Axiohm ® Series

Axiohm
Centohm Coated
Axial Terminal Wirewound
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 at u r e s
Options
•Welded construction
•Inorganic and non-hygroscopic,
Centohm coating seals and protects
the resistance wire.
•Exceeds MIL-R-26 moisture requirements
•Centohm Resistors are designed to
meet and exceed performance characteristics of vitreous enamel resistors.
•Centohm is more cost effective than
vitreous enamel.
•±5% resistance tolerance
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
S e r i e s s p e c i f i c at i o n s
Watt
Rating
Form
1C
2C
3C
4C
5C
7C
10C
Resistance
Range (Ω)
Min. Max.
0.1
4K
0.1 10K
0.1 20K
0.1 30K
0.1 40K
0.1 50K
0.1 90K
Standard
Resistance
Tolerance
±5%
±5%
±5%
±5%
±5%
±5%
±5%
Dielectric
Withstanding
Voltage
500
500
500
500
500
500
500
Maximum
Voltage
Rating
100
300
450
600
800
875
1600
Characteristics
Coating Flameproof proprietary Centohm
Core Ceramic
Element Copper-nickel alloy or nickel-chrome alloy depending on
resistance value
End Cap Stainless steel
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.
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 ±30ppm /°C above 10Ω
±100ppm/°C 1 to 10Ω
±200ppm/°C below 1Ω
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
91
Axiohm
Centohm Coated
Axial Terminal Wirewound
Dimensions
(in./mm)
1.5 in. / 38.1mm
A
B
C
D
Watt
Rating
A
B
Form
±.063”/±1.60mm
±.031”/0.79mm
C
Wire Gauge
(dia.)
D max.
clean term. to clean
term. in./mm
1C
0.094 / 2.39
#24 (.020”)
0.406 / 10.31
0.5 / 12.7
0.219 / 5.56
#20 (.032”)
0.594 / 15.09
0.938 / 23.83
0.219 / 5.56
#20 (.032”)
1.063 / 27.00
2C
3C
0.313±.031 / 7.95±.79
0.375 / 9.53 4C
0.688 / 17.48
7C
1 / 25.4
5C
10C
0.219 / 5.56
#20 (.032”)
0.219 / 5.56
#20 (.032”)
0.313 / 7.95 1.563 / 39.7
#20 (.032”)
0.313 / 7.95
#20 (.032”)
0.469 / 11.91
0.813 / 20.65
1.125 / 28.58
1.688 / 42.67
P e r fo r m a n c e da t a
Test Maximum
Temperature Coefficient ±30ppm/°C above 10Ω
±100ppm/°C 1 to 10Ω
±200ppm/°C below 1Ω
Thermal Shock ± (2% + .05Ω)∆R
Short Time Overload ± (2% + .05Ω)∆R
Dielectric ± (0.1% + .05Ω)∆R
Low Temperature Storage ± (2% + .05Ω)∆R
High Temperature Exposure ± (2% + .05Ω)∆R
Moisture Resistance ± (2% + .05Ω)∆R
Shock ± (2% + .05Ω)∆R
Vibration ± (2% + .05Ω)∆R
Load Life ± (3% + .05Ω)∆R
Terminal Strength ± (1% + .05Ω)∆R
O R D ERIN G IN F O RM A TI O N
Non-Inductive
Option (Add N)
E = RoHS compliant
Example:
Std 3 watt,
10K ± 5% = 3CJ10K
Wattage
92
Coating
"C" for
Centohm
Tolerance
J = 5% (standard)
H = 3%
F = 1%
D = .5%
Q = .25%
B = .1%
Resistance (Ω)
use "K" for 1000
multiplier; use "R"
for decimal point
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
∆R values are maximums based on
MIL-R-26 testing requirements at
350°C.