SPP WELWYN [Welwyn Components Limited], SPP Datasheet
SPP
Manufacturer Part Number
SPP
Description
General Purpose Wirewound Resistors
Manufacturer
WELWYN [Welwyn Components Limited]
Datasheet
1.SPP.pdf
(2 pages)
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Fuse/Pulse Applications
SPP resistors normally fuse in less than one minute with five
to ten times rated wattage depending on the range. By
modifying the windings, using a different wire size or type,
they can be made to fuse much faster.
General Purpose
Wirewound Resistors
SPP Series
•
•
•
•
Electrical Data
Note: Unless specified otherwise standard test centres are 1
Physical Data
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Type
Resistance range
Standard Tolerance
Power Rating
Load Life Stability
Max. Continuous Working Voltage
Min. Insulation Resistance - Dry
Min. Insulation Resistance - Wet
Min. Dielectric Withstanding Voltage
Current Noise
Temperature Rise at Rated Load, 25°C Ambient
Dimensions (inches)
Type
SPP-1
SPP-2
SPP-3
0R1 to 2K4 ohms
Positive high TC’s upon request
Weldable and solderable magnetic leads
Lower ranges available - contact factory
A max
0.400
0.570
0.570
· Bedlington, Northumberland NE22 7AA, UK
B max
0.148
0.170
0.170
C±0.002
0.032
0.032
0.032
3
ohms
watts
watts
/
±%
4
inches.
On the other hand, by using larger wire diameters and higher
melt temperature alloys they can handle from five to fifty
times overloads of film resistors depending on the range.
Derating to 0 @ 160°C
1 @ 85°C ± 10%
Approx. 150°C
0.75 @ 105°C
0.5 @ 125°C
0R1 - 1K2*
1 @ 85°C
SPP-1
5, 10
B
1.125 min
2 @ 85°C ± 10%
10,000 megohm
Approx. 200°C
600 volts RMS
100 megohm
1 @ 140°C
0R1 - 2K4
2 @ 85°C
Negligible
Welwyn Components
SPP-2
5, 10
max.
PR
-
-
A
3 @ 85°C ± 10%
Approx. 225°C
2 @ 145°C
1 @ 190°C
0R1 - 2K4
3 @ 85°C
C
SPP-3
TT electronics plc
5, 10
A subsidiary of
Issue B · 03.02
-
97
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SPP Summary of contents
Page 1
... SPP-3 0.570 0.170 Fuse/Pulse Applications SPP resistors normally fuse in less than one minute with five to ten times rated wattage depending on the range. By modifying the windings, using a different wire size or type, they can be made to fuse much faster. General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. ...
Page 2
... General Purpose Wirewound Resistors SPP Series Performance Data Temperature Coefficient Thermal Shock Low Shock Short Time Overload Commercial Short Time Overload Resistance to Solder Immersion Solderability Moisture Resistance Life Test Test Method Power Derating: 100 SPP SPP- 100 ...