SURFACE MOUNT
RESISTOR
ISO-9001
Registered
Organic Protection
CR
SERIES
•
•
•
•
•
•
•
Wrap around
terminations for
soldering
Tin/lead Solder
0 ohm available
1.0 ohms to 100M ohms
0 ohms available also
Tolerance down to 0.25%
Nickel
Solder terminations have a nickel barrier layer
Shorting links available
Any resistance value available within specified range
Thick Film Conductor
SPECIFICATIONS:
Limiting
Resistance Range (ohms)
Power
Element TCR -55°C to
Rating At
+125°C
70°C
0.5% 0.25% Voltage
(ppm/°C)
(volts)
IRC type (watts) 5% Tol. 2% Tol. 1% Tol. Tol.
Tol.
<10Ω 350;
50
0.063
CR0503
1-10M 1-10M 10-10M 100-1M N/A
CR0805
CR1005
CR1206
0.1
0.125
0.25
1-100M 1-50M 1-20M 1-10M 100-1M
1-100M 1-50M 1-20M 1-10M 100-1M
1-100M 1-50M 1-25M 1-10M 100-1M
100
150
200
10 to 100Ω
200; 100 to
1MΩ
100:
>1MΩ 250
Thermal
Impedance**
(°C/watt)
800
360
290
200
Operating
Temp.
Range
(°C)
-55 to 125
Values
E24 &
E96
preferred
(any value to
order)
*For 10 devices mounted on 50x25mm p.c.b. area. ** Zerohm is available.
Construction:
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
Planar
0.63
0.4
Wrap-around
N/A
0.4
F = wrap around; G = planar gold.
1005
0.63
N/A
1206
0.5
0.5
DIMENSIONS
(Inches and (mm)):
Wrap Around
Style
0503
0805
1005
1206
L
.049±.008
(1.25±0.2)
.079±.012
(2.0±0.3)
.098±.012
(2.5±0.3)
.126±.016
(3.2±0.4)
W
.025±.006
(.063±0.15)
.049±.008
(1.25±0.2)
.049±.008
(1.25±0.2)
.063±.008
(1.6±0.2)
T
.027
(.07)
0.27
(.07)
.027
(.07)
.027
(.07)
A
not available
.012±.006
(0.3±0.15)
.035
(0.9min)
B*
Planar
C
.008±.004
(0.2±0.1)
.012±.004
(0.3±0.1)
.016±.006
(0.4±0.15)
.016±.006
(0.4±0.15)
Weight (g)
0.005
0.009
0.015
0.020
not available
.016±.008
(0.4±0.2)
.067
(1.7min)
* This dimension determines the number of conductors which may pass under the surface mounted device.
Planar
Terminations
Wrap
Around
Terminations
(3 Faces)
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road
•
Boone, North Carolina 28607-1860
•
Tel: 828-264-8861
•
Fax: 828-264-8866
•
www.irctt.com
1
ISO-9001
Registered
CR SERIES PERFORMANCE DATA:
Actual
Requirements
Maximum
Typical
Load at rated power: 1000 hrs at 70°C
Shelf life: 12 months at room temperature
Derating from rated power at 70°C
Long term damp heat
Temperature rapid change
Resistance to solder heat
Voltage proof
∆R%
∆R%
2 (5 above 3M3)
1
0.25
0.1
zero at 125°C
∆R%
∆R%
∆R%
volts
2
1
2.5
1
0.25
0.25
500
0.25
APPLICATION NOTES:
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 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 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.
HOW TO ORDER :
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.
Sample Part No.:
CR
Type
Style
Termination
(F= Wrap Around, P= Planar)
0805
F
8M2
J
P
Value
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
wraparound terminations are supplied tape & reel on .8mm tape.
Note:0503 and 1005 available in waffle package only.
2
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road
•
Boone, North Carolina 28607-1860
•
Tel: 828-264-8861
•
Fax: 828-264-8866
•
www.irctt.com
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