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

High Value

Surface Mount Resistor

Electrical Data

HR Series

IRC Type

Resistance Range

(ohms)

(measured at 10 volts)

Limiting

Element

Voltage

(volts)

Operating

Temp.

Range (°C)

TCR (ppm/°C)

(measured at 10 volts)

Resistance Tolerance

(%)

0805

100M to 50G

100

-55 to +125

0 to -2000

100M to 1G: 5, 10

>1G to 50G: 25, 50

1005

100M to 50G

150

-55 to +125

0 to -1500

1206

100M to 50G

200

-55 to +125

0 to -1000

Environmental Data

Contruction:

The resistor material is screen printed onto a 96% alumina substrate and

covered with a protection comprising of a glaze followed by an organic

coating. This construction gives an insulated device.

Terminations:

Wrap-around terminations on HR 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

1005

1206

Planar

0.4

0.63

0.5

Wrap-around

0.4

N/A

0.5

F = Wrap-around; G = Planar Gold.

Power Rating:

The high resistance value of these devices is such that power dissipation is always small. The rating is therefore determined by voltage considerations

only, as shown in the table above.

Actual

Maximum

Typical

Load at rated power: 1000 hours at 70°C

2

1

Shelf life: 12 months at room temperature

2

1

Dry heat: 1000 hrs at 125°C

2

0.5

Temperature rapid change

1

0.3

Change on Wave Soldering

1

0.5

Voltage proof

volts

100

200

Voltage coefficient of resistance

%volts

(10V - 25V)

1.0

0.8

0.2

0.4

0.5

0.05

∆R%

∆R%

∆R%

∆R%

∆R%

0805

1005

1206

HR Series Issue October 2008 Sheet 1 of 2