WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860 · Boone, North Carolina 28607-1860 · Tel: 704-264-8861 · Fax: 704-264-8865 1
ISO-9001
Registered
D Dia.±0.002
0.032 (0.8)
0.036 (0.91)
0.036 (0.91)
0.036 (0.91)
0.036 (0.91)
0.036 (0.91)
0.036 (0.91)
0.040 (1.0)*
0.040 (1.0)*
IRC Type
PW-2
PW-3
PW-5
PW-7
PW-10
PW-15
PW-18
PW-22
PW-25
IRC Type
PW-2
PW-3
PW-5
PW-7
PW-10
PW-15
PW-18
PW-22
PW-25
GENERAL PURPOSE
PO WER WIREW OUND RESIST OR
PW SERIES
••
••
• 2 watts to 25 watts
• •
• •
• 0.10 ohms to 30K ohms
••
••
•
±10% or ±5% toler ance
••
••
•
TC's from 300 ppm/°C to +5500 ppm/°C
Made in Barbados
Fireproof high
temperature ceramic
case - stand offs
optional
Alloy resistance
wire on fiberglass
substrate
Automatically
clamped termination
lead assembly
Inorganic
fireproof
encapsulant
SPECIFICATIONS:
Power Rating
@ 25°C
(watts)
2
3
5
7
10
15
18
22
25
0.03%/°C
over R range
1.0 to 2.4K
1.0 to 7.5K1.0
to 8.5K
1.0 to 18K
1.0 to 30K
1.0 to 30K
1.0 to 22K
1.5 to 12K
1.5 to 10K
+0.55%/°C
over R range
0.1 to 30
0.1 to 86
0.1 to 68
0.1 to 150
0.1 to 240
0.1 to 240
0.1 to 200
0.15 to 360
0.15 to 300
+0.45%/°C
over R range
0.24 to 130
0.1 to 270
0.1 to 300
0.15 to 680
0.24 to 1100
0.24 to 1100
0.24 to 1100
0.36 to 1800
0.36 to 1200
+0.25%/°C
over R range
1.0 to 10
0.24 to 20
0.27 to 22
1.0 to 51
1.0 to 82
1.0 to 82
1.0 to 70
1.0 to 120
1.5 to 100
PW DIMENSIONS (Inches and (mm)):
Standard Temperature
Coefficient Special Temperature Coefficients
L±0.03 (0.8)
0.69 (17.5)
0.88 (22.4)
0.88 (22.4)
1.39 (35.3)
1.88 (47.8)
1.88 (47.8)
1.88 (47.8)
2.50 (63.5)
2.50 (63.5)
W±0.03 (0.8)
0.25 (6.35)
0.31 (7.87)
0.38 (9.65)
0.38 (9.65)
0.38 (9.65)
0.50 (12.7)
0.50 (12.7)
0.50 (12.7)
0.50 (12.7)
H±0.03 (0.8)
0.25 (6.35)
0.31 (7.87)
0.34 (8.64)
0.34 (8.64)
0.34 (8.64)
0.50 (12.7)
0.50 (12.7)
0.50 (12.7)
0.50 (12.7)
E±0.03 (0.8)
0.31 (7.87)
0.38 (9.65)
0.41 (10.4)
0.47 (11.9)
0.47 (11.9)
0.63 (16.0)
0.63 (16.0)
0.63 (16.0)
0.63 (16.0)
LL min.
1.44 (36.6)
1.44 (36.6)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
1.50 (38.1)
F (ref.)
0.063
0.063
0.063
0.125
0.125
0.125
0.125
0.125
0.125
*Copper Clad Steel Alternate Configuration
Standard Configuration
LL L
0.125
max.
