Description: TYN612 Thyristor

TYN612 12A 600V Unidirectional SCR Thyristor TO-220 Silicon Control Rectifier Transistor Electronics Components Parts IC

The standard 12 A SCR series is suitable to fit all modes of control, found in applications such as over voltage crowbar protection, motor control circuits in power tools and kitchen aids, inrush current limiting circuits, capacitive discharge ignition and voltage regulation circuits. Available in through-hole or surface-mount packages, they provide an optimized performance in a limited space.

The SCR (Silicon Controlled Rectifier or Silicon Controlled Rectifier) ​​is a bistable semiconductor device formed by three pn junctions with the pnpn arrangement. The conduction between anode and cathode is controlled by the gate terminal. It is a unidirectional element, almost ideal switch, rectifier and amplifier at the same time.

The SCR requires a minimum holding current (IH) to keep it conducting and a latching current (IL) so that the device can remain conducting when the gate pulses are removed.

The SCR TYN612 is used for unidirectional conduction (one way) electrical power control; that like a rectifier diode it can conduct an Anode to Cathode (IAK) current in forward polarization and behaves virtually as an open circuit in reverse polarization (VKA) due to the high resistance it presents in reverse.

Features of TYN612- Thyristor

• On-state RMS current is 12 A
• Repetitive peak off-state voltage is 600 V
• Triggering gate current ranges from 5 mA to 15 mA
• Used as protection circuits, current limiting circuit and control circuits
• Provide optimized performance in a limited space
• Available in surface-mount and through-hole package

Technical Specification

• Dynamic resistance: 30mΩ
• I2t value for fusing: 98 A2S
• Maximum peak reverse gate voltage: 5v
• Peak gate current: 4A
• Operating temperature range: – 40 to + 125 °C
• Storage temperature: – 40 to + 150 °C

TYN612 Equivalent Thyristors

TN1215, TYN612, TYN812, TYN1012

Where to use TYN612- Thyristor?

Thyristor is a switching device but can be used in power control circuit, over-voltage protection, and many other application. It requires a gate pulse to start, it gets self-latched and stays ON until the supply get interrupted. For this, we have to use a switching circuit in connection with the main supply of the circuit or across the thyristor to turn it OFF. Here, in the name TYN612, ‘6’ represents the value of Repetitive peak off-state voltage which is 600 V and ‘12’ represents the value of On-state RMS current which is 12 A. Thyristor TYN612 is fit for all modes of control like overvoltage crowbar protection, motor control circuit, inrush current limiting circuits, capacitive discharge ignition and voltage regulation circuits.

How to use TYN612- Thyristor?

Initially, the switch S1 and S2 remains in normally-open state. When the supply ON, Thyristor remain reversed biased until the gate pulse provided. For providing gate pulse we have used Push Button S2. As the S2 switch close, thyristor turns ON and latch even we release the push button S2.

When the Thyristor has self-latched into the ON state, the only way to stop the Thyristor from conducting in this circuit is to interrupt the supply across the Thyristor. For that, we use switch S1, which short-circuit the anode and cathode, due to which the holding current get decreased to its threshold value. Therefore, Thyristor gets reset or turns OFF.

Resistance R1 used to provide sufficient gate current to turn ON the thyristor. Resistance R2 is used for decreasing the gate sensitivity and increase the dv/dt capability. Therefore, it prevents Thyristor from false triggering.

Application of TYN612- Thyristor

• Power Control
• Switching
• Zero voltage switching
• Over-voltage protection
• Pulse circuit
• Battery Charging regulator

• On-state RMS current is 12 A
• Repetitive peak off-state voltage is 600 V
• Triggering gate current ranges from 5 mA to 15 mA
• Used as protection circuits, current limiting circuit and control circuits
• Provide optimized performance in a limited space
• Available in surface-mount and through-hole package