TR50VA004 RIB Relay Pri Sec

Review RIB R.i.b. Relay #tr50va004 120/480v Pri. 24vac Sec

The RIB TR50VA004 is a premium quality, secondary overload relay specifically designed for use in HVAC (Heating, Ventilation, and Air Conditioning) systems, refrigeration applications, and industrial processes that operate on 120/277V single-phase or 480V three-phase power supplies. This overload relay is manufactured by RIB, a trusted name in electrical components, known for their reliability and durability.

This TR50VA004 model is a 50A, 2-pole, 2-position, 3-terminal, form C, 120/480V AC relay. It is engineered with a vacuum contact technology that ensures long contact life and reliable performance. The vacuum contacts are hermetically sealed to protect them from contaminants and moisture, preventing arcing and reducing contact bounce.

The RIB TR50VA004 features a pilot-operated mechanism, meaning it operates on the coil energization of a pilot relay or a separate control circuit. This design allows for safe and efficient control of the main contact, preventing accidental contact closure when the power is off.

Additionally, this overload relay includes a time-delay function, which can be set using an adjustable time dial. The time delay provides an extra layer of protection by allowing the motor or heater to reach its normal operating temperature before the contact closes, thus preventing nuisance tripping.

The RIB TR50VA004 is designed with a robust construction, featuring a die-cast aluminum housing and a clear, tamper-evident, epoxy-coated glass window. This protective coating helps prevent dust and moisture from entering the relay, ensuring its longevity in various environmental conditions.

Furthermore, the relay comes with terminals that are suitable for both industrial and residential applications. The copper terminals are plated with silver for improved conductivity and corrosion resistance. The relay also includes a built-in test button, allowing for easy verification of proper function.

In summary, the RIB TR50VA004 is a versatile and reliable secondary overload relay suitable for a wide range of HVAC, refrigeration, and industrial applications. Its vacuum contact technology, pilot-operated mechanism, adjustable time delay, and robust construction make it an excellent choice for ensuring safe and efficient electrical system operation.

The RIB Relay TR50VA004 is a 120/480V, priority relay designed for use in industrial applications. Here are some potential pros and cons of buying this relay:

1. High Voltage: This relay can handle high voltage inputs of 120V and outputs of 480V, making it suitable for use in heavy-duty industrial environments.

2. Priority Function: The priority function allows the second contact to close only when the first contact has already closed. This feature is useful in applications where a sequence of operations is required.

3. Robust Design: The relay is designed to withstand harsh industrial conditions, including high temperatures and vibrations.

4. Versatile: The relay can be used in various applications, including HVAC systems, lighting controls, and machine automation.

5. UL and CSA Certified: The relay is certified by Underwriters Laboratories (UL) and the Canadian Standards Association (CSA), ensuring compliance with safety standards.

1. Complexity: Compared to simpler relays, the priority function adds complexity to the design and operation of the relay. This may require additional wiring and programming.

2. Cost: The relay is more expensive than basic relays due to its high voltage capacity and priority function.

3. Size: The relay is larger than standard relays, which may require additional space in the control panel or machine.

4. Installation: The installation of the relay may require specialized knowledge and skills, which may increase the cost of installation.

The RIB Relay TR50VA004 is a high-performance relay suitable for use in heavy-duty industrial applications where high voltage inputs and outputs and priority functions are required. However, its complexity, size, and cost may make it less suitable for simpler applications or budget-conscious buyers.

If you require a high voltage relay with priority function for industrial applications, then the RIB Relay TR50VA004 is a suitable option. However, if you have simpler requirements or a limited budget, then a standard relay may be a more cost-effective solution. It is recommended to consult with a qualified electrical engineer or technician to determine the best solution for your specific application.

Details:

Relay #tr50va004 is a power relay designed for electronic applications. Measuring at 4 inches in height , 5 length , and 3 width , this reliable Rib relay model is perfect for controlling power to various electronic systems with precision efficiency. With a coil voltage of 21-30v and current type ac, this relay is suitable for variety electronic devices.

specifications genpurrelays:

• brand: Rib
• mpn: Tr50va004
• current type: Ac
• type: Power Relay
• item height: 4 In
• coil voltage: 21-30 V
• item length: 5 In
• application: Electronics
• item width: 3 In
• country of origin: United States

offer genpurrelays:

• in stock #: 5
• availability: in stock
• prices: $14.99–$34.99
• item condition:
  • New
  • Seller refurbished
  • New – Open box
• sold #: 11
• options: ship-to-home
• started: march 4, 2026

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• city: wilmington,
• rating: 97.6%
• # reviews: 84

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• class: standard
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general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays