Siemens HFK3T100L 100A 3-Pole 600 V Circuit Breaker

Siemens HFK3T100L is a rugged, reliable protection solution for three-phase power systems. With a 100 A current rating and a 600 V maximum voltage, this 3-pole circuit breaker provides precise overcurrent protection for industrial and commercial panel boards, helping to safeguard wiring, equipment, and uptime.

• Three-pole design: Protects all three conductors in a 3-phase circuit, ensuring balanced protection across phases and coordinated tripping behavior.
• 100 A rating: Ideal for main or feeder protection in mid-range distribution panels and motor-driven loads where robust protection is required.
• 600 V maximum rating: Suitable for typical industrial power systems, data centers, and commercial facilities operating at higher voltage levels.
• Exact replacement part: Part number HFK3T100L guarantees seamless compatibility with Siemens panels and legacy HFK3T-series installations.
• Trusted Siemens protection: Built on decades of electrical safety engineering, delivering dependable trip performance and long-term reliability.

Use cases and scenarios

• Main service disconnects in three-phase commercial buildings and light manufacturing facilities requiring clear, reliable protection for all three phases.
• Feeding three-phase motor control centers where consistent protection helps minimize equipment wear and unexpected downtime.
• Panel-board upgrades or replacements in facilities with Siemens protection ecosystems, enabling plug-and-play compatibility and streamlined maintenance.

What problems does it solve?

• Prevents damage from overloads and short circuits in 3-phase systems, protecting wiring insulation, downstream devices, and connected machinery.
• Reduces unplanned outages by providing predictable, standards-aligned trip behavior that aligns with downstream protection schemes.
• Supports safer, compliant electrical distribution by maintaining proper coordination within Siemens-compatible panels.

Who is this for?

• Electrical contractors installing or upgrading Siemens panel boards and service equipment.
• Facility engineers and plant managers overseeing reliable three-phase power in factories, warehouses, or large commercial facilities.
• OEM integrators and system designers seeking a precise, compatible replacement for existing HFK3T installations.

Practical tips

• Ensure compatibility with Siemens panels designed for HFK3T-series protection to maintain optimal trip characteristics and panel coordination.
• Replace like-for-like when upgrading or maintaining existing Siemens circuitry to preserve system integrity and warranty alignment.
• Follow Siemens installation guidelines and local electrical codes during replacement or installation to ensure safe, compliant operation.

Choose the Siemens HFK3T100L for a purpose-built, reliable solution that aligns with your 3-phase, 600 V electrical infrastructure. This 100 A, 3-pole circuit breaker delivers predictable protection, straightforward replacement, and the assurance of Siemens engineering in every trip.