Siemens Miniature circuit breaker, 2-pole, 400V, 10kA, 4A Part number 5SY4204-7

Product Overview

The Siemens 5SY4204-7 is a miniature circuit breaker (MCB) from the SENTRON 5SY4 series. It is a 2-pole breaker with a rated current of 4 A and a tripping characteristic of Type C, designed for protection against overloads and short circuits in small circuits or control wiring. With a compact design and DIN-rail mounting capability, it is suitable for residential, commercial and light-industrial distribution boards or control panels.

Key Features

• 2-pole (2P) miniature circuit breaker
• Rated current: 4 A
• Tripping characteristic: Type C — suitable for general circuits with moderate inrush currents
• Breaking capacity: 10 kA (suitable for typical fault current levels in low-voltage installations)
• Compact design — standard module width for DIN-rail mounting and easy panel installation
• Compatible with 230/400 V AC supply systems (single-phase or multiphase)
• Protection against overloads and short circuits — safeguarding wiring and downstream equipment
• Simple toggle switch operation for manual reset after fault clearance

Technical Specifications

• Article Number: 5SY4204-7
• Product Type: Miniature Circuit Breaker (MCB), SENTRON 5SY4 series
• Number of Poles: 2 (2-pole breaker)
• Rated Current (In): 4 A
• Tripping Curve: C
• Breaking Capacity (Icu): 10 kA at rated voltage
• Rated Voltage: 230/400 V AC
• Mounting: DIN-rail (standard width module)
• Application Range: Distribution boards, control circuits, small load protection

Applications

The 5SY4204-7 is ideal for over-current and fault protection in low-power circuits, lighting circuits, control wiring, small equipment feeds, distribution boards and general-purpose circuit protection in residential, commercial or light-industrial installations. Its moderate 4 A rating and compact 2-pole format make it particularly suited for branch circuits, control panels, auxiliary circuits or protection of wiring for smaller loads.