Spec Sheet

SNT333S Switching Power Supply (QwikBUS™ Series)
Product Specification Sheet
APS1162
Rev. 09/2020
ARCHIT ECT S' AND ENGINEERS'
SPECIFICAT IONS
The Switching Power Supply unit(s) shall be Alpha
Communications® / S.T.R.™ QwikBUS™ model
SNT333S, or approved equal. The SNT333S shall be
built into a rugged high impact ABS plastic case, and
shall be powered a contractor supplied power cord.
Contractor shall furnish the proper C333-2 connecting
cable to connect to the SP333 intelligent controller
and to the model T1240 (12VAC) power transformer.
Low voltage wiring shall be used and positive screw
terminal and plug-in connectors shall be provided for
installation wiring. The SNT333S shall be mountable
right to the surface of the wall or in a customer-
supplied junction box cabinet (model# CEC152 or
equivalent).
Contractor shall observe all local and national electrical
and building codes.
SNT 333S SWITCHING POWER SUPPLY
The Alpha Communications® / S.T.R.™ SNT333S
Switching Power Supply is used only with the 2-wire
QwikBUS™ series intercom and/or video-intercom
systems. The SNT333S provides the regulated 24VDC
power needed to control the SP333 QwikBUS™
intelligent controller.
E a c h SNT333S gets its power from a customer
supplied power cord, and will operate on an input of
100 to 240VAC.
Each 2-wire QwikBUS™ system requires a minimum of
one SNT333S Switching Power Supply.
FEAT URES
Easily Installs Right on Finished Wall Surface or
i n Optional Junction Box (model# CEC152 or
equivalent)
Operates on Safe Low-Voltage Class II Wiring
Positive Screw Terminal and Plug-in Connectors
SPECIFICAT IONS
Dimensions:
Height: 3.75" (96mm)
Width: 1.34" (35mm)
Depth: 2.30" (59mm) from mounting
surface
Construction:
High impact ABS plastic case
(typically White or Grey)
Connections:
Positive screw terminal and plug-in
connectors
Mounting:
Surface-mounted (usually installed
near the SP333S intelligent
controller and other system central
equipment).
Temp.
Range:
0°C - 50°C
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: [phone] • Fax: [phone]
TOLL-FREE: [phone] • Web: www.alphacommunications.com • Email: [e-mail]
C opyright© 1998-2020 Alpha C ommunications - All Rights Reserved.
Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.
®