1521-3/4ST

Terminal Blocks – Barrier Blocks

1521-3/4ST application field and working principle

Terminal blocks (barrier blocks) offer a cost-effective way to connect the board-to-board wiring of electrical and electronic systems, providing a secure and insulated connection. They provide a safe, convenient method for making and breaking electrical connections, and can be used in refrigeration, fittings, heating, air-conditioning, meters and other power battery systems. They are also known as terminal strips or barrier strips.

The 1521-3/4ST is a low-cost, durable terminal block designed to provide electrical connections between components mounted on printed circuit boards. This type of terminal block is suitable for use in applications with low current (half-amp), low voltage (24 volts AC/DC), and can handle high inrush currents. It is also designed to withstand high temperatures, making it ideal for use in extreme conditions.

The 1521-3/4ST application field includes electric fans, air conditioners, refrigerators, meters, and other electronic devices. To ensure a safe and secure connection, each terminal block is equipped with two slots, typically at the top and bottom of the block. The slots are designed to accept standard or custom-sized wire connectors. This allows for the easy insertion and removal of electrical wires, reducing the risk of short circuits and sparking.

In terms of working principle, 1521-3/4ST terminal blocks feature a common type of terminal strip that has three clamps. Each clamp contains an internal spring that provides constant pressure when inserted or removed. When the terminal block is connected, the spring applies a force that allows the wire to stay firmly connected. This ensures the continuous connection of components, and prevents against shock, sparks, and fire.

In order to protect the terminal block from dust, corrosion, temperature, and other external elements, the 1521-3/4ST is enclosed in a plastic housing. The housing consists of two halves, one of which is fitted with a cover for easy visual inspection. This makes it easy to maintain the connection and keep the terminal block clean.

The 1521-3/4ST is a robust terminal block that provides efficient and reliable electrical connections. It is an excellent option for applications that require low current, low voltage, and high inrush currents. It is extremely safe and easy to use, and is ideal for use in industrial, automotive, and other applications requiring extreme conditions.