THick Film
AluminA
Power Chip
®
Thick Film on Alumina Substrate
HigH
power
TA Series
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
Thermal Conductivity
20 Watts/Meter/°C
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
Overload
Five times rated power, as long as the one second average dissipation does not exceed the wattage rat-
ing. ∆R: ±2%, 2000 hours
Derating
100% @ 25°C to 0% @ 180°C ambient.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
REV 4528
OHMITE [ OHMITE MFG. CO. ]
