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45F120 Datasheet, PDF (1/1 Pages) Ohmite Mfg. Co. – Ohmicone® Silicone-Ceramic Conformal Axial Term. Wirewound, 1% and 5% Tol. Std.
40 Series
Ohmicone® Silicone-Ceramic Conformal
Axial Term. Wirewound, 1% and 5% Tol. Std.
1.5 in. / 38.1mm
L
D
Series Wattage Ohms
41
1.0 0.10-6K
42
2.0 0.10-8K
43
3.0 0.10-20K
45
5.0 0.10-70K
47
7.0 0.10-80K
40 10.0 0.10-150K
Dimensions (in./mm max.)
Length
Diam.
0.437 / 11.1 0.125 / 3.2
0.406 / 10.3 0.219 / 5.6
0.593 / 15.1 0.219 / 5.6
0.937 / 23.8 0.343 / 8.7
1.280 / 32.5 0.343 / 8.7
1.900 / 48.3 0.406 / 10.3
Lead
Voltage ga.
150 24
100 20
200 20
460 18
670 18
1000 18
Non-Inductive versions available. Insert “N” before tolerance code. Example: 42NJ27R
Ohmite 40 Series resistors are the most economical conformal
silicone-ceramic coated resistors offered. These all-welded units
are characterized by their low temperature coefficients and resis-
tance to thermal shock, making them ideal for a wide range of
electrical and electronic applications.
Units with 1% and 5% tolerances are identical in construction
and electrical specifications. Durable but economical 40 Series
resistors exceed industry requirements for quality.
F e at u r e s
S p e c i f i cat i o n s
• Economical
Material
• Applications include commercial, Coating: Conformal silicone-
industrial and communications
ceramic.
equipment
Core: Ceramic.
• Stability under high temperature
conditions
Terminals: Solder-coated copper
clad axial. RoHS solder com-
• All-welded construction
position is 96% Sn, 3.5% Ag,
• RoHS compliant; add “E” suffix
to part number to specify.
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).
Ordering info
Power rating: Based on
25°C free air rating (other
40 Series
Ohmicone®
Silicone Ceramic
Conformal Axial
Term. Wirewound
Non-Inductive
Winding
Optional (blank
= std. winding)
RoHS
Compliant
wattages available).
Overload: Under 5 watts:
5 times rated wattage for 5
seconds. 5 watts and over:
41NJR10E
10 times rated wattage for
5 seconds.
Wattage
1 = 1W
2
3
5
7
0 = 10W
Tolerance
F= 1%
J = 5%
Resistance Value
R10 = 0.10Ω
1R0 = 1.0Ω
10R = 10.0Ω
250 = 250Ω
1K0 = 1,000Ω
4K5 = 4,500Ω
50K = 50,000Ω
Temperature coefficient:
Under 1Ω: ±90 ppm/°C
1Ω to 9.99Ω: ±50 ppm/°C
10Ω and over: ±20
ppm/°C
Standard part numbers for 40 series
Wattage and Tolerance
1% Tolerance
5% Tolerance
Wattage and Tolerance
1% Tolerance
5% Tolerance
Wattage and Tolerance
1% Tolerance
5% Tolerance
Part No.
Prefix 
Suffix
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 –––7R5         
10 –––10R         
12 –––12R         
15 –––15R         
18 –––18R         
20 –––20R         
22 –––22R         
25 –––25R         
27 –––27R         
30 –––30R         
33 –––33R         
35 –––35R         
39 –––39R         
40 –––40R         
47 –––47R         
50 –––50R         
56 –––56R         
62 –––62R         
Part No.
Prefix 
Suffix
68 –––68R         
75 –––75R         
82 –––82R         
100 –––100         
120 –––120         
125 –––125         
150 –––150         
180 –––180         
200 –––200         
220 –––220         
225 –––225         
250 –––250         
270 –––270         
300 –––300         
330 –––330         
350 –––350         
390 –––390         
400 –––400         
450 –––450         
470 –––470         
500 –––500         
560 –––560         
600 –––600         
680 –––680         
750 –––750         
800 –––800         
820 –––820         
900 –––900         
1,000 –––1K0         
1,100 –––1K1         
1,200 –––1K2         
1,500 –––1K5         
1,800 –––1K8         
2,000 –––2K0         
Part No.
Prefix 
Suffix
2,200 –––2K2         
2,500 –––2K5         
2,700 –––2K7         
3,000 –––3K0         
3,300 –––3K3


3,500 –––3K5


3,900 –––3K9


4,000 –––4K0


4,500 –––4K5


4,700 –––4K7


5,000 –––5K0


6,000 –––6K0


6,800 –––6K8


7,000 –––7K0


7,500 –––7K5


8,000 –––8K0


9,000 –––9K0


10,000 –––10K


12,000 –––12K

13,000 –––13K

15,000 –––15K
17,000 –––17K
20,000 –––20K
22,000 –––22K
25,000 –––25K
30,000 –––30K
33,000 –––33K







Shaded values
involve very fine
resistance wire
and should not
be used in criti-
cal applications
without burn-in
and/or thermal
cycling.
35,000 –––35K

40,000 –––40K

50,000 –––50K

 = St andard values
 = Non-standard values subject to mini-
mum handling charge per item
Check product availability at www.ohmite.com
26 Ohmite Mfg. Co.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com