Semi-Precision Power
Semi-Precision
Power
Semi-Precision
Power
Wirewound Resistors
Wirewound
Resistors
Wirewound
Resistors
PPW
PPW Series
Series
PPW Series
Ideal
Ideal for pulse
applications
•
for pulse and surge
surge
•
Ideal for
15 watts
andand surge
pulse
2 watts to
applications
applications
Resistance to
to 15
ohms to 5K ohms
•
2 watts
0R1
watts
watts
•
2 watts to 15
±1% tolerance
±3%, ±2% or
to 0R1 ohms to 5K ohms
Resistance
•
•
Resistance to 0R1 ohms to 5K ohms
±20 ppm/°C TCR
•
±3%, ±2% or ±1% tolerance
•
±3%, ±2% or ±1% tolerance
•
±20 ppm/°C TCR
•
±20 ppm/°C TCR
Welwyn Components
Welwyn Components
·
·
·
·
·
Electrical Data
Electrical Data
Power rating at 25°C
Power rating at 25°C
Resistance range
Resistance range
PPW-2
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
PPW-2
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
watts
2
3
5
7
10
15
watts
2
3
5
7
10
15
ohms 0R1 to 1K6 0R1 to 1K6 0R1 to 1K6 0R1 to 2K5 0R1 to 5K 0R1 to 5K
ohms 0R1 to 1K6 0R1 to 1K6 0R1 to 1K6 0R1 to 2K5 0R1 to 5K 0R1 to 5K
Please note: When ordering the alternate configuration please add an ‘A’ after the part number (ie. PPW-3A)
Please note: When ordering the alternate configuration please add an ‘A’ after the part number (ie. PPW-3A)
Lighting Surge Capabilities PPW-2
Lighting Surge Capabilities for for PPW-2
Resistive range
Resistive range
1R to 9R9
1R to 9R9
10R to 29R9
10R to 29R9
30R to 99R
30R to 99R
100R to 1K6
100R to 1K6
ohms
ohms
10 x 1000*
10 x 1000*
250V
250V
500V
500V
600V
600V
1000V
1000V
10 x 360*
10 x 360*
650V
650V
850V
850V
1000V
1000V
1500V
1500V
1000V
1000V
500V
500V
1000 2000 3000
1000 2000 10x360µsec
1000 Volts 3000
1000 Volts 10x360µsec
600V
600V
300V
300V
1000 2000 3000
1000 2000 10x1000µsec
600 Volts 3000
600 Volts 10x1000µsec
*10 microseconds – Maximum rise time to peak voltage.
*10 microseconds – Maximum riseminimum decay time to one half peak.
360 or 1000 microseconds - time to peak voltage.
360 or 1000 microseconds - minimum decay time to one half peak.
General Note
General Note
Components reserves the right to make changes in product specification without notice or liability.
Welwyn
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
TT electronics reserves the
to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
All information is subject
right to make changes in product specification without notice or liability.
TT electronics plc
All information is subject
Components Limited
and is considered accurate at time of
7AA, UK
print.
TT electronics plc
© Welwyn
to TT electronics’ own data
· Bedlington, Northumberland NE22
going to
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited
· ·Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Bedlington, Northumberland NE22 7AA, UK
Issue B · 03.02
Telephone: +44 (0) 1670 822181
Issue B · 03.02
Telephone: +44 (0) 1670
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
11. 11
115
115
Semi-Precision Power
Semi-Precision Power
Wirewound Resistors
PPW Series
Wirewound Resistors
PPW Series
Welwyn Components
Physical Data
Dimensions (mm)
Standard Configuration
d
25.4
min
Type
PPW-2
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
Alternate Configuration
W
H
L
3.17 max.
E
L ± 0.8
1705
22.3
22.3
35.3
47.7
47.7
W ± 0.8
6.99
7.87
9.65
9.65
9.65
12.7
H ± 0.8
6.99
7.87
8.89
8.89
8.89
12.7
d dia.
0.8
0.8
0.8
0.8
0.8
0.8
E ± 0.8
8.134
9.65
10.4
11.9
11.9
12.7
Temperature Rise
Power Derating
PPW-15
PPW-10
PPW-7
PPW-5
PPW-3
PPW-2
100
80
25 40
65
PPW-2
PPW-3, 5, 7, 10
PPW-15
Hot Spot Temperature (°C)
250
200
150
100
50
0
0
20
40
60
80
100
% Rated Load
60
150
40
20
0
0
Max. Recommended
Ambient Operating
Temperature 150°C
120
% Rated Load
50
100
150
200
Ambient Temperature (°C)
250
Ordering Procedure
Example: PPW5 at 110 ohms and 1% tolerance in bulk pack
–
PPW5
–
110RF
I
Type
Configuration
A
Standard
Alternate
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
G
Note: 1 & 3% preferred
1%
2%
H
3%
Packing
I
Bulk
Standard
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
General Note
116
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue B · 03.02
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.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
11. 11
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