Siemens | CLF63B125 | Circuit Breaker | 125A | 3-Pole | 600V | Bolt-On

Siemens CLF63B125 is a dependable 125A, 3-pole circuit breaker engineered for demanding industrial power systems. With a 600V rating and bolt-on mounting, this unit delivers secure electrical protection alongside straightforward retrofit and replacement in Siemens-compatible panels and equipment. When you need a precise, field-ready solution, the CLF63B125 delivers trusted performance you can rely on.

Key specifications

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 600V
• Mounting: Bolt-On
• Part number reference: CLF63B125

Why bolt-on matters

• Bolt-on mounting provides a robust, mechanically secure connection that stands up to vibration and operational stresses in industrial environments.
• Designed for straightforward field installation and reliable long-term performance in compatible panels and enclosures.
• Ideal for retrofit projects where a precise fit and seamless integration with existing Siemens protection schemes are essential.

Compatibility and fit

Confirm fit and ratings before ordering. The part number CLF63B125 is the best reference for compatibility, ensuring you choose the exact breaker that matches your panel design and system requirements.

Ideal use cases

• Maintenance and replacement in service panels and industrial control centers that require 3-phase protection.
• Retrofit projects upgrading or modernizing electrical infrastructure with Siemens components.
• OEM equipment replacements where a 125A, 3-pole, 600V bolt-on breaker is specified.

Installation and operation tips

• Before installation, verify that the panel or enclosure supports bolt-on breakers of this type and rating.
• Always follow standard electrical safety practices: power down, lockout/tagout, and use the correct mounting hardware for a secure fit.
• Ensure electrical connections are clean and free of corrosion to maintain reliable contact and protection performance.
• Consult your panel’s documentation for any torque requirements or installation constraints relevant to bolt-on breakers.

Why this Siemens circuit breaker stands out

The Siemens CLF63B125 blends precise current protection with a robust bolt-on design, tailored for three-phase 600V systems. Its 125A rating makes it suitable for substantial load paths while preserving the flexibility to retrofit or replace in existing Siemens-architected installations. If you’re upgrading panels, replacing worn components, or outfitting OEM equipment with a reliable protection device, this bolt-on breaker provides a solid, spec-aligned choice that keeps your electrical system safe and compliant.