EG4 BSB 90A AC Circuit Breaker | Compatible with FlexBOSS21 Hybrid Inverter

EG4 BSB 90A AC Circuit Breaker | Reliable Protection for High-Capacity AC Power Systems

The EG4 BSB 90A AC Circuit Breaker is designed to provide dependable overcurrent protection for demanding AC power applications, including solar energy systems, battery backups, and off-grid installations. Built to handle higher amperage loads with precision, this breaker helps safeguard your equipment, wiring, and overall system performance.

Engineered for durability and consistent operation, the 90A rating makes it an ideal choice for larger residential or light commercial systems where stable, uninterrupted power is critical. The breaker’s fast trip response helps prevent damage from overloads or short circuits, giving you confidence in both everyday operation and unexpected conditions.

Whether you're building out a new system or upgrading an existing setup, the EG4 BSB 90A AC Circuit Breaker offers a simple, effective solution for maintaining safety and control within your power infrastructure.

EG4 BSB 90A AC Circuit Breaker Features

This breaker stops dangerous overloads before they damage your system

Built to detect and cut off overloads and short circuits instantly, it shields your EG4 power system from electrical faults. Think of it as a dependable bodyguard that reacts fast — protecting your equipment every single time.

It fits your EG4 FlexBOSS21 inverter perfectly without any hassle

Designed specifically for EG4's FlexBOSS21 Hybrid Inverter, this breaker plugs in cleanly with no adapters or modifications needed. You get a smooth, compatible connection right out of the box saving you time and frustration.

The trip-free design keeps you safe even during a serious fault

When a fault happens, this breaker cannot be forced to stay on. It trips automatically to prevent damage or fire, giving you reliable hands-free protection especially useful in remote or unattended power setups.

It handles up to 10,000 amps of fault current without breaking down

With a 10,000 AIC interrupting rating, this breaker safely clears even high-energy short circuits. That high capacity means it won't fail under pressure keeping your system and home protected when it matters most.

One breaker works for both 120V and 240V power system setups

Rated for AC 120/240V at 50/60Hz, this breaker supports standard split-phase residential and light commercial systems. Whether at home or on a job site, it handles both voltages cleanly without needing a separate unit.

Extreme temperatures from freezing cold to blazing heat won't stop it

Rated from -40°C to +85°C, this breaker performs reliably in harsh weather year-round. Perfect for RVers, off-grid cabins, and outdoor installations where temperatures swing dramatically between seasons or locations.

It meets strict safety standards so your installation passes inspection easily

Listed under UL489 and IEC 60947-2, this breaker satisfies the safety requirements for residential and commercial electrical work in the U.S. Licensed electricians and permit inspectors will recognize and accept it without question.

EG4 BSB 90A AC Circuit Breaker Warranty

Backed by a 10-year manufacturer warranty from EG4, this circuit breaker is built for long-term performance and peace of mind. The warranty covers defects in materials and workmanship under normal use, ensuring dependable protection for years to come.

What's Included

• 1 x EG4 BSB 90A AC Circuit Breaker
• Mounting Hardware
• Installation and Safety Instruction Sheet