Surface Mount
Resistor
CR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT electronics plc
10. 11
· 0 ohm available
· Shorting links available
· 1.0 ohms to 100M ohms
· Tolerance down to 0.25%
· Solder terminations have a nickel barrier layer
· Any resistance value available within specified range
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
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Wire and Film Technologies Division
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Organic Protection
Nickel
Thick Film Conductor
Wrap-around
terminations for
soldering
Tin/lead Solder
Surface Mount
Resistor
Electrical Data
CR Series
s 0 ohm available
sShorting links available
s 1.0 ohms to 100M ohms
sTolerance down to 0.25%
sSolder terminations have a nickel barrier layer
sAny resistance value available within specified range
IRC
Type
Power
Rating
at
70°C
(watts)
Resistance Range (ohms) Limiting
Element
Voltage
(volts)
TCR -55°C to
+125°C
(ppm/°C)
Values
Thermal
Impedance**
(°C/watt)
Operating
Temp.
Range
(°C)
5%
Tol.
2%
Tol.
1%
Tol.
0.5%
Tol.
0.25%
Tol.
CR0805 0.1 1-100M 1-50M 1-20M 1-10M 100-1M 100
<10Ω 350;
10 to 100Ω
200; 100 to
1MΩ 100:
>1MΩ 250
E24 & E96
preferred
(any value to
order)
360
-55 to 125
CR1206 0.25 1-100M 1-50M 1-20M 1-10M 100-1M 200 200
* For 10 devices mounted on 50x25mm p.c.b. area ** Zerohm is available
Contruction:
Thick film resistor material, overglaze and organic protection are screen
printed on a 96% alumina substrate.
Terminations:
Wrap-around terminations on CR resistors have good ‘leach’ resistance
properties. They will withstand immersion in solder at 260°C for 30
seconds.
Marking:
All relevant information is recorded on the primary package or reel.
Thickness:
The thickness of these devices depend on the size of the chip.
The table below shows the standard substrate thickness used
(mm).
STYLE 0805 1206
Planar 0.4 0.5
Wrap-around 0.4 0.5
F = Wrap-around; G = Planar Gold.
Electrical Data
Requirements Actual
Maximum Typical
Load at rated power: 1000 hours at 70°C 2 (5 above 3M3) 1 0.25
Shelf life: 12 months at room temperature 0.1
Derating from rated power at 70°C zero at 125°C
Long term damp heat 2 1 0.25
Temperature rapid change 1 0.25
Resistance to solder heat 2.5 0.25
Voltage proof volts 500
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
#23ERIES)SSUE-ARCH3HEETOF
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
s3OUTH3TAPLES3TREETs#ORPUS#HRISTI4EXAS53!
Wire and Film Technologies Division
4ELEPHONEs&ACSIMILEs7EBSITEWWWIRCTTCOM
Organic Protection
Nickel
Thick Film Conductor
Wrap-around
terminations for
soldering
Tin/lead Solder
Surface Mount
Resistor
Electrical Data
CR Series
s 0 ohm available
sShorting links available
s 1.0 ohms to 100M ohms
sTolerance down to 0.25%
sSolder terminations have a nickel barrier layer
sAny resistance value available within specified range
IRC
Type
Power
Rating
at
70°C
(watts)
Resistance Range (ohms) Limiting
Element
Voltage
(volts)
TCR -55°C to
+125°C
(ppm/°C)
Values
Thermal
Impedance**
(°C/watt)
Operating
Temp.
Range
(°C)
5%
Tol.
2%
Tol.
1%
Tol.
0.5%
Tol.
0.25%
Tol.
CR0805 0.1 1-100M 1-50M 1-20M 1-10M 100-1M 100
<10Ω 350;
10 to 100Ω
200; 100 to
1MΩ 100:
>1MΩ 250
E24 & E96
preferred
(any value to
order)
360
-55 to 125
CR1206 0.25 1-100M 1-50M 1-20M 1-10M 100-1M 200 200
* For 10 devices mounted on 50x25mm p.c.b. area ** Zerohm is available
Contruction:
Thick film resistor material, overglaze and organic protection are screen
printed on a 96% alumina substrate.
