Resistors
Make Possible
General Purpose Radial Terminal
Power Wirewound Resistor General Purpose
PW
Radial SeriesTerminal
Radial
0.10 to 2.0K
Power
Wirewound
Resistor
20 watts to 50
watts
±10% or ±5% tolerance
RoHStocompliant
construction available
• 0.10Ω
2.0KΩ
available - consult factory
• 20Custom
watts toparts
50 watts
PW Radial Series
Inorganic
fireproof
encapsulant
Tinned steel
Steatite
ceramic case
• ±10% or ±5% tolerance
• RoHS compliant construction available
• Custom parts available - consult factory
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Alloy resistance wire on
fiberglass substrate
Electrical Data
Power Rating @ 25°C
(watts)
Resistance
Range (ohms)
PW-20E
20
0.1 to 2.0K
PW-30
30
0.5 to 1.2K
PW-40
40
0.65 to 1.5K
PW-50E
50
0.08 to 1.8K
Type
- Flameproof inorganic construction
- EIA RS-344, insulated fixed wirewound resistors
- 1000 hour load life at 25°C: 5% max.
- Moisture no load 240 hours: 2% max.
- Temperature cycling (5 cyc.): 5% max.
Temperature Rise Chart
Power Derating Curve
100
PW - 50E
PW - 20E
200
PW - 40
100
0
0
PW - 30
25
50
75
100
Percent of Rated Load
Percent of Rated Load
Temperature Rise (°C)
300
125
PW - 20E, PW - 30, PW - 40
PW - 50E without Bracket
80
60
40
20
0
0
50
100
150
200
Ambient Temperature (°C)
250
With Bracket:
PW-30 Increased to 40 watts
PW-40 Increased to 50 watts
PW-50 Increased to 60 watts
General
GeneralNote
Note
IRC reserves the right to make changes in product specification without notice or liability.
TTinformation
Electronics
reserves
the right
to make
changes accurate
in product
specification
without notice or liability.
All
is subject
to IRC’s
own data
and is considered
at time
of going to print.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
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
© TT Electronics plc
A subsidiary of
TT electronics plc
www.ttelectronicsresistors.com
PW Radial Series Issue March 2011 Sheet 1 of 2
07.14
General Purpose
Radial
Terminal
PW Radial Series
Power Wirewound Resistor
General Purpose Radial Terminal
Power Wirewound Resistor
Make Possible
Physical Data
PW-20E Wirewound
PW-30, 40 and 50E Wirewound
0.250 (Typ.)
5/32 Dia. Thru (2)
A
A
0.032±0.0025
0.282±0.020
0.032±0.0025
0.157±0.020
5/32 Dia. Thru (2)
0.5±0.030
0.75±0.030
0.25
B
0.375
0.75±0.030
0.75
0.875
0.5±0.030
7/32 Dia.
PW-20E Alternate
Terminal
Configuration
-0.020" Tin coated Steel
Printed Circuit Terminal
0.205 or
0.187±0.005
0.125±0.015
0.200 (Typ.)
0.135±0.015
0.25±0.031
0.069±0.005
Dimensions (Inches)
Type
A
B
PW-20E
1.875 ±0.030
2.5 ±0.060
PW-30
2.00 ±0.030
2.55 ±0.060
PW-40
2.45 ±0.030
3.00 ±0.060
PW-50E
3.075 ±0.030
3.625 ±0.060
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
PW Radial Series Issue March 2011 Sheet 2 of 2
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
www.ttelectronicsresistors.com
© TT Electronics plc
07.14
General Purpose Radial Terminal
Power Wirewound Resistor
Make Possible
PW Radial Series
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: PW50EBRK-1K2KI (PW50E with bracket, 1.2 kilohms ±10%, Pb-free)
P
W
5
0
E
B
1
R
K
-
1
K
2
2
3
1
2
3
Type
Bracket
Value
K
I
4
5
4
5
Tolerance Packing & Termination Finish
PW20E BRK = with bracket R = ohms
PW30 Omit if not required K = kilohms
PW40
PW50E
J = ±5%
K = ±10%
I = Standard packing & Pb-free
Bulk pack
USA (IRC) Part Number: PW50EBRK1201KLF (PW50E with bracket, 1.2 kilohms ±10%, Pb-free)
P
W
5
0
E
1
B
R
K
1
2
2
0
3
1
2
3
Type
Bracket
Value
1
K
4
L
F
5
4
5
Tolerance Packing & Termination Finish
PW20E BRK = with bracket 3 digits + multiplier
J = ±5%
PW30 Omit if not required R = ohms for values K = ±10%
<100 ohms
PW40
PW50E
Omit for SnPb
LF = Pb-free
Bulk pack
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
www.ttelectronicsresistors.com
© TT Electronics plc
07.14
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