TMA54S-L

Overview

The TMA54S-L is a bidirectional triode thyristor (triac) from the Sanken Electric TMA5x 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 5 A at a case temperature of 102°C with a full conduction angle. Surge on-state current capabilities are rated at 53 A for 60 Hz and 50 A for 50 Hz conditions. It utilizes a 3-pin fully molded SIP package (TO-220F) providing high isolation voltage of 1800 V AC RMS between lead and case.

Feature Summary

• Small fully-molded SIP package with heatsink mounting capability for high thermal dissipation
• Enhanced isolation voltage of 1800 V AC RMS guaranteed for up to 1 minute
• Improved commutation dv/dt performance for uniform switching
• Halogen-free construction compliant with RoHS requirements

Applications

• Residential and commercial appliances including vacuum cleaners, rice cookers, TVs, and home entertainment systems
• White goods such as washing machines requiring two-phase motor control
• Office automation power control devices like photocopiers and laser beam printers
• Temperature control systems, light dimmers, and electric blankets
• General use switching mode power supplies (SMPS) for in-rush current control

Procurement Notes

Verify component authenticity through authorized Sanken Electric or Allegro MicroSystems channels. Confirm that the specific lot code matches manufacturing records. Ensure storage conditions remain within standard temperature and humidity ranges to prevent lead oxidation. Inspect solderability prior to assembly if inventory has been stored for extended periods. Validate compliance with applicable safety standards for lethal voltage handling during circuit development.

Selection Notes

Select this component for AC power control circuits requiring 400 V blocking capability and 5 A continuous current handling. Consider the TO-220F package for efficient heat dissipation when mounting to a heatsink. Evaluate thermal resistance characteristics against ambient operating temperatures. Ensure gate trigger parameters align with controller output capabilities across all quadrants. Verify insulation requirements meet the 1800 V AC RMS isolation specification for safety-critical designs.

Part Context

The TMA54S-L belongs to the TMA5x series of triacs manufactured by Sanken Electric Co., Ltd. This series is positioned for general-purpose electronic equipment and household appliances. The product is distributed by Allegro MicroSystems, Inc. in certain regions. The series emphasizes reliability and uniform switching characteristics for full-cycle AC applications compared to other market offerings.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Sanken Electric technical support for validated cross-reference recommendations. Alternative components must match the 400 V VDRM rating, 5 A IT(RMS) capacity, and TO-220F package dimensions. Verify equivalent isolation voltage and gate trigger specifications before implementation.

FAQ

What is the maximum isolation voltage rating for the TMA54S-L?

The TMA54S-L provides an isolation voltage of 1800 V AC RMS applied for 1 minute between the lead and the case.

How does the TMA54S-L handle surge currents?

The device supports a peak non-repetitive surge on-state current of 53 A at 60 Hz and 50 A at 50 Hz, with an initial junction temperature of 125°C.

Is the TMA54S-L suitable for new designs?

No, the datasheet explicitly marks the TMA5x series, including the TMA54S-L, as 'Not Recommended for New Designs'.