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 E A T U R E S
• Welded construction
Axiohm Series
Axial Lead Wirewound Resistors
• Inorganic and non-hygroscopic,
Centohm coating seals and pro-
tects the resistance wire.
• Centohm coating is flameproof
and withstands temperatures in
excess of 2000°F.
Centohm Coated
1.5 / 38.1
A
B
C
• Exceeds MIL-R-26 moisture
requirements
• Centohm Resistors are designed
to meet and exceed performance
characteristics of vitreous enam-
el resistors.
• Centohm is more cost effective
than vitreous enamel.
D
Resistance
D
Watt
Range
Standard
Dielectric Maximum
C
B&S
max clean
lead to
Rating
(Ω)
Resistance Withstanding Voltage
A
B
• ±5% resistance tolerance
Form Min. Max. Tolerance
Voltage
500
500
500
500
500
500
500
(dia.) clean lead
1C
2C
3C
4C
5C
0.1
4K
±5%
±5%
±5%
±5%
±5%
±5%
±5%
100
300
450
600
800
875
1600
5/16±1/32
3/32 #24 (.020”)
7/32 #20 (.032”)
7/32 #20 (.032”)
7/32 #20 (.032”)
7/32 #20 (.032”)
5/16 #20 (.032”)
5/16 #20 (.032”)
13/32
15/32
19/32
13/16
11/16
11/8
O P T I O N S
0.1 10K
0.1 20K
0.1 30K
0.1 40K
0.1 50K
0.1 90K
3/8
1/2
Noninductive Resistors: These
specially designed versions are
wound using the Ayrton-Perry
method.
11/16
15/16
1
Controlled or Limited
7C
10C
Inductance Resistors: Using
special single windings, these
versions limit the inductance to a
specified value.
19/16
111/16
Leads: Tinned Copperweld
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:
S P E C I F I C A T I O N S
Resistance Tolerances: Options
include 5%, 1%, 0.5%, 0.25%,
and 0.1% resistors.
Lead Sizes: Alternate lead diam-
eters available.
Tape and Reel: Resistors taped
for automatic insertion. Call the
factory for size, quantity and
ordering information
Material
Coating: Flameproof proprietary
Centohm
Core: Ceramic
Element: Copper-nickel alloy or
nickel-chrome alloy depending
on resistance value
End Cap: Stainless steel
E N V I R O N M E N TA L P E R F O R M A N C E
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
Temperature Coefficient
Non-Inductive
Option (Add N)
E = RoHS compliant
Available Jan. 2006
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
Example:
Std 3 watt,
� ꢀ ꢁ ꢂ ꢃ ꢄ ꢅ ꢆ
10K ± 5% = 3CJ10K
Low Temperature Storage
High Temperature Exposure
Moisture Resistance
Shock
Wattage
Tolerance
Resistance (Ω)
J = 5% (standard) use "K" for 1000
Coating
"C" for
H = 3%
F = 1%
multiplier; use "R"
for decimal point
Standard
Centohm
Vibration
D = .5%
Q = .25%
B = .1%
Load Life
Terminal Strength
∆R values are maximums based on MIL-R-26 testing requirements at 350°C.
Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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