Ohmicone Silicone-Ceramic Conformal
Axial Terminal Wirewound
1% and 5% Tolerance Standard
®
40 Series
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 resistance to thermal
shock, making them ideal for a wide range of electri-
cal 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
• 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.
S e r i e S S P e C i F i C at i O N S
Series
41
42
43
45
47
40
Non-Inductive versions available. Insert “N” before tolerance code.
Example: 42NJ27R
Wattage
1.0
2.0
3.0
5.0
7.0
10.0
Ohms
0.10-6K
0.10-8K
0.10-20K
0.10-70K
0.10-80K
0.10-150K
Voltage
150
100
200
460
670
1000
CharaCteriStiCS
Coating
Conformal silicone-ceramic.
Core
Ceramic.
Terminals
Solder-coated copper clad axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
Derating
Linearly from 100% @ +25°C to 0% @ +275°C.
Tolerance
±5% (J type), ±1% (F type) (other tolerances available).
Power rating
Based on 25°C free air rating
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.)
Series
Wattage
1.0
2.0
3.0
5.0
7.0
10.0
Length
0.437 /
11.1
0.406 /
10.3
0.593 /
15.1
0.937 /
23.8
1.280 /
32.5
1.900 /
48.3
Diam.
0.125 /
3.2
0.219 /
5.6
0.219 /
5.6
0.343 /
8.7
0.343 /
8.7
0.406 /
10.3
Lead ga.
24
20
20
18
18
18
1.5 in. /
38.1mm
L
D
41
42
43
45
47
40
(continued)
84
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Ohmicone Silicone-Ceramic Conformal
Axial Terminal Wirewound
1% and 5% Tolerance Standard
®
40 Series
O r D e r i N G i N F O r m at i O N
Standard part numbers
Wattage and Tolerance
1% Tolerance
5% Tolerance
Ohmic value
Ohmic value
40J–––
10
40F–––
10
41F–––
1
43F–––
3
45F–––
5
41J–––
1
42J–––
2
43J–––
3
Part No.
Prefix
Suffix
–––R10
–––R15
–––R20
–––R25
–––R30
–––R33
–––R40
–––R50
–––R75
–––1R0
–––1R5
–––2R0
–––2R2
–––3R0
–––4R0
–––5R0
–––7R5
–––10R
–––12R
–––15R
–––18R
–––20R
–––22R
–––25R
–––27R
–––30R
–––33R
–––35R
–––39R
–––40R
–––47R
–––50R
–––56R
–––62R
45J–––
5
Part No.
Prefix
Suffix
–––68R
–––75R
–––82R
–––100
–––120
–––125
–––150
–––180
–––200
–––220
–––225
–––250
–––270
–––300
–––330
–––350
–––390
–––400
–––450
–––470
–––500
–––560
–––600
–––680
–––750
–––800
–––820
–––900
–––1K0
–––1K1
–––1K2
–––1K5
–––1K8
–––2K0
Wattage and Tolerance
1% Tolerance
5% Tolerance
Ohmic value
40J–––
10
40F–––
10
41F–––
1
43F–––
3
45F–––
5
41J–––
1
42J–––
2
43J–––
3
45J–––
5
Part No.
Prefix
Suffix
Wattage and Tolerance
1% Tolerance
5% Tolerance
40J–––
10
40F–––
10
41F–––
1
43F–––
3
45F–––
5
41J–––
1
42J–––
2
43J–––
3
45J–––
5
0.1
0.15
0.2
0.25
0.3
0.33
0.4
0.5
0.75
1
1.5
2
2.2
3
4
5
7.5
10
12
15
18
20
22
25
27
30
33
35
39
40
47
50
56
62
68
75
82
100
120
125
150
180
200
220
225
250
270
300
330
350
390
400
450
470
500
560
600
680
750
800
820
900
1,000
1,100
1,200
1,500
1,800
2,000
2,200
2,500
2,700
3,000
3,300
3,500
3,900
4,000
4,500
4,700
5,000
6,000
6,800
7,000
7,500
8,000
9,000
10,000
12,000
13,000
15,000
17,000
20,000
22,000
25,000
30,000
33,000
35,000
40,000
50,000
–––2K2
–––2K5
–––2K7
–––3K0
–––3K3
–––3K5
–––3K9
–––4K0
–––4K5
–––4K7
–––5K0
–––6K0
–––6K8
–––7K0
–––7K5
–––8K0
–––9K0
–––10K
–––12K
–––13K
–––15K
–––17K
–––20K
–––22K
–––25K
–––30K
–––33K
–––35K
–––40K
–––50K
Shaded values
involve very fine
resistance wire
and should not
be used in criti-
cal applications
without burn-in
and/or thermal
cycling.
=
tandard values
S
=
Non-standard values subject to mini-
mum handling charge per item
40 Series
Ohmicone
®
Silicone Ceramic
Conformal Axial
Term. Wirewound
Non-Inductive
Winding
optional
RoHS
(blank= std.
Compliant
winding)
Tape & reel
optional
pc/reel:
41: 5000
42: 1250
43: 1250
45: 1000
47: 500
40: 500
41NJR10E-T
Wattage
1 = 1W
2
3
5
7
0 = 10W
Tolerance Resistance
F= 1%
R10 = 0.10Ω
J = 5%
1R0 = 1.0Ω
10R = 10.0Ω
250 =
250Ω
1K0 = 1,000Ω
4K5 = 4,500Ω
50K = 50,000Ω
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
85
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