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Multilayer NTC thermistors

NTC Thermistors contribute to high accuracy temperature sensing and high reliability.
circuit protection multilayer NTC-thermistors shadow

Features

Panasonic NTC Thermistors have the following features at the top level of the industry.

  • A wide range of temperature coefficients and resistance values are available in the surface mount type (01005, 0201, 0402, 0603 size).
  • Achieved high reliability with a laminated structure and unique external electrode formation technology.
  • Wide lineup of resistance temp. coefficient (B value) and resistance values.
  • Highly reliable multilayer / monolithic structure / unique electrode design (Operating temperature range: –40 to 125°C).
  • Automotive grade line-up with high heat resistance (usage up to 150°C)

What are NTC thermistors?

circuit protection multilayer NTC thermistors appearance

NTC thermistors is a ceramic component and it changes its resistance value as the ambient temperature changes.

Construction

circuit protection multilayer NTC thermistors construction

The multilayered structure enables to design various resistance values.

Temperature characteristics

circuit protection multilayer NTC thermistors Temperature characteristics

As the temperature increases, the resistance value decreases.

The bigger the B-value, the resistance value changes become large.

Element Technology

circuit protection multilayer NTC thermistors Thermistor comparison conventional

Realized high-reliability by creating a high-insulation layer, using our electrode forming technique!

Conventional technology

  1. External electrode
  2. Intermediate electrode
  3. Substrate electrode
  4. Semiconductive Ceramics
  5. Active area
  6. Internal electrode

Due to not having a high-resistance layer, it is easily affected by external factors: reflow soldering, surrounding environment and atmosphere.

circuit protection multilayer NTC thermistors Thermistor comparison panasonic

Panasonic technology

  1. External electrode
  2. Intermediate electrode
  3. Substrate electrode
  4. Semiconductive Ceramics
  5. Active area
  6. Internal electrode
  7. High resistance layer

The internal electrodes are protected by a high-resistance layer, so it’s not easily affected by external factors: reflow soldering, surrounding environment and atmosphere.

Change in resistance value

circuit protection multilayer NTC Thermistor comparison

Image of change in resistance value through the reflow soldering and reliability test.

Panasonic Thermistors maintain temperature control in high precision for a long period.

Basic reliability tests

Items Testing methods Evaluation items Automotive General
High precision Standard
Shock resistance Shock waveform:
Semisinusoidal wave 11ms
Impact acceleration: 50G
Impact direction: X-X’ ,Y-Y’, Z-Z’(3 times for each direction)
Change rate of Resistance Within ±2% - -
Change rate of B-value Within ±1% - -
Temperature cycle -40 (Automotive: -55) ±3°C (30±3min)
  • Room temp. (3min max)
  • 125±3°C (30±3min)
  • Room temp. (3min max)

The operation prescribed above is one cycle, and repeat it for 100 times
(Automotive: repeat 2000 times)

Change rate of Resistance Within ±2% Within ±2% Within ±3%
Change rate of B-value Within ±1% Within ±1% Within ±2%
Moisture resistance Testing temperature: 85±2°C
Relative humidity: 85±5%
Testing time: 1000+48/0 hours
(Automotive: 2000+48/0 hours)
Change rate of Resistance Within ±2% Within ±3% Within ±3%
Change rate of B-value Within ±1% Within ±1% Within ±2%
Damp heat load Testing temperature: 85±2°C
Relative humidity: 85±5%
Power applying: 10mW
Testing time: 1000+48/0 hours
(Automotive: 2000+48/0 hours)
Change rate of Resistance Within ±2% Within ±2% Within ±3%
Change rate of B-value Within ±1% Within ±1% Within ±2%
Low temperature storage Testing temperature: -40±3°C
Testing time: 1000+48/0 hours
(Automotive: 2000+48/0 hours)
Change rate of Resistance Within ±2% Within ±2% Within ±3%
Change rate of B-value Within ±1% Within ±1% Within ±2%
High temperature storage #1 Testing temperature: 85±3°C
Testing time: 1000+48/0 hours
Change rate of Resistance - Within ±2% -
Change rate of B-value - Within ±1% -
High temperature storage #2 Testing temperature: 125±3°C
(Automotive: 2000+48/0 hours)
Change rate of Resistance Within ±2% Within ±2% Within ±3%
Change rate of B-value Within ±1% Within ±1% Within ±2%
High temperature storage #3 Testing temperature: 150±3°C
Testing time: 1000+48/0 hours
Change rate of Resistance Within ±3% - -
Change rate of B-value Within ±2% - -

Example of multilayer thermistors usage - Smartphones

circuit protection multilayer NTC thermistors Usage example smartphone

1. Heating detection of LED for camera module

Consecutive light emission by photographing still images and moving images causes temperature rising.

We recommend ultracompact type to incorporate Thermistors module.

  • Ultracompact (01005) type
  • Recommended P/N: ERTJAEG104F

2. Temperature detection of CPU

To control the heat of high-speed CPU

  • Compact type (0201)
  • Ultracompact type (01005)
  • Recommended P/Ns:
  1. ERTJZEG103FA
  2. ERTJAEG103FA

3. Temperature detection of quarts oscillator

It detects the temperature change and corrects the oscillating frequency, which are highly accurate.

  • Type 0201
  • Recommended P/N: ERTJZER104F

4. Temperature detection of battery pack

Compact and high-accuracy type

Example of multilayer thermistors usage - Automotive equipment (ECU)

circuit protection multilayer NTC thermistors Usage example Automotive ECU

We provide you automotive grade components that have high heat resistance (150°C), high accuracy and high reliability.

1. Car navigation

  • Temperature detection for power amplifier and LCD

2. Air conditioner

  • To detect the interior temperature 

3. LED light

  • To detect temperature of LED lights

Thermistors enable automotive devices to miniaturize, lighten, detect temperature in high accuracy and reduce the cost.

Example of multilayer thermistors usage - Automotive equipment (HEV, PHEV, EV)

HEV/PHEV/EV related

  • BMS (Battery Management System)
  • Electric compressor
  • Electric pump
  • IPM (Intelligent Power Module)
  • DCDC converter
  • Regeneration brake
circuit protection multilayer NTC thermistors Usage HEV PHEV EV

Our product lines

circuit protection multilayer NTC thermistors
MULTILAYER NTC THERMISTORS

Designed for automotive applications

High reliability and high accuracy automotive grade NTC thermistors. AEC-Q200-qualified.
circuit protection multilayer NTC thermistors
MULTILAYER NTC THERMISTORS

Wide selection

- High reliability
- High accuracy