Siemens A6X30138912 — Mushroom Pushbutton Operator

Parameter Summary

The A6X30138912 is a 30 mm mushroom-actuator operator body from the Siemens 3SU1 series. It is a non-illuminated, panel-mount operator designed for use in 22 mm cutout enclosures. The part is packaged as a standalone operator and requires separate contact block modules to complete a functional switch assembly.

Product Context — 3SU1 Modular Pushbutton System

The Siemens 3SU1 range is a modular operator system built around a 22 mm panel standard. Each operator body (the mushroom head here) is ordered separately from the contact blocks that perform the actual switching function. This split ordering allows panel builders to specify actuator style, color, and head type independently from the electrical pole count and contact arrangement.

The "mushroom" actuator denotes a raised, oversized operator head that projects above the bezel for ease of finger activation. Mushroom operators are commonly specified where rapid make/break is needed or where deliberate operator engagement is required. The 30 mm sizing in this listing indicates a standard-throw mushroom head, as opposed to extended-throw or jumbo variants that appear in the same family.

In-Catalog Comparison — 3SU1 Mushroom and Dual-Head Variants

The four MPNs with similarity 1.0 (A6X30138910, A6X30138911, A6X30138913, A6X30138914) share identical published parameters with the seed. The catalog records do not provide distinguishing variant data (e.g., contact arrangement, terminal type, or special function codes) that would explain the separate MPNs; therefore no functional differentiation can be inferred from the available data.

The three remaining alternates (A6X30138902, A6X30138992, A6X30138982) differ in actuator color and size, retaining the same mushroom form factor and 3SU1 series compatibility.

The A6X30138918 is a dual-head oval pushbutton with a green/red twin configuration — a different actuator geometry rather than a larger mushroom.

Engineering Verification Checklist

• Confirm actuator color and size meet the panel's human factors requirements
• Verify 22.3 mm round cutout is available in the enclosure design
• Select compatible Siemens 3SU1 contact blocks (sold separately) for the required pole count
• Check that the non-illuminated style is appropriate where no lamp circuit is planned
• Confirm DIN-rail or front-panel mounting orientation as required by the application
• Review that ROHS3 compliance satisfies the target assembly's environmental requirements

FAQ

What is the difference between A6X30138912 and the other 30 mm green mushroom parts (A6X30138910, A6X30138911, A6X30138913, A6X30138914)?

The catalog records do not include distinguishing specifications (such as contact configuration, terminal style, or functional coding) for these variants. Any differentiation must be confirmed through Siemens' ordering system or with the supplier's technical support.

What contact blocks are needed to complete the switch assembly?

The A6X30138912 requires Siemens 3SU1 contact block modules. The compatible series is listed as "Siemens, 22mm" which corresponds to the standard 3SU1 contact block lineup. Pole count and normally open / normally closed arrangement depend on the specific contact blocks selected.

What panel cutout is required?

The operator requires a 22.3 mm round hole, consistent with the Siemens 22 mm panel-mount standard used throughout the 3SU1 modular system.