The Bomag 05755921 Blocking Diode is a genuine OEM electrical component designed for the BW 213 D single drum roller and BW 6 and BW 6 S walk-behind rollers. As a direct OEM replacement, this blocking diode is manufactured to the same specification as the original part, ensuring correct electrical behavior within the charging and control circuits it serves. Sourced directly through authorized Bomag supply channels, part number 05755921 delivers the exact fit and function your machine requires.
Key Features
- Genuine OEM Electrical Specification — manufactured to the original forward-voltage and reverse-blocking ratings, ensuring correct current behavior in the machine's charging or control circuit
- Direct Drop-In Replacement — matches the original connector configuration and mounting footprint, so this blocking diode installs directly without adaptation
- Confirmed Fitment — verified for the BW 213 D single drum roller and BW 6 and BW 6 S walk-behind rollers
- Protects Sensitive Electrical Circuits — a correctly functioning blocking diode prevents reverse current flow that can damage alternators, batteries, and downstream control components
- Electrical Safety — proper diode function is critical to protecting the machine's electrical system from unintended back-feed, helping maintain safe and predictable operation
A blocking diode is a one-way electrical valve: it allows current to flow in one direction while preventing it from flowing in reverse. In roller applications, blocking diodes are commonly used in charging circuits and parallel battery or alternator configurations to prevent one source from back-feeding another, which can cause overcharging, battery drain, or component damage. When a blocking diode fails — either by shorting and allowing reverse current, or by opening and blocking all current — the result is typically a charging fault, electrical irregularity, or failure of connected control systems. Replacing a failed unit with a genuine Bomag part number 05755921 restores correct circuit behavior and protects the broader electrical system.
Part Details
| Part Number | 05755921 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Blocking Diode |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Single Drum Roller | BW 213 D | 00810062, 00814209 |
| Walk-Behind / Light Roller | BW 6 | 00817554, 00817955, 00818665 |
| Walk-Behind / Light Roller | BW 6 S | 00817555, 00817957, 00818683 |
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.
