TMA124S-L

Overview

The TMA124S-L is a Triac (Bidirectional Triode Thyristor) from the TMA12x series, manufactured by Sanken Electric USA Inc. and distributed by Allegro MicroSystems. It features a Peak Repetitive Off-State Voltage (VDRM) of 400 V and an RMS On-State Current (IT(RMS)) of 12 A at a case temperature of 77°C. The device provides an isolation voltage of 1800 V AC RMS between lead and case for one minute and supports a peak non-repetitive off-state voltage (VDSM) of 500 V. It utilizes a 3-pin fully molded SIP package with heatsink mounting capability.

Feature Summary

• Small fully-molded SIP package designed for high thermal dissipation and long life
• Enhanced isolation voltage of 1800 V AC RMS guaranteed for up to 1 minute
• Improved commutation dv/dt and (dv/dt)c characteristics compared to standard market products
• Uniform switching performance suitable for full-cycle AC applications

Applications

• Residential and commercial appliances such as vacuum cleaners, rice cookers, TVs, and home entertainment systems
• White goods including washing machines
• Office automation power control and photocopiers
• Motor control for small tools
• Temperature control, light dimmers, electric blankets, and general use switching mode power supplies

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific part number matches the required electrical ratings, particularly the 400 V off-state voltage. Ensure handling procedures adhere to electrostatic discharge precautions during storage and installation to maintain device integrity.

Selection Notes

Select this component for AC power control applications requiring 12 A continuous current and 400 V blocking voltage. Consider the TO-220F package for effective heat sinking in high-power scenarios. Evaluate thermal resistance requirements based on ambient conditions and ensure compliance with safety standards for lethal voltage operation.

Part Context

This Triac belongs to the TMA12x series, which includes variants with 600 V ratings. The TMA124S-L specifically denotes the 400 V version without UL recognition suffixes. The series is noted as not recommended for new designs, indicating potential obsolescence or replacement availability.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult Sanken Electric or Allegro MicroSystems for updated alternatives or cross-reference options compatible with 400 V, 12 A Triac specifications.