HT40

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Voltage - Breakover:	35 ~ 45V
Current - Breakover:	15µA
Current - Peak Output:	2A
Operating Temperature:	-40°C ~ 125°C (TJ)
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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Thyristors are solid-state devices with three terminals (anode, cathode, and gate) and are widely used for switching or amplifying signals. Thyristors are part of a large family of electronic devices referred to as three-terminal devices. The four thyristors that are commonly used in electronic circuits are DIACs, SIDACs, TRIACs, and SCRs (Silicon Controlled Rectifiers).The HT40 is an unidirectional, discrete, triac thyristor with a low on-state power rating of 40 Watts at room temperature (non-repetitive). They are used in AC applications such as AC motors,light dimmers, solid-state relays, and many other AC power applications. The HT40 is a semiconductor device, constructed using a PNPN structure, with two-P layers and one-N layer. The device is a bidirectional three terminal device consisting of anode, cathode, and gate. The gate terminal of the HT40 is used to trigger or turn off the device. In order to understand how the HT40 operates, it is important to first understand the principles of its operation. First, the HT40 has a gate-cathode terminal, which has a negative potential. When a positive gate pulse is applied, this direction of the current flow is reversed and the device enters into the conduction state. When the voltage across the gate-cathode terminal is negative, the device is turned off. This is the basic operating principle of the HT40.When used in AC applications, the HT40 performs as a switch, turning on and off the current flow between the anode and cathode terminals. During the first half cycle, when the applied voltage to the anode is positive, the current will flow from the anode to the cathode as the device is in its forward conduction mode. During the second half of the cycle, when the voltage becomes negative, the current will flow in the opposite direction. This is because the device is in its reverse conduction mode and the gate pulse has been removed. The HT40 device can also be used in DC applications. When used in DC applications, the device operates as a two-port switch, turning on and off the current flow between the anode and cathode terminals depending on the applied gate voltage. When the gate voltage is positive, the current flows from the anode to the cathode and the device is in forward conduction mode. On the other hand, when the gate voltage is negative, the current flow is reversed and the device is in reverse conduction mode. The HT40 is designed to operate at temperatures ranging from -55 to +175 degrees Celsius and its current rating is 4A. Its on-state voltage drop is 4V, its reverse current is 12~25 nA, and its dV_DSS is 75V. The operating temperature of the device is limited by temperature derating. The HT40 is manufactured using a multi-step planar process. In conclusion, the HT40 is a three-terminal thyristor that is used in AC and DC applications and can control current flow in both directions. The basic working principle of the HT40 is that it is a gate-controlled unidirectional device that turns on and off depending on the applied gate voltage. The three terminals of the device are anode, cathode, and gate. It has a low on-state power rating of 40 watts and is designed to operate at temperatures ranging from -55 to +175 degrees Celsius.

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