1N8181

Series:	*
Part Status:	Active
RoHS Status:	RoHS non-compliant

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1N8181 is a voltage-sensitive thyristor device (VSTD) which belongs to voltage-sensitive transistor diode (TVS-Diodes) series of products. This device is designed to limit transient voltages in power supply networks and protect related devices from power swings and transient voltage surges. It is widely used in applications such as onboard power supply and communication equipment systems.1N8181 is a unidirectional voltage sensitive thyristor (VSTD), also called as thyristor clamp, which can protect sensitive electrical and electronic devices from power disturbances and surge events. It is very sensitive to surge voltages and can switch to a very low resistance state and thus clamp the lagging side of a given voltage-sensitive circuit. It has two leads: one is dummy lead and the other is the "cathode" (or the positive) lead. When connected to a power supply, the device will respond to a rise in the voltage across it by passing current and providing a path for the current to bypass the device, effectively limiting the amount of surge voltage that can pass through.The working principle of 1N8181 is relatively straightforward. When the voltage across the device rises to a certain level, the thyristor will switch to the conducting state, and thus it would form a conducting path from the negative supply of the circuit to the connected device, thereby limiting the amount of voltage that will appear across the device. The maximum amount of surge voltage that will be clamped is determined by the specific rating of the device, which depends on the manufacturer.1N8181 devices are typically used in power supply network applications to protect the various components from transient voltage surges. For example, they can be connected in series with circuits to form a clamping network, which can be used to clamp any transient voltage that is higher than the maximum allowable for the device. Additionally, 1N8181 devices can also be used to protect circuit boards, such as those that are used in laptops, computers and other electronic equipment, from power disturbances.In summary, 1N8181 is a voltage-sensitive thyristor device (VSTD) which belongs to the voltage-sensitive transistor diode (TVS-Diodes) series of products. It is designed to limit transient voltages in power supply networks and protect related devices from power swings and transient voltage surges. Its working principle is relatively straightforward, and it is typically used in power supply network applications to protect the various components from transient voltage surges.

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