Surface Mounted
Resistors
Resistors
Surface Mounted
Surface Mounted Resistors
CR Series
Resistors
CR Series
CECC released products
CECC released products
CR Series
versions available for high reliability applications
100% high temperature and overload screened
Terminations available for
CECC released products
wire bonding or soldering
100% high temperature and overload screened
versions available for high reliability applications
Available in sizes down to 0503
versions available for high reliability applications
Terminations available for wire bonding or soldering
Resistance range 1 ohm to100M ohms
Tolerances down to 0.1%
Terminations available for wire bonding or soldering
Available in sizes down to 0503
Solder
1 ohm to100M ohms
Available in sizes down to 0503
a nickel barrier layer
Resistance range
terminations have
Shorting Links
Resistance range 1 ohm
available
ohms
Tolerances down to 0.1%
to100M
Tolerances down to 0.1%
Solder terminations have a nickel barrier layer
Solder terminations have a nickel barrier layer
Shorting Links available
Shorting Links available
Welwyn Components
Welwyn Components
100% high temperature and overload screened
Electrical Data
Electrical Data
These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding CR series products
CR1005
CR1206
CR2010
CR2512
Notes
watts
0.125
0.25
0.5
1.0
ohms
1R to 100M
1R to 1M
volts
100
150
200
400
500
Notes
CR0503
CR1005
CR1206
CR2010
CR2512
ppm/°C
ohms
100:
0.063
0.125
<10
0.125
200: 10 to 1M ohms
0.5
>1M ohms 250
0.25
1.0
%
0.1, 0.25, 0.5, 1, 2, 5
to 1M
See table of value ranges
1R to 10M
1R to 100M
1R
-5
50
°C
100
150
200
5 to 155
400
500
TCR -55° to +155°C
ppm/°C
<10 ohms 200: 10 to 1M ohms 100: >1M ohms 250
C
l
EC
ance
401-004 Requirements
C 40
C
0.
0805
25, 0.5, 1, 2, 5
R
1, 0.
CR1206
Resistance to er
%
See table of value ranges
Power
ture ran
at
e
70°C
rating
g
watts
0.125
-55 to 155
0.25
Ambient tempera
°C
Resistance range
ohms
1R to 10M
Limiting element voltage
volts
100
200
CECC 40401-004 Requirements
CR0805
CR1206
TCR -55°C
ppm/°C
<10 ohms 200: 10 to 1M 100: >1M 200
Power rating at 70°C
to +125°C
watts
0.125
0.25
Resistance range
+20°C to +70°C
ohms
1R t
<10 ohms 200: 10 to 1M 50: >1M 100
o 10M
TCR
ppm/°C
Limiting element
tance tolerance
volts
100
200
, 1, 2, 5
Resis
voltage
%
0.5
See table of value ranges
TCR -55°C to
mbient temperatur
ppm/°C
<10 ohms 200: 10 to 1M
-55 to +12
200
100: >1M
5
A
+125°C
e range
°C
TCR +20°C to +70°C
ppm/°C
<10 ohms 200: 10 to 1M 50: >1M 100
Resistance tol
ECC
ce
401-008 Requirements
%
See
2512
value ranges
C
eran
40
CR080
0.5, 1, 2, 5
5
CR1206
CR2010
CR
table of
Ambient temperature ran
at
e
70°C
°C
-
Power rating
g
watts
0.125
55 to +125
0.25
0.5
1.0
Resistance range
ohms
1R to 10M
1R to 10M 1R to 1M
1R to 1M
CECC 40401-008 Requirements
CR0805
CR1206
CR2010
CR2512
Limiting element voltage
volts
100
200
400
500
Power rating at 70°C
to +155°C
watts
0.125
0.25
10 to 1M ohms 100:
1.0
0.5
TCR -55°C
ppm/°C
<10 ohms 200:
Resistance range
ohms
1R to 10M
1R
>1M ohms
1R to 1M
to 10M
1R to 1M
250
Limiting element
tance tolerance
volts
100
500
Resis
voltage
%
0.1,
200
5, 0.5, 1,
400
5
0.2
2,
See table of value ranges
TCR -55°C to +155°C
ppm/°C
<10 ohms 200: 10 to 1M ohms 100:
Ambient temperature range
°C
-55 to 155
>1M ohms 250
Resistance tol
ECC
ce
401-003 Requirements
%
See table of value ranges
C
eran
40
C
0.
