Siemens A6X30136120 Emergency Stop Pushbutton
3SU1 Series: Emergency Stop Actuator and Catalog Comparison
The prefix A6X301361 places this part within the Siemens 3SU1 22mm operator station catalog — a modular industrial switch series where the actuator head is ordered separately from the contact block. The title "EM. STOP MUSHROOM PUSHBUTTON. 40" specifies a 40mm-diameter mushroom-head actuator designed for emergency stop functions in machine control panels.
The 3SU1 series supports mixed actuator types (pushbutton, keylock, twin) on a common 22.3mm panel cutout. All parts in this comparison share the same form factor and require separate contact block procurement.
Parameter Summary
| Attribute | Value |
|---|---|
| Series | 3SU1 |
| Actuator Type | E-Stop, Round |
| Head Size | 40mm (mushroom) |
| Illumination | Non-Illuminated |
| Panel Cutout | 22.3mm (Round) |
| Requires | Contact Block(s) |
| Compatible Series | Siemens, 22mm |
| Encapsulation | Box |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Similar Catalog Parts (Side-by-Side Screening)
The table below lists in-catalog peers sharing all spec keys with A6X30136120. Qualification for a specific application remains the responsibility of the buyer and engineering team.
| MPN | Title | Actuator Type | Similarity |
|---|---|---|---|
| A6X30136120 | EM. STOP MUSHROOM PUSHBUTTON. 40 | E-Stop, Round | — |
| A6X30136620 | TWIN PUSHBUTTON. WHITE. BLACK | Pushbutton, Oval (Dual) | 0.9282 |
| A6X30136420 | KEY-OPERATED SWITCH BKS. O-I | Keylock | 0.9282 |
| A6X30136157 | MUSHROOM PUSHBUTTON. 40MM. BLUE | Pushbutton, Mushroom | 0.9164 |
| A6X30136312 | TWIN PUSHBUTTON. WHITE. BLACK | Pushbutton, Oval (Dual) | 0.9164 |
| A6X30136870 | KEY-OPERATED SWITCH RONIS. O-I | Keylock | 0.9164 |
| A6X30136460 | TWIN PUSHBUTTON. WHITE. BLACK | Pushbutton, Oval (Dual) | 0.9164 |
| A6X30136780 | KEY-OPERATED SWITCH RONIS. I-O-I | Keylock | 0.9164 |
| A6X30136221 | MUSHROOM PUSHBUTTON. 40MM. BLACK | Pushbutton, Mushroom | 0.9164 |
Why These Are Catalog-Peer Comparisons
All eight alternates share identical spec keys: same series (3SU1), same 22.3mm round panel cutout, same non-illuminated construction, same box packaging, and same requirement for separate contact blocks. The numerical similarity reflects shared parametric structure across the Siemens 22mm configurable switch line, not interchangeability.
- A6X30136157 / A6X30136221: Both are mushroom pushbuttons within the 3SU1 family. A6X30136157 adds a blue color variant while A6X30136221 matches the black head color of the primary. Actuator type differs between the two — one is listed as "E-Stop, Round" while the mushroom entries are "Pushbutton, Mushroom." This distinction in function class means the emergency stop variant carries specific mechanical latching requirements that plain mushroom pushbuttons do not.
- A6X30136620 / A6X30136312 / A6X30136460: Twin pushbuttons with oval (dual) actuators share the same panel cutout and contact block requirement but introduce a two-position human-machine interface format. Actuator type and panel integration differ from the single mushroom head.
- A6X30136420 / A6X30136870 / A6X30136780: Keylock variants retain the same form factor and panel requirements but substitute a key-operated switching mechanism for the mushroom head. The "O-I" and "I-O-I" position counts differ among these three keylock versions.
Application Context
This actuator is a human-machine interface device in the emergency stop circuit path. The modular design (separate actuator head from contact block) allows the panel builder to select contact block ratings independently, supporting coordination in safety-related control circuits. The 40mm mushroom head provides a larger target surface compared to standard 22mm pushbuttons, which is a physical characteristic relevant to accessibility requirements in machinery protection zones.
The non-illuminated design reflects a design choice not to integrate a pilot light into the head. Illumination decisions for status indication fall to external pilot devices or contact-block-driven indicators elsewhere in the panel.
Selection Considerations
- Verify that the selected contact block(s) provide the appropriate ratings for the target circuit voltage and current.
- Emergency stop pushbuttons in safety-rated applications typically require NC (normally closed) contact arrangements; the contact block procurement must reflect that requirement.
- Panel depth and rear clearance are not listed in the catalog records; confirm space availability against the enclosure design.
- The 22.3mm round cutout applies across all 3SU1 variants in this comparison, so actuator swapping does not require panel modification.