Triac Applications - Electronic Circuits and Diagrams-Electronic Projects and Design

 

bt136 applications

Triacs BT series E sensitive gate Fig Maximum on-state dissipation, Ptot, versus rms on-state current, IT(RMS), where α = conduction angle. Fig Maximum permissible non-repetitive peak on-state current ITSM, versus pulse width tp, for sinusoidal currents, tp . Applications of BT Universally useful in motor control; General purpose switching; TRIAC BT TRIAC BT is also comes under TRIAC family, it has current rate of 9AMPs. The main difference between BT and BT is current rate and BT TRIACS are used for high power applications. Features of BT Direct triggering from low power drivers and logic ICs. Oct 19,  · The BT is TRIAC with 4A maximum terminal current. The gate threshold voltage of the BT is also very less so can be driven by digital circuits. Since TRIACs are bi-directional switching devices they are commonly used for switching AC applications.


Philips BT, SERIES, E, 2 datasheet pdf


It finds applications in switching, bt136 applications, phase control, chopper designs, brilliance control in lamps, speed control in fans, bt136 applications, motors etc. The power control system is designed to bt136 applications the distribution level of AC or DC.

Such power control systems can be used to switch power to appliances manually or when temperature or light levels go beyond a preset level. As a result, the TRIAC functions as a Bidirectional switch to pass the current in both directions once the gate is triggered. The Gate can be triggered either by a positive voltage or negative voltage, bt136 applications. Triacs have inherent drawbacks like Rate effect, Backlash effect etc.

So designing of Triac based circuits need proper care. If the MT1 terminal is supplied with a sharply increasing voltage, then it results in the gate voltage break through. This triggers the Triac unnecessarily. This phenomenon is called Rate effect.

The Rate effect usually occurs due to the Transients in the mains and also due to high inrush current when heavy inductive loads switch on.

Back lash effect is the severe Control Hysteresis that develops in the lamp control or speed control circuits using a Potentiometer to control the Gate current. When the resistance of the potentio meter increases to maximum, the brightness of the lamp reduces to minimum, bt136 applications. When the pot is turned back, bt136 applications, the lamp never turns on until the resistance of the pot decreases to minimum.

The reason for this is the bt136 applications of the capacitor in the Triac. The lamp dimmer circuits use a Diac to give triggering pulse to the gate. So when the capacitor inside the Triac discharges through the Diac, the Back lash effect develops. This can be rectified by using a Resistor in series with the Diac or by adding a capacitor between the Gate and the MT1 terminal of Triac.

Radio Frequency Interference severely affects the functioning of Triacs. When the Triac switches on the load, the load current increases sharply bt136 applications zero to a high value depending bt136 applications the supply voltage and resistance of the load. This result in the generation of pulses of RFI. The strength of RFI is proportional to the wire connecting the load with the Triac, bt136 applications.

When supply is ON at positive cycle then the current flows through lamp, resistors and DIAC provided a triggering pulses are provided at pin 1 of opto coupler resulting in pin 4 and 6 start conducting gate and reaches the supply and then only lamp glows for that half cycle directly through the M2 and M1 terminal of the TRIAC.

In negative bt136 applications cycle the same thing repeats. Thus the lamp glows in both the cycles in a controlled manner depending upon the triggering pulses at the opto isolator bt136 applications seen on the graph below.

If this is given to a motor instead of lamp the power is controlled resulting in speed control. TRIACs are used in numerous applications such as light dimmers, bt136 applications, speed controls for electric fans and other electric motors and in the modern computerized control circuits of numerous household small and major appliances.

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BTE TRIAC Pinout, Equivalent, Specifications & Datasheet

 

bt136 applications

 

Triacs BT series E sensitive gate Fig Maximum on-state dissipation, Ptot, versus rms on-state current, IT(RMS), where α = conduction angle. Fig Maximum permissible non-repetitive peak on-state current ITSM, versus pulse width tp, for sinusoidal currents, tp . BT FERMENTED MALT BEVERAGES. PERMIT APPLICATION. DEPARTMENT USE ONLY. Permit Number Date of Issuance. Period Covered Legal Name (corporation, limited liability company, partnership, or individual) Federal Employer ID Number Social Security Number (required if an individual) Business Located In: (check one and indicate county) City. Village of: Town. Applications of BT Universally useful in motor control; General purpose switching; TRIAC BT TRIAC BT is also comes under TRIAC family, it has current rate of 9AMPs. The main difference between BT and BT is current rate and BT TRIACS are used for high power applications. Features of BT Direct triggering from low power drivers and logic ICs.