General Electric | SB421WG | Fusible Bus Plug | 30A | 240V

General Electric’s SB421WG Fusible Bus Plug is a precision-made protection component designed for maintenance, retrofit, and replacement projects where exact specifications matter. With a 30A rating at 240V, this part delivers dependable overcurrent protection while aligning with your existing GE equipment. The part number SB421WG is the clearest reference for compatibility, so always double-check fit and ratings before ordering to ensure a seamless upgrade or repair.

Functional benefits

This fusible bus plug serves as a critical interface in electrical distribution, enabling controlled interruption of current in the event of an overload. By using the exact GE part, you preserve protective coordination within your system, reduce the risk of compatibility issues, and minimize downtime during servicing or upgrades. It’s a purpose-built solution for reliable protection where precise specifications are essential.

Core specifications

• Amperage: 30A
• Voltage: 240V
• Part number: SB421WG
• Applications: maintenance, retrofit, and replacement requiring exact spec matching

Ideal use scenarios

• Replacing a worn or blown bus plug in GE-compatible panels or assemblies during routine maintenance.
• Retrofitting older equipment to restore proper protection levels without introducing mismatched components.
• Stocking a genuine GE replacement for quick rollout in service calls, minimizing equipment downtime.

Compatibility and how to verify

To ensure a proper fit, compare your equipment’s listed specifications with this part’s 30A, 240V rating and use the SB421WG part number as the definitive reference. Confirm that the plug is intended for the same GE model family and that the overcurrent protection scheme in your panel matches the device’s rating. When in doubt, consult your equipment’s documentation or reach out to an authorized distributor to verify compatibility before purchase.

Why choose this GE part

Choosing the SB421WG means prioritizing exact specification alignment over generic substitutes. This reduces the risk of improper protection settings, helps maintain proper fault current coordination, and supports smoother maintenance operations. For technicians and facilities teams working with GE systems, using the manufacturer’s fusible bus plug helps ensure predictable performance and easier future servicing.

Practical tips for best results

• Inspect the surrounding connections for cleanliness and secure seating before installation.
• Maintain a small inventory of genuine GE parts to shorten downtime during outages or planned maintenance.
• Document the replacement with the part number SB421WG for future maintenance records and ordering accuracy.