Siemens 3RH19111BA10 Terminal Block, Auxiliary Switch, Normally Open | AmpState

Meet the Siemens 3RH19111BA10 terminal block—a purpose-built solution for clean, reliable wire termination and distribution inside control enclosures. Engineered to serve as the exact replacement part for original installations, it helps you keep your bill of materials aligned while minimizing downtime during replacements or upgrades.

This model features an integrated auxiliary switch with a normally open contact, enabling straightforward status signaling and interlock control without adding extra components to your panel. It’s the kind of detail that makes electrical diagrams simpler and wiring harnesses more compact in tight enclosures.

Why this matters in real-world terms: when you swap in the 3RH19111BA10, you’re not just replacing a block—you’re preserving the electrical footprint, mounting pattern, and compatibility with your existing wiring schemes. That means faster repairs, fewer surprises during maintenance, and improved reliability across your automation cabinet. It’s especially valuable for replacement projects, long-term spares planning, and any scenario where BOM integrity is non-negotiable.

• Manufacturer: Siemens
• Part Number: 3RH19111BA10
• Product Type: Terminal Block
• Auxiliary Switch: Normally Open

This terminal block is ideal for control panels, machine enclosures, and automation cabinets where orderly wire termination and a built-in signaling path are priorities. With the auxiliary contact, you can monitor circuit status, drive interlocks, and feed control logic without extra assemblies.

• Exact form, fit, and function to match the original equipment and BOM — simplify spares management and reduce installation guesswork
• Streamlined replacement workflow: fewer mismatches, faster commissioning, and better diagnostic clarity
• Integrated auxiliary switch (normally open) supports simple signaling to PLCs, safety circuits, and interlock logic
• Availability through AmpState for dependable sourcing of legitimate Siemens parts

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.