TMA166H-L

Overview

The TMA166H-L is a Triac (Bidirectional Triode Thyristor) manufactured by Sanken Electric USA Inc. and distributed by Allegro MicroSystems, designed for AC power control applications. It features a peak repetitive off-state voltage of 600 V and an RMS on-state current rating of 16 A at a case temperature of 65°C. The device provides an isolation voltage of 1800 V AC RMS between the lead and case. It operates within a junction temperature range of -40 to 125°C and utilizes a 3-pin fully molded SIP package with heatsink mounting capability.

Feature Summary

• Small fully-molded SIP package with heatsink mounting for high thermal dissipation
• Increased isolation voltage rated at 1800 V AC RMS
• Improved commutation dv/dt and critical rising rate of off-state voltage during commutation
• UL Recognized Component status

Applications

• Residential and commercial appliances including vacuum cleaners, rice cookers, TVs, and home entertainment systems
• White goods such as 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 RoHS compliance and Pb-free leadframe plating specifications. Ensure storage conditions remain within standard temperature and humidity ranges to prevent solderability issues. Review UL recognition details for safety certification requirements in final equipment design.

Selection Notes

Select this component for full-cycle AC power control requiring uniform switching characteristics. Consider the 16 A RMS current rating and 600 V blocking voltage for mains power applications. Evaluate the TO-220F package for thermal management needs, noting the 3.3 °C/W junction-to-case thermal resistance. Verify gate trigger parameters against controller capabilities for reliable turn-on across all quadrants.

Part Context

This Triac belongs to the bidirectional triode thyristor category, functioning as a solid-state switch for alternating current. It serves as an alternative to mechanical relays in AC power control circuits. The device integrates three terminals: Main Terminal 1 (T1), Main Terminal 2 (T2), and Gate (G). It is suitable for replacing older generation Triacs where higher isolation voltage and improved commutation performance are required.

Replacement Considerations

Cross-reference with other 16 A, 600 V Triacs in TO-220F packages. Verify pinout compatibility (T1, T2, G) and thermal resistance values. Check if equivalent devices meet the 1800 V isolation voltage requirement. Ensure replacement parts support the same junction temperature range and UL recognition status.