RY212012

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Power Relays, Over 2 Amps: RY212012 Application Field and Working Principle

RY212012 is a power relay series designed for applications with power requirements over 2 Amps. It is a versatile, compactly-sized cylindrical relay suitable for a wide range of uses in industrial and commercial applications including power and load switching, surge suppression, electromagnetic interference filtering, motor control, and overcurrent/short-circuit protection.

Features and Benefits

RY212012 offers a cost-effective solution for applications which require a compact, reliable and flexible relay. Its features include:

• High overload capacity
• Low contact resistance
• High electrical noise immunity
• UL94V-0 rated housing and spade sockets
• Electric strength up to 2 kVac 50/60 Hz
• Operating temperatures from -25°C to +85°C
• Over-travel limit switch

Additional benefits include resistance to vibration and shock, a high grade of conformal coating for improved reliability, and a wide operating voltage range.

Design

RY212012 is a single-pole double throw (SPDT) Class B relay, with a short circuit protective device. It has two contacts on the same side, each rated for up to 5 Amps at 125 Volts. The relay is designed to operate with either AC or DC voltage, and the coil voltage must be equal to or lower than the rated AC/DC voltage of the relay.

The relay has a PCB panel mounted module with a black plastic housing and a silver or a gold spade socket for connecting to an external circuit. The design also features a vibration-proof UL 94V-0 rated housing and higher than the industry standard electric strength of 2kVac 50/60 Hz.

Working Principle

RY212012 uses an electromagnetic-actuating principle to switch the internal contacts. When voltage is applied to the coil, a magnetic field is generated which pulls the internal contacts open or closed, depending on the type of the relay. The design includes a limit switch for safety and a protective device for surge suppression.

The relay is designed to be operated in parallel with other relays and so it is not necessary to disconnect the circuit when changing the contacts of the relay. This saves time and simplifies the design of the system, as the relay is connected to other components by short connecting wires.

When the voltage in the circuit is exceeded, the internal contact of the relay trips and protect the circuit from overloads, and when the voltage returns to its normal level, the contacts reset itself.

Conclusion

The RY212012 power relay series provides a reliable and cost-effective solution for applications where a compact, flexible and reliable relay is required. It is designed to operate with either AC or DC voltage, and it has a high overload capacity and low contact resistance. It features a vibration-proof housing, a high grade of conformal coating, an UL 94V-0 rated spade socket, and a wide operating voltage range. It has an internal limit switch and a protective device for surge suppression. This makes it ideal for motor control, load switching, surge suppression, electromagnetic interference filtering and overcurrent/short-circuit protection.

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