0805
25, 0.5, 1, 2, 5
R
1, 0.
CR1206
Ambient temperature ran
at
e
70°C
°C
Power rating
g
watts
0.063
-55 to 155
0.125
Resistance range
ohms
1R to 3M
1R to 5M
CECC 40401-003 Requirements
CR0805
CR1206
Limiting element voltage
volts
100
200
Power rating at 70°C
watts
0.063
0.125
TCR -55°C to +125°C
ppm/°C
<5 ohms 500: 5 to 10 ohms 350:
Resistance range
ohms
1R to 3M
1R to 5M
10 to 3M ohms 100: >3M ohms 250
Limiting element voltage
volts
100
200
Resistance tolerance
%
0.25, 0.5, 1, 2, 5
See table of value ranges
TCR -55°C to +125°C
ppm/°C
<5 ohms 500: 5 to 10 ohms 350:
Ambient temperature range
°C
-55 to 125
10 to 3M ohms 100: >3M ohms 250
exceeded by the corresponding CR series products
Resistance
These
r
tables indicate the CECC specification requirements, and these are met or
0.25, 0.5, 1, 2, 5
tole ance
%
See table of value ranges
Ambient temperature range
°C
-55 to 125
Values
E24 & E96 preferred
Any value to order
Thermal impedance
°C/watt
800
Commercial
Power rating at 70°C
Resistance range
Commercia
Limiting element voltage
l
TCR
70°C
to +155°C
watts
Power rating at
-55°
Resis
Resistance range
tance tolerance
ohms
Amb
voltage
Limiting element
ient temperature range
volts
CR0503
0.063
1R to 10M
C
50
805
R0
CR0805
0.125
800
360
290
200
80
80
70
Values
Thermal impedance
°C/watt
360
E24 & E96 preferred
290
200
Mounted on custom
designed PCB’s
Any value to order
Mounted on custom
designed PCB’s
70
General Note
General Note
General Note
Welwyn Components reserves
Components Limited
in
Bedlington, Northumberland NE22 7AA,
liability.
© Welwyn
the right to make changes
·
product specification without notice or
UK
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.
TT Electronics reserves the right to make changes in
· Facsimile: +44 (0) 1670 829465 ·
or liability.
to print.
All information is subject to Welwyn’s own data
product specification without
at time of going
Telephone: +44 (0) 1670 822181
and is considered accurate
notice
Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© 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
BI Technologies IRC Welwyn
A subsidiary of
TT electronics plc
www.ttelectronics.com/resistors
07
11.
07
.
09
A subsidiary of
TT electronics plc
07
11.
07
.
09
© TT Electronics plc
11.13
17
Surface Mounted
Surface Mounted
Resistors
Resistors
CR Series
CR Series
Welwyn Components
Physical Data
Dimensions of Standard Styles (mm) & Weight (g)
Wrap around
Style
0503
0805
1005
1206
2010
2512
†
L
W
T max
0.5
0.6
0.7
0.7
0.7
0.7
A
0.3±0.15
0.4±0.2
0.6±0.3
0.6±0.3
B
†
0.9 min
1.8 min
3.0 min
4.4 min
C
0.20±0.1
0.3±0.1
0.4±0.15
0.4±0.15
N/A
N/A
Wt
0.005
0.009
0.015
0.020
0.036
0.055
Alternative styles for
surface mounting resistors
A
B
L
A
W
T
1.25±0.2 0.63±.15
2.0±0.2 1.25±0.15
2.5±0.3 1.25±0.2
3.2±0.2
5.1±0.3
6.5±0.3
1.6±0.2
2.5±0.2
3.2±0.2
Not available
Not available
C
C
T
Wrap-around terminations
(3 faces)
L
W
Planar terminations
This dimension determines the number of conductors which may pass under the surface mounted device.
Construction
Thick film resistor material, overglaze and organic protection
are screen printed on a 96% alumina substrate.
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.
Terminations
Planar (or single-sided) termination is gold and suitable for
wire-bonding; wrap-around is suitable for soldering.
