Provide dependable local control for commercial door and gate operators with the MMTC 3BX Exterior Three-Button Control Station.

Designed for outdoor and demanding commercial environments, the 3BX combines dedicated OPEN, CLOSE, and STOP controls in a rugged aluminum die-cast surface-mount enclosure.

The fully guarded push buttons are arranged in a compact triangular layout, while the enclosure carries NEMA 3R, NEMA 4, and NEMA 12 ratings for commercial and industrial control applications.

Key Features

• Genuine MMTC 3BX

• Exterior three-button control station

• Dedicated OPEN / CLOSE / STOP controls

• Surface-mount installation

• Rugged aluminum die-cast enclosure

• Fully guarded push buttons

• Compact triangular button arrangement

• NEMA 3R rated

• NEMA 4 rated

• NEMA 12 rated

• OPEN contact is Normally Open

• CLOSE contact is Normally Open

• STOP contact is Normally Closed

• Push-button contacts rated 6A at 125/250VAC

• Designed for compatible commercial door and gate operator control circuits

• Ideal for warehouses, loading docks, service doors, and industrial facilities

OPEN / CLOSE / STOP Operation

The MMTC 3BX provides the standard three-button control arrangement commonly required by commercial door operators.

OPEN

Contact: Normally Open

Pressing OPEN sends the appropriate open command to a compatible operator control circuit.

CLOSE

Contact: Normally Open

Pressing CLOSE provides the close command to the connected operator.

STOP

Contact: Normally Closed

The STOP circuit is normally closed and opens when the STOP button is operated.

Always verify the control-station wiring requirements of the connected operator before installation.

Fully Guarded Controls

The 3BX features fully guarded push buttons to help reduce accidental operation and provide additional physical protection around the control surfaces.

The compact triangular arrangement places the controls within easy reach while keeping the enclosure size relatively small.

Aluminum Die-Cast Enclosure

The control station uses a rugged aluminum die-cast enclosure, making it suitable for demanding commercial and industrial environments.

The enclosure provides a durable mounting point for applications such as:

• Rolling steel doors

• Commercial overhead doors

• Sectional doors

• High-lift doors

• Vertical-lift doors

• Industrial doors

• Gate operators

• Loading dock openings

NEMA 3R, 4 & 12 Rated

The MMTC 3BX carries enclosure ratings of:

NEMA 3R
NEMA 4
NEMA 12

This makes it suitable for exterior and industrial installations requiring greater environmental protection than a standard indoor control station.

Electrical Specifications

Push-Button Rating: 6A @ 125/250VAC

OPEN: Normally Open
CLOSE: Normally Open
STOP: Normally Closed

The station is intended to switch the appropriate operator control circuit.

It is not a motor starter or direct motor-power controller unless specifically approved by the operator manufacturer.

Dimensions

Manufacturer-published overall dimensions are approximately:

Height: 4-3/8"
Width: 4-1/8"
Overall Depth: 2-5/8"

The enclosure body is approximately 2-1/8" deep, with the face assembly adding approximately 1/2".

Common Applications

Ideal for:

• Rolling steel doors

• Commercial overhead doors

• Sectional garage doors

• High-lift doors

• Vertical-lift doors

• Loading dock doors

• Warehouse doors

• Industrial doors

• Commercial gate operators

• Service-bay doors

• Manufacturing facilities

• Distribution centers

Product Specifications

Brand: MMTC
Model: 3BX
Product Type: Exterior Three-Button Control Station
Controls: OPEN / CLOSE / STOP
Mounting: Surface Mount
Enclosure Material: Aluminum Die Cast
Button Protection: Fully Guarded
Button Arrangement: Triangular
NEMA Ratings: 3R, 4 & 12
Button Rating: 6A @ 125/250VAC
OPEN Contact: Normally Open
CLOSE Contact: Normally Open
STOP Contact: Normally Closed
Height: 4-3/8"
Width: 4-1/8"
Overall Depth: Approx. 2-5/8"
Application: Commercial Door & Gate Operator Control

What's Included

• MMTC 3BX control station

• OPEN push button

• CLOSE push button

• STOP push button

• Aluminum die-cast surface-mount enclosure

Not Included

• Door or gate operator

• Field wiring

• Conduit

• Motor starter

• Power supply

• Operator control board

• Keyed lockout

• Protective wet-location cover

Important Ordering Information

Before ordering, verify:

• Operator requires an OPEN / CLOSE / STOP control station

• Normally Open OPEN and CLOSE contacts are compatible

• Normally Closed STOP contact is compatible

• Operator control-circuit voltage and current

• Surface mounting is required

• NEMA enclosure requirements

• Available mounting space

3BX vs. Other MMTC Models

This listing is for the standard 3BX without a keyed lockout.

MMTC offers separate configurations for applications requiring:

• Keyed lockout

• Mortise-cylinder lockout

• BEST-style cylinder lockout

• Protective wet-location cover

• Vertical button arrangement