High Value
Surface Mount Resistor
Wrap-around
terminations for
soldering
Organic Protection
Tin/lead Solder
HR Series
• 100M ohms to 50G ohms
• Low voltage coefficient of resistance
Thick Film Conductor
Nickel
Electrical Data
Limiting
Element
Voltage
(volts)
Operating
Temp.
Range (°C)
Resistance Range
Resistance Tolerance
TCR (ppm/°C)
(ohms)
IRC Type
(%)
(measured at 10 volts)
(measured at 10 volts)
0805
1005
1206
100M to 50G
100M to 50G
100M to 50G
100
150
200
-55 to +125
-55 to +125
-55 to +125
0 to -2000
0 to -1500
0 to -1000
100M to 1G: 5, 10
>1G to 50G: 25, 50
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.
Contruction:
Thickness:
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:
The thickness of these devices depend on the size of the chip.
The table below shows the standard substrate thickness used
(mm).
Wrap-around terminations on HR resistors have good ‘leach’ resistance
properties. They will withstand immersion in solder at 260°C for 30
seconds.
STYLE
Planar
Wrap-around
0805
0.4
0.4
1005
0.63
N/A
1206
0.5
0.5
Marking:
All relevant information is recorded on the primary package or reel.
F = Wrap-around; G = Planar Gold.
Environmental Data
Actual
Maximum
Typical
∆R%
Load at rated power: 1000 hours at 70°C
Shelf life: 12 months at room temperature
Dry heat: 1000 hrs at 125°C
Temperature rapid change
2
1
2
2
1
∆R%
∆R%
0.5
0.3
0.5
200
1
∆R%
∆R%
volts
Change on Wave Soldering
Voltage proof
1
100
Voltage coefficient of resistance
(10V - 25V)
%volts
0805
1.0
0.8
0.2
0.4
0.5
1005
0.05
1206
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
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
HR Series Issue October 2008 Sheet 1 of 2