MMTC 3B4X-SS Stainless Steel Three Button Control Station
The MMTC 3B4X-SS is a stainless steel NEMA 4X exterior three-button control station for OPEN, CLOSE, and STOP commands. It is intended for locations where a standard enclosure may not be enough, such as corrosive, wet, washdown, coastal, or high-exposure commercial environments. The stainless steel enclosure also makes it useful where a more durable or cleaner exterior finish is preferred.
This station is normally used as a remote command point for compatible commercial door operators and automatic gate operators. It does not replace the operator control board; it sends button commands into the operator's control circuit. Because different operators handle STOP and common circuits differently, the station should be matched to the wiring diagram and not selected only by the number of buttons.
The 3B4X-SS is closely related to other MMTC three-button surface-mount stations, but the stainless steel enclosure and vertical button arrangement make it a separate part. It should not be assumed interchangeable with Rosite, standard metal, lockout, or flush-mount versions without checking dimensions, enclosure requirements, and conduit layout.
Compatible With
This product is commonly used with the following applications when the operator control circuit, wiring terminals, enclosure needs, and site layout match the part being replaced or added:
- Commercial overhead door operators with separate low-voltage OPEN, CLOSE, STOP, and COMMON terminals, when the button functions match.
- Automatic gate operators and access control panels that accept momentary dry-contact command inputs, when the circuit design supports a remote control station.
- Industrial door, rolling door, grille, parking, and service-door control circuits that require a surface-mount field station.
- Replacement applications where the original MMTC control station uses the same button count, enclosure rating, mounting style, contact arrangement, and wiring layout.
- Commonly associated with operator brands that use external three-button stations, including LiftMaster, Linear, Genie, Overhead Door, Manaras, DoorKing, HySecurity, and similar commercial operator platforms, when confirmed by the wiring diagram.
- Exterior OPEN-CLOSE-STOP applications where stainless steel NEMA 4X housing is desired.
- Washdown, coastal, industrial, and corrosive environments requiring a more robust enclosure than a typical indoor station.
Because control stations and accessory devices are wired into the operator control circuit, verify the terminal labels, contact type, voltage rating, enclosure rating, and required command functions before ordering.
Features and Specifications
| Manufacturer | MMTC |
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| Product Type | Exterior stainless steel three button surface mount control station |
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| Part Number | 3B4X-SS |
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| Button Function | OPEN-CLOSE-STOP |
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| Enclosure Rating | NEMA 4X |
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| Enclosure Material / Style | Stainless steel enclosure |
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| Button Layout | Vertical |
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| Mounting Style | Surface mount |
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| Dimensions | H=6-3/4 in, W=3-1/2 in, D=3-1/2 in |
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| Application | Commercial door and gate operator command station |
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| Notes | Confirm enclosure size and conduit entry before replacing a different 3-button station. |
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Also Known As / Related Part Numbers
Technician Note
Choose 3B4X-SS when the project specifically calls for a stainless steel exterior three-button station. It is not the same housing as the Rosite 3B4X or the lockout 3B4XL.
Before Ordering Checklist
- Match the MMTC part number and button function to the existing station or wiring diagram.
- Confirm whether the site needs two-button OPEN-CLOSE or three-button OPEN-CLOSE-STOP control.
- Verify enclosure type: interior NEMA 1, exterior NEMA 4, exterior/corrosion-resistant NEMA 4X, or specialty enclosure.
- Confirm contact requirements, especially normally open command buttons and normally closed stop circuits where applicable.
- Check mounting space, conduit entry, back box, and whether a lockout/keyed function is required.
- Confirm that the larger stainless steel enclosure size fits the mounting location.
Professional Advisory
Installation should follow the operator manufacturer's wiring diagram and all applicable safety requirements. Do not bypass stop circuits, monitored safety devices, entrapment protection, or required warning devices. If the operator uses high voltage wiring or the control circuit is not clearly identified, have the work performed by a qualified gate or commercial door technician.
Product Questions and Answers
What is different about the 3B4X-SS?
It provides the same basic OPEN-CLOSE-STOP control style as a three-button station, but it uses a stainless steel NEMA 4X exterior enclosure.
Is it the same as the MMTC 3B4X?
No. The 3B4X-SS is the stainless steel version with different enclosure dimensions and button layout. The 3B4X uses a Rosite enclosure.
Where is stainless steel useful?
It is useful in coastal, washdown, corrosive, and higher-exposure commercial areas where a stronger exterior enclosure is preferred.
Does this station include a lockout key?
No. This item is a three-button station without lockout. Use a lockout model when the operator station must be disabled by key.
Can it be wired to a gate operator?
Yes, when the gate operator has compatible low-voltage command terminals and the wiring diagram supports a remote OPEN-CLOSE-STOP station.
