GE TJJ436Y400 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the GE TJJ436Y400 — a 400A, 600V, 3-pole molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. Designed to tackle the demands of modern electrical layouts, this MCCB delivers reliable overcurrent and short-circuit protection where it matters most, from commercial spaces to light industrial environments.

Why the GE TJJ436Y400 stands out

• Compact molded case design minimizes panel footprint and simplifies routing inside crowded panels, helping you maximize available space without compromising performance.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining overload sensing (thermal) with instantaneous short-circuit response (magnetic), reducing nuisance trips and safeguarding sensitive equipment.
• 3-pole configuration supports three-phase systems, making it ideal for feeders and circuits in commercial and light industrial settings.
• 600V rating provides versatile compatibility for higher-voltage distributions, enabling safe operation across a broad range of applications.
• 400A continuous rating ensures robust protection for large branch circuits, feeders, and panelboard installations without compromising performance.
• OEM compatibility designed to pair with GE OEM loadcenters and panelboards for straightforward installation, reliable fit, and consistent electrical performance.

Ideal applications and use cases

• New panel installations or upgrades in small to mid-size commercial spaces where reliable 3-phase protection is required.
• Residential or light commercial service panels that demand a high-current, space-efficient breaker for feeders and distribution circuits.
• Light industrial electrical rooms where compact form factor and dependable thermal-magnetic protection help maintain uptime for motors, controls, and other critical loads.

What this breaker solves

• Protection against overcurrent faults that could damage wiring and equipment in high-current feeders.
• Fast, reliable short-circuit clearance to minimize damage and downtime on 3-phase circuits.
• Efficient use of panel space through a compact MCCB design, enabling cleaner wiring and easier future expansions.
• Seamless integration with GE panel systems, ensuring consistent electrical performance and straightforward commissioning.

Technical snapshot

• GE
• Part number: TJJ436Y400
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400A
• Voltage rating: 600V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection for panelboards and loadcenters

Whether you’re retrofitting an older GE panel or configuring a new loadcenter installation, the GE TJJ436Y400 provides precise, dependable protection with a form factor that respects panel space and wiring practicality. For electricians and facility managers, this 400A 3-pole MCCB is a deliberate, purpose-built choice when robust protection and seamless OEM compatibility matter.