Siemens Miniature circuit breaker, C-curve, 3-pole, 400V, 6kA, 6A Part number 5SL6306-7

Product Overview

The Siemens 5SL6306-7 is a 3-pole miniature circuit breaker (MCB) from the SENTRON 5SL6 series. It provides over-current and short-circuit protection for three-phase low-voltage AC distribution circuits. With a C-characteristic trip curve and a 6 A rated current, it is suitable for small to medium load protection in three-phase panels where coordinated branch protection and reliability are required.

Key Features

• 3-pole miniature circuit breaker (MCB), SENTRON 5SL6 series
• Rated current: 6 A
• Tripping characteristic: Curve C — suitable for general-purpose three-phase circuits with moderate inrush currents
• Breaking capacity: 6 kA (short-circuit breaking capacity at 400 V AC)
• Rated for 400 V AC / 440 V AC (insulation voltage Ui), typical for three-phase distributions
• Compact DIN-rail mounting — 3-pole width, suitable for standard distribution boards / panel installations
• IP20 protection rating (with connected conductors and enclosure cover) — suitable for enclosed distribution boards
• Typical mechanical life: 10,000 switching cycles — ensuring long-term reliability

Technical Specifications

• Article Number: 5SL6306-7
• Product Type: Miniature circuit breaker (MCB), 3-pole
• Series: SENTRON 5SL6
• Rated Current (In): 6 A
• Tripping Curve: Type C
• Poles: 3 (3P)
• Rated Voltage (AC): 400 V (with Ui up to 440 V)
• Short-Circuit Breaking Capacity (Icn / Icu): 6 kA
• Insulation Voltage (Ui): 440 V AC
• Protection Class: IP20 (with cover/enclosure)
• Mechanical Service Life: ~10,000 switching cycles
• Usage: Over-current & short-circuit protection for three-phase circuits, feeders, branch circuits in distribution boards
• Mounting: 35 mm DIN-rail standard

Compliance & Standards

• Part of Siemens SENTRON 5SL6 breaker family — designed to meet low-voltage circuit-breaker standards.
• IEC / EN compliance for MCBs (short-circuit breaking capacity, insulation voltage, tripping characteristic, mechanical life)
• Suitable for use in residential, commercial, light-industrial, or panel distribution setups under 400 / 440 V three-phase supply

Applications

The 5SL6306-7 is suitable for three-phase branch-circuit protection in industrial or commercial distribution boards, control panels, motor feeder protection (for small motors within 6 A rating), light machinery circuits, lighting systems, and general-purpose power distribution feeders. It is also suited for compact distribution boards or modular busbar-based systems requiring 3-pole protection.