Features
■ D
2PAK housing
■ Low inductance
■ Resistor electrically isolated from the
backplate
■ High power rating
■ Compatible with lead free solder refl ow
temperatures
■ RoHS compliant*
Applications
■ Power supplies
■ Motor drives
■ Test and measurement
■ Rectifi ers
Electrical & Thermal Characteristics
PWR263S-20 Series Power Resistor
*RoHS COMPLIANT
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
General Information
Bourns® PWR263S-20 Series is a TO263 DPAK style power resistor manufactured using thick fi lm on alumina ceramic technology
and used in current measurement, snubber, bleeder and discharge circuits.
Parameter Value(s)
Resistance
(See Popular Resistance Values table)
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 fi lm
Substrate ..................... Alumina (AL203)
Housing ........................................Epoxy
Pins....................Tinned Copper (Sn/Cu)
Flammability ........ Conforms to UL-94V0
Power Derating Curve
Reliability Characteristics
Parameter Specifi 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
Rated Power (%)
Case Temperature (°C)
100
120
75
50
25
0
020 806040 100 120 140 155
** Available for most values. Check Popular Resistance Values table.
Popular Resistance Values
Code Resistance
Value Code Resistance
Value
R020 0.02 Ω*** 1000 100 Ω
R025 0.025 Ω*** 1200 120 Ω
R030 0.03 Ω*** 1500 150 Ω
R033 0.033 Ω*** 2000 200 Ω
R040 0.04 Ω*** 2500 250 Ω
R050 0.05 Ω*** 3000 300 Ω
R075 0.075 Ω*** 3300 330 Ω
R100 0.1 Ω 4000 400 Ω
R150 0.15 Ω 4700 470 Ω
R200 0.2 Ω 5000 500 Ω
R250 0.25 Ω 5600 560 Ω
R300 0.3 Ω 7500 750 Ω
R330 0.33 Ω 1001 1.0 KΩ
R400 0.4 Ω 1501 1.5 KΩ
R500 0.5 Ω 2001 2.0 KΩ
R750 0.75 Ω 2501 2.5 KΩ
1R00 1 Ω 3001 3.0 KΩ
1R50 1.5 Ω 3301 3.3 KΩ
2R00 2 Ω 4001 4.0 KΩ
2R50 2.5 Ω 5001 5.0 KΩ
3R00 3 Ω 7501 7.5 KΩ
3R30 3.3 Ω 1002 10 KΩ
4R00 4 Ω 1502 15 KΩ
5R00 5 Ω 2002 20 KΩ
7R50 7.5 Ω 2502 25 KΩ
8R00 8 Ω 3002 30 KΩ
10R0 10 Ω 3302 33 KΩ
12R0 12 Ω 4002 40 KΩ
15R0 15 Ω 4702 47 KΩ
20R0 20 Ω 5002 50 KΩ
25R0 25 Ω 5602 56 KΩ
27R0 27 Ω 6802 68 KΩ
30R0 30 Ω 7502 75 KΩ
33R0 33 Ω 8202 82 KΩ
40R0 40 Ω 1003 100 KΩ
47R0 47 Ω 1153 115 KΩ
50R0 50 Ω 1203 120 KΩ
56R0 56 Ω 1253 125 KΩ
75R0 75 Ω 1303 130 KΩ
*** 5 % Tolerance
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
PWR263S-20 Series Power Resistor
DIMENSIONS: MM
(INCHES)
Soldering Profi 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
signifi cant, 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)
5.08
(0.20)
12
BACKPLANE
ELECTRICALLY
ISOLATED
1.3
(.051)
1.4
(0.055)
1.92
(0.076)
0.25
(0.010)
48 °
1.6
(0.063)
15.39
(0.606)
8.8
(0.347)
10.4
(0.409)
REF.
10.
5
(0.4
1
3.1
(0.122)
4.5
(0.177)
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>
8.0
(.315)
11.0
(.433)
2.4
(0.095)
0.26
(0.10)
4.23
(0.166)
4.02
(0.158)
10.52
(0.414)
2.25
(0.089)
Typical Part Marking
263 20
XXXX X%
YYY
COSTA RICA
MODEL
NUMBER
TOLERANCE
DATE CODE
COUNTRY
OF ORIGIN
RESISTANCE
CODE
MANUFACTURER'S
TRADEMARK
REV. 07/12
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
PWR263S-20 Series Power Resistor
Packaging Specifi 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
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
