Siemens 3VA2340-5HN32-0AA0 Molded Case Circuit Breaker 3P 400A 55kA ETU350

The Siemens 3VA2340-5HN32-0AA0 (MLFB) is a SENTRON 3VA2 series molded case circuit breaker designed for line protection in industrial power distribution. It provides LSI (overload, short-circuit, and instantaneous) protection via the ETU350 electronic trip unit, with a rated current of 400 A across a 3-pole configuration. Breaking capacity class M gives an Icu of 55 kA at 415 V.

Technical specifications:

• MLFB: 3VA2340-5HN32-0AA0
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Molded case circuit breaker (MCCB)
• Trip unit: ETU350, LSI protection
• Number of poles: 3
• Rated current (In): 400 A
• Overload setting range (Ir): 160 A - 400 A
• Short-circuit setting (Isd): 1.5 - 10 x Ir (240 A - 4,000 A)
• Instantaneous setting (Ii): 10 x In (4,000 A)
• Breaking capacity class: M (IEC 60947)
• Icu at 415 V: 55 kA
• Icu at 240 V: 85 kA
• Icu at 500 V: 36 kA
• Icu at 690 V: 5 kA
• Rated operating voltage (AC): 690 V
• Insulation voltage: 800 V
• Terminal connection: Nut keeper kit, front terminal, flat-bar 20x1 mm - 35x10 mm
• IP rating: IP40 (front)
• Operating temperature: -25 °C to +70 °C
• Dimensions (WxHxD): 138 x 248 x 110 mm
• Net weight: 4.6 kg
• Power loss per pole (rated, hot state): 32 W
• Mechanical service life: 20,000 operating cycles
• Optional motor drive: available

Features and benefits:

• ETU350 electronic trip unit enables independent adjustment of overload (Ir) and short-circuit (Isd, Ii) thresholds
• Breaking capacity class M with Icu = 55 kA at 415 V suits high-fault-level industrial installations
• Ics equals Icu at 415 V, confirming full short-circuit capability in service conditions
• Silver-plated connections on both top and bottom terminals for reliable contact performance
• Nut keeper kit terminals accommodate flat-bar busbars up to 35x10 mm for panel integration
• Optional motor drive accessory allows remote or automated operation

Applications:

• Main or feeder circuit protection in industrial switchboards and motor control centers
• Line protection for large motors, transformers, and distribution feeders up to 400 A
• Low-voltage power distribution panels in manufacturing facilities and infrastructure
• Applications requiring adjustable short-circuit and overload protection with IEC 60947 compliance

Compliant with IEC 60947-2. Part of the Siemens SENTRON range.

Also known as: Siemens 3VA2340-5HN32-0AA0, Siemens SENTRON 3VA2 400A MCCB, Siemens 3VA2 Frame 400 circuit breaker.