High Power Dissipation
SMT Chip Resistor
SC3 Series
•
•
•
•
Tolerances to ±1%
3 watt rating at 70°C
Resistance range from 1 to 100KΩ
Standard Sn/Pb and matte tin (Pb-free) terminations available
Electrical Data
Resistance Range
Resistance Tolerance
Temperature Coefficient
Power Dissipation
Maximum Voltage Rating
_____
(not to exceed
√
P X R )
Operating Temperature
Range
Termination
1Ω to 100KΩ
±1%, ±2%, ±5%
±100 ppm/°C
3.0 Watts* @70°C
100 Volts
-55°C to +150°C
Leach-resistant nickel barrier
under solder-plated wrap-
around
Power Derating Chart
100
% Of Rated Power
50
10
25°
70°
150°
Temperature in °C
*Note: With 1” square copper area as heat spreader.
Physical Data
Top
TOP
0.020”±.005”
Bottom
BOTTOM
(Board Side)
Recommended solder pad layout
RECOMMENDED SOLDER
PAD LAYOUT
0.032” ±.005”
0.30”
7
.6mm
0.250” ± .005”
33R0
Plating
wrap-around
0.090” ±.005”
0.030” ±.005”
thickness
0.08”
(2.0mm)
0.125” ±.005”
Schematic
SCHEMATIC
0.04”
(1mm)
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
TT electronics plc
SC3 Series Issue July 2008
High Power Dissipation
SMT Chip Resistor
Temperature Rise vs Pad Area
1000
Temper ture Rise (°C)
a
100
10
2
100mm
200mm
2
1000mm
2
Termination Pad Area (each end)
1 watt
2 watts
3 watts
Pulse Power Rating
100
Power (watts)
10
1
0.1
1.0
Time (sec)
10.0
Advanced Film Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
SC3 Series Issue July 2008
High Power Dissipation
SMT Chip Resistor
Environmental Data
Environmental Test
Thermal Shock
Short-time Overload
High Temperature Exposure
Moisture Resistance
Load Life
Low Temperature Operation
Resistance To Solder Heat
Solderability
Test Method
MIL-STD-202 Method 107
Condition B, -65°C + 125°C
2x rated power for 5 seconds
100 Hours, 150°C
MIL-STD-202 Method 106
Rated Power @ 70°C for 1000 hours;
1.5 hours ‘on’, 0.5 hours ‘off’
1 hour @ -65°C followed by
Rated power for 45 minutes
MIL-STD-202 Method 210
260°C, 5 seconds
MIL-STD-202 Method 208
245°C, 5 seconds
Specification
∆R
±0.5% + 0.01Ω
∆R
±0.5% + 0.01Ω
∆R
±0.5% + 0.01Ω
∆R
±0.5% + 0.01Ω
∆R
±1.0% + 0.01Ω
∆R
±0.5% + 0.01Ω
∆R
±0.25% + 0.01Ω
95% coverage
Ordering Data
Prefix
SCW
-
SC3LF -
33R0
-
F
Model
SC3 = 3 watt chip with standard Sn/Pb termination
SC3LF = 3 watt chip with matte tin (Pb-free) termination
Resistance Code
Standard 4-digit resistance code
Example: 33R0 = 33Ω; 10K0 = 10,000Ω
Resistance Tolerance Code
J = ±5%; G = ±2%; F = ±1%
Packaging
Available in both bulk and tape & reel.
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
SC3 Series Issue July 2008
