TA Series
Power Chip
Thick Film on Alumina Substrate
Ohmite’s original Power Chip resistors feature our
thick film on alumina substrate technology. These
planar packages yield space saving, 10W/in
2
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.
Series
TA203
TA303
Wattage
3.0
3.0
Series
TA205
TA305
TA605
TA805
Wattage
5.0
5.0
5.0
5.0
Series
TA207
TA307
F e AT u r e S
• High-Temp Terminal Construction
• Wide Resistance Range
• Low Inductance (50nH-100nH)
• High Power Density
• Easy to install. PC-mountable
S e r i e S S P e c i F i c AT i O N S
Wattage
7.5
7.5
Series
TA310
TA810
Wattage
10.0
10.0
Series
TA025
TA050
TA100
Wattage
25.0
50.0
100.0
chArAcTeriSTicS
Substrate
Alumina
Resistor
Thick Film
Coating
Glass
Terminals
Solder Plated Phosphor Bronze
450 ppm/°C
Temperature Coefficient
1 ohm:
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%)
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103
Test Condition
Test MILR83401
Life (Rated
40°C, rated power, 90
Power)
min ON 30 min OFF,
1000 hrs.
Life
60°C, 90 - 95% RH,
(Moisture
rated power, 90 min
Load)
ON 30 min OFF, 1000
hrs.
Temperature
Room temp > -55°C
Cycling
30 min > RT 10 min ±
120°C 30 min > RT10
min 5 cycles
Soldering
350°C Solderpot, 3
Heat
secs.
Insulation
DC 100V, 1 min
Resistance
Specification
ΔR
±( 1.0% + 0.05Ω)
ΔR
±( 1.0% + 0.05Ω)
ΔR
±( 0.25% + 0.05Ω)
Flammability
UL94V-O rated (not recognized)
ΔR
±( 0.25% + 0.05Ω)
Over 1000M ohm
(continued)
TA Series
(±.020 in. / ±.508mm)
PA
3, 5, 7.5
& 10 watt
typical
PC board
0.07"/1.78mm
P
L
0.02" x 0.015" Pins
L+0.08"/2mm max.
L
Power Chip
Thick Film on Alumina Substrate
DiMeNSiONS
Series
Wattage
P
Length L
0.50 / 12.70
0.50 / 12.70
0.50 / 12.70
0.50 / 12.70
Height H
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
TA203PA
TA303PA
H
3.0 0.200 / 5.08
3.0 0.300 / 7.62
5.0 0.200 / 5.08
5.0 0.300 / 7.62
TA205PA
TA305PA
TA605PA
0.17"/4.32mm
0. 0"/2.54mm
1
0.040" /
1.02 mm
5.0 0.600 / 15.24 1.00 / 25.40
5.0 0.800 / 20.32 1.00 / 25.40
7.5 0.200 / 5.08
7.5 0.300 / 7.62
0.75 / 19.05
0.75 / 19.05
TA805PA
TA207PA
TA307PA
PW
10, 25, 50
& 100 watt
H
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
PY
mount
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
TA025PY* 25.0
0.855" /
21.72 mm
0.240" /
6.10 mm
0.300" /
7.62 mm
0.020" /
0.51 mm
typ.
1.90 / 48.3
1.90 / 48.3
1.90 / 48.3
1.90 / 48.3
2.220 / 56.39 1.170 / 29.70
2.220 / 56.39 1.170 / 29.70
2.220 / 56.39 2.270 / 57.60
2.220 / 56.39 2.270 / 57.60
0.150" /
3.8 mm
min.
TA050PA 50.0
TA050PY* 50.0
0.150" /
3.8 mm
min.
P
0.200" /
5.08 mm
0.070" /
1.78 mm
0.040" /
1.02 mm
typ.
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.
0.195" /
4.95 mm
0.075" /
1.91 mm dia. finished pins
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%
RoHS compliant
TA305PA4K50JE
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 10-100 W
PY = high-stability
wraparound
Resistance Value (Ω)
R250 = 0.25
10R0 = 10.0
2K00 = 2,000
45K0 = 45,000
Standard part numbers for TA series
Ohmic value
Ohmic value
Part No.
Prefix
Suffix
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
TA810PW
TA025PW
TA050PW
TA100PW
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
Part Number
TA810PW
TA025PW
TA050PW
TA100PW
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
Part Number
Part No.
Prefix
Suffix
–––2K50J
–––3K00J
–––4K00J
–––4K70J
–––5K00J
–––5K10J
–––7K50J
–––10K0J
–––15K0J
–––18K0J
–––20K0J
–––30K0J
–––39K0J
–––50K0J
–––75K0J
–––100KJ
–––150KJ
–––200KJ
TA810PW
TA025PW
TA050PW
TA100PW
TA203PA
TA303PA
TA205PA
TA305PA
TA207PA
TA310PA
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
–––R250J
–––1R00J
–––1R50J
–––2R00J
–––4R70J
–––5R00J
–––5R10J
–––7R50J
–––8R20J
–––10ROJ
–––11R0J
–––12R0J
–––15R0J
–––20R0J
–––24R0J
–––27R0J
–––33R0J
–––47R0J
= Most popular standard values,
= Stock values
104
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
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