Multiquip LBD502 24VDC Relay

The Multiquip LBD502 is a genuine OEM 24VDC Relay designed for the DCA400SSI4F and DCA600SSV4F3 series super-silent diesel generators. As a factory-authorized replacement component, it meets the same electrical specifications as the original part installed at the time of manufacture. This relay is confirmed compatible with a wide range of DCA400 and DCA600 series configurations, including Tier 4 Final variants such as the DCA400SSI4F3, DCA400SSI4F3B, DCA400SSI4F3PB, DCA600SSV4F3, DCA600SSV4F3B, and DCA600SSV4F3PB. Sourcing the correct relay by part number LBD502 ensures electrical continuity and protects downstream generator control circuits.

Key Features

• Correct 24VDC Coil Rating — Matched to the 24-volt DC control architecture used in DCA400 and DCA600 series generators, ensuring proper switching behavior without over- or under-voltage stress on the coil.
• Genuine OEM Component — Sourced directly from Multiquip, this relay carries the same part number and specification as the unit installed during original assembly.
• Broad DCA Series Compatibility — Fits DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3B, DCA400SSI4F3PB, DCA600SSV4F3, DCA600SSV4F3B, DCA600SSV4F3PB, and 60Hz variants across both families.
• Direct Drop-In Replacement — Connects to the existing wiring harness and mounting position without modification, restoring the generator control panel to its original operating condition.
• Protects Generator Control Circuits — A relay in proper working order isolates high-current switching from sensitive control electronics; a failed relay can cause control faults, failed starts, or unintended shutdowns on a working generator.
• Electrical Safety Compliance — Using the correct OEM-rated relay in generator control panels is critical to maintaining proper overcurrent isolation and preventing damage to connected control board components.

A relay is an electrically operated switch that uses a low-power control signal — in this case, 24 volts DC — to open or close a higher-current circuit within the generator's control system. In DCA-series super-silent generators, relays like the part are used to control functions such as engine start sequences, load transfer switching, and fault protection circuits. When a relay fails, it can result in a generator that will not start, fails to transfer load correctly, or triggers persistent fault codes that prevent normal operation.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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