Marking
All relevant information recorded on the primary package or reel.
Performance Data
CECC 40401-008 CECC40401-004 CECC40401-003
Requirements
Load at rated power: 1000 hours at 70°C
Shelf life: 12 months at room temp.
Derating from rated power at 70°C
Overload
Dry Heat: 1000 hours at UCT
(125°C for 003 & 004 - 155°C for 008)
Long term damp heat
Temperature rapid change
Resistance to solder heat
Voltage proof
∆R%
∆R%
∆R%
volts
2
0.5
0.5
0805 : 200
2010 : 400
2
0.5
0.5
1206 : 300
2512 : 500
∆R%
∆R%
∆R%
∆R%
2
-
Zero at 155°C
0805:1 1206:0.5
2
Requirements
2
-
Zero at 125°C
0.5
1
Requirements
≤
3M3 2
>3M3 3
-
Zero at 125°C
2
≤
3M3 2
>3M3 3
2
1
2
1
to 10M 1
>10M 2
1
0.25
0.25
0503 : 100
All others : 500
0.1
0.2
>10M 1
0.25
0.05
0.05
0.1
0.02
Maximum
2
Actual
Typical
0.25
Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms
Value Ranges (ohms)
Tolerance
Size
0503
0805
1005
1206
2010
2512
5
1 to 10M
1 to 100M
1 to 100M
1 to 100M
1 to 1M
1 to 1M
2
1 to 10M
1 to 50M
1 to 50M
1 to 50M
1 to 1M
1 to 1M
1
10 to 10M
1 to 20M
1 to 20M
1 to 25M
1 to 1M
1 to 1M
%
0.5
100 to 1M
10 to 10M
10 to 10M
10 to 10M
10 to 10M
10 to 10M
0.25
N/A
100 to 1M
100 to 1M
100 to 1M
100 to 1M
100 to 1M
0.1
N/A
100 to 1M
100 to 1M
100 to 1M
N/A
N/A
© Welwyn Components Limited
General Note
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
TT Electronics reserves the right to make changes in product specification without notice or liability.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
11.13
Surface Mounted
Surface Mounted
Resistors
Resistors
CR Series
CR Series
Welwyn Components
Application Notes
Operating Temperature Range
The chips themselves can operate at a maximum temperature
of 155°C (see performance claims above). For soldered chips,
the joint temperature should not exceed 110°C. This
condition is met when the stated power levels at 70°C are
used.
Packaging
Wrap-around Termination
Chip resistors are supplied taped and reeled on standard
8mm tape to IEC 286-3.
Quantity per reel; 3000 max.
Mounting
This chip resistor is ideally suited for handling by automatic
methods due to its rectangular shape and the small
dimensional tolerances. Electrical connection to a ceramic
substrate or to a printed circuit board can be made by wire
bonding (eg suffix ‘G’ in CR0805G) or by reflow soldering of
wrap-around terminations (eg suffix ‘F’ in CR0805F).
The ‘F’ terminations provide good leach properties and ensure
reliable contact. Due to the robust construction the resistor
chip can be immersed in the solder bath for 30 seconds at
260°C. This enables the resistor to be mounted on one side
of a printed circuit board and other wire-leaded components
on the other side.
Planar Terminations
Resistor chips are supplied in waffle packs.
Ordering Procedure
Example: CR2512 with solderable wraparound terminations at 10 kilohms and 1% tolerance
on a reel of up to 1800 pieces -
CR2512F
–
10KF
I
Type
Termination
F
G
Solderable wraparound
Gold pad planar
0805, 1206, 2010, 2512 only
All sizes
Value (use IEC62 code)
Tolerance (use IEC62 code)
B 0.1%
C 0.25%
D 0.5%
F 1%
G 2%
J 5%
Up to 3000/reel
Up to 1800/reel
Packing
I
Tape
Waffle
0805F, 1206F, 2010F
2512F
G Termination
Standard
For CECC released product state on order the CECC number. Example:
CR2512F-10KFI CECC40401-008
For SnPb finish instead of Pb-free replace the packing suffix with
PB.
Example:
CR2512F-10KFPB
For zero-ohm jumper chips use the dummy value & tolerance code
R005J
General Note
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670
© TT Electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
11 . 09
11.13
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