MMTC 1KXL / LiftMaster 02409 NEMA 4 Exterior ON-OFF Key Switch
The MMTC 1KXL is an exterior surface-mount key switch used as a keyed ON-OFF control station for commercial door, gate, and access-control equipment. It is built in a compact surface enclosure for outdoor or harsher locations where a flush-mount interior station would not be appropriate.
This part is commonly associated with LiftMaster 02409 style key switch references, but the MMTC 1KXL function is ON-OFF with a mortise cylinder. It is not the same as an open-close-stop control station, a stop-button key switch, or a Best/changeable-core version. In many operator applications, a two-position key control may not provide a stop function, so the wiring type and control purpose must be verified.
Use the 1KXL where the job calls for an exterior surface-mount ON-OFF key switch with standard/mortise cylinder operation and matching dimensions. It is often selected for gate posts, exterior commercial door locations, service entries, and controlled equipment where keyed enable/disable control is needed.
Compatible With
- Commercial overhead door operators with compatible keyed control or enable input
- Gate operators and access-control circuits that accept dry-contact keyed ON-OFF control
- Exterior wall, post, fence, or equipment-mount command locations
- Applications replacing MMTC 1KXL
- Applications cross-referencing LiftMaster 02409 when function and wiring match
- Not a substitute for 1KX open-close versions, 1KXS stop-button versions, or 1KXL-BC/1KXL-CC cylinder variants unless intentionally changing the cylinder style
Also Known As / Related Part Numbers
Features & Specifications
| Manufacturer | MMTC |
| Product Type | Exterior surface-mount key switch |
| Part Number | 1KXL |
| Related LiftMaster Number | 02409 |
| Application | Keyed ON-OFF control |
| Mounting Style | Surface mount |
| Enclosure Rating | NEMA 4 exterior style |
| Cylinder Type | Mortise / standard cylinder |
| Dimensions | 4-3/8 in H x 4-1/8 in W x 2-5/8 in D |
| Function | ON-OFF two-position key switch |
| Notes | Verify control function; not an open-close-stop station |
Technician Note
The 1KXL is easy to confuse with 1KX open-close switches and 1KXS stop-button models. Confirm the exact function required before ordering.
Before Ordering Checklist
- Confirm the original part number is 1KXL or the application calls for LiftMaster 02409 style fitment.
- Verify whether the required function is ON-OFF, open-close, hold open-close, or open-close-stop.
- Check cylinder type and keying requirements.
- Confirm exterior surface-mount enclosure dimensions and mounting location.
- Review the operator wiring diagram before connecting the switch.
Professional Advisory
Do not use a keyed ON-OFF station to replace required stop controls or monitored safety devices. For commercial operator control wiring, follow the operator manual and local safety requirements.
Important Ordering Warnings
- Some references use LiftMaster 02409 wording for surface-mount key switches. Verify the actual switch function and wiring before treating it as a direct replacement.
Product Questions & Answers
Is the 1KXL an open-close key switch?
The 1KXL is generally described as an exterior ON-OFF two-position key switch. Do not assume it is the same as open-close or open-close-stop versions.
Is this suitable for outdoor mounting?
Yes, it is an exterior surface-mount key switch in a NEMA 4 style enclosure, but it still needs proper mounting and weather-conscious wiring.
Does it use a standard cylinder?
This listing is for the standard/mortise cylinder 1KXL style. Best/equivalent and changeable-core versions are separate part numbers.
It is commonly cross-referenced with LiftMaster 02409, but the function, cylinder type, enclosure, and wiring should be verified.
Does this switch stop the door or gate?
No. It is not a stop-button station. Use a proper stop control where required by the operator wiring or safety plan.
