Overview

Product Description

The PT8A335xA/B is special designed for ceramic heating control with 11 temperature levels(show as
below function comparison table). It can drive SCR directly and detect heater temperature by heater-self without extra temperature sensor. It has 3 keys for function setting. LCD displays and backlight indicate the working status. Build-in timer will be auto-power off after power on 1 hour for 60Hz or 1.2 hour for 50Hz.

Features

High watt density Alumina Heaters
Pulse trigger with high current for SCR
Quickly Heat-Up and Quickly Lost-Heat Recover
External adjustable to fit wide range heating plates
External adjustable to fit TCR of sensors
Full temperature compensation and insensitive to environment temperature
Internal zener
11 heat temperature settings
Auto power off for PT8A3351/3/5/7
Backlights for indicating work status
LCD screen for showing temperature setting
Dual Temperature (Fahrenheit/Centigrade) Display
Wet function: It will keep heating on state to level 2.
Dual voltage (120V/240V) operations.
Support 3 keys, on/off, up and down
SOIC-24, QFN-24 and TSSOP-24 package

Applications

Ceramic heating controller

Specifications & Technical Documents

Product Parameters

Heating Element	MCH
LED @ Heater On	Remark
Auto Off	No
On/Off Key	Three Keys (ON & OFF Key, Up/Down Key)
Driver Type	SCR

Technical Documents

Recommended Soldering Techniques

TN1.pdf

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

Request Documents

Purchase & Availability

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products

PT8A3356A