Pre-Wired Blocking Diode Assembly helps prevent unwanted circuit backfeeding in bilge pump float switch and marine electrical systems.
Bilge Pump Blocking Diode Assembly
$8.79
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Product Description
Bilge Pump Diode Assembly – Pre-Wired 20A Blocking Diode
This pre-wired bilge pump diode assembly simplifies the installation of automatic bilge pump float switches and other marine electrical circuits that require one-way current flow. The diode acts like an electrical check valve, allowing power to flow in one direction while preventing unwanted backfeeding into switches, indicators, alarms, or other connected circuits.
Without a blocking diode, an automatically activated float switch can sometimes send power backward through the manual control circuit, causing switch lights, warning buzzers, dash indicators, or other accessories to operate unintentionally. This assembly helps eliminate those issues while simplifying installation.
Each unit is built using a 20A diode and comes pre-wired with marine-grade leads, a #8 ring terminal, and a heat-shrink butt connector for fast, reliable installation.
Features
- Pre-Wired & Ready to Install – No soldering, crimping, or diode identification required.
- Prevents Circuit Backfeeding – Helps eliminate unwanted switch illumination, alarm activation, and indicator operation caused by reverse current flow.
- Ideal for Bilge Pump Float Switches – A common solution when installing a bilge pump diode to isolate automatic and manual control circuits.
- Marine-Grade Construction – Built with 14 AWG wire leads and heat-shrink protected connections for marine environments.
Specifications
- Peak Inverse Voltage: 45V
- Average Forward Current: 20A
- Peak One-Cycle Non-Repetitive Surge Current: 250A
- Wire Size: 14 AWG
- Terminal: #8 Ring Terminal
- Includes Heat-Shrink Butt Connector
- 20A Diode
Common Applications
- Automatic bilge pump float switch circuits
- Marine electrical circuits requiring backfeed protection
- Custom relay and switching applications
What’s Included
- Pre-wired 20A blocking diode assembly
- #8 ring terminal
- Heat-shrink butt connector
Whether you’re wiring a float switch, troubleshooting unwanted circuit backfeeding, or replacing an existing bilge pump diode, this pre-wired assembly provides a simple, reliable solution that is ready to install right out of the package.




