Page 34
Carbon Composition Resistors
SEI
Type RC
•
•
•
•
•
Non-Inductive Design
Meets Performance Standards of EIA RS-172
Hot Molded Process for Product Uniformity
Ideal for Pulse-Load Handling
Brown Body Color
PERFORMANCE CHARACTERISTICS (TESTED PER MIL-STD-202)
ELECTRICAL
Power Rating (Watts)
Derated to 0 Load at
Rated Continuous Working Voltage (RCWV)
Dielectric Withstand Voltage
Resistance Range
Tolerance
Maximum Pulse Voltage
Insulation Resistance
RC 1/4
1/4 @70°C
130°C
√PR
or 250V
whichever is less
500V (325V @ 3.4"Hg)
2.2Ω – 5.6 meg
±5%
and
±10%
400 volts RMS
10,000 meg min.
±5%
typ. (1% to 7% max.)
±1%
typ. (±2% max.)
-3% typ. (2% to -5% max.)
±1%
max.
±2%
max.
-0.5% to +2% typ. (±3% max.)
±1%
max.
±0.5%
typ. (±2% max.)
-.005%/V to -.032%/V
±0.5%
typ. (±2% max.)
RC 1/2
1/2 @70°C
130°C
√PR
or 350V
whichever is less
700V (450V @ 3.4"Hg)
1.0Ω – 20 meg
1
±5%
and
±10%
700 volts RMS
10,000 meg min.
±4%
typ. (1% to 6% max.)
±1%
typ. (±2% max.)
-3% typ. (2% to -5% max.)
±1%
max.
±2%
max.
-0.5% to +2% typ. (±3% max.)
±1%
max.
±0.5%
typ. (±2% max.)
-.005%/V to -.032%/V
±0.5%
typ. (±2% max.)
ENVIRONMENTAL
Moisture Resistance
Thermal Shock
Load Life @ 70°C — 1,000 hrs
Vibration (High-Frequency)
Shock (Specified Pulse)
Resistance to Soldering Heat
Terminal Strength
Low-Temperature Operation
Voltage Coefficient (1K - 20 meg)
Short Time Overload
RESISTANCE TEMPERATURE CHARACTERISTICS
Resistance Range
Maximum % resistance change
from room temperature (+25°C)
value.
under 1K
1K to 9.1K
10K to 91K
100K to 910K
1 meg to 10 meg
-55°C
+2.0 to +5.0
+5.0 to +9.0
+8.0 to +11.0
+10.0 to +14.0
+13.0 to +20.0
+105°C
-4.0 to -2.0
-5.0 to -3.0
-7.0 to -5.0
-9.0 to -7.0
-14.0 to -9.0
DIMENSIONS:
FEATURE
A – Lead Length (typ.)
B – Body Length
C – Lead Diameter
D – Body Diameter
2
Inches (mm)
RC 1/2
1.024
±.032
(26.0
±0.80)
.374 +.032/-.028 (9.50 +0.80/-0.70)
.027
±.002
(0.7
±0.05)
.142
±.008
(3.60
±0.20)
RC 1/4
1.102
.248
.024
.094
±.032
(28.0
±0.80)
±.028
(6.30
±0.70)
±.002
(0.60
±0.05)
±.004
(2.40
±0.10)
ORDERING INFORMATION
RC
1/4
1K
5%
NOTES
1. Special 1Ω
±5%
resistor available in 1/2W only. Contact factory.
2. Dimensions are for bulk packaged product only.
Type
Wattage
Resistance
Tolerance
SEI Electronics Inc.
•
P.O. Box 58789
•
Raleigh, NC 27658-8789
•
Telephone: (919) 850-9500
•
FAX: (919) 850-9504
Toll Free: (888) SEI-SEI-SEI
•
www.seielect.com
•
email: marketing@seielect.com
•
ISO 9002 / QS 9000 Registered
Rev. 12/00
Page 35
Carbon Composition Resistors
SEI
Type RC
PERFORMANCE CURVES
Surge Resistance Characteristics (RC 1/4)
Surge Resistance Characteristics (RC 1/2)
Load Ratio vs. Temperature
Load Life (Rated Load)
Variation With Time
Frequency Characteristics
RELIABILITY TEST – Load Life in Moisture
Criterion
(%)
Load Ratio
P/Pn (%)
0
20
60
100
Total
Total
Total Testing
Number of
Time (Hrs) Fractures(pcs)
2.984 x 10
6
2.990 x 10
6
2.997 x 10
6
2.992 x 10
6
1.196 x 10
7
1.20 x 10
7
6
4
2
3
15
0
Failure Ratio
Average Lifetime
λ
λCL
(60%) (60% reliability level) (Hrs)
0.201
0.134
0.067
0.100
0.125
0.0055
0.244
0.176
0.104
0.139
0.138
0.0077
4.098 x
5.682 x
9.615 x
7.194 x
7.209 x
1.299 x
10
5
10
5
10
5
10
5
10
5
10
7
∆R/R
±5
±10
SEI Electronics Inc.
•
P.O. Box 58789
•
Raleigh, NC 27658-8789
•
Telephone: (919) 850-9500
•
FAX: (919) 850-9504
Toll Free: (888) SEI-SEI-SEI
•
www.seielect.com
•
email: marketing@seielect.com
•
ISO 9002 / QS 9000 Registered
Rev. 12/00
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