SPP Datasheet, PDF (1/2 Pages) Welwyn Components Limited – General Purpose Wirewound Resistors

General Purpose
Wirewound Resistors
SPP Series
• 0R1 to 2K4 ohms
• ^{Positive high TC’s upon request}
• ^{Weldable and solderable magnetic leads}
• ^{Lower ranges available - contact factory}
Welwyn Components
Electrical Data
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
SPP-1
ohms
0R1 - 1K2*
±%
5, 10
1 @ 85°C
watts
0.75 @ 105°C
0.5 @ 125°C
Derating to 0 @ 160°C
watts 1 @ 85°C ± 10%
Approx. 150°C
SPP-2
0R1 - 2K4
5, 10
2 @ 85°C
1 @ 140°C
-
-
2 @ 85°C ± 10%
√PR
10,000 megohm
100 megohm
600 volts RMS
Negligible
Approx. 200°C
Note: Unless specified otherwise standard test centres are 1³/4 inches.
Physical Data
Dimensions (inches)
Type
A max
SPP-1
0.400
SPP-2
0.570
SPP-3
0.570
B max
0.148
0.170
0.170
C±0.002
0.032
0.032
0.032
B
1.125 min
A
max.
SPP-3
0R1 - 2K4
5, 10
3 @ 85°C
2 @ 145°C
1 @ 190°C
-
3 @ 85°C ± 10%
Approx. 225°C
C
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.
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.
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 · Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
Issue B · 03.02
97