Pulse Withstanding
Chip Resistors
PWC Series
•
•
•
•
•
Higher power ratings
Improved working voltage ratings
Excellent pulse withstanding performance
Sn/Pb or Pb-free wrap-around terminations
Standard chip sizes available from 0805 to 2512
Electrical Data
Characteristic
Resistance Range
±1%, ±5%
±0.5%
Power @ 70°C
Max Voltage Rating
Absolute TCR
Operating Temperature
Thermal Impedance
Pad/Trace Area
Termination
220°C/W
40mm
2*
160°C/W
125mm
2*
125mW
150V
500mW
200V
1.0W to 10MW
10W to 1MW
1.0W
400V
2.0W
500V
0805
1206
2010
2512
<6W = 0 – 350ppm;
≥6W
= ±100ppm/°C
-55°C to +155°C
80°C/W
250mm
2*
40°C/W
500mm
2*
Wrap-around Sn/Pb or Pb-free with leach resistant Ni barrier
*Recommended minimum pad and adjacent trace area for each termination for rated power on FR4 PCB.
Environmental Data
Test
Load life at rated power (1000 hours @ 70°C)
Overload (5.0 X rated power for 2512, 6.25 X rated power for other sizes, 5 secs)
High temperature storage (1000 hours @ 155°C)
Moisture resistance
Thermal shock
Resistance to soldering heat
Note
1
: 0.01W added for all resistance values <10W.
Maximum
1
∆R
1.00%
1.00%
1.00%
1.00%
0.25%
0.25%
Typical
∆R
0.25%
0.10%
0.20%
0.25%
0.05%
0.05%
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.
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TTelectronics plc
PWC Series Issue January 2009
Pulse Withstanding
Chip Resistors
Pulse Performance Data
Lighting Surge
Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50ms and 10/700ms pulse shapes. The limit of acceptance
is a shift in resistance of less than 1% from the initial value.
1.2/50 µS Lightning Surge
10000
2512
2010
1206
0805
Peak voltage (volts)
1000
100
10
1
10
100
1000
10000
100000
1000000
10000000
Resistance (ohms)
10/700 µS Lightning Surge
10000
2512
2010
Peak Voltage (volts)
1000
1206
0805
100
10
1
10
100
1000
10000
100000
1000000
10000000
Resistance (ohms)
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
PWC Series Issue January 2009
Pulse Withstanding
Chip Resistors
Pulse Performance Data
Single impulse:
The single impulse graph is
the result of 50 impulses of
rectangular shape applied at
one minute intervals. The
limit of acceptance was a
shift in resistance of less
than 1% from the initial
value. The power applied
was subject to the
restrictions of the maximum
permissible impulse voltage
graph shown.
Single Pulse
1000
Pulse Power (watts)
100
10
2512
2010
1206
1
0.0001
0.001
0.01
Pulse duration (seconds)
0.1
1
0805
Continuous Pulses
100
Pulse Power (watts)
10
2512
2010
1
Continuous load due to
repetitive pulses:
The continuous load graph
was obtained by applying
repetitive rectangular pulses
where the pulse period was
adjusted so that the
average power dissipated
in the resistor was equal
to its rated power at 70°C.
Again the limit of acceptance
was a shift in resistance of
less than 1% from the initial
value.
1206
0805
0.1
0.0001
0.001
0.01
Pulse Duration (seconds)
0.1
1
Pulse Voltage
10000
Pulse Voltage (Volts)
1000
2512
2010
1206
0805
100
10
0.0001
0.001
0.01
0.1
1
Pulse Duration (seconds)
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
PWC Series Issue January 2009
Pulse Withstanding
Chip Resistors
Physical Data
L
(mm)
0805
1206
2010
2.0±0.3
3.2±0.4
5.1±0.3
W
(mm)
1.25±0.2
1.6±0.2
2.5±0.2
T max
(mm)
0.6
0.7
0.8
A
(mm)
0.3±0.15
0.4±0.2
0.6±0.3
B min
(mm)
0.9
1.7
3.0
C
(mm)
0.3±0.1
0.4±0.15
0.6±0.25
Weight
(grams)
L
0.009
C
W
0.020
T
0.036
2512
6.5±0.3
3.2±0.2
0.8
0.6±0.3
4.4
0.6±0.25
0.055
A
Construction:
Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Wrap-around
terminations have an electroplated nickel barrier and tin-lead solder or matte-tin finish, ensuring excellent `leach´ resistance
properties and solderability.
Marking:
Components are not marked. Reels are marked with type, value, tolerance, date code and quantity.
Solvent resistance:
The body protection is resistance to all normal industrial cleaning solvents suitable for printed circuits.
Power Derating Data
100
Ordering Data
Prefix
Chip Type
PWC - PWC 2512LF - 100R - F
PWC
% Of Rated P ower
Chip Size and Termination
50
10
0805 = Sn/Pb solder termination
0805LF = 100% Tin (pb-free) termination
1206 = Sn/Pb solder termination
1206LF = 100% Tin (pb-free) termination
2010 = Sn/Pb solder termination
2010LF = 100% Tin (pb-free) termination
2512 = Sn/Pb solder termination
2512LF = 100% Tin (pb-free) termination
25°
70°
155°
Resistance Value
(Use
IEC62 code)
Tolerance Code
Temperature in °C
J = ±5%; F = ±1%; D = ±0.5%
For additional information or to discuss your specific requirements,
please contact our Applications Team using the contact details below.
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
PWC Series Issue January 2009
