w-Cost General Purpose
Fibre Core Conformal
Coated Wirewound
nformal Coated
Resistor
ewound Resistor
SPP Series
Low-Cost General Purpose
·
UL1412 recognised fusing *
es
·
Coated or uncoated units
uncoated
Conformal Coated
units
·
Positive high TC’s upon request
gh TC’s upon request
·
Color band standard identification
Wirewound Resistor
d standard
·
identification
Lower ranges available - contact factory
SPP
contact
and solderable magnetic leads
ges available
Weldable
factory
-
Series
·
Coated or uncoated units
* UL file number E234469
Color band standard identification
Lower ranges available - contact factory
Weldable and solderable magnetic leads
Alloy resistance
wirewound on
fiberglass core
Mechanically crimped
termination assembly
Alloy resistance
wirewound on
fiberglass core
Mechanically crimped
termination assembly
and solderable magnetic
upon request
leads
Positive high TC’s
EIA/MIL color code:
first wide band indicates
wirewound construction,
blue indicator indicates
flameproof
ical Data
EIA/MIL color code:
first wide band indicates
wirewound construction,
blue indicator indicates
flameproof
Electrical Data
IRC Type
SPP-1
SPP-1
SPP-2
SPP-2
SPP-3
SPP-3
ce - Std.
Resistance - Std.
0.1Ω to 1200
Ω
1
0.1Ω to 1200
Ω
0.1Ω to 2400Ω
0.1Ω to 2400Ω
1
1
to
to 470
470
0.1Ω to 2400Ω
---
0.1Ω to 2400Ω
---
UL Recognised Range
gnised Range
Tolerance - Std.
1
to 470
to 470
e - Std.
Power Rating
ating
Load Life Stability
Max. Continuous
Working Voltage
Min. Insulation
1 watt @ 85°C
3/4 watt @ 105°C
1 watt @ 85°C
125°C
1/2 watt @
3/4 watt @ 105°C
160°C
Derating to 0 @
±5% (E24), ±10% (E12)
±5% (E24), ±10% (E12)
2 watt @ 85°C
1 watt @ 140°C
2 watt @ 85°C
---
1 watt @ 140°C
---
3 watt @ 85°C
2 watt @ 145°C
3 watt @ 85°C
1 watt @ 190°C
---
2 watt @ 145°C
3 watt @ 85°C ± 10%
1/2 watt @ 125°C
± 10%
1 watt @ 85°C
Derating to 0 @ 160°C
1 watt @ 85°C ± 10%
Dry
Wet
(RMS)
2 watt @ 85°C ± 10%
---
---
1 watt @ 190°C
---
e Stability
√
PR
ntinuous
Resistance
Min. Dielectric
Withstanding Volts
Current Noise
Temperature Rise at
Voltage
√
PR
10,000 Meg
100 Meg
600V
2 watt @ 85°C ± 10%
10,000 Meg
100 Meg
600V
√
PR
√
PR
√
PR
10,000 Meg
100 Meg
600V
Negligible
3 watt @ 85°C ± 10%
√
PR
10,000 Meg
100 Meg
600V
lation
Dry
ce
Wet
10,000 Meg
Negligible
100 Meg
Approx. 150°C
±600/°C
0.10Ω - 0.91Ω
10,000 Meg
Negligible
100 Meg
Approx. 200°C
±600/°C
0.10Ω - 0.91Ω
ectric
Rated Load, 25°C Ambient
Temperature Coefficient
Approx. 225°C
±600/°C
0.10Ω - 0.91Ω
±300/°C
1Ω - 2400Ω
ding Volts
(RMS)
600V
±300/°C
1Ω - 1200Ω
600V
±300/°C
1Ω - 2400Ω
Noise
Notes:
Unless specified otherwise, standard test centers are 1 ¾ inches.
Negligible
Negligible
Approx. 200°C
±600/°C
0.10Ω - 0.91Ω
±300/°C
1Ω - 2400Ω
Negligible
Approx. 225°C
±600/°C
0.10Ω - 0.91Ω
ture Rise at
ad, 25°C Ambient
Approx. 150°C
±600/°C
0.10Ω - 0.91Ω
±300/°C
1Ω - 1200Ω
ture Coefficient
General Note
±300/°C
1Ω - 2400
otherwise, standard
Note
centers are 1 ¾ inches.
General
test
Wire and Film Technologies Division
Telephone:
Facsimile:
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own
without notice
considered accurate at time of going to print.
