TA Series0 pages

Thick Film
Alumina

TA Series

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
Thermal Conductivity 20 Watts/Meter/°C
450 ppm/°C
Temperature Coefficient 1 ohm: t
1 to 100Ω:t 100 ppm/°C
101Ω and up:t 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 rating. ∆R: ±2%, 2000 hours
Derating 100% @ 25°C to 0% @ 180°C ambient.

REV 4528

High
power

Power Chip®
Thick Film on Alumina Substrate

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com