TMA126S-L

Overview

The TMA126S-L is a Triac (Bidirectional Triode Thyristor) from the TMA12x series manufactured by Sanken Electric USA Inc. It features a Peak Repetitive Off-State Voltage (VDRM) of 600 V and a Peak Non-Repetitive Off-State Voltage (VDSM) of 700 V. The device supports an RMS On-State Current (IT(RMS)) of 12 A at a case temperature of 77°C, with a Surge On-State Current (ITSM) of 120 A for 50 Hz full cycle sine waves. It operates within a junction temperature range of -40°C to 125°C and provides an isolation voltage of 1800 V AC RMS applied for one minute between lead and case.

Feature Summary

• Small fully-molded SIP package with heatsink mounting capability for high thermal dissipation
• Increased isolation voltage of 1800 V AC RMS guaranteed for up to one minute
• Improved commutation dv/dt and (dv/dt)c characteristics compared to other market products
• Designed for reliable, uniform switching in full-cycle AC power control applications

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 Sanken Electric distributors or Allegro MicroSystems channels. Confirm that the specific part number matches the required electrical ratings, particularly the 600 V off-state voltage. Ensure storage conditions remain within standard temperature and humidity ranges to prevent lead rusting or solderability issues before installation.

Selection Notes

Select this component for AC power control circuits requiring robust isolation and uniform switching. The 600 V rating suits mains-powered applications. Consider the TO-220F package for effective heat sinking. Verify gate trigger requirements against the controller circuit. Note that this series is marked as not recommended for new designs; evaluate alternative current models if long-term availability is critical.

Part Context

The TMA126S-L belongs to the TMA12x series of Triacs produced by Sanken Electric Co., Ltd. in Japan and sold by Allegro MicroSystems, Inc. This series is designed for general-purpose electronic equipment. The 'S' suffix indicates the specific packaging variant, while the 'L' denotes lead-free plating compliant with RoHS requirements. The device is distinct from the TMA124 variants which offer lower voltage ratings.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The datasheet explicitly states the TMA12x series is Not Recommended for New Designs. Engineers should consult Sanken Electric sales representatives for updated product recommendations suitable for new designs.