Surface Mounted
Surface Mounted
Resistors
Surface Mounted
Resistors
Resistors
CR Series
CR Series
Welwyn Components
Welwyn Components
CECC released
·
CECC
100% high
products
products
screened
released
CR Series
temperature
·
CECC
high temperature
highand overload
screened
100%
released products
overload
versions available for
and
reliability applications
·
·
·
·
·
·
Electrical Data
Commerc
Electrical
ial
Data
Power rating at 70°C
versions available for
and overload screened
Terminations available for wire bonding or soldering
100% high temperature
high reliability applications
Terminations available
reliability applications
Available in sizes down to 0503
versions available for high
for wire bonding or soldering
Terminations available for
ohm to100M ohms
Resistance range 1
wire bonding or soldering
Available in sizes down to 0503
Available in
range 1 ohm to100M ohms
Tolerances down to 0.1%
Resistance
sizes down to 0503
Resistance range 1
to 0.1%
Solder
down
ohm
have a nickel
Tolerances
terminations
to100M ohms
barrier layer
Tolerances down to
available
Shorting Links
0.1%
Solder terminations have a nickel barrier layer
Solder terminations have a nickel barrier layer
Shorting Links available
Shorting Links available
CR0503
CR0805
CR1005
CR1206
CR2010
CR2512
Notes
watts
0.063
0.125
0.125
0.25
0.5
1.0
Resistance range
ohms
0503
to 10M
0805
1R
2512
Commercial
CR
1R
CR
CR10
1R to 100M
206
05
CR1
CR2010
CR
to 1M
Notes
Power rating at
element voltage
watts
volts
0.063
50
0.125
100
0.125
150
0.25
200
0.5
Limiting
70°C
400
1.0
500
Resistance range
to +155°C
ohms 1R to 10M
1R to 100M
to 1M ohms 100: >1M
to 1M
250
1R
ohms
TCR -55°
ppm/°C
<10 ohms 200: 10
Limiting
esistance
voltage
ce
volts
100
150
0.1, 0.25, 0.5, 1, 2, 5
400
200
500
R
element
toleran
%
50
See table of value ranges
TCR -55° to
ient temperature range
ppm/°C
<10 ohms 200: 10 to 1M ohms
o 155
>1M ohms 250
Amb
+155°C
°C
-55 t
100:
Resistance tolerance
%
0.1, 0.25, 0.5, 1, 2, 5
See table of value ranges
Ambient
E
t
CC
perature
0
an
Requirements
°C
C
em
40401-0
r
4
ge
CR0805
-55 to 155
CR1206
0.125
0.25
CR0805
C
M
1206
R
1R to 10
0.125
100
0.25
200
1R to 10
200: 10 to 1M 100: >1M 200
<10 ohms
M
100
200
<10 ohms 200: 10 to 1M 50: >1M 100
<10 ohms 200: 10 to 1M 100: >1M 200
0.5, 1, 2, 5
<10 ohms 200: 10 to 1M 50: >1M 100
-55 to +125
0.5, 1, 2, 5
CR0805
-55 to +125
CR1206
CR2010
Power rating at 70°C
watts
CECC 40401
a
004
range
-
nce
Requirements
Resist
ohms
Power rating at
element voltage
watts
volts
70°C
Limiting
Resistance range
to +125°C
ohms
TCR -55°C
ppm/°C
Limiting element voltage
volts
TCR +20°C to +70°C
ppm/°C
TCR -55°C to +125°C
ppm/°C
Resistance tolerance
%
TCR +20°C to +70°C
ppm/°C
Ambient temperature range
°C
Resistance tolerance
%
Ambient
EC
mper
40
ur
-
e
0
an
Requirements
°C
C
te
C 40
at
1 0
r
8
ge
See table of value ranges
See table of value ranges
CR2512
Power rating at 70°C
watts
0.125
0.25
0.5
1.0
CECC 40401-008 Requirements
CR0805
CR1206
CR2010
CR2512
Resistance range
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
Limiting element voltage
volts
100
200
400
500
Resistance range
ohms
1R to 10M
1R to 10M 1R to 1M
1R to 1M
TCR -55°C to +155°C
ppm/°C
<10 ohms 200: 10 to 1M ohms 100:
Limiting element voltage
volts
100
200
400
500
>1M ohms 250
TCR -55°C to +155°C
ppm/°C
<10 ohms 200: 10 to 1M ohms 100:
Resistance tolerance
%
0.1, 0.25, 0.5, 1, 2, 5
See table of value ranges
>1M ohms 250
Am
t
i e
e
t e m
°C
-5
1
t
2
5
Resistance
b
ol
n
ra
t
nce
perature range
%
0.1, 0.25, 0.5,
5
,
o
,
1
5
5
See table of value ranges
Ambient temperature range
°C
-55 to 155
CECC 40401-003 Requirements
CR0805
CR1206
Power rating at 70°C
watts
CECC 40401-003 Requirements
CR0805
0.063
CR1206
0.125
Resistance range
1R
1R
Power rating at 70°C
watts
ohms
0.063
to 3M
0.125
to 5M
Limiting element voltage
ohms
volts
Resistance range
1R to 3M
100
1R to 5M
200
T
element
to +12
p
<5 ohms 500:
200
10 ohms 350:
5 to
Limiting
CR -55°C
voltage
5°C
volts
pm/°C
100
10
5
3M ohms 100: >3M ohms 250
TCR -55°C to +125°C
ppm/°C
<5 ohms
to
00: 5 to 10 ohms 350:
Resistance tolerance
%
0.25
>3M
1, 2,
250
See table of value ranges
10 to 3M ohms 100:
, 0.5,
ohms
5
Am
t
i e
e
t e m
°C
Resistance
b
ol
n
ra
t
nce
perature range
%
0.25, 0.5,
-55
2
to 125
1, , 5
See table of value ranges
Ambient tempe
indicate the
nge
specification requirements, and these are met or exceeded
-
by
5 to
corresponding CR series products
°C
5
the
125
These tables
rature ra
CECC
Values
E24 & E96 preferred
360
E24 & E96 preferred
200
290
290
200
80
Any value to order
70
Any value to order
custom
Mounted on
designed
Mounted on custom
PCB’s
designed PCB’s
These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding CR series products
Values
Thermal impedance
Thermal impedance
°C/watt
°C/watt
800
800
360
80
70
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
General Note
General Note
Welwyn
All information is subject to Welwyn’s own data and
product specification without notice or liability.
Components reserves the right to make changes in
is considered accurate at time of going to print.
A subsidiary of
TT electronics reserves the
to Welwyn’s own data and is considered accurate at time of going to print.
TT electronics plc
A subsidiary of
All information is subject
right to make changes in product specification without notice or liability.
TT electronics plc
© Welwyn
to TT electronics’ own data
· Bedlington, Northumberland NE22
going to
All information is subject
Components Limited
and is considered accurate at time of
7AA, UK
print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
11. 09
07 . 07
© 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
07
11.
07
.
09
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT electronics plc
11. 13
17
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.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© 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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© 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
19
