Resistors
General Purpose Radial Terminal
Power Wirewound Resistor
General Purpose
PW Radial Series
Radial Terminal
OBSOLETE
0.10 to 2.0K
Power
50 watts
20 watts to
Wirewound Resistor
PW Radial Series
•
•
•
±10% or ±5% tolerance
•
RoHS compliant construction available
•
Custom parts available - consult factory
±10% or ±5% tolerance
RoHS compliant construction available
0.10Ω to 2.0KΩ
Custom
50 watts
20 watts to
parts available - consult factory
Inorganic
fireproof
encapsulant
Tinned steel
Steatite
ceramic case
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Alloy resistance wire on
fiberglass substrate
Electrical Data
Type
PW-20E
PW-30
PW-40
PW-50E
- 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.
Power Rating @ 25°C
(watts)
20
30
40
50
Resistance
Range (ohms)
0.1 to 2.0K
0.5 to 1.2K
0.65 to 1.5K
0.08 to 1.8K
Temperature Rise Chart
300
Power Derating Curve
100
Temperature Rise (°C)
PW - 50E
200
PW - 40
100
PW - 30
Percent of Rated Load
PW - 20E
80
60
40
20
0
PW - 20E, PW - 30, PW - 40
PW - 50E without Bracket
0
0
25
50
75
100
Percent of Rated Load
125
0
50
100
150
200
Ambient Temperature (°C)
With Bracket:
PW-30 Increased to 40 watts
PW-40 Increased to 50 watts
PW-50 Increased to 60 watts
250
General Note
General Note
IRC reserves the right to make changes in product specification without notice or liability.
TT Electronics reserves the
own data and is
changes in product specification without notice or liability.
All information is subject to IRC’s
right to make
considered accurate at time of going to print.
Telephone:
361 992 7900 •
Facsimile:
361 992 3377 •
Website: www.irctt.com
BI Technologies IRC Welwyn
TT electronics plc
www.ttelectronicsresistors.com
PW Radial Series Issue March 2011 Sheet 1 of 2
A subsidiary of
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
© TT Electronics plc
07.19
Resistors
General Purpose
General Purpose Radial Terminal Power Wirewound Resistor
Radial Terminal
PW Radial Series
OBSOLETE
Power Wirewound Resistor
Physical Data
PW-20E Wirewound
0.250 (Typ.)
5/32 Dia. Thru (2)
A
0.032±0.0025
0.157±0.020
0.5±0.030
PW-30, 40 and 50E Wirewound
A
0.282±0.020
5/32 Dia. Thru (2)
0.032±0.0025
0.75±0.030
0.25
B
0.5±0.030
0.75±0.030
0.875
0.375
0.75
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.)
0.25±0.031
0.069±0.005
0.135±0.015
Dimensions (Inches)
Type
PW-20E
PW-30
PW-40
PW-50E
A
1.875 ±0.030
2.00 ±0.030
2.45 ±0.030
3.075 ±0.030
B
2.5 ±0.060
2.55 ±0.060
3.00 ±0.060
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.
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
© TT Electronics plc
07.19
Resistors
General Purpose Radial Terminal Power Wirewound Resistor
PW Radial Series
OBSOLETE
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
1
1
Type
2
Bracket
0
E
B
R
2
3
Value
K
-
1
K
3
4
J = ±5%
K = ±10%
2
K
4
I
5
5
I = Standard packing & Pb-free
Bulk pack
Tolerance Packing & Termination Finish
PW20E BRK = with bracket R = ohms
PW30 Omit if not required K = kilohms
PW40
PW50E
USA (IRC) Part Number: PW50EBRK1201KLF
(PW50E with bracket, 1.2 kilohms ±10%, Pb-free)
P
W
5
1
1
Type
2
Bracket
0
E
B
R
2
3
Value
K
1
2
3
0
1
K
4
4
L
5
5
Omit for SnPb
LF = Pb-free
Bulk pack
F
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
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.
BI Technologies IRC Welwyn
www.ttelectronicsresistors.com
© TT Electronics plc
07.19
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