Semi-Precision Power
Semi-Precision Power
Semi-Precision Power
Wirewound Resistors
Wirewound Resistors
Wirewound Resistors
Welwyn Components
Welwyn Components
PPW PPW Series
Series
PPW Series
IdealIdeal for pulse applications
• for pulse and surgesurge
• Ideal for 15 wattsandand surge
pulse
2 watts to
applications
applications
Resistance toto 15ohms to 5K ohms
• 2 watts 0R1 watts
watts
• 2 watts to 15 ±1% tolerance
±3%, ±2% or to 0R1 ohms to 5K ohms
• Resistance ohms to 5K ohms
• Resistance to 0R1
±20 ppm/°C TCR
• ±3%, ±2% or ±1% tolerance
• ±3%, ±2% or ±1% tolerance
• ±20 ppm/°C TCR
• ±20 ppm/°C TCR
·
·
·
·
·
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
1000V
1000V
500V
500V
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
600V
600V
300V
300V
1000 2000 3000
1000 2000 10x360µsec
1000 Volts 3000
1000 Volts 10x360µsec
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
Welwyn
reserves
right
product specification without
General NoteComponents the right themake to make changes in specification without notice ornotice or liability.
Welwyn Components reserves
to
changes in product
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 theto 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 subjectComponents 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
Issue B · 03.02
Telephone: +44 (0) 1670 822181 Bedlington, Northumberland NE22 7AA, UK
Issue B · 03.02
Telephone: +44 (0) 1670
© TT electronics plc822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
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