What is ST-40?


This is Thyristor, SCR.

A Silicon Controlled Rectifier (SCR) is a type of semiconductor device that is widely used as a switch or rectifier in power control and voltage regulation circuits. It is a three-layer, four-terminal device that can control the flow of current in either direction and provide full-wave rectification in power conversion applications.


[PDF] Complete Technical Details can be found in the ST-40 datasheet provided at this page.

Summary in PDF File


Teccor brand Thyristors Standard Bidirectional DIAC Trigger HTxxx HTMxxx STxxx Series Description The HTM HT and ST series of bilateral trigger DIACs offer a range of voltage characteristics from 27V to 70V A DIAC semiconductor is a full wave or bidirectional Thyristor It is triggered from a blocking state to a conduction state for either polarity of applied voltage whenever the amplitude of applied voltage exceeds the breakover voltage of the DIAC Features Bene ts t compliant ST Series t QPYZ 4 QBDLBHF DO 214 t JHI UFNQFSBUVSF TPMEFS bonded die attachment HTM HT Series t 0 USJHHFS package t JMBUFSBM USJHHFSJOH EFWJDF t MBTT QBTTJWBUFE junctions 8JEF WPMUBHF SBOHF t selections t POH UFSN SFMJBCJMJUZ t 1BSBNFUFS TUBCJMJUZ t 3FMJBCMF CBSSJFS BHBJOTU junction contamination Applications DIACs are used to trigger Triacs and SCRs in phase control circuits for lamp dimming universal motor speed control and heat control They are used also for triggering transistors in solid state ballast lighting controls Schematic Symbol Absolute Maximum Ratings Symbol ITRM TS TJ PD AV Parameter Pulse On State Current Storage T emperature Range Operating Junction Temperature Device Power Dissipation TA 4

Datasheet Download (PDF)

[ Detailed Data ]

The SCR can be triggered or turned on by a small trigger current or voltage applied to its gate terminal, and it remains in the conducting state as long as the anode-to-cathode voltage is positive and the gate trigger current is maintained. The SCR can be turned off by reducing the anode-to-cathode voltage to zero or by removing the gate trigger current. SCRs are widely used in power control and regulation applications, such as lighting and heating control, motor control, battery chargers, and AC-to-DC power conversion, due to their high voltage and current handling capabilities, fast switching speeds, and high reliability.

Manufacturers : Littelfuse

LITTELFUSE - ST-40 Datasheet PDF

LITTELFUSE ST-40 THYRISTOR

Thyristor, SCR

HST-4047S Datasheet PDF
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Datasheet ST-40.PDF DownLoad ( LITTELFUSE )

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