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The TMA204S-L is a bidirectional triode thyristor (triac) from the Sanken TMA20x series, designed for AC power control applications. It features a peak repetitive off-state voltage (VDRM) of 400 V and a peak non-repetitive off-state voltage (VDSM) of 500 V. The device supports an RMS on-state current (IT(RMS)) of 20 A at a case temperature of 53°C, with a surge on-state current (ITSM) rating of 190 A to 200 A depending on frequency. It operates within a junction temperature range of -40°C to 125°C and utilizes a 3-pin fully molded SIP (TO-220F) package with heatsink mounting capability.
Verify component authenticity by checking manufacturer markings against official datasheet branding codes. Ensure storage conditions comply with standard temperature and humidity requirements to prevent lead rust or solderability issues. Confirm that circuit designs adhere to safety requirements for lethal voltages and utilize isolation transformers during development.
Select the TMA204S-L for AC power control circuits requiring a 400 V blocking voltage and 20 A continuous current handling. Consider the TO-220F package for efficient heat dissipation via heatsink mounting. Evaluate thermal resistance and derating requirements at maximum operating conditions. Ensure gate drive parameters align with specified trigger voltage and current limits across all quadrants.
The TMA204S-L belongs to the TMA20x series of triacs manufactured by Sanken Electric Co., Ltd. This series is characterized by exceptional reliability and uniform switching capabilities. The TMA204S-L specifically offers a 400 V off-state voltage rating, distinguishing it from the 600 V rated TMA206 variants within the same family.
Publicly confirmed substitute part numbers are not available in the provided documentation.