This part is a kind of semiconductor called BTA40-400A.

Function of this product has (BTA40-xxxx) Standard triac.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

BTA40 A/B STANDARD TRIACS HIGH SURGE CURRENT CAPABILITY COMMUTATION : (dV/dt)c > 10V/µs BTA Family : INSULATING VOLTAGE = 2500V(RMS) (UL RECOGNIZED : E81734) A1 DESCRIPTION The BTA40 A/B triac family are high performance glass passivated PNPN devices. These parts are suitables for general purpose applications where high surge current capability is required. Application such as phase control and static switching on inductive or resistive load. ABSOLUTE RATINGS (limiting values) Symbol IT(RMS) RMS on-state current (360° conduction angle) Non repetitive surge peak on-state current ( Tj initial = 25°C ) I2t value Critical rate of rise of on-state current Gate supply : IG = 500mA diG/dt = 1A/µs Parameter Tc = 75 °C Value 40 Unit A . . . FEATURES A2 G RD91 (Plastic) [ ... ]

BTA40-400A PDF Datasheet Download