Siemens Miniature circuit breaker, D, 3-pole, D=70mm, 400V, 15kA, 40A Part number 5SY7340-8

Product Overview

The Siemens 5SY7340-8 is a 3-pole miniature circuit breaker from the SENTRON 5SY7 series, rated for 40 A at 400 V AC with a tripping characteristic D and a breaking capacity of 15 kA.

Key Features

• 3-pole configuration for three-phase circuit protection
• D-curve (tripping characteristic) ideal for high inrush currents
• Rated operational current (In): 40 A
• Breaking capacity: 15 kA (AC) up to 20 kA per IEC 60947-2
• Width equal to 3 modular units (≈ 54 mm), compact panel-mount footprint

Technical Specifications

• Product Series: SENTRON 5SY7 mini-circuit breakers
• Article Number: 5SY7340-8
• Number of Poles: 3
• Tripping Characteristic: D
• Rated Current (In): 40 A
• Rated Operational Voltage (Ue): 400 V AC
• Breaking Capacity (Icn): 15 kA (AC) standard; 20 kA per IEC 60947-2
• Width/Modular Units: 54 mm / 3 modules
• Depth (installation): 70 mm
• Height: 90 mm
• Net Weight (Approx.): 0.478 kg
• Protection Class: IP20 (with connected conductors)

Compliance & Certifications

• Conforms with IEC/EN 60898-1 and IEC/EN 60947-2 standards for miniature circuit breakers
• Designed under Siemens SENTRON industrial quality standards

Applications

The Siemens 5SY7340-8 is suited for commercial and industrial three-phase power distribution systems where compact, high breaking-capacity protection is required. It is ideal for protecting feeders, motors with high starting current, and general three-phase loads with potential high fault currents.