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

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

∆R%

∆R%

∆R%

∆R%

∆R%

CR Series Issue March 2009 Sheet 1 of 3