24V AC-AC Plug-In Transformer, 1.67A (40VA), Screw Terminals with Ground | AC-2416S

Part AC-2416S provides 24V AC at up to 1.67A (1670mA), with a 40VA output rating. This plug-in AC-AC transformer converts 120V AC, 60Hz input into low-voltage AC for equipment designed to use an external 24V AC supply.

Screw-terminal connections accommodate field-installed wiring rather than a fixed barrel plug, making this format useful for compatible residential equipment, commercial controls, service replacements, and OEM assemblies. A grounded three-prong plug and separate ground terminal support installations requiring a grounding connection.

Important: This supply outputs AC, not DC. Use only with equipment specifying 24V AC and an appropriate transformer rating. For indoor, dry-location use only.

Technical Specifications

• Part: AC-2416S
• Input: 120V AC, 60Hz
• Output: 24V AC
• Rated output current: 1.67A / 1670mA
• Output capacity: 40VA
• Connections: three screw terminals, including ground
• Input plug: grounded three-prong
• Use environment: indoor, dry locations
• Construction identified on the photographed label: Class 2 transformer

Common Applications & Purchasing Needs

The following are application categories for compatible 24V AC equipment, not a list of verified device matches.

• Residential and commercial irrigation controls: A potential replacement supply for irrigation controllers designed for an external 24V AC transformer. Confirm the controller's required capacity, wiring arrangement, and approved replacement requirements. This is not a universal sprinkler-controller replacement or an outdoor-rated supply.
• Security and access-control equipment: For equipment explicitly requiring 24V AC, including suitable security accessories and access-control assemblies. Many intrusion alarm panels instead require 16.5V AC, so check the panel's specified voltage before ordering.
• CCTV equipment: For cameras and associated equipment specifically rated for 24V AC input. Not a substitute for 12V DC camera supplies or PoE equipment.
• HVAC and building controls: For compatible 24V AC control circuits, relays, and other low-voltage control equipment within the transformer's capacity. Confirm installation, mounting, and manufacturer requirements; this plug-in format is not automatically interchangeable with a hardwired equipment transformer.
• Laboratory and OEM equipment: AC-DC PowerShack has supplied this power supply to laboratories and companies manufacturing tabletop ventilation systems. Consider it for service replacements and equipment assemblies whose documented input requirements match this supply. That purchasing history does not establish compatibility with every ventilation system or direct operation of a fan motor.
• Maintenance and procurement: A clearly identified replacement component for facilities teams, low-voltage installers, repair businesses, laboratories, and manufacturers sourcing a 24V AC, 40VA screw-terminal supply.

Common Replacement Compatibility

Match the original equipment's AC input voltage, required transformer capacity, terminal arrangement, grounding requirements, and installation instructions. Include every connected load and any startup or inrush requirements when checking capacity. Follow the terminal markings; the ground terminal is not a third AC power output.

A matching voltage alone does not establish compatibility. Do not use this transformer in place of a 24V DC supply, a 16.5V AC alarm transformer, or a higher-capacity transformer required by the equipment.

Frequently Asked Questions