3VA9038-0LB10 - Handle Blocking Device - 3VA51

3VA9038-0LB10 -  Handle Blocking Device - 3VA51

When you need to keep a circuit breaker exactly where it’s set—no surprises—the Siemens 3VA9038-0LB10 handle blocking device is a simple, effective solution. Built for use with Siemens 3VA51 circuit breakers, this accessory lets you secure the breaker handle in place, helping reduce the risk of accidental or unauthorized operation.

It’s the kind of part that doesn’t draw attention to itself, but it plays an important role—especially during maintenance or when following lockout/tagout procedures. Once installed, it helps ensure the breaker stays in the intended position, giving technicians and operators added peace of mind.

Because it’s designed by Siemens for the SENTRON line, you can expect a proper fit and consistent performance. There’s no need to modify your setup or deal with complicated installation—it’s made to work with the equipment you already have.

Key Features and Benefits

• Keeps breaker handle securely in position
• Helps support lockout/tagout (LOTO) safety practices
• Designed specifically for Siemens 3VA51 series
• Quick and straightforward to install
• Compact design that won’t interfere with panel layout
• Reliable performance from a trusted manufacturer

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: 3VA9038-0LB10
  
• Product Type: Handle Blocking Device / Locking Provision
  
• Compatible Breakers: Siemens 3VA51
  
• Net Weight: 0.042 kg (42 g)
  
• Country of Origin: China
  

Material Compliance and Certifications

• Complies with RoHS requirements (since 2016)
• Meets REACH regulations
• Not classified as hazardous material-
• No export restrictions (AL: N / ECCN: N)

Where It Works Best

• Industrial facilities with safety procedures in place
• Commercial electrical panels and distribution systems
• Maintenance work where equipment needs to stay isolated
• Data centers and controlled environments
• Panel builders and contractors working with Siemens systems