This part is a kind of semiconductor called TC533NX.

Function of this product has BASIC PID TEMPERATURE CONTROLLER.

Manufacturers : Select Automation

Image and pinout :

Some of the text within the PDF file :

BASIC PID TEMPERATURE CONTROLLER TC533NX High Performance Dual Display, 3 digit, 7 segment LED LED Status Indicator: Relay ON 3 Front Panel Control buttons TC/RTD Inputs PID, ON/OFF Control Single Setpoint o C / oF Selectable Control Output : Relay or SSR Drive Easy to use PENDING C US 1/16 DIN 52mm x 52mm ! ! ! ! ! ! ! ! ! ! FEATURES ORDERING INFORMATION Part No. TC533-NX TC533-SSR TC533NX-24 TC533-SSR-24 Supply Voltage 85 - 270V AC/DC 24V AC/DC TECHNICAL SPECIFICATIONS Control Output Relay SSR (12V DC) INPUT SPECIFICATIONS Inputs Sampling time Input Filter (FTC) Resolution Temperature Unit Indication Accuracy Thermocouple (J,K,T,R,S) / RTD (Pt100) 250 ms 0.2 to 10.0 sec Fixed 1o o TERMINAL CONNECTIONS L(+) N(-) C / oF selectable 1 2 3 4 5 + SSR 6 7 8 9 10 TC + /RTD1 TC /R [ ... ]

TC533NX PDF Datasheet Download