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ONAN 307B642 Relay

307b642 Onan Relay

( Brand: Onan ), ( Manufacturer Part Number: 307B642 )

Review ONAN Relay

The ONAN 307B642 is a versatile and reliable AC contactor relay designed for various applications, particularly in the marine and RV industries. This heavy-duty component is engineered to handle heavy loads and provide reliable operation in demanding environments.

The 307B642 is a single-pole, double-throw (SPDT) relay, meaning it can switch one circuit on or off based on the input signal. It is rated for a maximum current of 60 Amperes at 125 Volts AC, making it suitable for handling significant electrical loads. The relay features gold-plated contacts to ensure a good connection and minimize resistance, resulting in efficient power transfer and extended contact life.

The ONAN 307B642 relay comes with built-in overload protection, which helps prevent damage to the electrical system due to overcurrent conditions. The overload protection is adjustable, allowing users to customize the trip point to meet their specific requirements. This feature is particularly beneficial in applications where electrical loads may vary or experience occasional surges.

The relay's housing is made of die-cast aluminum, providing excellent heat dissipation and durability. It is also designed to be water and dust resistant, making it an ideal choice for marine and RV applications where exposure to the elements is common. The ONAN 307B642 is also UL listed, ensuring it meets the rigorous safety standards set by Underwriters Laboratories.

Installation of the ONAN 307B642 relay is straightforward. It features a screw terminal block that can accommodate various wire sizes, making it easy to connect to the system. The relay also comes with a mounting plate, which can be attached to a DIN rail or other mounting surfaces using screws, allowing for quick and secure installation.

In summary, the ONAN 307B642 is a robust and reliable AC contactor relay that can handle heavy loads while providing adjustable overload protection. Its gold-plated contacts, water and dust resistance, and UL listing make it a top choice for marine and RV applications. Its easy-to-install design, with a screw terminal block and mounting plate, adds to its versatility and convenience.

The ONAN 307B642 relay is a component commonly used in RV air conditioning systems. Here are some pros and cons of buying this particular relay: Pros:

1. Reliability: ONAN is a well-known brand in the RV industry, and their products are known for their durability and reliability.

2. Easy to Install: The ONAN 307B642 relay is designed to be a direct replacement for the original relay in many RV air conditioning systems, making installation relatively straightforward.

3. Compatibility: This relay is compatible with a wide range of RV air conditioning units, making it a versatile option for RV owners.

4. Availability: The ONAN 307B642 relay is readily available from various retailers, both online and in physical stores.

Cons:

1. Cost: Compared to some other relays on the market, the ONAN 307B642 can be more expensive.

2. Size: The relay is slightly larger than some other options, which may require additional clearance during installation.

3. Complexity: While the installation process is relatively straightforward, some users may find the wiring and connections to be more complex than they anticipated.

Conclusion:

The ONAN 307B642 relay is a reliable and compatible option for RV owners looking to replace their air conditioning system's relay. However, its higher cost and size may be a consideration for some users. Ultimately, the decision to purchase this relay will depend on the individual's specific needs and budget.

Recommendation:

If you are looking for a reliable and versatile relay for your RV air conditioning system and are willing to pay a slightly higher price, the ONAN 307B642 relay is a solid choice. However, if cost is a major concern, you may want to consider other options that are more budget-friendly. It is always a good idea to consult with a qualified technician or the manufacturer's support team to ensure compatibility and proper installation.

Details:

Relay has been bench tested and ready to go back work.

part #: 307b642 price

  • $75.00

specifications generatormac:

  • brand: Onan
  • mpn: 307b642

general generatormac:

  • Business Industrial > Light Equipment Tools > Generator Parts Accessories
  • condition: Used

returns generatormac:

  • policy: No Returns

seller generatormac:

  • rating: 100.0%
  • city: Chadds Ford, Pennsylvania
  • # reviews: 705

shipping generatormac:

  • service: USPS Ground Advantage
  • type: Fixed
  • class: Standard
  • cost: $5.00
  • carrier: USPS
  • transit: 4-9 Days

offer generatormac:

  • started: December 18, 2025
  • quantity: 1
  • options: Ship-to-home
  • best offers: True
  • availability: In Stock
  • sold: 0

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category: business & industrial > generator parts accessories, sku: 8924182898515762,

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1 offer $75.00 USD
  • Offer #1: $75.00 price + $5.00 shipping estimate = $80.00* total. Relay has been bench tested and ready to go back to work!.+$5.00 shipping

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