Once this button is pressed the circuit loop will break and current flow though the device will become zero. And to drop the current through the loop to zero we will press button B2. Once the current is cutoff the charge stored in the device will dissipate and it will recover to its initial forward blocking state.
Now for recovering the SCR to its high resistance state the current flow though the device must be brought to zero for fraction of second. This is due to the characteristics of the device as a SCR. Since the power supply is DC the SCR which was triggered ON will stay in conduction mode even after the gate voltage is removed after the device starts conducting. So when B1 is pressed at a time T1 as shown in graph, SCR starts conducting and a voltage appears across the load as shown in the graph. This state continuous until a voltage pulse is give to the gate of the device and this is possible when button B1 is pressed. Vg =0V), the total drop appears across the device and we have Vload = 0V as shown in graph. So under no trigger to the gate of the SCR (i.e. Also in circuit, device Anode is connected to load and cathode is connected to second end of power source.Īt initial state button B1 will be not pressed and in gate voltage absence SCR will be in non-conductive state. In addition Button 2 will be close by default and will break the circuit once it is pressed. Here V1 is the DC voltage source, a resistor type load is connected in series with SCR and Vg is the trigger voltage at the gate of the device. The device is also used in low voltage AC rectifier and RMS voltage controller applications.įirst understanding the working let us consider a simple application circuit for the device as shown in the circuit diagram below. SN102, TIC206D, BT169, TYN604, 2N1596, 2N1595ĢP4M basically used in applications where gate currents are limited, such as capacitive discharge ignitions, motor control in kitchen aids and over voltage protection in low power supplies. Storage temperature range: -55✬ to +150✬.Operating junction temperature range: -40✬ to +125✬.Less holding current distribution provides free application design.Easy installation by its miniature size and thin electrode leads.Low voltage trigger pulse is given to this pin to turning ON the SCRĢP4M Features and Electrical characteristics Pin ConfigurationĢP4M is a three pin device as shown in above 2P4M pin diagram and we will describe each of these pins below. The device is designed to have highly sensitive trigger levels and is suitable for applications where available gate currents are limited. 2P4M is a solid state semiconductor device called Thyristor or SCR (Silicon Controlled Rectifier).
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