Siemens A6X30139920 — Illuminated Mushroom Pushbutton, 40mm (3SU1 Series)

Key Parameters

The seed record lists the product as an Active catalog item with no supplementary electrical ratings (current, voltage, IP rating, mechanical life) or material/finish data. Ordering and field-service context therefore rest on Siemens 3SU1 family conventions and the stated physical dimensions.

Overview

The A6X30139920 is the 40mm-head variant within Siemens' 3SU1 configurableswitch range. Mushroom-head operators are typically selected in machine-control applications where a prominent override or emergency-stop interface is required and where a push-to-lock / twist-to-release gesture is specified. The seed part is the illuminated version, which adds a lamp-holder requirement to the contact-block requirement.

Physical mounting uses a 22.3 mm round punch in a 22 mm nominal panel footprint. The device ships as a body-only component; the catalog listing explicitly flags that contact blocks and an illumination source (lamp or LED module) must be ordered separately. No integral lamp is cited in the seed record.

Catalog Comparison — 40mm Mushroom Family

The catalog lists several 40mm illuminated mushroom bodies within the 3SU1 series. All share identical electrical-environment and panel-cutout data. The primary differentiator is the suffix code embedded in the MPN.

Why the 40mm siblings are similar

All four MPNs (A6X30139920, A6X30139929, A6X30139927, A6X30139921) share identical catalog parameters across every spec key present in the seed record — same actuator type, same illumination class, same series, same package encapsulation, and the same panel cutout dimension. The MPN suffix variation in the Siemens 3SU1 configurableswitch catalog typically encodes colour or lens material options. Because the seed record does not include colour or lens-material fields, the exact functional delta between these four MPNs is not visible in the available data.

60mm head variant for reference

The 60mm heads carry the same illumination, mushroom-type, and series specifications but differ in head diameter (60 mm vs 40 mm). The larger head requires the same panel cutout and compatible series, so mounting hardware and contact blocks are shared across the family.

Ordering and Configuration Notes

The seed part is catalogued as an Active item in Box packaging. Configuration steps for a complete assembled operator:

1. Select the mushroom-head body (A6X30139920 or a sibling 40mm variant).
2. Add a contact block from the Siemens 3SU1 contact-block range — compatibility is confirmed with the "Contact Block(s)" requirement flag in the record.
3. Add an illumination source (lamp or LED module) — compatibility is confirmed with the "Illumination Source" requirement flag.

The RoHS3 Compliant status aligns with current EU industrial-component environmental requirements.

FAQ

What panel preparation is needed for A6X30139920? The required panel cutout is 22.3 mm round, matching the nominal 22 mm Siemens panel-mounting standard for the 3SU1 series.

Is A6X30139920 supplied with a lamp included? No. The catalog listing specifies "Requires: Contact Block(s), Illumination Source," meaning the lamp or LED element must be ordered separately from the body.

Can the 40mm mushroom body be paired with 60mm contact blocks? The 3SU1 series uses common contact-block and lamp-holder carriers across head sizes within the series. Physical compatibility of specific block types with the 40mm body should be confirmed against Siemens ordering data, as the seed record does not list dimensional or mechanical-interlock details for the contact block interface.