Multiquip 43990 Relay 12V 20A 4-Pin Micro

The Multiquip 43990 is a genuine OEM Relay 12V 20A 4-Pin Micro designed for Whiteman ride-on power trowel models HTX6H, STX6H, STXDF, and HTXG6DF. As a direct Multiquip OEM component, part 43990 is manufactured to the exact electrical specifications required by these hydrostatic trowel platforms. Verified fitment across the HTX and STX series means you can install with confidence and get your machine back in operation without guesswork.

Key Features

• OEM-Matched Electrical Specification — Rated at 12V and 20A, this relay meets the precise switching requirements of the HTX and STX trowel control circuits, ensuring correct load handling without risk of under- or over-rating.
• 4-Pin Micro Form Factor — The compact 4-pin micro configuration connects directly to the OEM harness connector on compatible trowel models, requiring no terminal modifications or adapter wiring.
• Confirmed Fitment for HTX and STX Series — Verified for HTX6H, STX6H, STXDF, and HTXG6DF Whiteman hydrostatic and dual-fuel ride-on power trowels.
• Protects Downstream Electrical Components — A correctly functioning relay switches high-current circuits safely using a low-current control signal, protecting sensitive control components from overload and heat damage.
• Electrical Safety Compliance — Using the correct OEM-rated relay in control and ignition circuits helps maintain proper circuit protection and reduces the risk of electrical fault conditions on the machine.

A relay is an electrically operated switch that allows a low-current control signal — such as one from a switch or control module — to safely open or close a high-current circuit. On ride-on power trowels like the HTX6H and STX6H, relays are used throughout the electrical system to control functions such as starting, ignition, and auxiliary loads. When a relay fails, the circuit it controls will not function, which can prevent the machine from starting or cause intermittent electrical faults. Replacing a failed relay with the correct OEM part restores proper circuit switching and keeps the electrical system operating as designed.

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.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.