Siemens Miniature circuit breaker, C-curve, 3-pole, 400V, 10kA, 25A Part number 5SY4325-7

Product Overview

The Siemens 5SY4325-7 is a miniature circuit breaker in the SENTRON 5SY4 series, 3-pole, rated 25 A with C-characteristic curve and 10 kA breaking capacity at 400 V AC. It is designed for overcurrent and short-circuit protection in three-phase installations, offering reliable circuit protection, compact DIN-rail installation and secure screw-terminal wiring connections for industrial and building electrical systems.

Key Features

• 3-pole miniature circuit breaker (3P)
• Rated current: 25 A
• Tripping characteristic: C (moderate inrush tolerance)
• Rated operational voltage: 400 V AC (also suitable for 230/400 V networks)
• Breaking capacity: 10 kA — ensures safe disconnection under fault conditions
• Screw-type terminals for secure and flexible conductor connection
• Compact modular width for DIN-rail installation (standard 35 mm rail)
• Mechanical endurance typical of 5SY4 breakers — reliable over many switching cycles
• Suitable for industrial, commercial, and residential electrical distribution systems

Technical Specifications

• Article Number: 5SY4325-7
• Product Series: SENTRON 5SY4 miniature circuit breakers
• Poles: 3 (3-Pole)
• Rated Current (In): 25 A
• Tripping Curve / Characteristic: C-curve
• Rated Operational Voltage (AC): 400 V AC (also applicable for 230/400 V systems)
• Short-Circuit Breaking Capacity (Icu): 10 kA
• Terminal Connection: Screw-type terminals suitable for standard conductor sizes
• Mounting: DIN-rail (35 mm) mounting — standard for distribution panels
• Device Width: Modular width (single-unit width per pole) — compact design
• Protection Class (with connections): IP20
• Mechanical Service Life: Typical 10,000 switching cycles (typical for 5SY4 series) :contentReference[oaicite:1]{index=1}
• Overvoltage Category / Pollution Degree: Category III / Pollution Degree 3 (standard for low-voltage distribution) :contentReference[oaicite:2]{index=2}
• Use Case: Circuit protection for three-phase loads, feeders, motor supply circuits, general distribution boards

Compliance & Standards

• Part of Siemens SENTRON 5SY4 MCB family — designed according to IEC/EN standards for miniature circuit breakers :contentReference[oaicite:3]{index=3}
• Suitable for industrial, commercial, and residential low-voltage applications requiring reliable overcurrent protection

Applications

The 5SY4325-7 is ideal for protecting three-phase circuits in distribution boards, control panels, industrial installations, and building electrics. It can safeguard motors, heaters, lighting circuits, general power feeders or any three-phase load against overloads and short circuits — providing compact, robust and cost-effective protection for a wide variety of applications.