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
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Organic Protection
Nickel
Thick Film Conductor
Wrap-around
terminations for
soldering
Tin/lead Solder
Surface Mount
Resistor
Electrical Data
CR Series
• 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
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.
CR0503 0.063 1-10M 1-10M 10-10M 100-1M N/A 50 <10Ω 350;
10 to 100Ω
200; 100 to
1MΩ 100:
>1MΩ 250
E24 & E96
preferred
(any value to
order)
800
-55 to 125
CR0805 0.1 1-100M 1-50M 1-20M 1-10M 100-1M 100 360
CR1005 0.125 1-100M 1-50M 1-20M 1-10M 100-1M 150 290
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 0503 0805 1005 1206
Planar 0.63 0.4 0.63 0.5
Wrap-around N/A 0.4 N/A 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
∆R%
∆R%
∆R%
∆R%
∆R%
CR Series Issue September 2008 Sheet 1 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Physical Data
Dimensions (Inches and (mm))
Style L W T Wrap-around Planar Weight (g)
A B* C
0503 .049 ± .008
(1.25 ± 0.2)
.025 ± .006
(0.63 ± 0.15)
.027
(.07) not available .008 ± .004
(0.2 ± 0.1) 0.005
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
1005 .098 ± .012
(2.5 ± 0.3)
.049 ± .008
(1.25 ± 0.2)
.027
(.07) not available .016 ± .006
(0.4 ± 0.15) 0.015
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)
CR Series Issue September 2008 Sheet 2 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Sample Part No.
IRC Type
CR
Style
0503, 0805, 1005, 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
C = 0.25%; D = 0.5%; F = 1.0%; G = 2.0%; J = 5.0%
*Packaging
T = Tape Pack (8mm tape), W = Waffle Pack, P = Plastic Bag
*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.
Note: 0503 and 1005 available in waffle package only.
Ordering Data
CR 0805 F 1005 J P
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
CR Series Issue September 2008 Sheet 3 of 3
