F ꢀ A T ꢁ ꢂ ꢀ S
S p ꢀ C ꢃ F ꢃ C A T ꢃ O ꢄ S
• Economical
Material
Coating: Conformal silicone-
ceramic.
40 Series
Axial Term. Wirewound, 1% and 5% Tol. Std.
• 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.
®
Ohmicone Silicone-Ceramic Conformal
Core: Ceramic.
Terminals: Solder-coated copper
clad axial. RoHS solder com-
position is 96% Sn, 3.5% Ag,
0.5% Cu
Derating
Linearly from
1.5 in. / 38.1mm
L
D
100% @ +25°C to
0% @ +275°C.
Dimensions (in. / mm)
Lead
Electrical
Series Wattage Ohms
Length
Diam.
Voltage ga.
Tolerance: ±5% (J type), ±1%
(F type) (other tolerances avail-
able).
41
42
43
45
47
40
1.0
2.0
3.0
5.0
7.0
0.10-6K 0.437 / 11.1 0.125 / 3.2
0.10-8K 0.406 / 10.3 0.219 / 5.6
0.10-20K 0.593 / 15.1 0.218 / 5.5
0.10-70K 0.937 / 23.8 0.343 / 8.7
0.10-80K 1.280 / 32.5 0.343 / 8.7
150
100
200
460
670
24
20
20
18
18
18
Power rating: Based on
25°C free air rating (other
wattages available).
Overload: Under 5 watts:
o r d e r i n g i n f o
40 Series
Ohmicone®
Non-Inductive
Winding
Optional (blank
= std. winding)
10.0 0.10-150K 1.642 / 41.7 0.406 / 10.3
1000
Silicone Ceramic
Conformal Axial
Term. Wirewound
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
RoHS
Non-Inductive versions available. Insert “N” before tolerance code. Example: 42NJ27R
Compliant
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.
4 1 N J R 1 0 E
Wattage Tolerance Resistance Value
1 = 1W F= 1%
R10 = 0.10Ω
1R0 = 1.0Ω
10R =10.0Ω
2
J = 5%
3
5
7
250 =
250Ω
1K0 = 1,000Ω
4K5 = 4,500Ω
50K = 50,000Ω
ppm/°C
0 = 10W
S ta n d a r d p a r t n u m b e r S f o r 4 0 S e r i e S
Wattage and Tolerance
Wattage and Tolerance
Wattage and Tolerance
1% Tolerance 5% Tolerance
1% Tolerance
5% Tolerance
1% Tolerance
5% Tolerance
part ꢄo.
Prefix
Suffix
part ꢄo.
Prefix
Suffix
part ꢄo.
Prefix
Suffix
0.1
–––R10
68
75
–––68R
–––75R
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
35,000 –––35K
40,000 –––40K
50,000 –––50K
0.15 –––R15
0.2 –––R20
0.25 –––R25
0.3 –––R30
0.33 –––R33
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
0.4
0.5
–––R40
–––R50
0.75 –––R75
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
–––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
Shaded values
involve very fine
resistance wire
and should not
be used in criti-
cal applications
without burn-in
and/or thermal
cycling.
1,000 –––1K0
1,100 –––1K1
1,200 –––1K2
1,500 –––1K5
1,800 –––1K8
2,000 –––2K0
= Standard values
= Non-standard values subject to mini-
mum handling charge per item
Check product availability at www.ohmite.com
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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