Diodes Incorporated
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NTC+LCD Heating Controller

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Product Description

The PT8A3362H is a mixed signal CMOS LSI chip designed as heating controller with help of external NTC (Negative Temperature Component). NTC open protection is implemented for device safety and 11 temperature levels. It can drive SCR directly. It has 3 keys function setting. LCD displays and backlight indicate the working status. This device can be used in both 120V and 240V power line supplier, as it will automatically adjust the heating power according to the power line voltage to avoid heating appliance damage or long heating time. The PT8A3362H build-in timer will be auto-power off after power on 1 hour both 60Hz and 50Hz.


  • LCD screen showing temperature setting
  • Dual Temperature (Fahrenheit/Centigrade) Display
  • Backlights indicating work status
  • Auto temperature control with NTC
  • NTC open protection
  • Pulse trigger for high current SCR (up to 15mA)
  • Auto power off.
  • Dual Voltage (120V/240V) operations
  • Internal 5V zener
  • Package: SOIC-24, TQFN-24 and TSSOP-24 package


  • Heating Controller

Product Specifications

Product Parameters

Heating Element Mica/PTC
LED @ Heater On Remark
Auto Off Yes
On/Off Key Three Keys (ON & OFF Key, Up/Down Key)
Driver Type SCR

Technical Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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