Maytronics Dolphin Supreme M5 Amphenol plug - 5000009

Maytronics Dolphin Supreme M5 Amphenol plug

This is the genuine Maytronics Amphenol plug (part 5000009) — the electrical connector fitted to the end of the floating cable on the Dolphin Supreme M5 and a wide range of other Dolphin robotic pool cleaners. It is the interface between the floating cable and the power supply unit, carrying low-voltage DC power from the PSU down to the cleaner in the pool. Without a sound connection at this point, the robot will not run.

What this Amphenol plug does in the Dolphin

The plug seats into the corresponding socket on the Dolphin PSU and locks with a quarter-turn clockwise rotation, forming a weatherproof electrical connection. It accommodates up to four pins; the active pin count depends on the specific cable and model — two-pin cables use the same plug body as four-pin variants. The Amphenol format is a Maytronics-wide standard, which is why this single part number covers decades of Dolphin models.

Which Dolphin models it fits

Confirmed compatible models include the Dolphin Supreme M3, Supreme M4, Supreme M5, Nautilus, Nautilus Plus, Triton, Triton Plus, M200, M400, Discovery, Saturn, Edge, DX3, DX4, Apollo, S50, S200, S300, S300i, and many additional Dolphin ranges spanning the E, S, Carrera, Blue Maxi, Avalon, Seamaster, SX, and Formula series. Cross-reference your model against the confirmed compatibility list before ordering — if your cleaner uses a floating cable with an Amphenol-style connector at the PSU end, this is the correct replacement plug.

Signs it needs replacing

The cleaner fails to start or cuts out intermittently despite a confirmed working PSU. Visible damage — cracked housing, bent or corroded pins, broken retaining clips — at the cable-end connector is the most common failure point. A loose or wobbly fit in the PSU socket that does not lock securely with a quarter-turn is another clear indicator. Physical damage from being dropped on pool surrounds or caught underfoot accelerates failure on this part.

How to install it

Strip and re-terminate the floating cable into the new plug body using a 1.5 mm × 50 mm hex key (Allen wrench) to secure the pin-retention screws. Insert the plug into the PSU socket so that the locating protrusion on the plug aligns with the notch on the socket, then rotate clockwise to lock. The process takes approximately 15–20 minutes with basic hand tools; consult Maytronics wiring guidance for your specific cable pin-out before cutting the old connector free.

Why genuine Maytronics matters

Aftermarket copies of this plug are widely available and visually identical, but pin tolerances and housing-material quality vary significantly. A substandard connector introduces resistance at the power interface, causes intermittent faults that are difficult to diagnose, and in worst cases damages the PSU socket. The genuine Maytronics part carries the correct pin metallurgy and housing tolerances for a lasting, watertight lock.