General Electric | SL421RI | Fusible Bus Plug | 30A | 3-Pole | 240V

The General Electric SL421RI Fusible Bus Plug is a precise, drop-in protection module designed for 240V electrical distributions. With a 30A rating and a 3-pole configuration, this bus plug is purpose-built for maintenance, retrofit, and replacement tasks where exact specifications matter, helping you keep critical systems online without guesswork.

• Amperage: 30A
• Poles: 3-Pole
• Voltage: 240V
• Type: Fusible bus plug
• Part number: SL421RI
• Brand: General Electric (GE)

Where this fusible bus plug shines

Designed for GE panel systems, the SL421RI serves as a reliable replacement or retrofit option when your protection scheme must align with existing equipment. It’s ideal for facilities that rely on stable 240V, three-phase distribution and need a dependable, spec-matched component to restore or upgrade protection without overhauling legacy hardware.

Key benefits and practical use cases

• The 30A rating is matched to feeders and circuits that require precise overcurrent protection, reducing the risk of nuisance trips or insufficient protection.
• With a dedicated part number (SL421RI), you’ve got a straightforward replacement path that minimizes downtime during service windows.
• When upgrading or refurbishing 3-pole 240V systems, this bus plug ensures compatibility with existing GE configurations, preserving system behavior and protection schemes.
• Having a compatible fusible bus plug on hand shortens lead times for repairs, keeping critical equipment operating as intended.

Important compatibility and ordering notes

Before you order, confirm fit and ratings to ensure seamless integration with your panel. The part number is the best reference for compatibility, so verify that SL421RI matches your GE equipment and your 240V, 3-pole configuration. If you’re maintaining or upgrading an existing GE-based distribution setup, this fusible bus plug is designed to slot into place with minimal effort, helping you maintain consistent protection characteristics across your system.

Who this is for: electrical technicians, facilities managers, and maintenance teams responsible for GE panel systems requiring precise, ready-to-install fusible bus protection at 240V. If you’re tasked with preserving uptime and ensuring correct amperage and pole configuration in a 3-phase setup, the SL421RI is a targeted, spec-driven choice that aligns with your operational needs.