IRC reserves the right to make changes in product specification
data and is
or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
A subsidiary of
TT electronics plc
r
© TT electronics plc
Website: www.irctt.com
rpus Christi Te
10.12
Fibre Core Conformal Coated
Wirewound Resistor
Low-Cost General Purpose
Conformal Coated
SPP Series
Wirewound Resistor
Characteristics
SPP-1
Temperature Coefficient (ppm/°C)
SPP-2
SPP-3
Thermal Shock
Low Shock
Short Time Overload
Commercial Short Time Overload
Resistance to Solder Immersion
Solderability
Moisture Resistance
Life Test
Test Method
Maximum Limits
±600/°C
±300/°C
±600/°C
±300/°C
±600/°C
±600/°C
0.10Ω - 0.91Ω
1.0Ω - 1200Ω
0.10Ω - 0.91Ω
1.0Ω - 2400Ω
0.10Ω - 0.91Ω
1.0Ω - 2400Ω
±5%
±5%
±5%
±5%
±3%
95% minimum coverage
±5%
±5%
EIA Specification RS-344
Environmental Data
Physical Data
A
max.
C
B
1.125
(28.6)
min.
Dimensions (Inches and (mm))
IRC Type
SPP-1
SPP-2
SPP-3
Wire and Film Technologies Division
T
:
F
:
A
0.400(10.2) max.
0.570(14.5) max.
0.570(14.5) max
T
B
0.148(3.8) max.
0.170(4.3) max.
0.170(4.3) max.
C ± .002(0.05)
0.032(0.8)
0.032(0.8)
0.032(0.8)
W
:
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
10.12
Low-Cost General Purpose
Fibre Core Conformal Coated
Conformal Coated
Wirewound Resistor
Wirewound Resistor
SPP Series
Power Derating Curve
100
Temperature Rise Curve
300
Percent Rated Power
60
40
20
0
0
50
100
SPP-3
Temperature Rise (°C)
80
SPP-3
200
SPP-1, 2
SPP-2
100
150
200
250
300
SPP-1
0
Fusing Time (s)
Low-Cost General Purpose
Conformal Coated
Ordering Data
Wirewound Resistor
Ambient Temperature (°C)
0
SPP1 Fusing Characteristic
(Maximum & Typical Fusing Times)
20
40
60
80
100
Percent Rated Power
SPP Series Pulse Energy Limit
single or low repetition rate, ΔR <5%)
100
7
6
5
4
3
2
Maximum
IRC Type
Power
1
Typical
100
10
(See Electrical
15
Data chart for
25
other power ratings)
40
20
30
35
Percent Rated Power
Initial Power (W)
Energy (J)
Power Derating Curve
10
45
50
Sample Part No.
Temperature Rise Curve
60
1
LF
55
Temperature Rise (°C)
Note:
Recognition
After fusing the ohmic value is at least 100 times the initial value, provided
initial
recognised (optional
UL = UL1412
power ≥ 25W is applied.
characters)
80
300
0
SPP1
1
10
100
SPP2
10000
Resistance Value
60
SPP2 Fusing Characteristic
(Maximum & Typical Fusing Times)
SPP-3
Value (ohms)
SPP-3
1000
Expressed in ohms
SPP-1,
(Standard EIA/MIL values)
1000
40
2
200
7
6
1.2/50us Peak Voltage Limit
(10 pulses at 30s intervals, ΔR <5%)
SPP-2
J = ±5%, K = ±10% standard
100
20
Fusing Time (s)
Tolerance
SPP2
LF
= Lead Free
0
10
Voltage kV
100
4
3
2
1
5
0
50
100
150
200
250
300
Maximum
SPP-1
0
1
SPP1
Ambient Temperature (°C)
1
10
15
20
25
30
35
40
45
50
55
Initial Power (W)
Typical
60
0
0
20
10
40
100
60
1000
80
100
10000
Note: After fusing the ohmic value is at least 100 times the initial value, provided
initial power ≥ 40W is applied.
Percent Rated Power
Value (ohms)
Ordering Data
Sample Part No.
IRC Type
Power
LF
(See Electrical Data chart for other power ratings)
Recognition
T
:
UL = UL1412 recognised (optional characters)
Wire and Film Technologies Division
F
:
Resistance Value
W
:
T
Expressed in ohms
(Standard EIA/MIL values)
J = ±5%, K = ±10% standard
Tolerance
LF
= Lead Free
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
10.12
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