50
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.
S T O C K P A R T N U M B E R S F O R S T A N D A R D R E S I S T A N C E V A L U E S
O R D E R I N G I N F O R M A T I O N
T
A305P
A
Ohmic
value
T
A203P
A
T
A303P
A
T
A205P
A
Part Number
T
A207P
A
T
A310P
A
T
A025PW
T
A050PW
T
A100PW
T
A810PW
Part No.
Prefix
Suffix
T
A305P
A
Ohmic
value
T
A203P
A
T
A303P
A
T
A205P
A
Part Number
T
A207P
A
T
A310P
A
T
A025PW
T
A050PW
T
A100PW
T
A810PW
Part No.
Prefix
Suffix
T
A305P
A
Ohmic
value
T
A203P
A
T
A303P
A
T
A205P
A
Part Number
T
A207P
A
T
A310P
A
T
A025PW
T
A050PW
T
A100PW
T
A810PW
Part No.
Prefix
Suffix
TA Series
Power Chip
Resistors
Thick Film on Alumina Substrate
Dimensions (in. / mm
Dimensions (in. /
Dimensions (in. /
)
Series Wattage P Length L Height H
TA203
TA203 3.0
3.0 0.200 /
0.200 / 5.08
5.08
5.08
5.08
0.50 /
0.50 / 12.70
12.70 0.60 /
0.60 / 15.24
15.24
TA303 3.0 0.300 / 7.62
7.62
7.62
0.50 / 12.70 0.60 / 15.24
TA205
TA205 5.0
5.0 0.200 /
0.200 / 5.08
5.08
5.08
5.08
0.50 /
0.50 / 12.70
12.70 1.00 /
1.00 / 25.40
25.40
TA305 5.0 0.300 / 7.62
7.62
7.62
0.50 / 12.70 1.00 / 25.40
TA605
TA605 5.0
5.0 0.600 /
0.600 / 15.24
15.24
15.24
15.24
1.00 /
1.00 / 25.40
25.40 0.50 /
0.50 / 12.70
12.70
TA805 5.0 0.800 / 20.32
20.32
20.32
1.00 / 25.40 0.50 / 12.70
TA207
TA207 7.5
7.5 0.200 /
0.200 / 5.08
5.08
5.08
5.08
0.75 /
0.75 / 19.05
19.05 1.00 /
1.00 / 25.40
25.40
TA307 7.5 0.300 / 7.62
7.62
7.62
0.75 / 19.05 1.00 / 25.40
TA310
TA310 10.0
10.0 0.300 /
0.300 / 7.62
7.62
7.62
7.62
1.00 /
1.00 / 25.40
25.40 1.00 /
1.00 / 25.40
25.40
TA810 10.0 0.800 / 20.32
20.32
20.32
1.00 / 25.40 1.00 / 25.40
TA025
TA025 25.0
25.0 1.90 /
1.90 / 48.3
48.3
48.3
48.3
2.220 /
2.220 / 56.39
56.39 1.170 /
1.170 / 29.70
29.70
TA050 50.0 1.90 / 48.3
48.3
48.3
2.220 / 56.39 2.270 / 57.60
TA100
TA100 100.0
100.0 4.10 /
4.10 / 104.1
104.1 4.420 /
4.420 / 112.27 2.270 /
2.270 / 57.60
57.60
H
0.020" /
0.51 mm typ.
P
L
0.150" /
3.8 mm ref.
0.200" /
5.08 mm
0.050" /
1.27 mm dia. finished pins
0.070" /
1.78 mm
0.040" /
1.02 mm
0.240" /
6.10 mm
0.300" /
7.62 mm
0.040" /
1.02 mm typ.
Solder-coated
phosphor bronze
3, 5, 7.5
& 10 watt
25, 50
& 100 watt
P
L
0.07"/1.78mm
H
0.17"/4.32mm
0.10"/2.54mm
0.
0.
0.02" x 0.015" Pins
PC board
Ohmite's original Power Chip
resistors are designed from our
thick film on alumina substrate
technology. These planar pack-
ages yield space saving, 10W/
in
2
power densities that require
over 50% less board space
than other radial packages.
Convection cooling is maxi-
mized by the planar package
configuration which dissipates
heat well above board level.
Ohmite's power chip resis-
tors have a 125% higher oper-
ating temperature range than
competitive product of similar
design. High temperature
solder and in-process plat-
ing keep terminations secure
under self-heating effects by
preventing re-flow from full
power operation.
Flexible packaging schemes
make these resistors ideal for
power supplies, audio ampli-
fiers, video fly-back, and other
power control applications.
FEATURES
High-Temp Terminal Construction
Wide Resistance Range
Low Inductance (50nH-100nH)
High Power Density
Easy to install. PC-mountable
SPECIFICATIONS
Material
Substrate: Alumina
Resistor: Thick Film
Coating: Glass
Terminals: Solder Plated
Phosphor Bronze
Thermal Conductivity:
20 Watts/Meter/C
Temperature Coefficient:
1 ohm
450 ppm/C
1 to 100
100 ppm/C
101
and up
50 ppm/C
Electrical
Tolerance: 1% and 5% (other
tolerances available)
Power Rating: Based on 25C
free air
Resistance Range: 0.5 ohm to
10M ohm. Consult factory for
other values
Maximum Operating Voltage:
350 VAC, 500 VDC through
glass, 1000 VAC, 1500 VDC
through substrate
Overload: Five times rated power,
as long as the one second aver-
age dissipation does not exceed
the wattage rating.
R: 2%, 2000 hours
Derating:
100% @ 25C to 0% @ 350C.
Power Rating:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
025 = 25
050 = 50
100 = 100
Series
Tolerance
K = 10%
J = 5%
F = 1%
Package:
PA = pin terminals,
std. for 3-10 W
PW = wraparound,
std. for 25-100 W
Resistance Value (
)
R250 = 0.25
10R0 = 10.0
2K00 = 2,000
45K0 = 45,000
Pin spacing
(on 3-10W models only)
2 = .2"
3 = .3"
8 = .8"
E = RoHS compliant
Available Jan. 2006
0.25
R250J
1.00
1R00J
1.50
1R50J
2.00
2R00J
4.70
4R70J
5.00
5R00J
5.10
5R10J
7.50
7R50J
8.20
8R20J
10.00
10ROJ
11.00
11R0J
12.00
12R0J
15.00
15R0J
20.00
20R0J
24.00
24R0J
27.00
27R0J
33.00
33R0J
47.00
47R0J
50.00
50R0J
62.00
62R0J
68.00
68R0J
75.00
75R0J
100.00
100RJ
150.00
150RJ
200.00
200RJ
250.00
250RJ
270.00
270RJ
300.00
300RJ
470.00
470RJ
500.00
560
620.00
620RJ
680.00
680RJ
1,000.00
1K00J
1,500.00
1K50J
1,800.00
1K80J
2,000.00
2K00J
2,500.00
2K50J
3,000.00
3K00J
4,000.00
4K00J
4,700.00
4K70J
5,000.00
5,000.00
5K00J
5,100.00
5K10J
7,500.00
7K50J
10,000.00
10K0J
15,000.00
15K0J
18,000.00
18,000.00
18K0J
20,000.00
20K0J
30,000.00
30K0J
39,000.00
39K0J
50,000.00
50K0J
75,000.00 75K0J
100,000
100KJ
150,000
150KJ
200,000
200KJ
= Most popular stock values, = Stock values, = Non-stock values subject to minimum handling charge per item
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