H
W
D
E
F
POWER DERATING:
0 20 40 60 80 100 120
50
100
150
200
250
300 PW-22, 25
PW-15,18
PW-10
PW-7
PW-5
PW-3
TEMPERATURE RISE:
Temperature Rise (°C)
Percent of Rated Load
0 50 100 150 200 250
0
20
40
60
80
100
25 40 85
PW-2
PW-3, 5, 7, 10
PW-15, 18, 22, 25
Ambient Temperature (°C) Percent of Rated Load
HOW TO ORDER:
Sample Part No.: PW 18 12K 10%
IRC Type
Power
18 = 18watts
Resistance Value
(standard EIA values)
Tolerance
±10 or ±5% standard
Standard
Resistance
Range (ohms)
0.15 to 2.4K
0.1 to 7.5K
0.1 to 8.5K
0.1 to 18K
0.18 to 30K
0.18 to 30K
0.18 to 22K
0.27 to 18K
0.27 to 18K
0.06%/°C
over R range
0.15 to 0.99
0.1 to 0.99
0.1 to 0.99
0.1 to 0.99
0.18 to 0.99
0.18 to 0.99
0.18 to 0.99
0.27 to 1.3
0.27 to 1.3
Please note: When ordering the alternate configuration please add an 'A' after the part number. (i.e., PW-2A)
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860 · Boone, North Carolina 28607-1860 · Tel: 704-264-8861 · Fax: 704-264-8865
2
ISO-9001
Registered
B (±0.060)
2.50
2.55
3.00
3.625
A (±0.030)
1.875
2.00
2.45
3.075
Resistance
Range
(ohms)
0.1 - 2.0K
0.5 - 1.2K
0.65 - 1.5K
0.08 - 1.8K
IRC Type
PW-20E
PW-30
PW-40
PW-50E
GENERAL PURPOSE
POWER WIREWOUND
RESISTOR
PW SERIES
••
••
• 20 watts to 50 watts
••
••
•
0.10 ohms to 2.0K ohms
••
••
•
±10% or ±5% tolerance
• •
• •
•
Customs
Steatite
ceramic case
Tinned steel
Allow resistance wire on
fiberglass substrate
SPECIFICATIONS:
Power at
25°C
(watts)
20
30
40
50
-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 at 25°C: PO WER DERATING:
0 25 50 75 100 125
100
200
300
PW-50E
PW-20E
PW-40
PW-30
(without bracket)
0 50 100 150 200 250
0
20
40
60
80
100
PW-20E, PW-30, PW-40,
PW-50E without Bracket
Percent of Rated Load
Percent of Rated Load
Temperature Rise (°C)
Ambient Temperature (°C)
With Bracket:
PW-30 Increased to 40 watts
PW-40 Increased to 50 watts
PW-50 Increased to 60 watts
DIMENSIONS (Inches):
PW-30, 40 and 50E WirewoundPW-20E Wirewound
PW-20E Alternate
Terminal
Configuration -
0.020" Tin coated
Steel Printed Circuit Terminal
0.5±0.030
0.5±0.030
0.157±0.020
5/32 Dia. Thr u (2) 0.250 (Typ.)
0.032±0.0025
BB
A
A
0.032±0.0025
0.25
0.375 0.75
7/32 Dia.
0.875
0.75±0.030
0.75±0.030
5/32 Dia. Thr u (2)
0.282±0.020
0.205 or
0.187±0.005
0.25±0.031
0.069±0.005
0.125±0.015 0.200 (Typ.)
0.135±0.015
IRC Type
PW-20E
PW-30
PW-40
PW-50E
WIRE AND FILM TECHNOLOGIES
736 Greenway Road · PO Box 1860 · Boone, North Carolina 28607-1860 · Tel: 704-264-8861 · Fax: 704-264-8865 3
ISO-9001
Registered
PW -15E DIMENSIONS (Inches):
0.250±0.020
1.106±0.050
*Meniscus allowable to the termination edge
0.900±0.050
0.205±0.020
0.062 Rad. (2)
0.290±0.030
0.685±0.060 1.000±0.040
0.020
0.060 Dia. (2)
0.187±0.020 0.020
0.900±0.050
*See Meniscus Note
2.375±0.040
3.000±0.040
0.500±0.040
0.313±0.050
0.500±0.030
0.155±0.005
0.125 Rad. (Ref.)
0.273±0.010 Dia.
0.375±0.040 0.709
±0.030
0.750±0.05
0.020
0.250 min.
2.000±0.040
1.410±0.040
0.500±0.030
1.050 min.
0.060 Dia. (2)
0.840±0.040
0.500±0.030
0.187±0.010
0.250 Terminal (0.032 Thk.) 0.205 Terminal (0.020 Thk.)
Special PW Power Wireounds
PW -30E DIMENSIONS (Inches):
