BT137S-600E,118

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Triac Type:	Logic - Sensitive Gate
Voltage - Off State:	600V
Current - On State (It (RMS)) (Max):	8A
Voltage - Gate Trigger (Vgt) (Max):	1.5V
Current - Non Rep. Surge 50, 60Hz (Itsm):	65A, 71A
Current - Gate Trigger (Igt) (Max):	10mA
Current - Hold (Ih) (Max):	20mA
Configuration:	Single
Operating Temperature:	125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Supplier Device Package:	DPAK
Base Part Number:	BT137

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Introduction

Thyristors - TRIACs are a type of semi-conductor devices used mainly in high-power AC circuits, such as motor control and lighting dimming applications. The BT137S-600E is a special type of TRIAC from STMicroelectronics, and is used often as an AC load switch, light dimmer and other similar applications. In this article, we will discuss the application fields and working principles of the BT137S-600E.

Application Fields

The most common application of the BT137S-600E is to switch electrical motor REVERSE and FORWARD with a single control signal, as the BT137S-600E has two insulated gates. In this way, two different control signals are used to turn the motor in opposite directions. This mechanism works even with high phase currents.In addition to motor control, the BT137S-600E is also used in lighting dimming applications. The BT137S-600E can be used to adjust the brightness of AC lamps, such as halogen lamps, incandescent lamps, compact fluorescents lamps, etc, to create more evenly lit surroundings.

Working Principles

The BT137S-600E has a DIAC and TRIAC, connected in a single package. The DIAC acts as a trigger and starts the conduction after a certain, preset threshold level is reached, while the TRIAC handle the main conduction phase. The working of the BT137S-600E is based on near phase-angle control. The two insulated gates, connected to the main semiconductor, are used to select and adjust the phase angles based on the supply AC voltage waveform. Based on the angles selected and the settings of the pre-set resistance, the current flowing through the BT137S-600E can be adjusted.The BT137S-600E can also be used in zero current control operation. In this operation mode, the load current is adjusted to a level close to zero at a specific AC waveform angle. This may be done to prevent overload, over heating, etc.

Conclusion

The BT137S-600E is a specialized type of TRIAC from STMicroelectronics, used for various AC load switching and dimming applications. It has two insulated gates and is based on near phase-angle control. It can be used to turn motors REVERSE and FORWARD, as well as dim lighting systems. It can also work in zero current control operations to prevent overload and over heating.

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