HYUNDAI ELECTRIC HBL-403 CIRCUIT BREAKER 300A 440VAC 42KA FREE

Meet the HYUNDAI ELECTRIC HBL-403 Circuit Breaker — a rugged, dependable protection device engineered for demanding electrical distribution across industrial, commercial, and high-demand residential environments. With its 300 A rating and 440 VAC operating capability, it’s built to handle intensive load profiles while keeping your systems protected from faults and overloads. This is more than a breaker; it’s a solid foundation for reliable power delivery in retrofit projects, upgrades, and maintenance replacements.

Key specifications

• Amperage rating: 300 A
• Voltage rating: 440 VAC
• Interrupting capacity: 42 kA
• Spaces / circuits: 403 circuit positions
• Brand: Hyundai Electric
• Model: HBL-403

Why this HBL-403 stands out

Designed for real-world service needs, the HBL-403 delivers consistent protection in environments where downtime isn’t an option. Its robust construction and precise trip characteristics help prevent cascading faults, protect downstream equipment, and minimize maintenance interruptions. The 42 kA interrupting rating provides confidence to safely interrupt high-energy faults, while the 300 A rating supports substantial feeder loads without sacrificing protection accuracy. This unit is purpose-built for professionals who assemble, upgrade, or maintain complex electrical distributions.

Ideal use cases

• Panel upgrades in aging facilities where a scalable, high-capacity breaker is required
• Retrofit projects that replace obsolete protection devices with modern, reliable components
• Maintenance replacement work to maintain system integrity and compliance
• Service installations in industrial settings, commercial buildings, and demanding residential complexes
• Stocking spares for rapid fault clearance and downtime reduction

Practical benefits and outcomes

With the HYUNDAI ELECTRIC HBL-403, you gain a circuit protection solution that aligns with serious load profiles and strict safety standards. Expect stable tripping behavior that matches actual fault conditions, clearer fault diagnostics for faster repair, and long-term reliability in harsh electrical environments. This breaker is a thoughtful choice for electricians, panel builders, and MRO teams who value predictable protection, easy integration into existing systems, and the peace of mind that comes with a trusted Hyundai Electric component.

Tips for optimal use

Before installation, verify compatibility with your panel framework and upstream protective devices. Ensure proper torque on connections and follow standard commissioning practices to confirm accurate trip curves. Use in configurations where high-energy faults are possible to maximize system safety and minimize downtime during protection events.