Siemens UV423 - 100A, 240V, 3-Phase, Fusible, Switch

Meet the Siemens UV423, a robust 100A, 240V, 3-Phase Fusible Switch designed for reliable on/off isolation and overcurrent protection in demanding industrial and commercial environments. Built to endure tough conditions, this compact switch delivers dependable operation, straightforward maintenance, and clean integration into compact panel layouts.

Key capabilities

• 100A, 240V three-phase protection— engineered to handle standard motor loads and other 3‑phase equipment with balanced performance.
• Fusible design— provides built-in overcurrent protection, enabling safe isolation and fault current interruption without extra devices.
• Compact, maintainable form— a streamlined footprint that simplifies installation, wiring, and servicing in crowded electrical spaces.
• Robust isolation— trusted Siemens reliability for consistent performance in industrial and commercial settings.

Ideal use cases

• Motor disconnects for conveyors, pumps, fans, and processing equipment
• Panelboards and branch circuits where space is at a premium but protection is essential
• Facilities that require a single, maintainable fusible switch to simplify electrical layouts

How it works

The UV423 provides controlled, physical disconnection of three-phase power while integrating fuse-based protection. In the event of an overcurrent, the fuse elements interrupt the circuit, safeguarding downstream equipment and enabling safe, isolated maintenance. This fusible switch consolidates protection and isolation into one compact unit, reducing wiring complexity and improving serviceability.

Specifications at a glance

• Model: UV423
• Amperage: 100A
• Voltage: 240V
• Phase: 3-Phase
• Fused: Yes (fusible switch)

Why choose the Siemens UV423

For facilities managers, electricians, and OEMs aiming to simplify power protection without sacrificing reliability, the UV423 delivers a compact, easy-to-service solution that pairs precise overcurrent protection with straightforward isolation. Its three-phase design supports balanced load handling, helping extend motor life and reduce downtime. Whether upgrading an existing panel or designing a new distribution scheme, this switch offers a dependable, space-efficient way to protect critical circuits.

Practical tips for optimal use

• Pair the UV423 with the appropriate Siemens fuses designed for your specific motor and circuit requirements.
• Plan wiring pathways to maximize accessibility for fuse replacement and servicing.
• Label circuits clearly to ensure quick isolation during maintenance or in emergency scenarios.