Product Specification Sheet APS432

Rev. 10/2013

U.L. Listed Plug-In Power Transformers

Typical Plug-in Transformer
Architects' and Engineers' Specifications
The plug-in transformer(s) shall be Alpha Communications® (MODEL NO. HERE) or approved equal. Transformer(s) shall be made of heavy duty ABS plastic, and shall be U.L. Listed for Class II indoor locations.

Transformers shall have positive screw terminal connections for the secondary wiring, and shall contain a built-in thermal fuse, to protect these transformers from overheating and igniting.

Transformers shall be secured to the electrical outlet  with a set screw for secure installation

Contractor shall observe all local and national electrical and building codes.
Alpha Communications® features a complete line of U.L.® Listed plug-in transformers to power their intercoms, video-intercoms, nurse-call systems, and various signalling systems and devices. 

The Alpha Communications® Class 2 plug-in transformers were designed for quick and easy installation in applications where pigtail-type transformers are impractical or unsightly. They are particularly suitable for use in home or office installations, or in areas where the transformer must be exposed.

All models can be secured to the electrical outlet with a set screw for secure installation, once plugged in to the wall outlet. A built-in thermal fuse protects these transformers from overheating and igniting. Secondary connections are made to convenient screw terminals. All models are U.L. listed for class II indoor wiring, and most models have a built-in LED power 'on' indicator.

Models & Specifications

T1220 120VAC primary
12VAC, 20VA secondary
120VAC primary 
12VAC, 40VA secondary
120VAC primary 
16VAC, 20VA secondary
120VAC primary 
16VAC, 40VA secondary
T2420 120VAC primary 
24VAC, 20VA secondary
120VAC primary 
24VAC, 40VA secondary
Important Note

Most models measure 3.00"W (77mm) x 4.00"H (102mm) x 2.50"D (64mm), not including electrical prongs that plug into electrical outlet.

Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.