November 24, 2016
Mitsubishi Materials Corporation

Development of the world's first fully-monolithic thermistor guaranteed for 200°C operation
Mitsubishi Materials Corporation (President: Akira Takeuchi, capitalization: 119.4 billion yen) has developed theworld's first fully-monolithic structure*1 high temperature chip thermistor guaranteed to work in 200°C
environments typical in or near an automobile’s engine by using an electrically conductive adhesive*2 instead of
conventional lead solder. Production starts in December 2016.

Electronic management of various sensing parts which use sensors to measure and affect systems has progressed inrecent years to improve safety and effects on the environment in the automotive and industrial equipment markets.
In particular, electronics which can be guaranteed to operate near engines and transmissions in harsh environments
exceeding 150°C are particularly in demand. We responded to this need by developing our “TA Series High
Temperature Chip Thermistor" which can be available in many sizes and can be used in small applications such as
mobile phones all the way larger applications like power supplies, industrial motors, and automobiles.

High temperature chip thermistor features:
1. AEC-Q200*3 compliant for automotive powertrain or safety equipment
2. We developed a new AgPd (silver/palladium) external electrode to achieve high bonding reliability with
conductive adhesive even at high temperatures. (fig. 2)
3. The monolithic structure and our uniquely developed thermistor material paired with our high reliability
terminal electrode technology ensures excellent stability at high temperatures and the amount ofresistance change is only 0.6% after a 2000 hour 250°C reliability test. (fig. 3) New small sizes will beavailable for miniaturization.

Mitsubishi Materials Electronic Materials Company promotes marketing-led research and development of highvalue-added products for our “Materials Premium 2016” medium-term management plan. We will continue todevelop unique high value-added products that anticipate market needs and offer them to our customers.

*1. Fully monolithic structure means the thermistor is made of a single sintered composite oxide element which is coatedby glass and has electrodes placed on the ends.
*2. Conductive adhesive relaxes the stress caused by thermal expansion and shrinkage of the PCB and the and allows forhigh reliability through many cycles of extreme temperature changes. It is environmentally friendly lead-free.
*3. AEC-Q200 is a requirement by the Automotive Electronics Council, which is an organization founded by major
automobile manufacturers and US electronic suppliers for the standardization of automotive parts reliability testing.

<New product specification>
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Part number:
Size:
Nominal resistance value @ 25°C:
Nominal B constant @ 25°C/50°C:
Operating temperature range:

TA05-3N333F (*Additional resistance values will be added)
1005 size (1.0 x 0.5 x 0.5 mm)
33kΩ ± 1.0%3650 K ± 1.0%
-40°C to +200°C

Fig.1 Appearance of TA thermistor series

Glass coating on 4 sides

AgPd electrode

Thermistor element

Fig.2 TA series cross-section

250°C reliability test
Change in resistance vs. Rnom @ 25°C

5%
4%
3%

0.6% change

2%
1%0%

500

1000

1500

2000

Elapsed time (in hours)

Fig.3 Resistance change after 2000 hour 250°C reliability test
(Mean values obtained by measuring 20 samples per test)