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102
TA Series
Power Chip
Thick Film on Alumina Substrate
Series Wattage
TA203 3.0
TA303 3.0
Substrate Alumina
Resistor Thick Film
Coating Glass
Terminals Solder Plated Phosphor Bronze
Temperature Coefficient 1 ohm: 450 ppm/°C
1 to 100Ω: 100 ppm/°C
101Ω and up: 50 ppm/°C
Tolerance ±1%, ±5% and ±10%
Power Rating Based on 25°C free air
Resistance Range 0.25 ohm to 10M ohm. Consult fac-
tory for other values
Maximum Operating Voltage 350 VAC, 500 VDC through glass,
1000 VAC, 1500 VDC through sub-
strate, not to exceed power rating
Overload Five times rated power, as long as the
one second average dissipation does
not exceed the wattage rating. ∆R:
±2%, 2000 hours
Derating 100% @ 25°C to 0% @ 180°C ambi-
ent.
Equivalent Parallel Capacitance 1.0pf (100 MHz)
Withstanding Voltage 5000V thru back side
Operating Temperature Range -55°C to +180°C
Overload Current 20 x rated current up to 8 ms (ΔR ±
0.5%)
Test
Test Condition
MILR83401
Specification
Life (Rated
Power)
40°C, rated power, 90
min ON 30 min OFF,
1000 hrs.
ΔR
±( 1.0% + 0.05Ω)
Life
(Moisture
Load)
60°C, 90 - 95% RH,
rated power, 90 min
ON 30 min OFF, 1000
hrs.
ΔR
±( 1.0% + 0.05Ω)
Temperature
Cycling
Room temp > -55°C
30 min > RT 10 min ±
120°C 30 min > RT10
min 5 cycles
ΔR
±( 0.25% + 0.05Ω)
Flammability UL94V-O rated (not recognized)
Soldering
Heat
350°C Solderpot, 3
secs.
ΔR
±( 0.25% + 0.05Ω)
Insulation
Resistance
DC 100V, 1 min Over 1000M ohm
Ohmite’s original Power Chip resistors feature our
thick film on alumina substrate technology. These
planar packages yield space saving, 10W/in2 power
densities that require over 50% less board space
than other radial packages. Convection cooling is
maximized by the planar package configuration
which dissipates heat well above board level.
Ohmite’s power chip resistors have a 125% higher
operating temperature range than competitive prod-
uct of similar design. High temperature solder and
in-process plating 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 amplifiers, 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
CHARACTERISTICS
SERIES SPECIFICATIONS
Series Wattage
TA205 5.0
TA305 5.0
TA605 5.0
TA805 5.0
Series Wattage
TA207 7.5
TA307 7.5
Series Wattage
TA310 10.0
TA810 10.0
Series Wattage
TA025 25.0
TA050 50.0
TA100 100.0
(continued)
rev 6/18-1
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Series Wattage P Length L Height H
TA203PA 3.0 0.200 / 5.08 0.50 / 12.70 0.60 / 15.24
TA303PA 3.0 0.300 / 7.62 0.50 / 12.70 0.60 / 15.24
TA205PA 5.0 0.200 / 5.08 0.50 / 12.70 1.00 / 25.40
TA305PA 5.0 0.300 / 7.62 0.50 / 12.70 1.00 / 25.40
TA605PA 5.0 0.600 / 15.24 1.00 / 25.40 0.50 / 12.70
TA805PA 5.0 0.800 / 20.32 1.00 / 25.40 0.50 / 12.70
TA207PA 7.5 0.200 / 5.08 0.75 / 19.05 1.00 / 25.40
TA307PA 7.5 0.300 / 7.62 0.75 / 19.05 1.00 / 25.40
TA310PA 10.0 0.300 / 7.62 1.00 / 25.40 1.00 / 25.40
TA310PW* 10.0 0.300 / 7.62 1.085 / 27.56 1.00 / 25.40
TA810PA 10.0 0.800 / 20.32 1.00 / 25.40 1.00 / 25.40
TA810PW* 10.0 0.800 / 20.32 1.085 / 27.56 1.00 / 25.40
TA025PA 25.0 1.90 / 48.3 2.220 / 56.39 1.170 / 29.70
TA025PY* 25.0 1.90 / 48.3 2.220 / 56.39 1.170 / 29.70
TA050PA 50.0 1.90 / 48.3 2.220 / 56.39 2.270 / 57.60
TA050PY* 50.0 1.90 / 48.3 2.220 / 56.39 2.270 / 57.60
TA100PA 100.0 4.10 / 104.1 4.420 / 112.27 2.270 / 57.60
TA100PY* 100.0 4.10 / 104.1 4.420 / 112.27 2.270 / 57.60
*10-100 watts available in PW,PA, and PY packages.
Power Rating:
03 = 3 W
05 = 5
07 = 7.5
10 = 10
025 = 25
050 = 50
100 = 100
TA305PA4K50JE
Series
Tolerance
K = 10%
J = 5%
F = 1%
Package:
PA = pin terminals,
std. for 3-10 W
PW = wraparound,
std. for 10-100 W
PY = high-stability
wraparound
Resistance Value (Ω)
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"
RoHS compliant
H
0.020" / 0.51 mm typ.
P
L
L+0.08"/2mm max.
0.200" / 5.08 mm
0.075" / 1.91 mm dia. finished pins
0.070" /
1.78 mm
0.040" / 1.02 mm
0.240" /
6.10 mm
0.300" /
7.62 mm
0.195" /
4.95 mm
0.855" /
21.72 mm
0.040" /
1.02 mm
typ.
PA
3, 5, 7.5
& 10 watt
PW
10, 25, 50
& 100 watt PY
mount
P
L
0.07"/1.78mm
H
0.17"/4.32mm
0.10"/2.54mm
0.045"
+.002/-.004
(0.040"
thru-hole)
0.02" x 0.015" Pins
typical
PC board
0.150" / 3.8 mm
min.
0.150" /
3.8 mm
min.
Standard part numbers for TA series
= Most popular standard values, = Stock values
DIMENSIONS
(±.020 in. / ±.508mm)
TA Series
Power Chip
Thick Film on Alumina Substrate
ORDERING INFORMATION
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
TA305PA
Ohmic value
TA203PA
TA303PA
TA205PA
Part Number
TA207PA
TA310PA
TA025PW
TA050PW
TA100PW
TA810PW
Part No.
Prefix
Suffix
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 –––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
