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Littelfuse ARP43S Alternating Relay

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1  Review Add Your Review
Special Price $120.91 Regular Price $139.05
In stock
SKU
ARP43S
The Littelfuse ARP43S is an alternating relay that is used to control the running time of two motors in HVAC systems. It has a selector switch that enables the user to switch between two loads or focus on one, making it more effective in its function. This relay works at 120 VAC and has a load capacity of 10 A, it is ideal for use in applications that require the control of compressor and pump. Some of the advantages include LED lights that show the status of the load, protection from accidental triggering, and the small size of the part that makes it easy to install.
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HVAC Controls & Electrical, Relays, Alternating Relays
Manufacturer:
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Specifications

  • Type: Alternating Relay
    Manufacturer Name: Littelfuse
    Product Number: ARP43S
    OEM Part Number: ARP43S
    Product Description: Alternating Relay
    Weight:0.39lbs/176.9g

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    Product Questions (2)
    Customer Questions
    What maintenance is required for the Littelfuse ARP43S Alternating Relay?

    Inspect wiring connections regularly to ensure they remain tight and free from corrosion or heat damage. Keep the relay clean and dry to prevent dust or moisture interference. Periodically test switching operation to confirm proper alternating function and reliability in control systems.

    What are common issues with the Littelfuse ARP43S Alternating Relay?

    • Failure to alternate loads correctly between outputs.
    • Intermittent switching due to loose or damaged wiring connections.
    • Relay coil malfunction causing no response or erratic operation.
    • Overheating or contact wear leading to inconsistent performance.

    Installation Steps

    Step 1: Turn off power to the control circuit and check zero voltage before handling wiring.

    Step 2: Remove existing old relay and document terminal connections clearly for reference.

    Step 3: Mount new relay securely on din rail or panel surface.

    Step 4: Reconnect control and load wiring to matching terminals, ensuring tight, correct placement.

    Step 5: Restore power and test alternating operation between connected loads, confirming proper switching and no abnormal heating or noise.