3 Pole Double Throw Knife Switch with LED Indicator

Buy a low price 3 pole double throw knife switch online, with a resin base, transparent LED indicator and optional current 32A/63A/100A/160A/225A. Reliable manual changeover switch can effectively isolate the power supply when disconnecting the circuit.

Specifications

Dimensions (Unit: mm)

Wiring Diagram

Tips: What is a double throw knife switch?

The double-throw knife switch is a type of electrical switch used to control the flow of electricity in a circuit. It consists of a metal lever, often shaped like a knife, that can be manually moved to make or break electrical connections. The "double throw" aspect refers to the switch's ability to control two separate circuits, providing a choice between two different paths for the electrical current.

In a double-throw knife switch, there are typically three terminals: one common terminal and two other terminals corresponding to the two possible positions of the switch. When the switch is in one position, the common terminal is connected to one of the other terminals, completing one circuit. When the switch is flipped to the other position, the common terminal is connected to the second terminal, establishing a different circuit.

These switches were commonly used in early electrical systems, and while they have been largely replaced by more modern switches in many applications, they are still employed in certain niche situations where their specific features are advantageous. The distinctive design of the switch, resembling a knife, contributes to its name.