1
ISO-9001
Registered
C±.002
0.032
0.032
0.032
±300/°C
1Ω-1200Ω
SPP-1
0.1 - 1200*
5, 10
1W @ 85°C
3/4W @ 105°C
1/2W @ 125°C
Derating to 0 @ 160°C
1W @ 85°C ±10%
√PR
10,000 megohm
100 megohm
600 volts RMS
Negligible
Approx. 150°C
IRC Type
Standard Resistance (ohms)
Standard Tolerance (±%)
Power Rating (watts)
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
Temperature Coefficient
LOW-COST GENERAL PURPOSE
CONFORMAL COATED WIREWOUND
RESISTOR
SPP SERIES
• •
• •
•
Color band standard identification
••
••
•
Coated or uncoated units
••
••
• Positive high TC's upon request
••
••
•
Weldable and solderable magnetic leads
• •
• •
• Lower r anges available - contact f actory
Allo y resistance
wirewound on
fiberglass core
EIA/MIL color code:
first wide band indicates
wirewound construction,
blue indicator indicates
flameproof.
Mechanically crimped
termination assembly.
SPECIFICATIONS:
±600/°C
0.10Ω-0.91Ω
SPP-2
0.1 - 2400
5, 10
2W @ 85°C
1W @ 140°C
---
---
2W @ 85°C ±10%
√PR
10,000 megohm
100 megohm
600 volts RMS
Negligible
Approx. 200°C
±600/°C
0.10Ω-0.91Ω±300/°C
1Ω-2400Ω
SPP-3
0.1 - 2400
5, 10
3W @ 85°C
2W @ 145°C
1W @ 190°C
---
3W @ 85°C ±10%
√PR
10,000 megohm
100 megohm
600 volts RMS
Negligible
Approx. 225°C
±600/°C
0.10Ω-0.91Ω±300/°C
1Ω-2400Ω
NOTE: Unless specified otherwise standard test centers are 1 3/4 inches.
B
A
max.
C
1.125
min.
IRC Type
SPP-1
SPP-2
SPP-3
A
0.400 max.
0.570 max.
0.570 max.
B
0.148 max
0.170 max
0.170 max
DIMENSIONS (Inches):
FUSE/PULSE APPLICA TIONS:
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.
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
2
ISO-9001
Registered
SPP CHARACTERISTICS:
Temperature Coefficient
Thermal Shock
Low Shock
Short Time Overload
Commercial Short Time Overload
Resistance to Solder Immersion
Solderability
Moisture Resistance
Life Test
Test Method
SPP-1 ±600/°C 0.10Ω−0.91Ω
±300/°C 1.0Ω-1200Ω
SPP-3 ±600/°C 0.10Ω−0.91Ω
±600/°C 1.0Ω-2400Ω
SPP-2 ±600/°C 0.10Ω−0.91Ω
±300/°C 1.0Ω-2400Ω
±5%
±5%
±5%
±5%
±3%
95% minimum coverage
±5%
±5%
EIA Specification RS-344
20 40 60 80 100
0
100
200
300
SPP-3
SPP-2
SPP-1
0 50 100 150 200 250 300
0
20
40
60
80
100
SPP-1, 2
SPP-3
Ambient Temperature (°C) Percent Rated Power
Temperature Rise (°C)
Percent Rated Power
POWER DERATING: TEMPERATURE RISE:
HOW TO ORDER:
Sample Part No.: SPP 1 1K 5%
IRC Type
Power
(See specification chart for other power ratings)
Resistance Value
Expressed in ohms
(Standard EIA/MIL values)
Tolerance
±5%, ±10% standard
MAXIMUM LIMITS
0 20 40 60 80 100
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
