A6X30139631 — Siemens 3SU1 Key-Operated Switch Body

The A6X30139631 is a Siemens 3SU1 modular keylock switch body sized for 22 mm panel cutouts, supplied in a box without contact blocks or illumination sources. Panel builders and controls engineers source these as the front-element of a multi-part switch assembly; a matching contact block and (when applicable) key is ordered separately.

Engineering Verification Checklist

• Confirm panel cutout is 22.3 mm round; verify space behind panel for contact-block depth.
• Verify that no illumination source is required — the body is non-illuminated.
• Confirm compatible contact blocks are ordered (3SU1 series, front-mount style).
• Check that the O-I (off-on) key function matches circuit requirements; no intermediate positions are implied by the title.
• Confirm that enclosure or cabinet depth accommodates the assembled projection of body + contact block.
• Verify ROHS3 compliance is acceptable for the target installation region.
• Ensure key removal position (O-position or I-position) matches operator access and safety-lock needs.
• Confirm mounting ring or retainer clip (standard 3SU1) is available in stock.
• Assess whether the key is included or must be ordered separately; the body alone does not ship with a key.