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