Siemens A6X30140944 Key-Operated Switch
Trade-offs in Selecting the A6X30140944
The A6X30140944 is a keylock operator body from Siemens' 3SU1 series, shipped as a non-illuminated box-packaged component that requires separate contact blocks for completion. Several selection dimensions emerge from the on-record specifications:
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Keylock actuation vs. standard pushbutton: The keylock actuator introduces a mechanical interlock function not present in plain pushbutton bodies. This is relevant for access-control or safety-by-location scenarios within a 22mm operator station.
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O-I throw configuration: The two-position O-I (off-on) function determines which pole positions are selected. The in-catalog alternates include both O-I and I>O variants—engineers should verify the desired mechanical position sequence for their control logic.
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Contact block requirement: This operator body does not include contacts. The specification explicitly requires contact block(s), which must be ordered as a separate line item and assembled before the unit becomes functional.
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Panel cutout compatibility: The 22.3mm round panel opening is standard for 22mm industrial operators. Matching the cutout to any alternate must preserve this dimension if interchange is contemplated.
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Non-illuminated design: There is no integrated lamp or illuminated legend. If pilot-light indication is required downstream, it must be achieved through auxiliary contact feedback or a separate indicator device.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens |
| Series | 3SU1 |
| Actuator Type | Keylock |
| Illumination | Non-Illuminated |
| Encapsulation | Box |
| Panel Cutout | 22.3mm (Round) |
| Compatible Series | Siemens, 22mm |
| Requires | Contact Block(s) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Operator Assembly Context
The A6X30140944 is a front-panel operator body only. Siemens' SIRIUS 3SU1 series follows a modular philosophy: the operator (keylock, pushbutton, selector) attaches to a separately ordered contact block that mounts behind the panel. The contact block selection determines the electrical rating and contact arrangement (NO/NC) for the circuit.
Ordering codes in the 3SU1 series encode functional variants (switching angle, retention method, and lock type) through alphanumeric segments. The "BKS" designation in the title refers to the lock and throw variant within that family.
Similar Catalog Parts
The following in-catalog alternatives share identical specs across all recorded parameters and differ only in throw configuration or lock-code designation. All are Siemens 3SU1 series keylock switch bodies requiring contact blocks.
| A6X30140944 | A6X30140914 | A6X30140919 | A6X30140920 | |
|---|---|---|---|---|
| Title | KEY-OPERATED SWITCH BKS. O-I | KEY-OPERATED SWITCH O.M.R. O-I | KEY-OPERATED SWITCH O.M.R. I>O | KEY-OPERATED SWITCH O.M.R. I>O |
| Series | 3SU1 | 3SU1 | 3SU1 | 3SU1 |
| Actuator Type | Keylock | Keylock | Keylock | Keylock |
| Illumination | Non-Illuminated | Non-Illuminated | Non-Illuminated | Non-Illuminated |
| Panel Cutout | 22.3mm (Round) | 22.3mm (Round) | 22.3mm (Round) | 22.3mm (Round) |
| Requires | Contact Block(s) | Contact Block(s) | Contact Block(s) | Contact Block(s) |
| Similarity | — | 0.96 | 0.96 | 0.96 |
Why the alternates appear similar
All parts belong to the Siemens 3SU1 family of 22mm keylock switch bodies. They share the same panel cutout, non-illuminated design, box packaging, and the requirement for separate contact blocks. The differences are confined to the lock-code designation (BKS vs. O.M.R.) and throw configuration (O-I vs. I>O), which affect the mechanical position sequence. Engineers should confirm the required directionality before selecting among these variants.
FAQ
Does the A6X30140944 include contact blocks? No. The unit is the operator body only and requires contact block(s) to complete the switching function.
What panel cutout is needed for the A6X30140944? The operator requires a 22.3mm round panel cutout, consistent with the Siemens 22mm operator series.
Can the A6X30140944 be used with illuminated indicators in the same series? The A6X30140944 itself is non-illuminated. If a matching illuminated indicator is required, a separate 3SU1 illuminated operator body would need to be selected and ordered independently.