Siemens 3VA9257-0FK21 SENTRON Door Rotary Operator IP65 for 3VA1 Frame 250

The Siemens 3VA9257-0FK21 is a SENTRON door-mounted rotary operating mechanism (door-coupling rotary operator) for 3VA1 Frame 250 molded-case circuit breakers (e.g. 3VA12 series). It provides manual ON/OFF/TRIP operation from the enclosure door with an integrated door interlock that prevents opening while the breaker is closed. Standard IEC version with IP65 protection at the front.

Technical specifications:

• Order number (MLFB): 3VA9257-0FK21
• Manufacturer: Siemens
• Product line: SENTRON
• Product type: Door-coupling rotary operating mechanism
• Standard: IEC
• Compatible circuit breakers: 3VA1 Frame 250 (3VA12 series)
• Door interlock: Yes
• Protection class IP: IP65 (front)
• Height: 75 mm
• Width: 105 mm
• Net weight: 558 g
• Approvals: General Product Approval, EMC, Maritime application, environmental confirmations, type test certificates
• EAN/GTIN: 4042949005988

Features and benefits:

• IP65 sealed front for installation on enclosure doors in dusty, humid or wet environments
• Door interlock prevents opening the cabinet door while the circuit breaker is in the ON position - meets industrial safety requirements
• Manual ON / OFF / TRIP indication directly on the door without opening the cabinet
• Padlockable in OFF position (lockout/tagout-ready) for safe maintenance procedures
• Maritime approval - suitable for shipboard and offshore distribution panels
• Compact 75 x 105 mm front footprint for retrofit in existing enclosures

Applications:

• Front-door operation of 3VA1 Frame 250 circuit breakers in industrial control cabinets and distribution boards
• Lockout / tagout safety circuits requiring padlockable OFF position
• Maritime and shipboard distribution panels with IP65 protection requirements
• Outdoor enclosures and field cabinets needing sealed front operation

Also known as: Siemens 3VA9257-0FK21, SENTRON door-coupling rotary mechanism 3VA1, 3VA12 IP65 rotary handle, 3VA1 Frame 250 door operator IEC.