Description
The Siemens FN Switch is a manual load break switch designed for reliable disconnection and isolation of electrical circuits. It ensures visible isolation and safe operation during maintenance or emergency shutdown. The switch is robust, compact, and widely used in industrial panels, distribution boards, and capacitor bank panels.
Specifications (general range, varies by model)
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Poles: 3-pole / 4-pole
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Rated Current: 32A – 1600A (depending on variant)
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Rated Voltage: Up to 690V AC
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Mounting: Panel / Base / DIN Rail options
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Standard Compliance: IEC 60947-3
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Operation: Manual rotary handle (front or side mounted)
Features
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Compact and modular design
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High breaking capacity with reliable arc quenching
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Padlockable handle for safety lockout
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Clear ON/OFF position indication
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Suitable for AC-23A utilization category (motor loads, mixed resistive/inductive loads)
Applications
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Industrial power distribution panels
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Capacitor bank switching
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Motor control centers (MCCs)
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Isolation and maintenance disconnection
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Backup/emergency shutdown in electrical systems
Advantages
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High electrical and mechanical endurance
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Provides visible, reliable isolation
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Compact size saves panel space
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Easy to integrate with panel accessories
Disadvantages
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Manual operation only (not motorized)
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Limited to switch-disconnector use, not suitable for circuit protection (no short-circuit breaking like MCCBs)
