TMA84S-L

Overview

The TMA84S-L is a Triac (Bidirectional Triode Thyristor) from the Sanken Electric USA Inc. TMA8x Series, designed for AC power control in full-cycle applications. It features an 8 ARMS on-state current and a peak repetitive off-state voltage (VDRM) of 400 V. The device utilizes a small fully-molded SIP package with heatsink mounting capability to ensure high thermal dissipation and long life. Key electrical specifications include an isolation voltage of 1800 V AC RMS applied for 1 minute between lead and case, and a peak non-repetitive off-state voltage (VDSM) of 500 V. The junction temperature range spans from -40°C to 125°C.

Feature Summary

• Provides reliable, uniform switching for full-cycle AC applications
• Features increased isolation voltage compared to standard market products
• Small fully-molded SIP package with heatsink mounting for high thermal dissipation

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, and electric blankets

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific part number matches the required voltage rating and package type. Check for any obsolescence notices, as this series may be marked not recommended for new designs. Ensure storage conditions comply with standard temperature and humidity requirements to prevent lead rust or solderability issues before use.

Selection Notes

Select the TMA84S-L when a 400 V off-state voltage rating is sufficient for the application. Consider the 8 A RMS current capacity and TO-220F package for thermal management needs. Evaluate the improved commutation dv/dt characteristics if operating in environments with rapid voltage changes. Ensure the design accommodates the specified junction temperature range and isolation voltage requirements for safety compliance.

Part Context

This component belongs to the TMA8x Series of Triacs manufactured by Sanken Electric Co., Ltd. and sold by Allegro MicroSystems, Inc. The series includes variants with different voltage ratings, such as the TMA86x for 600 V applications. The TMA84S-L specifically denotes the 400 V version without UL recognition suffixes, packaged in a 3-pin fully molded SIP with heatsink mount.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official cross-reference tools or contact manufacturers directly for parametrically similar parts.