RESIDEO R845A Control Circuit Switching Relay 1030 120V 2-WIRE 24V

( Brand: Resideo ), ( Manufacturer Part Number: R845A ), ( Model: R845A 1030 120V 2-WIRE 24V ), ( Manufacturer Warranty: No ), ( Serial Number: 2604, 2550 ), ( Type: Switching Relay )

Review RESIDEO New 120v 2-wire 24v Control Circuit Switching Relay

The Resideo R845A 1030 is a versatile 2-wire 24V control circuit switching relay designed for use in various residential and light commercial applications. This reliable device is engineered to provide efficient and effective switching functionality between 120V AC loads and 24V DC control circuits.

The R845A 1030 is a normally open (NO) relay, meaning that it does not conduct current when the control circuit is at rest. When the control circuit is activated, the relay closes, allowing the 120V AC current to flow through the contacts and engage the connected load. This functionality is particularly useful in applications requiring automated control of lighting, HVAC systems, and appliances.

The relay features a compact size, with dimensions of 1.6 x 2.3 x 1.1 inches, making it an ideal choice for space-constrained installations. It is designed for easy mounting with two mounting holes provided on either side of the unit.

The R845A 1030 is rated for a maximum load capacity of 10 amps at 120V AC or 30 watts at 24V DC. It is suitable for use with inductive and resistive loads, but it is not recommended for use with capacitive loads. The relay's contacts are rated for 10,000 cycles, ensuring long-lasting performance.

The relay is UL listed, ensuring compliance with the latest safety standards. It also features a built-in coil overvoltage protection circuit, which helps prevent damage to the relay in case of voltage spikes or surges.

The R845A 1030 comes with a clear and concise label that indicates the relay's function, terminals, and polarity. The terminals are numbered, making installation and wiring straightforward.

In summary, the Resideo R845A 1030 is a powerful and versatile 2-wire 24V control circuit switching relay, suitable for use in various residential and light commercial applications. Its compact size, easy mounting, and reliable performance make it an excellent choice for any project requiring efficient and effective switching functionality between 120V AC loads and 24V DC control circuits.

Pros and Cons of Buying Resideo R845A 1030 120V 2-Wire 24V Control Circuit Switching Relay

The Resideo R845A 1030 is a 2-wire, 120V AC control circuit switching relay with a 24V DC coil. It is designed for use in HVAC and other automation systems.

a. Versatile Application: This relay can be used in various applications due to its compatibility with both 120V AC and 24V DC power sources.

b. Compact Size: Its compact size makes it suitable for installation in confined spaces.

c. Easy Installation: The relay has a simple wiring scheme, making it easy to install and configure.

d. Durable Construction: The relay features a rugged and durable design, ensuring long-lasting performance in harsh environments.

a. Limited Current Capacity: The relay has a maximum current capacity of 10A, which may not be sufficient for high-power applications.

b. Single Pole, Double Throw (SPDT) Relay: This relay is an SPDT type, which may not be suitable for certain applications requiring multiple contacts or more complex switching arrangements.

c. Manual Reset: The relay does not have an automatic reset feature, requiring manual intervention to restore the normal state after the coil is de-energized.

The Resideo R845A 1030 is a reliable and versatile control circuit switching relay suitable for various applications in HVAC and automation systems. Its compact size, easy installation, and compatibility with both 120V AC and 24V DC power sources are significant advantages. However, its limited current capacity and manual reset feature may be drawbacks for some users.

Based on the pros and cons discussed above, the Resideo R845A 1030 is a recommended option for users looking for a reliable and versatile control circuit switching relay for their HVAC or automation projects, as long as the limited current capacity and manual reset feature do not pose significant issues. If higher current capacity or more complex switching arrangements are required, users may consider other relay options with larger current handling capacity or multiple contacts.

Details:

Cosmetic condition. This device is brand new, factory-sealed, and still in the manufacturers original packaging. Functionality condition. FREE Shipping.

This device is brand new and sealed in the manufacturers original packaging, it should perform according to specifications. Please view our close up photos, as these are taken of the actual item being offered for sale. Type Switching Relay. To coordinate pickup.

New Resideo R845A 1030 120V 2-Wire 24v Control Circuit Switching Relay R845A: Items included in this sale: 2x Original Box All originally boxed contents are. This listing is for one of them. Pay More Flat bush.

part #: r845a prices

• $35.98-$68.94

specifications hoimprovo:

• brand: Resideo
• mpn: R845a
• model: R845a 1030 120v 2-wire 24v
• manufacturer warranty: No
• serial number: 2604, 2550
• type: Switching Relay

general hoimprovo:

• Home Garden > Home Improvement > Other Home Improvement
• condition: New

payments hoimprovo:

• credit card: Visa
• other
• wallet: Google-pay

offer hoimprovo:

• options: Ship-to-home
• quantity: 2
• availability: In Stock
• started: May 19, 2026
• sold: 0

seller hoimprovo:

• rating: 99.2%
• city: Brooklyn, New York
• # reviews: 5006

shipping hoimprovo:

• type: Fixed
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• transit: 3-8 Days
• cost: $0.00

returns hoimprovo:

• time: 30 Days
• paid by: Seller
• method: Money back
• policy: Returns Accepted

Resideo R845A Is Similar To:

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