Intermatic 120V 21A 24-Hour Electromechanical Timer GMXST-I-120

Product Overview

The Intermatic GMXST-I-120 is an indoor electromechanical 24-hour timer with 15-minute intervals for scheduled load control. It is rated 120V and 21A with an SPDT contact configuration.

Configured for panel, surface, DIN-rail, or flush mounting and constructed of plastic, the GMXST-I-120 includes model and UPC identifiers for ordering and inventory.

Key Features

• 120V rated control voltage
• 21A switching capacity
• 24-hour dial with 15-minute intervals
• SPDT (single-pole double-throw) contact configuration
• Type 1 indoor enclosure rating; plastic construction
• Manufacturer model GMXST-I-120 and UPC 078275153226 for procurement

What this timer does

The GMXST-I-120 provides time-based switching using a mechanical 24-hour dial. Users set ON/OFF intervals in 15-minute increments to automate loads within the timer's listed electrical ratings.

• Electromechanical 24-hour clock mechanism
• 15-minute interval adjustments for daily schedules
• SPDT contacts for switching a single circuit per the schedule

Electrical ratings and switching

Use this timer when the control circuit and load fall within the listed ratings. The GMXST-I-120 is specified for 120V operation with a 21A maximum switching capacity and an SPDT contact arrangement.

• Voltage: 120V
• Amperage: 21A
• Switching configuration: SPDT (single-pole double-throw)

Mounting and enclosure

The unit is intended for indoor installations with a Type 1 enclosure rating and is constructed of plastic. It supports panel, surface, DIN-rail, or flush mounting where the device form factor and mounting provisions match the control panel design.

• Location/enclosure rating: Type 1 (indoor)
• Material: Plastic
• Mounting styles: panel, surface, DIN rail, or flush (verify physical fit)

Typical applications

The GMXST-I-120 is used for scheduled load and lighting control and other routine timed control tasks where its electrical and mounting specifications are suitable.

• Scheduled load control
• Lighting control
• Equipment cycling where within ratings
• Replacement projects matching GMXST-I-120 specifications

Technical specifications

Key procurement and product-identification details are provided for specification and ordering purposes.

• Brand: Intermatic
• Model / SKU: GMXST-I-120
• UPC: 078275153226
• Product type: Electromechanical timer
• Schedule / Interval: 24-hour, 15-minute intervals
• Unit weight: 1.607 lb
• Product category code: GM
• Master pack qty: 1

Before You Order

Confirm the model number, voltage, amperage, contact configuration, and mounting style required for your application before ordering.

• Verify GMXST-I-120 matches the electrical load (120V, 21A) and SPDT switching needs.
• Confirm physical mounting method and enclosure compatibility prior to purchase.

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Intermatic 120V 21A 24-Hour Electromechanical Timer GMXST-I-120. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.