Product Specification Sheet APS472

Rev. 07/2013

SF339 Emergency Push Station (Mushroom-Style Button)

Architects' And Engineers' Specifications

Emergency push station(s) shall be Alpha Communications®/TekTone SF339 or approved equal. Operation of emergency signals shall be accomplished by pushing the RED Mushroom-style Button.

The Red "CALL PLACED" L.E.D. indicator shall flash to assure the patient that the call has been placed.

The Emergency signal shall be cancelled by turning the mushroom-style button clockwise.

Switching mechanism shall consist of a reliable DPDT switch.

Contractor shall observe all local and national electrical codes.

SF339 Emergency Push Station

The Alpha Communications® SF339 Emergency Push Station includes a locking Mushroom-Style switch, and is used in any area where activation of an emergency station is required. All electronic components are mounted on a circuit board, including a reliable industry-proven DPDT switch for circuit initiation. The DPDT switch and the indicator LED are completely sealed in plastic.

The SF339 may be used as an emergency station or as a staffassist emergency call station. The large mushroom-style button is easily activated, so that calls may be placed using an elbow, shoulder, etc., when using the hands is inconvenient or inappropriate. Calls are cancelled by turning the mushroom-style button clockwise.

Dome light and system annunciation vary according to the manner in which the SF339 is connected, and which system it is used with.

The SF339 is typically used with the HC345C, NC205, NC110A, NC110N, NC150N, NC150R, NC200N and NC300 systems.

The SF339 is not designed for use in a shower or 'moist' environment(s).

  • Simple and flexible operation
  • Red "Call-Placed" L.E.D. indicator
  • Call cancel at point of origin only
  • Flame retardant type ABS plastic in White color
  • 0.945" diameter (24mm) RED Mushroom-Style Button

(including mushroom button)

Height: 4.50" (114mm)
Width: 2.81" (72mm)
Depth: 1.63" (41mm)
Projects: 1.38" (35mm) from mounting surface

Electronic components and DPDT switch, circuit board mounted. Flame retardant ABS plastic faceplate (White).
Plug-in connector
Steel City #52171 box with Steel City #52C14 plaster ring, or Alpha Communications® Model IH358 box with IH357 ring or EXACT EQUAL. Vertical mount.

Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
TOLL-FREE: (800) 666-4800 • Web: • Email:
Copyright© 1998-2020 Alpha Communications® - All Rights Reserved.
Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.