
( Brand: Johnson Controls ), ( Manufacturer Part Number: RR20NN ), ( Unit Type: Unit ), ( Color: White ), ( Programmability: Programmable )
The Johnson RR20NN Pilot Relay is a 20A, Single-Pole, Double-Throw (SPDT) electromechanical component designed for various automotive and industrial applications. This pilot relay is manufactured by Johnson Electric, a leading global supplier of advanced electric motors and power components.
The RR20NN pilot relay features a compact and robust design, with dimensions of 2.6 inches (66.0mm) in length, 1.4 inches (35.6mm) in width, and 0.9 inches (23.0mm) in height. It is housed in a die-cast aluminum case with a black powder coating finish, ensuring durability in harsh operating environments.
This pilot relay is rated for a maximum current of 20 Amperes at a contact voltage of 120 Volts AC or 240 Volts AC. It operates on an AC coil voltage of 12 Volts, with a coil resistance of 1.9 Ohms and an inductance of 3.2 millihenries. The contacts are rated for a contact resistance of 0.15 Ohms maximum at 25 C, and the relay has a contact bounce time of less than 20 milliseconds.
The RR20NN pilot relay comes with two normally open (NO) contacts and one normally closed (NC) contact. The SPDT switching mechanism allows for selective routing of electrical current between two contacts while keeping the third contact open. The relay has a contacts ratings of 105 C maximum operating temperature and 1,000,000 cycles minimum life expectancy.
The Johnson RR20NN Pilot Relay is easy to install, with a screw terminal block for secure and efficient wiring connections. It also features a built-in pilot light, which illuminates when the relay is energized, providing visual confirmation of the relay's status. The pilot light is adjustable, allowing for easy customization to specific application requirements.
The RR20NN pilot relay is suitable for use in various applications, including automotive ignition systems, HVAC systems, and industrial control systems. Its reliable and robust design, combined with its compact size and easy installation, make it an ideal choice for applications where high current switching and precise control are essential.
The Johnson RR20NN pilot relay is a 20A, SPDT (Single Pole Double Throw) component used in various electrical applications, particularly in gas appliances. Here are some pros and cons of buying this relay.
Pros:1. Reliability: Johnson is a well-known brand in the electrical industry, and their products are known for their reliability and durability.
2. Versatility: The SPDT configuration makes this relay suitable for a wide range of applications where two separate circuits need to be controlled by a single input.
3. Easy Installation: This relay is relatively easy to install, as it comes with clear labeling and a user-friendly design.
4. Safety: The pilot relay is an essential safety component in gas appliances, as it ensures that the main gas valve only opens when the pilot flame is present.
5. Cost-effective: Compared to other brands or more complex solutions, the Johnson RR20NN is a cost-effective option for those requiring a basic pilot relay.
Cons:1. Limited Current Capacity: This relay is only rated for a maximum current of 20A, which may not be sufficient for all applications.
2. Manual Reset: Some users have reported that the relay requires a manual reset after a power outage or if the pilot flame goes out.
3. Not Suitable for High Voltage: The Johnson RR20NN is only suitable for low voltage applications.
4. Lack of Protection: There is no overcurrent or short-circuit protection built into this relay.
Conclusion:The Johnson RR20NN pilot relay is a reliable and cost-effective option for those requiring a basic SPDT relay for low voltage applications, particularly in gas appliances. However, it may not be suitable for high current or high voltage applications, and users should be aware of the need for a manual reset after power outages or pilot flame issues.
Recommendation:If you require a more robust or versatile pilot relay, consider investing in a higher-end model with built-in protection features and automatic reset capabilities. However, for basic applications where cost and ease of installation are key considerations, the Johnson RR20NN is an excellent choice.
Johnson Controls RR20NN Pilot Relay 20A SPDT.