22
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
Ohmite Mfg. Co.
STOCK PART NUMBERS FOR STANDARD RESISTANCE VALUES
40 Series
Ohmicone
®
‚ Silicone-Ceramic Conformal
Axial Lead Wirewound Resistors
1% and 5% Tolerances Standard
Ohmite 40 Series resistors are
the most economical confor-
mal silicone-ceramic coated
resistors offered. These all-
welded units are characterized
by their low temperature coef-
ficients and resistance to ther-
mal 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.
FEATURES
•
Economical
•
Applications include commercial,
industrial and communications
equipment
•
Stability under high temperature
conditions
•
All-welded construction
•
CECC sizes available
•
RoHS compliant product avail-
able Jan. 2006 Add “E” suffix to
part number to specify.
SPECIFICATIONS
Material
Coating:
Conformal silicone-
ceramic.
Core:
Ceramic.
Terminals:
Solder-coated copper
clad axial lead.
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 1
Ω
: ±90 ppm/°C
1
Ω
to 9.99
Ω
: ±50 ppm/°C
10
Ω
and over: ±20 ppm/°C
Dimensions (in. /
mm
)
Lead
Series
Wattage
Ohms
Length
Diam.
Voltage
ga.
41
1.0
1.0
0.10-6K
0.10-6K
0.437 /
0.437 /
11.1
0.125 /
0.125 /
3.2
3.2
3.2 3.2
150
150
24
42
2.0
0.10-8K
0.406 /
10.3
0.219 /
5.6
5.6 5.6
100
20
43
43
3.0
3.0
0.10-20K
0.10-20K
0.593 /
0.593 /
15.1
15.1
0.218 /
0.218 /
5.5
5.5
5.5 5.5
200
200
20
20
45
5.0
0.10-70K
0.937 /
23.8
0.343 /
8.7
8.7 8.7
460
18
47
7.0
7.0
0.10-80K
0.10-80K
1.280 /
1.280 /
32.5
32.5
0.343 /
0.343 /
8.7
8.7
8.7 8.7
670
670
18
18
40
10.0
0.10-150K
1.642 /
41.7
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
–––
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
=
Most popular stock values
=
Stock values
=
Non-stock values subject to mini-
mum handling charge per item
Non-stock values subject to mini-
mum handling charge per item
Non-stock values subject to mini-
Shaded values
involve very fine
resistance wire
involve very fine
resistance wire
involve very fine
and should not
be used in criti-
cal applications
without burn-in
cal applications
without burn-in
cal applications
and/or thermal
cycling.
L D
1.5 /
38.1
Ohmic value
41F
–––
1
43F
–––
3
45F
–––
5
40F
–––
10
41J
–––
1
42J
–––
2
43J
–––
3
45J
–––
5
40J
–––
10
1% Tolerance
5% Tolerance
Wattage and Tolerance
Part No.
Prefix
Suffix
Ohmic value
41F
–––
1
43F
–––
3
45F
–––
5
40F
–––
10
41J
–––
1
42J
–––
2
43J
–––
3
45J
–––
5
40J
–––
10
1% Tolerance
5% Tolerance
Wattage and Tolerance
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
Shaded values
Shaded values
17,000
–––
17K
involve very fine
involve very fine
20,000
–––
20K
and should not
and should not
22,000
–––
22K
be used in criti-
be used in criti-
25,000
–––
25K
without burn-in
without burn-in
cal applications
without burn-in
cal applications
cal applications
without burn-in
cal applications
30,000
–––
30K
and/or thermal
and/or thermal
33,000
–––
33K
cycling.
cycling.
35,000
–––
35K
40,000
–––
40K
50,000
–––
50K
=
=
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
Ohmic value
41F
–––
1
43F
–––
3
45F
–––
5
40F
–––
10
41J
–––
1
42J
–––
2
43J
–––
3
45J
–––
5
40J
–––
10
1% Tolerance
5% Tolerance
Wattage and Tolerance
Part No.
Prefix
Suffix
