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/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 product 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 flyback, and other power control applications.
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 ERIE S S P ECI F IC A T I O N S
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
Wattage
7.5
7.5
Series
TA310
TA810
Wattage
10.0
10.0
Series
TA025
TA050
TA100
Wattage
25.0
50.0
100.0
c h a r a c t e r i st i c s
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 factory for other values
Maximum Operating Voltage 350 VAC, 500 VDC through glass,
1000 VAC, 1500 VDC through substrate, 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
Test Condition
Test MILR83401
Specification
Life (Rated 40°C, rated power, 90
Power) min ON 30 min OFF,
1000 hrs.
ΔR
±( 1.0% + 0.05Ω)
Life 60°C, 90 - 95% RH,
(Moisture rated power, 90 min
Load) ON 30 min OFF, 1000
hrs.
ΔR
±( 1.0% + 0.05Ω)
Temperature Room temp > -55°C
Cycling 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 350°C Solderpot, 3
Heat secs.
Insulation DC 100V, 1 min
Resistance
ΔR
±( 0.25% + 0.05Ω)
Over 1000M ohm
Derating 100% @ 25°C to 0% @ 180°C ambient.
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%)
102
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
(continued)
rev 6/18-1
TA Series
Power Chip
Thick Film on Alumina Substrate
DIMENSIONS
(±.020 in. / ±.508mm)
Series
L
PA
3, 5, 7.5
& 10 watt
0.045"
+.002/-.004
(0.040"
thru-hole)
H
typical
PC board
0.07"/1.78mm
0.17"/4.32mm
P
0.10"/2.54mm
0.02" x 0.015" Pins
PW
10, 25, 50
& 100 watt
L+0.08"/2mm max.
L
0.040" / 1.02 mm
0.070" /
1.78 mm
P
0.040" /
1.02 mm
typ.
0.200" / 5.08 mm
Height H
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
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
0.150" /
3.8 mm
min.
0.300" /
7.62 mm
0.020" / 0.51 mm typ.
Length L
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
0.240" /
6.10 mm
H
P
3.0 0.200 / 5.08 0.50 / 12.70 0.60 / 15.24
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
0.150" / 3.8 mm
min.
Wattage
TA203PA
0.855" /
21.72 mm
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.
0.195" /
4.95 mm
0.075" / 1.91 mm dia. finished pins
O R D ERI N G I N F O R M A T 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
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
103
TA100PW
TA050PW
TA025PW
TA810PW
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
TA310PA
TA207PA
TA205PA
TA305PA
TA303PA
TA203PA
Ohmic value
TA100PW
TA050PW
TA025PW
= Most popular standard values, = Stock values
–––50R0J
–––62R0J
–––68R0J
–––75R0J
–––100RJ
–––150RJ
–––200RJ
–––250RJ
–––270RJ
–––300RJ
–––470RJ
–––560
–––620RJ
–––680RJ
–––1K00J
–––1K50J
–––1K80J
–––2K00J
TA810PW
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
TA310PA
TA207PA
TA205PA
Ohmic value
TA305PA
TA100PW
TA303PA
TA050PW
TA203PA
TA025PW
TA810PW
TA205PA
TA305PA
TA310PA
TA303PA
TA207PA
TA203PA
–––R250J
–––1R00J
–––1R50J
–––2R00J
–––4R70J
–––5R00J
–––5R10J
–––7R50J
–––8R20J
–––10ROJ
–––11R0J
–––12R0J
–––15R0J
–––20R0J
–––24R0J
–––27R0J
–––33R0J
–––47R0J
Part Number
Part No.
Prefix
Suffix
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
Part Number
Part No.
Prefix
Suffix
Part Number
Part No.
Prefix
Suffix
Ohmic value
Standard part numbers for TA series
