Ohmite’s original Power Chip
resistors feature our thick film
on alumina substrate technol-
ogy. These planar packages
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
solder and in-process plat-
ing keep terminations secure
under self-heating effects by
preventing re-flow from full
power operation.
S P ꢁ C ꢄ F ꢄ C A T ꢄ O N S
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
Power Chip®
3, 5, 7.5
& 10 watt
H
1 ohm
1 to 100Ω
101Ω and up
450 ppm/°C
100 ppm/°C
50 ppm/°C
typical
PC board
0.17"/4.32mm
0.10"/2.54mm
0.07"/1.78mm
P
L
Electrical
Tolerance: ±1%, ±5% and ±10%
Power Rating: Based on 25°C
free air
Resistance Range: 0.25 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.
0.02" x 0.015" Pins
10, 25, 50
& 100 watt
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.
0.300" /
7.62 mm
0.020" / 0.51 mm typ.
0.070" /
1.78 mm
P
0.150" / 3.8 mm ref.
0.040" /
1.02 mm typ.
0.200" / 5.08 mm
Solder-coated
phosphor bronze
F ꢁ A T ꢂ ꢃ ꢁ S
• High-Temp Terminal Construction
0.050" / 1.27 mm dia. finished pins
∆R: ±2%, 2000 hours
Derating:
• Wide Resistance Range
100% @ 25°C to 0% @ 180°C
ambient.
• Low Inductance (50nH-100nH)
• High Power Density
• Easy to install. PC-mountable
Dimensions ( .ꢀ0ꢀ in. / ± ±.5088)
Series
Wattage
3.0
3.0
5.0
5.0
5.0
5.0
7.5
7.5
10.0
10.0
25.0
50.0
100.0
P
Length L
Height H
TA0ꢀ3
TA3ꢀ3
TA0ꢀ5
TA3ꢀ5
TA6ꢀ5
TA8ꢀ5
TA0ꢀ7
TA3ꢀ7
TA31ꢀ
TA81ꢀ
TAꢀ05
TAꢀ5ꢀ
TA1ꢀꢀ
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
Pin spacing
Tolerance
(on 3-10W models only) K = 10%
2 = .2"
3 = .3"
8 = .8"
J = 5%
F = 1%
RoHS compliant
T A 3 0 5 P A 4 K 5 0 J E
Series
Power Rating: Package:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
025 = 25
050 = 50
100 = 100
Resistance Value (Ω)
PA = pin terminals, R250 = 0.25
std. for 3-10 W 10R0 = 10.0
PW = wraparound, 2K00 = 2,000
std. for 10-100 W 45K0 = 45,000
Check product availability at www.ohmite.com
4.10 / 104.1 4.420 / 112.27
S ta n d a r d p a r t n u m b e r S f o r ta S e r i e S
Part Number
Part Number
Part Number
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
Part No.
Prefix
Suffix
50.00 –––50R0J
2,500.00 –––2K50J
3,000.00 –––3K00J
4,000.00 –––4K00J
4,700.00 –––4K70J
5,000.00 –––5K00J
5,100.00 –––5K10J
7,500.00 –––7K50J
10,000.00 –––10K0J
15,000.00 –––15K0J
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
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
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
= Most popular standard values, = Stock values, =
54 Ohmite Mfg. Co.
Non-standard values subject to minimum handling charge per item
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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