Ohmite’s Axiohm resistors are
Centohm coated for maximum
reliability. These all-welded
units are characterized by their
low temperature coefficients
and resistance to thermal
shock, making them ideal for
a wide range of electrical and
electronic applications.
F ꢀ A T ꢁ ꢂ ꢀ s
• Welded construction
Axiohm Series
• Inorganic and non-hygroscopic,
Centohm coating seals and pro-
tects the resistance wire.
• Exceeds MIL-R-26 moisture
requirements
• Centohm Resistors are designed
to meet and exceed performance
characteristics of vitreous enam-
el resistors.
Centohm Coated
Axial Terminal Wirewound
1.5 in. / 38.1mm
A
B
C
• Centohm is more cost effective
than vitreous enamel.
D
• ±5% resistance tolerance
ꢂeꢅiꢅtance
ꢂange
(Ω)
Dielectric
standard With- Maximum
ꢂeꢅiꢅtance ꢅtanding Voltage
C
D max.
clean term.
to clean
Watt
Wire
Gauge
(dia.)
O p T ꢃ O ꢄ s
Noninductive: This specially
designed version is wound using
the Ayrton-Perry method.
Resistance Tolerances: Options
include 5%, 1%, 0.5%, 0.25%,
and 0.1% resistors.
Terminal Sizes: Alternate terminal
diameters available.
Tape and Reel: Resistors taped
for automatic insertion. Contact
Ohmite for size, quantity and
ordering information
ꢂating
A
B
Form Min. Max. Tolerance Voltage ꢂating .ꢆ063”±±1.600
1C
2C
3C
4C
5C
7C
10C
.ꢆ6ꢇ3”617900
term. in.”00
0.1
4K
5ꢀ
5ꢀ
5ꢀ
5ꢀ
5ꢀ
5ꢀ
5ꢀ
500
500
500
500
500
500
500
100 0.313 .031 / 7.95 .79 0.094 / 2.39 #24 (.020”) 0.406 / 10.31
300
450
600
800
0.1 10K
0.1 20K
0.1 30K
0.1 40K
0.1 50K
0.1 90K
0.375
0.5
0.688
0.938
1
/
9.53
12.7
17.48
23.83
25.4
0.219 / 5.56 #20 (.032”) 0.469 / 11.91
0.219 / 5.56 #20 (.032”) 0.594 / 15.09
0.219 / 5.56 #20 (.032”) 0.813 / 20.65
0.219 / 5.56 #20 (.032”) 1.063 / 27.00
0.313 / 7.95 #20 (.032”) 1.125 / 28.58
0.313 / 7.95 #20 (.032”) 1.688 / 42.67
/
/
/
/
875
1600
1.563
/
39.7
Terminals: Tinned Copper weld.
RoHS solder composition is
96% Sn, 3.5% Ag, 0.5% Cu
Derating
Linearly from
100% @ +25°C to
0% @ +350°C.
Electrical
Tolerance: ±5% (Std) down to
0.1% available.
Power rating: Based on 25°C
free air rating (other wattages
available).
Overload: Under 5 watts: 5 times
rated wattage for 5 seconds. 5
watts and over: 10 times rated
wattage for 5 seconds.
Temperature coefficient:
0 ±30ppm /°C above 10Ω
0 ±100ppm/°C 1 to 10Ω
0 ±200ppm/°C below 1Ω
s p ꢀ C ꢃ F ꢃ C A T ꢃ O ꢄ s
Material
Coating: Flameproof proprietary
Centohm
Core: Ceramic
Element: Copper-nickel alloy or
nickel-chrome alloy depending
on resistance value
End Cap: Stainless steel
P e r f O r m a n c e d ata
O r d e r i n g i n f O r m at i O n
Test
Maximum
±30ppm/°C above 10Ω
±100ppm/°C 1 to 10Ω
±200ppm/°C below 1Ω
Non-Inductive
Temperature Coefficient
Option (Add N)
E = RoHS compliant
Example:
Std 3 watt,
10K ± 5% = 3CJ10K
Thermal Shock
Short Time Overload
Dielectric
± (2% + .05Ω)∆R
± (2% + .05Ω)∆R
± (0.1% + .05Ω)∆R
± (2% + .05Ω)∆R
± (2% + .05Ω)∆R
± (2% + .05Ω)∆R
± (2% + .05Ω)∆R
± (2% + .05Ω)∆R
± (3% + .05Ω)∆R
± (1% + .05Ω)∆R
� ꢀ ꢁ ꢂ ꢃ ꢄ ꢅ ꢆ
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock
Wattage
Tolerance
J = 5% (standard) use "K" for 1000
H = 3%
F = 1%
D = .5%
Q = .25%
B = .1%
Resistance (Ω)
Coating
"C" for
Centohm
multiplier; use "R"
for decimal point
Vibration
Load Life
Terminal Strength
∆R values are maximums based on MIL-R-26 testing requirements at 350°C.
Ohmite Mfg. Co.
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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