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WIREWOUND AND FILM TECHNOLOGIES

SPF Datasheet Preview

SPF Datasheet

GENERAL-PURPOSE FAILSAFE MOLDED WIREWOUND RESISTOR

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GENERAL-PURPOSE FAILSAFE
MOLDED WIREWOUND RESISTOR
ISO-9001
Registered
SPH/SPF SERIES
3
1
Drop-in replacement for BWH/BWF
2 watt rated with 1 watt dimensions
±5%, ±10% tolerance
0.1 ohm to 2400 ohms
TCR's as low as ±150 ppm/°C std (custom TC's available)
Weldable and solderable leads
2
See notes below
4
SPECIFICATIONS:
IRC Type
EIA RS-344 Style
MIL-R-11 Style
Resistance - Std.
Tolerance - Std.
Power Rating
SPH
CRU 2
RC32/RC42
0.1to 2400
±5%, ±10%
2 watt @ 70°C
1 watt @ 115°C
Derating to 0 @ 160°C
Max. Continuous Working
Voltage
Min. Insulation
Dry
Resistance
Wet
Min. Dielectric
ATM
Withstanding Volts
(RMS) Reduced Pressure
Hotspot Temperature Rise
Typical Load Life
Current Noise
PR
10,000 Meg
100 Meg
1000 V
625V
145°C @ 2 watts
5%
Negligible
SPF
CRU 2
RC32/RC42
0.1to 1000
±5%, ±10%
2 watt @ 70°C
1 watt @ 115°C
Derating to 0 @ 160°C
PR
10,000 Meg
100 Meg
1000 V
625V
145°C @ 2 watts
5%
Negligible
1. Resistive Element
All resistor types have resistance alloy wind-
ing on a braided fiberglass substrate. Inter-
mediate silicone coatings are used to en-
hance processibility and to provide
protection to the resistive element.
2. Termination
The SPH and SPF resistors are terminated
using an alloy coated copper flashed steel
lead welded to a cap of the same material.
This termination assembly is mechanically
crimped, utilizing an improved crimp design,
to the resistive element.
3. Encapsulation
The SPH and SPF are encapsulated utiliz-
ing a compression molded phenolic plastic
material. The SPF has a flame-resistance
coating applied over the resistive element
to provide flammability protection when
destructive overloads may occur.
4. Marking
All products are marked utilizing heat and
solvent resistant color code bands consis-
tent with EIA/MIL requirements. The first
band is double width to designate
wirewound construction. A fifth band, blue
in color, is used for flameproof identifica-
tion.
DIMENSIONS (Inches and (mm)):
D
A
BC
IRC TYPE
A
B
C
D
SPH
0.562±0.010 0.225±0.008 0.032±0.002 1.50±0.126
(14.3±0.25) (5.72±0.20) (0.813±0.05) (38.1±3.2)
SPF
0.562±0.010 0.225±0.008 0.032±0.002 1.50±0.126
(14.3±0.25) (5.72±0.20) (0.813±0.05) (38.1±3.2)
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
1




WIREWOUND AND FILM TECHNOLOGIES

SPF Datasheet Preview

SPF Datasheet

GENERAL-PURPOSE FAILSAFE MOLDED WIREWOUND RESISTOR

No Preview Available !

ISO-9001
Registered
SPH/SPF CHARACTERISTICS (TYPICAL PERFORMANCE):
Test
Temperature Coefficient (ppm)*
SPH
0.1- 0.16±1000
0.18- 0.68±800
0.75- 2400±400
Dielectric Withstanding Voltage (RMS)
Momentary Overload
Low Temperature Operation
Temperature Cycle
Humidity
Load Life
Terminal Strength
Resistance to Solder Heat
Solderability
*All ppm levels listed are maximum.
1000V
5%
5%
5%
5%
5%
5%
5%
No Failures
SPH POWER DERATING:
2.5
SPF POWER DERATING:
2.5
2.0 2.0
1.5 1.5
1.0 1.0
0.5
00
50 70 100
150 160 200
Ambient Temperature (°C)
0.5
00
50 70 100
150
200
Ambient Temperature (°C)
SPF
0.10±1700
0.11- 0.16±1000
0.18- 0.68±800
0.75- 1000±400
1000V
5%
5%
5%
5%
5%
5%
5%
No Failures
SPF TYPICAL FUSING:
25
20
0.1 ohm
15 1 ohm
10 ohm
10 100 ohm
1000 ohm
5
2
0
0 20 40 60 80 100
Time (seconds)
SPH AND SPF
TEMPERATURE RISE:
150
125
100
75
50
25
0
0 0.5 1.0 1.5
Power Input (watts)
2.0
HOW TO ORDER:
Sample Part No.:
SPH 1505%
IRC Type
Resistance Range
Tolerance
2 WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com


Part Number SPF
Description GENERAL-PURPOSE FAILSAFE MOLDED WIREWOUND RESISTOR
Maker WIREWOUND AND FILM TECHNOLOGIES
Total Page 2 Pages
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