Terminations:
Wrap-around terminations on CR resistors have good ‘leach’ resistance
properties. They will withstand immersion in solder at 260°C for 30
seconds.
Marking:
All relevant information is recorded on the primary package or reel.
Thickness:
The thickness of these devices depend on the size of the chip.
The table below shows the standard substrate thickness used
(mm).
STYLE 0805 1206
Planar 0.4 0.5
Wrap-around 0.4 0.5
F = Wrap-around; G = Planar Gold.
Electrical Data
Requirements Actual
Maximum Typical
Load at rated power: 1000 hours at 70°C 2 (5 above 3M3) 1 0.25
Shelf life: 12 months at room temperature 0.1
Derating from rated power at 70°C zero at 125°C
Long term damp heat 2 1 0.25
Temperature rapid change 1 0.25
Resistance to solder heat 2.5 0.25
Voltage proof volts 500
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
#23ERIES)SSUE-ARCH3HEETOF
Surface Mount
Resistor
CR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT electronics plc
10. 11
s3OUTH3TAPLES3TREETs#ORPUS#HRISTI4EXAS53!
Wire and Film Technologies Division
4ELEPHONEs&ACSIMILEs7EBSITEWWWIRCTTCOM
Physical Data
Dimensions (Inches and (mm))
Style L W T Wrap-around Planar Weight (g)
A B* C
0805 .079 ± .012
(2.0 ± 0.3)
.049 ± .008
(1.25 ± 0.2)
.027
(.07)
.012 ± .006
(0.3 ± 0.15)
.035
(0.9min)
.012 ± .004
(0.3 ± 0.1) 0.009
1206 .126 ± .016
(3.2 ± 0.4)
.063 ± .008
(1.6 ± 0.2)
.027
(.07)
.016 ± .008
(0.4 ± 0.2)
.067
(1.7min)
.016 ± .006
(0.4 ± 0.15) 0.020
* This dimension determines the number of conductors which may pass under the surface mounted device.
APPLICATION NOTES:
Mounting
This chip resistor is ideally suited for handling by automatic methods due to its rectangular shape and the small dimensional tolerances. Electri-
cal connection to a ceramic substrate or to a printed circuit board can be made by reflow soldering of wrap-around terminations (e.g. 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 completely 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.
Surface Mount
Resistor
Resistor
On Top
Face
C
C
T
W
L
Resistor
On Top
Face
T
W
L
B
A
A
Planar Terminations Wrap
Around
Terminations
(3 Faces)
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Surface Mount
Resistor
CR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT electronics plc
10. 11
s3OUTH3TAPLES3TREETs#ORPUS#HRISTI4EXAS53!
Wire and Film Technologies Division
4ELEPHONEs&ACSIMILEs7EBSITEWWWIRCTTCOM
Sample Part No.
IRC Type
CR
Style
0805, 1206
Termination
F = Wrap Around, P = Planar
Resistance Value (EIA 4-digit code)
(≥100Ω - First 3 significant digits plus 4th digit multiplier)
Example: 100Ω = 1000; 1000Ω = 1001, 150,000Ω = 1503
(>100Ω - "R" is used to designate decimal)
Example: 51Ω = 51R0; 1Ω = 1R00; 0.25Ω = R250
Tolerance
F = 1.0%; G = 2.0%; J = 5.0%
*Packaging
T = Tape Pack (8mm tape)
*The preferred methods of packaging are:
Gold terminated chips are packed in waffle boxes, chips with wrap-around
terminations are supplied tape & reel on .8mm tape.
Ordering Data
CR 0805 F 1005 J T
Specify type, reference, etc. as indicated in this example of a CR0805F 8.2M ohms 5% resistor with wrap-around
terminations and packed in a plastic bag.
Surface Mount
Resistor
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