3VA9138-0LB11 - Padlockable Device - 250A

3VA9138-0LB11 -  Padlockable Device - 250A

If you’re working around live electrical systems, one mistake can cost you time, money, or worse. That’s exactly why the Siemens 3VA9138-0LB11 lock-off device exists. It gives you a simple, no-nonsense way to lock your breaker in the OFF position so nobody accidentally powers things back up while work is being done.

This isn’t some complicated add-on. It’s a straightforward, padlockable safety solution designed for Siemens 3VA circuit breakers up to 250A, helping you stay compliant with lockout/tagout (LOTO) procedures while protecting your team on the job. Install it once, and you’ve got peace of mind every time maintenance or service work begins.

Its compact size means it won’t get in your way, but when it comes to safety, it does exactly what it’s supposed to—no guesswork, no shortcuts.

Key Features and Benefits

• Lockout/Tagout Ready – Keeps breakers securely in the OFF position during maintenance
• Padlockable for Added Security – Prevents unauthorized or accidental re-energizing
• Designed for 250A Systems – Built to support higher-capacity breaker applications
• Compact, Space-Saving Design – Fits neatly without crowding your panel
• Quick, Simple Installation – No complicated setup or special tools required
• Reliable Siemens Engineering – Built to perform in demanding environments

Technical Specifications

• Part Number: 3VA9138-0LB11
  
• Product Type: Lock-Off Device (Padlockable)
  
• Sub Category: LOCK-OFF
  
• Maximum Amperage Compatibility: 250A
  
• Dimensions:Height: 3.0 in
  Width: 3.0 in
  Depth: 0.5 in
  
• Weight: Not specified
  
• Poles: Not specified
  
• A.I.C. Rating & Volts: Not applicable (accessory)
  
• Frame Type: Not specified
  

Material Compliance and Certifications

• This lock-off device is manufactured to meet Siemens’ strict quality standards and is suitable for use in environments that require adherence to OSHA lockout/tagout (LOTO) safety practices. It supports safe electrical isolation procedures when used correctly within compliant systems.

Where It Works Best

• Industrial plants where equipment is serviced regularly
• Commercial facilities that require controlled electrical shutdowns
• Maintenance teams follow strict LOTO procedures
• Manufacturing operations with high-amperage systems
• Electrical contractors who don’t take shortcuts on safety