TA Series
Power Chip Resistors
Thick Film on Alumina Substrate
®
3, 5, 7.5
& 10 watt
H
typical
PC board
0.07"/1.78mm
P
L
0.02" x 0.015" Pins
0.17"/4.32mm
0.10"/2.54mm
25, 50
& 100 watt
0.040" /
1.02 mm
L
H
0.240" /
6.10 mm
0.300" /
7.62 mm
0.020" /
0.51 mm
typ.
0.150" /
3.8 mm
ref.
P
0.200" /
5.08 mm
0.070" /
1.78 mm
0.040" /
1.02 mm
typ.
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 100Ω
100 ppm/°C
101Ω and up
50 ppm/°C
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
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% @ 25°C to 0% @ 350°C.
0.050" /
1.27 mm dia. finished pins
Solder-coated
phosphor bronze
Series
Wattage
P
Dimensions (in. /
mm
)
Length L
Height H
TA203
TA303
TA205
TA305
TA605
TA805
TA207
TA307
TA310
TA810
TA025
TA050
TA100
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
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
4.10 /
104.1
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
4.420 /
112.27
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
(on 3-10W models only)
2 = .2"
3 = .3"
8 = .8"
Tolerance
K = 10%
J = 5%
F = 1%
E = RoHS compliant
Available Jan. 2006
½½½½½½½½½½½½½
Series
Power Rating:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
025 = 25
050 = 50
100 = 100
Package:
PA = pin terminals,
std. for 3-10 W
PW = wraparound,
std. for 25-100 W
Resistance Value (Ω)
R250 = 0.25
10R0 = 10.0
2K00 = 2,000
45K0 = 45,000
S T O C K PA RT 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 VA L U E S
Ohmic value
Ohmic value
TA810PW
TA025PW
TA050PW
TA100PW
TA810PW
TA025PW
TA050PW
TA100PW
TA810PW
TA025PW
TA050PW
TA100PW
Part No.
Prefix
Suffix
–––R250J
–––1R00J
–––1R50J
–––2R00J
–––4R70J
–––5R00J
–––5R10J
–––7R50J
–––8R20J
–––10ROJ
–––11R0J
–––12R0J
–––15R0J
–––20R0J
–––24R0J
–––27R0J
–––33R0J
–––47R0J
Part No.
Prefix
Suffix
–––50R0J
–––62R0J
–––68R0J
–––75R0J
–––100RJ
–––150RJ
–––200RJ
–––250RJ
–––270RJ
–––300RJ
–––470RJ
–––560
–––620RJ
–––680RJ
–––1K00J
–––1K50J
–––1K80J
–––2K00J
Ohmic value
Part Number
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
Part Number
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
Part Number
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
Part No.
Prefix
Suffix
–––2K50J
–––3K00J
–––4K00J
–––4K70J
–––5K00J
–––5K10J
–––7K50J
–––10K0J
–––15K0J
–––18K0J
–––20K0J
–––30K0J
–––39K0J
–––50K0J
–––75K0J
–––100KJ
–––150KJ
–––200KJ
0.25
1.00
1.50
2.00
4.70
5.00
5.10
7.50
8.20
10.00
11.00
12.00
15.00
20.00
24.00
27.00
33.00
47.00
50.00
62.00
68.00
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
2,500.00
3,000.00
4,000.00
4,700.00
5,000.00
5,100.00
7,500.00
10,000.00
15,000.00
18,000.00
20,000.00
30,000.00
39,000.00
50,000.00
75,000.00
100,000
150,000
200,000
= 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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