Honda Micro ISO Power Relay Assembly 39794-SDA-A03 – Omron OEM, Direct-Fit Replacement, Reliable High-Current Switching

The Honda 39794-SDA-A03 is a genuine OEM Omron micro ISO power relay assembly designed to replace the factory relay for reliable electrical operation.

This compact relay assembly is a factory-original Honda part (Omron-manufactured) intended for direct replacement in compatible Honda marine and vehicle applications. Built to the manufacturer's specifications, it restores the intended electrical performance, fits exactly where the original relay sat, and helps maintain factory-level durability and safety. The part is ideal when you need a precise fit and long-term reliability without resorting to aftermarket substitutes.

What does this relay assembly do for my electrical system?

This power (micro ISO) relay acts as a controlled switch within the vehicle or marine electrical circuit, allowing higher-current loads to be managed safely by a low-current control signal. It ensures consistent power delivery to components that require intermittent or sustained current while protecting the control side from heavy load. Using a genuine OEM relay preserves original wiring behavior and electrical timing.

• Switches high-current circuits using a low-current control input
• Designed to match Honda factory wiring and connectors
• Reduces risk of electrical noise or improper operation from mismatched relays

How do I know this is the correct replacement part?

The 39794-SDA-A03 is an exact-fit Honda OEM relay assembly, labeled and manufactured to the same specifications as the factory unit. Matching the part number and connector style ensures plug-and-play replacement with no modification required. If your service manual or parts diagram lists this number, this relay is the correct factory replacement.

• OEM part number: 39794-SDA-A03 for direct swap
• Omron-built, matching Honda factory tolerance and dimensions
• Plug-compatible with original harness and mounting points

Why choose a genuine Honda (Omron) relay over aftermarket options?

A genuine Honda relay guarantees the original engineering, material quality, and connector fit intended by the manufacturer—qualities that reduce rework and avoid electrical mismatch. Aftermarket relays can vary in size, pin configuration, or contact ratings, which may create fitment issues or unpredictable performance. Choosing OEM minimizes troubleshooting and preserves factory specifications for safety and reliability.

• Factory-tested performance and intermittent duty ratings
• Exact connector and housing dimensions to prevent fitment problems
• Maintains original electrical characteristics and service life expectations

How do I install the relay assembly safely?

Installation is typically straightforward: disconnect battery power, remove the old relay from its socket or bracket, and insert the new OEM assembly in the same orientation. Verify secure seating and check for any corroded terminals or damaged harnesses before restoring power. If uncertain, consult a mechanic or follow the factory service manual steps for your specific model.

• Always disconnect the battery before touching electrical connectors
• Inspect surrounding wiring and clean terminal contacts if needed
• Ensure the relay is mounted and oriented as the original unit

Who is this for: This genuine Honda 39794-SDA-A03 relay assembly is best for owners, technicians, and marine service professionals who require a direct OEM replacement to maintain factory electrical performance. It's appropriate for anyone needing a plug-and-play relay with Honda/Omron quality—especially when avoiding aftermarket variability is important for fit, function, and long-term reliability.