this ensures excellent leach resistance
Construction Solderability
properties and solderability. They will withstand immersion in
Terminations solder at 260C for 30 seconds.
Thick film resistor material, overglaze and organic protection Wrap-around terminations have an electroplated nickel barrier
Planar (or single-sided) termination is gold and suitable for
are screen printed on a 96% alumina substrate. and solder coating, this ensures excellent leach resistance
wire-bonding; wrap-around is suitable for soldering. Marking
properties and solderability. They will withstand immersion in
All relevant information recorded on the primary package or reel.
Terminations solder at 260C for 30 seconds.
Performance Data
Planar (or single-sided) termination is gold and suitable for
CECC 40401-008 CECC40401-004 CECC40401-003 Actual
wire-bonding; wrap-around is suitable for soldering. Marking
Requirements Requirements Requirements Maximum Typical
All relevant information recorded on the primary package or reel.
Load at rated power: 1000 hours at 70C R% 2 2 3M3 2 2 0.25
>3M3 3
Performance Data
Shelf life: 12 months at room temp. R% - - - 0.1 0.02
Derating from rated power at 70C Zero at 155C Zero at 125C Zero at 125C
CECC 40401-008 CECC40401-004 CECC40401-003 Actual
Overload R% 0603, 0805:1 0.5 2 1 0.1
1206:0.5
Requirements Requirements Requirements Maximum Typical
Dry Heat: 1000 hours at UCT R% 2 1 3M3 2 to 10M 1 0.2
Load at rated power: 1000 hours at 70C(125C fRo%r 003 & 004 - 1255C for 008) 2 3M3 2 >3M3 23 >10M 2 0.25 >10M 1
Long term damp heat R% 2 2 2 1 0.25
>3M3 3
Temperature rapid change R% 0.5 0.5 1 0.25 0.05
Shelf life: 12 months at room temp. R% - - - 0.1 0.02
Resistance to solder heat R% 0.5 0.5 2 0.25 0.05
0603:150, 0805:200,
Derating from rated power at 70C Voltage proof Zero at 155C Zevroolt sat 125C Zer o at 125C
0503:100, 0603:300,
1206:300, 2010:400, 0805:200, 1206:300
All others: 500
2512:500
Overload R% 0603, 0805:1 0.5 2 1 0.1
1206:0.5
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
Dry Heat: 1000 hours at UCT R% 2 1 3M3 2 to 10M 1 0.2
Value Ranges (ohms)
(125C for 003 & 004 - 155C for 008) >3M3 3 >10M 2 >10M 1
Tolerance %
Long term damp heat R% 2 2 2 1 0.25
Size 5 2 1 0.5 0.25 0.1
Temperature rapid change R% 0.5 0.5 1 0.25 0.05
0503 1 to 10M 1 to 10M 10 to 10M 100 to 1M N/A N/A
1 to 10M 1 to 10M 1 to 10M 100 to 1M N/A N/A
Resistance to solder heat 0603R% 0.5 0.5 2 0.25 0.05
0805 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
0603:150, 0805:200,
Voltage proof volts
0503:100, 0603:300,
1005 1 to 100M 1 to 50M 1 to 20M 10 to 10M 100 to 1M 100 to 1M
1206:300, 2010:400, 0805:200, 1206:300
All others: 500
2512:500
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
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
2512 1 to 1M 1 to 1M 1 to 1M 10 to 10M 100 to 1M N/A
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Value Ranges (ohms)
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Tolerance %
Size 5 2 1 0.5 0.25 0.1
0503 1 to 10M 1 to 10M 10 to 10M 100 to 1M N/A N/A
1 to 10M 1 to 10M 1 to 10M 100 to 1M N/A N/A
0603
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
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
General Note
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.comBI Technologies IRC Welwyn
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics own data and is considered accurate at time of going to print.
www.ttelectronics.com/resistors
TT Electronics plc
06.18