TMB166S-L

Overview

The TMB166S-L is a Triac (Bidirectional Triode Thyristor) from the TMB16xS series, manufactured by Sanken Electric Co., Ltd. and distributed by Allegro MicroSystems, Inc. It features a peak repetitive off-state voltage of 600 V and an RMS on-state current of 16 A at a case temperature of 94°C. The device provides an isolation voltage of 1800 V AC RMS between lead and case for one minute and supports a junction temperature range of -40 to 150°C. Packaged in a 3-pin TO-220F SIP with heatsink mounting, it offers a thermal resistance of 3.0°C/W from junction to case.

Feature Summary

• Small fully-molded SIP package designed for high thermal dissipation and long life
• Enhanced reliability with increased isolation voltage and improved commutation dv/dt performance
• Uniform switching characteristics suitable for full-cycle AC applications

Applications

• Residential and commercial appliances including vacuum cleaners, rice cookers, TVs, and home entertainment systems
• White goods such as washing machines and office automation power control devices like photocopiers
• Motor control for small tools, temperature control, light dimmers, electric blankets, and general use SMPS

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm that the part number matches the specific suffix requirements for your application. Ensure storage conditions remain within standard temperature and humidity limits to prevent lead rusting or solderability issues before installation.

Selection Notes

Select this component for AC power control circuits requiring reliable uniform switching. Consider the 16 A RMS rating and 600 V blocking capability when designing for residential appliances or motor controls. Account for the 3.0°C/W thermal resistance and ensure adequate heatsinking to maintain junction temperatures within the specified operating range during continuous operation.

Part Context

This Triac belongs to the TMB16xS series, which includes variants like the TMB166(I). The series is characterized by its robust construction and enhanced electrical parameters compared to standard market products. The TMB166S-L specifically denotes the non-UL recognized version of the 600 V, 16 A device, distinguishing it from the UL-certified TMB166(I) variant.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Sanken Electric or Allegro MicroSystems directly for approved alternatives or updated components, as this part is marked 'Not Recommended for New Designs'.

FAQ

What is the maximum surge on-state current for the TMB166S-L?

The peak non-repetitive surge on-state current is 168 A for a 60 Hz full cycle sine wave and 160 A for a 50 Hz full cycle sine wave, with an initial junction temperature of 150°C.

How does the TMB166S-L improve upon standard Triacs regarding isolation?

It provides an increased isolation voltage of 1800 V AC RMS applied for up to 1 minute between the lead and the case, offering greater safety margins than many comparable products.

What are the recommended tightening torques for heatsink mounting?

The recommended torque for mounting screws is between 0.490 to 0.686 N·m (5 to 7 kgf·cm) to avoid stripping screws or deforming the product frame while ensuring effective heat radiation.