Circuit Schematic Simple Electronic Fuse using SCR

Sensor. - This is electronic circuit schematic of Simple Electronic Fuse using SCR like in Figure 1 below. In this circuit schematic the basic component used is SCR. 

In here we will give you global description about circuit schematic of Simple Electronic Fuse using SCR and then we will give you link to continue your reading from original source as external website.

Circuit Schematic

Figure 1. Circuit Schematic Simple Electronic Fuse using SCR (Source: Circuitstoday)

Component Part

• SCR TYN612
• Push button
• Resistor
• Transistor

Description

Circuit schematic like in Figure 1 above is Circuit Schematic Simple Electronic Fuse using SCR. Circuitstoday site describe that this is perhaps one of the simplest electronic fuse circuit one can make. The circuit uses only one transistor, one SCR, one push button switch and two resistors.

The working of the circuit is very simple. Initially the load current flows through SCR and resistor R1.The value of R1 is so selected that, the maximum load current multiplied by the resistance of R1 is equal to 0.7 volts. When the load current exceeds the maximum value the voltage drop across R1 becomes more than 0.7V and switches transistor Q1 ON. Now the transistor completely bye passes the load current and the current through triac falls below the holding current. This makes the triac OFF. When SCR is OFF there will not be any current flow through R1 and so the voltage across it falls to 0.This makes the transistor OFF, completely isolating the load circuit.The fuse can be resetted by pressing S1.When S1 is pressed the SCR is again triggered and remains latched to conduct the load current.

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