P Series
1" /
25.4mm
min.
Epoxy Molded Precision
Wirewound Axial Terminals
L
D Terminal AWG
Series
PE
PF
PA
PG
PB
PC
PD
Wattage
0.125
0.250
0.500
0.750
0.900
1.500
2.000
Diam. (in./mm)
0.125 /
3.18
0.187 /
4.75
0.250 /
6.35
0.250 /
6.35
0.375 /
9.53
0.375 /
9.53
0.500 /
12.7
Length (in./mm)
0.250 /
6.35
0.375 /
9.53
0.500 /
12.7
0.750 /
19.1
1.000 /
25.4
1.000 /
25.4
1.500 /
38.1
Lead ga.
22
22
22
20
20
20
20
Ohmite’s P Series Epoxy
molded Precision Wirewound
Resistors are designed to
meet the exacting require-
ments of Military Specification
MIL-R-93. The P Series offers
high stability and low Tempera-
ture Coefficient of Resistance
(TCR). These resistors offer
tolerances as accurate as
±0.005% and Temperature Co-
efficients of Resistance (TCR)
as low as ±2PPM/°C in a wide
range of resistance values.
SPECIFICATIONS
Material
Terminals:
Tinned Copper
Encapsulation:
Silicone Molding
Compound
Electrical
Resistance range:
1Ω to 15MΩ
Standard Tolerances:
0.005%,
0.01%, 0.02%, 0.05%, 0.1%,
0.25%, 0.5%, and 1%
Temperature Coefficient of
Resistance, 0°C to 85°C:
1Ω to <10Ω: ±25 PPM/°C
10
Ω
to <100Ω: ± 15 PPM/°C
≥100Ω:
±10 PPM/°C
Operating Temperature Range:
-65°C to 145°C
Temperature Compensating
TCR:
from +80 through +6000
PPM
TCR Matching:
to ±0.5 PPM/°C
at 25°C
FEATURES
• Wide Range of Precise
Tolerances (±0.005% to ±1%).
• Low Inductance.
• RoHS Compliant.
• Axial configuration convenient
for PCB and hard wiring applica-
tions.
O R D E R I N G I N F O R M AT I O N
E = RoHS compliant
DERATING
P Series Resistors
must be derated for
tolerances below
0.1% and for elevated
ambient tempera-
tures. Choose the
curve corresponding
to the desired toler-
ance. Determine the
maximum allowed
percentage of rated
power from the graph
based on the maximum
ambient temperature
expected during use.
100
80
0.05%
60
40
0.02%
0.01%
1.0%, 0.5%, 0.25% & 0.1%
P Series
Wattage
E = 0.125W
F = 0.25W
A = 0.5W
G = 0.75W
B = 0.9W
C = 1.5W
D = 2.0W
Tolerance
Z = 0.005%
T = 0.010%
Q = 0.020%
A = 0.050%
B = 0.100%
C = 0.250%
D = 0.500%
F = 1.000%
Resistance
1R000 =
1Ω
10R00 = 10Ω
100R0 = 100Ω
1000R = 1000Ω
10K00 = 10KΩ
100K0 = 100KΩ
1M000 = 1MΩ
Percent Rated Power
PAF1000RE
20
0.005%
0
0
20
Check product availability at
www.ohmite.com
65
85 105 115 125
145
40
60
100 120 140 160
80
Ambient Temperature,
°C
40
Ohmite Mfg. Co.
1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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