Ohmite’s original Power Chip
resistors are designed from our
thick film on alumina substrate
technology. These planar pack-
ages yield space saving, 10W/
in2 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
SPECIFICATIONS
Material
Substrate: Alumina
Resistor: Thick Film
Coating: Glass
Terminals: Solder Plated
Phosphor Bronze
Thermal Conductivity:
20 Watts/Meter/°C
Temperature Coefficient:
TA Series
®
Thick Film on Alumina Substrate
3, 5, 7.5
& 10 watt
H
1 ohm
450 ppm/°C
100 ppm/°C
50 ppm/°C
PC board
0.17"/4.32mm
0.10"/2.54mm
0.07"/1.78mm
P
L
Electrical
Tolerance: ±1% and ±5% (other
tolerances available)
Power Rating: Based on 25°C
free air
Resistance Range: 0.5 ohm to
10M ohm. Consult factory for
other values
0.02" x 0.015" Pins
25, 50
& 100 watt
solder and in-process plat-
ing keep terminations secure
under self-heating effects by
preventing re-flow from full
power operation.
0.040" / 1.02 mm
L
0.240" /
6.10 mm
H
Flexible packaging schemes
make these resistors ideal for
power supplies, audio ampli-
fiers, video fly-back, and other
power control applications.
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.
0.300" /
7.62 mm
0.020" / 0.51 mm typ
P
0.070" /
1.78 mm
0.150" / 3.8 mm ref
0.040" /
1.02 mm typ
0.200" / 5.08 mm
Solder-coated
FEATURES
• High-Temp Terminal Construction
• Wide Resistance Range
• Low Inductance (50nH-100nH)
• High Power Density
• Easy to install. PC-mountable
phosphor bronze
0.050" / 1.27 mm dia. finished pins
Derating:
100% @ 25°C to 0% @ 350°C.
Dimensions (in. / mm)
Series
Wattage
3.0
P
Length L
Height H
TA203
TA303
TA205
TA305
TA605
TA805
TA207
TA307
TA310
TA810
TA025
TA050
TA100
0.200 / 5.08
0.300 / 7.62
0.200 / 5.08
0.300 / 7.62
0.600 / 15.24
0.800 / 20.32
0.200 / 5.08
0.300 / 7.62
0.300 / 7.62
0.800 / 20.32
1.90 / 48.3
1.90 / 48.3
0.50 / 12.70
0.50 / 12.70
0.50 / 12.70
0.50 / 12.70
1.00 / 25.40
1.00 / 25.40
0.75 / 19.05
0.75 / 19.05
1.00 / 25.40
1.00 / 25.40
2.220 / 56.39
2.220 / 56.39
0.60 / 15.24
0.60 / 15.24
1.00 / 25.40
1.00 / 25.40
0.50 / 12.70
0.50 / 12.70
1.00 / 25.40
1.00 / 25.40
1.00 / 25.40
1.00 / 25.40
1.170 / 29.70
2.270 / 57.60
2.270 / 57.60
O R D E R I N G I N F O R M AT I O N
3.0
5.0
Pin spacing
(on 3-10W models only) K = 10%
2 = .2"
3 = .3"
8 = .8"
Tolerance
5.0
5.0
E = RoHS compliant
Available Jan. 2006
J = 5%
F = 1%
5.0
7.5
7.5
� ꢀ ꢁ ꢂ ꢃ ꢄ ꢀ ꢅ ꢆ ꢃ ꢂ ꢇ ꢈ
Series
Power Rating: Package:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
Resistance Value (Ω)
PA = pin terminals, R250 = 0.25
std. for 3-10 W 10R0 = 10.0
PW = wraparound, 2K00 = 2,000
std. for 25-100 W 45K0 = 45,000
10.0
10.0
25.0
50.0
100.0
025 = 25
050 = 50
100 = 100
4.10 / 104.1 4.420 / 112.27
S T O C K P A R T N U M B E R S F O R S TA N D A R D R E S I S TA N C E V A L U E S
Part Number
Part Number
Part Number
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
50.00
62.00
68.00
50R0J
2,500.00
3,000.00
4,000.00
4,700.00
5,000.00
5,100.00
7,500.00
10,000.00 –––10K0J
15,000.00 –––15K0J
18,000.00 –––18K0J
20,000.00
30,000.00
39,000.00
50,000.00
75,000.00 –––75K0J
100,000 –––100KJ
150,000 –––150KJ
2K50J
3K00J
4K00J
4K70J
5K00J
5K10J
7K50J
0.25
1.00
1.50
2.00
4.70
5.00
R250J
1R00J
1R50J
2R00J
4R70J
5R00J
5R10J
7R50J
8R20J
10ROJ
11R0J
12R0J
15R0J
20R0J
24R0J
27R0J
33R0J
47R0J
62R0J
68R0J
75R0J
100RJ
150RJ
200RJ
250RJ
270RJ
300RJ
470RJ
560
620RJ
680RJ
1K00J
1K50J
1K80J
2K00J
75.00
100.00
150.00
200.00
250.00
270.00
300.00
470.00
500.00
620.00
680.00
1,000.00
1,500.00
1,800.00
2,000.00
5.10
7.50
8.20
10.00
11.00
12.00
15.00
20.00
24.00
27.00
33.00
47.00
20K0J
30K0J
39K0J
50K0J
200,000
200KJ
Most popular stock values, Stock values, Non-stock values subject to minimum handling charge per item
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
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