Features
n D2PAKhousing
n Lowinductance
n Resistorelectricallyisolatedfromthe
backplate
n Highpowerrating
n Compatiblewithleadfreesolderreow
temperatures
n RoHScompliant*
Applications
n Powersupplies
n Motordrives
n Testandmeasurement
n Rectiers
Electrical & Thermal Characteristics
PWR263S-20SeriesPowerResistor
*RoHSCOMPLIANT
LEADFREE
*RoHSCOMPLIANT
VERSIONS
AVAILABLE
LEADFREE
VERSIONSARE
RoHSCOMPLIANT*
*RoHSDirective2002/95/ECJan27,2003includingAnnex.
Specicationsaresubjecttochangewithoutnotice.
Customersshouldverifyactualdeviceperformanceintheirspecicapplications.
General Information
Bourns® PWR263S-20 Series is a TO263 DPAK style power resistor. Manufactured using thick film on alumina ceramic technology, it
is used in current measurement, snubber, bleeder and discharge circuits.
Parameter Value(s)
Resistance
(See table of standard values)
0.02 Ω to 130 KΩ
Power Rating @ 25 ˚C Case Temperature 20 W
Tolerance ±1 %**, ±5 %
TCR
0.02 Ω<R<130.0K Ω
±100 PPM/˚C
Thermal Resistance - Rthj 6.5 ˚C/W
Inductance 0.1 µH maximum
Operating Voltage √P*R with a maximum of 250 V
Dielectric Strength 2 KV AC
Insulation Resistance 10 GΩ
Operating Temperature -55 ˚C to 155 ˚C
Material Characteristics
Resistor .................................. Thick film
Substrate ......................Alumina (AL203)
Housing ........................................Epoxy
Pins ....................Tinned Copper (Sn/Cu)
Flammability ........Conforms to UL-94V0
Derating Curve
Reliability Characteristics
Parameter Specication
Short Term Overload (2x Pr for R < 2 Ω,
1.6 x Pr for R ≥ 2 Ω, V < 1.5 x Operating Voltage)
ΔR ±0.25 %
Load Life (1000 hours at rated power) ΔR ±1.0 %
Thermal Shock (-55 ˚C to 155 ˚C, 5 cycles) ΔR ±0.5 %
Resistance to Soldering Heat (10 seconds at 270 ˚C) ΔR ±0.5 %
Vibration (20 G 10-2000 Hz .06 ” D.A.) ΔR ±0.25 %
Moisture Sensitivity Level 1
Power Ratio (%)
Temperature of Backplate (°C)
100
120
80
60
40
20
0
25 50 11510085 130 145 155
Typical Part Marking
263 20
XXXX X%
YYY
COSTA RICA
MODEL
NUMBER
TOLERANCE
DATE CODE
COUNTRY
OF ORIGIN
RESISTANCE
CODE
MANUFACTURER'S
TRADEMARK
Standard Resistance Values
Code
Resistance
Value Code
Resistance
Value
R020 0.02*** 20R0 20
R050 0.05*** 30R0 30
R100 0.1 33R0 33
R500 0.5 47R0 47
R750 0.75 50R0 50
1R00 1 56R0 56
1R50 1.5 75R0 75
2R00 2 1000 100
2R20 2.2 2000 200
2R50 2.5 3300 330
3R00 3 4700 470
3R30 3.3 7500 750
4R70 4.7 1001 1000
5R00 5 3301 3300
7R50 7.5 1002 10000
8R20 8.2 3002 33000
10R0 10 1003 100000
15R0 15 1303 130000
** Available for most values. Check Standard Resistance Values table.
*** 5 % Tolerance
Specicationsaresubjecttochangewithoutnotice.
Customersshouldverifyactualdeviceperformanceintheirspecicapplications.
PWR263S-20SeriesPowerResistor
DIMENSIONS: MM
(INCHES)
Soldering Prole
PWR 263 S - 20 - 10R0 F E
Model
PWR = Power
Resistor
Package
263 = D2PAK
Pin Style
S = Surface Mount
Power
20 = 20 W
Resistance Value
<100 ohms ... “R” represents decimal
point (examples: 7R50 =
7.5 Ω; R500 = 0.5 Ω)
≥100 ohms ... First three digits are
significant, fourth digit
represents number of
zeros to follow (exam-
ples: 2000 = 200 ohms;
3002 = 30K ohms)
Absolute Tolerance
J = 5 %
F = 1 %
Packaging
E = Tape & Reel
Blank = Tubes
How to Order
Power dissipation is 2.8 W at an ambient temperature of 25 ˚C when mounted on a
double-sided copper board using FR4 standard, 70 µm of copper, 39 x 30 x 1.6 mm.
Product Dimensions
7.8
(0.307)
10.1
(0.398)
8.0
(.315)
11.0
(.433)
5.08
(0.20)
1.3
(.051)
1.4
(0.055)
1.92
(0.076)
0.25
(0.010) 2.4
(0.095)
0.26
(0.10)
4.23
(0.166)
48 °
1.6
(0.063)
4.02
(0.158)
15.39
(0.606)
8.8
(0.347)
10.4
(0.409)
REF.
10.52
(0.414)
3.1
(0.122)
4.5
(0.177)
2.25
(0.089)
TOLERANCE: ±0.38 UNLESSOTHERWISENOTED
(±0.015)
LEAD 0.102 MAXATMOUNTING
COPLANARITY: (0.004) SURFACE
Recommended Pad Layout
25
75
125
175
225
275
0 50 100 150 200 250 300
Time(seconds)
Temperature(°C)
60-120seconds
60-90
seconds
260°Cpeak
190°C
150°C
220°C
RampDown
6°C/second
245°C
Maximumof20secondsbetween
+245°Cand+260°C
RampUp
3°C/secondmaximum
10secondsminimum
<1>
<1>
7.8
(0.307)
10.1
(0.398)
8.0
(.315)
11.0
(.433)
5.08
(0.20)
1.3
(.051)
1.4
(0.055)
1.92
(0.076)
0.25
(0.010) 2.4
(0.095)
0.26
(0.10)
4.23
(0.166)
48 °
1.6
(0.063)
4.02
(0.158)
15.39
(0.606)
8.8
(0.347)
10.4
(0.409)
REF.
10.52
(0.414)
3.1
(0.122)
4.5
(0.177)
2.25
(0.089)
REV. 09/11
Specicationsaresubjecttochangewithoutnotice.
Customersshouldverifyactualdeviceperformanceintheirspecicapplications.
PWR263S-20SeriesPowerResistor
Packaging Specications
0.5 ± 0.18
(0.020 ± 0.007)
0.38 ± 0.20
(0.015 ± 0.008)
24.0
(0.945)
5.3
(0.209)
DIMENSIONS: MM
(INCHES)
TOLERANCE: ±0.38 UNLESSOTHERWISENOTED
(±0.015)
Pulse Power Rating
Energy in Joules
Overload Duration in Seconds
10
100
1
0.1
0.01
10- 7 10-6 10 -5 10-4 10- 3 10-2 10 -1
The energy absorbed by the resistor expressed in Joules can be calculated by multiplying the peak power of the pulse in watts times
the length of the pulse in seconds.
The energy should not exceed the limits shown in the graph. The overload voltage should not exceed 1.5 times the maximum
operating voltage.
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Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
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www.bourns.com