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26 Ohmite Mfg. Co.
Standard part numberS for 40 SerieS
40 Series
Ohmicone® Silicone-Ceramic Conformal
Axial Term. Wirewound, 1% and 5% Tol. Std.
FEATURES
• Economical
• Applications include commercial,
industrial and communications
equipment
• Stability under high temperature
conditions
• All-welded construction
• RoHS compliant; add “E” suffix
to part number to specify.
SPECIFICATIONS
Material
Coating: Conformal silicone-
ceramic.
Core: Ceramic.
Terminals: Solder-coated copper
clad axial. RoHS solder com-
position is 96% Sn, 3.5% Ag,
0.5% Cu
Derating
Linearly from
100% @ +25°C to
0% @ +275°C.
Electrical
Tolerance: ±5% (J type), ±1%
(F type) (other tolerances avail-
able).
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:
Under 1Ω: ±90 ppm/°C
1Ω to 9.99Ω: ±50 ppm/°C
10Ω and over: ±20
ppm/°C
Dimensions (in./mm max.) Lead
Series Wattage Ohms Length Diam. Voltage ga.
41 1.0 0.10-6K 0.437 / 11.1 0.125 / 3.2 150 24
42 2.0 0.10-8K 0.406 / 10.3 0.219 / 5.6 100 20
43 3.0 0.10-20K 0.593 / 15.1 0.219 / 5.6 200 20
45 5.0 0.10-70K 0.937 / 23.8 0.343 / 8.7 460 18
47 7.0 0.10-80K 1.280 / 32.5 0.343 / 8.7 670 18
40 10.0 0.10-150K 1.900 / 48.3 0.406 / 10.3 1000 18
Non-Inductive versions available. Insert “N” before tolerance code. Example: 42NJ27R
0.1 –––R10
0.15 –––R15
0.2 –––R20
0.25 –––R25
0.3 –––R30
0.33 –––R33
0.4 –––R40
0.5 –––R50
0.75 –––R75
1 –––1R0
1.5 –––1R5
2 –––2R0
2.2 –––2R2
3 –––3R0
4 –––4R0
5 –––5R0
7.5
