Bomag 05766403 Diode Module

The Bomag 05766403 Diode Module is a genuine OEM electrical component designed for a wide range of Bomag tandem rollers, single drum rollers, pneumatic tyred rollers, refuse/landfill compactors, soil compactors, pavers, trench compactors, and recycler/stabilizers. Sourced directly from Bomag, this diode module meets the exact electrical specifications of the original part, ensuring correct current flow and circuit protection across every compatible machine. This component fits an extensive lineup including BW-series tandem and single drum rollers, BC-series refuse/landfill and soil compactors, BF 300 P and BF 300 C pavers, the BMP 851 trench compactor, and MPH-series recycler/stabilizers, among others. When you order by part number 05766403, you get the right part with no guesswork.

Key Features

• Genuine OEM Electrical Specification — manufactured to Bomag's original circuit tolerances, ensuring correct voltage regulation and diode rectification performance for the specific electrical systems found across this broad equipment range
• Direct-Swap Replacement — this diode module is designed to match the original mounting configuration and connector interface, slotting in as a like-for-like replacement without rework
• Broad Verified Fitment — confirmed for BW-series tandem rollers (including BW 100 AD-4, BW 120 AD-4, BW 174 AD, BW 202 AD-4, BW 203 AD-4), single drum rollers (including BW 177 D-3, BW 213 D-3, BW 225 D-3), BC-series refuse/landfill compactors (including BC 571 RB, BC 671 RB, BC 772 RB, BC 972 RB, BC 1172 RB), BF 300 P and BF 300 C pavers, BMP 851 trench compactor, pneumatic tyred rollers, and MPH/RS-series recycler/stabilizers
• Protects Charging Circuit Integrity — a functioning diode module prevents reverse current flow that can damage the alternator, battery, and connected control systems; a failed module can cause charging faults, electrical misbehavior, or no-start conditions
• Electrical Safety Assurance — as a critical component in the machine's charging and rectification circuit, using a correctly rated OEM diode module guards against overvoltage conditions that can damage sensitive onboard electronics

The diode module serves as a rectifier and protective gate within the machine's electrical charging circuit. It controls the direction of current flow from the alternator, converting alternating current into usable direct current while preventing backfeed that would otherwise discharge the battery or damage the alternator windings. When a diode module fails — through thermal stress, vibration fatigue, or age — the machine may experience erratic charging, battery drain, warning light faults, or a complete loss of electrical output, bringing operations to a halt until the component is replaced.

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.