M1661S PDF Datasheet – 16A, 600V, Triac – TM1661S-L

This post explains for the triac.

The Part Number is TM1661S.

The function of this semiconductor is 16A, 600V, Triac.

The package is TO-220F type

Manufacturer: Sanken

Preview images :M1661S pdf pinout


M1661S is 16A, 600V, Triac. A Triac is a type of solid-state AC switch that can be triggered on and off at any point in the AC waveform. It is commonly used for phase control applications such as dimming lights or controlling the speed of AC motors.

1. 16A: This refers to the maximum RMS (root mean square) current that the Triac can handle. RMS current is the effective current in an AC circuit that generates the same amount of heat as an equivalent DC current.

2. 600V: This represents the maximum blocking voltage that the Triac can withstand without breakdown. It indicates the highest voltage level that the Triac can block or control effectively.

Triacs are similar in operation to thyristors, but unlike thyristors, triacs can switch both polarities of the AC waveform.

M1661S datasheet triac

It’s important to note that when using a Triac in a circuit, one must ensure that the load and application requirements do not exceed these specified ratings to avoid damage to the component and ensure safe operation.

Additionally, Triacs are typically controlled using gate pulses to switch them ON and OFF during specific portions of the AC waveform. Proper gate control and triggering are essential for effective and reliable Triac operation.


1. Repetitive peak off-state voltage: VDRM=600V

2. RMS on-state current: IT(RMS)=16A

3. Gate trigger current: IGT=30mA max

4. Isolation voltage: VISO=1500V(50Hz Sine wave, RMS)

5. UL approved type available

M1661S PDF Datasheet