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Honeywell General Purpose Transformers

Honeywell AT120

General Purpose Transformer . . . more information.

Honeywell AT140

General Purpose Transformer . . . more information.

Honeywell AT150

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 50 VA . . . more information.

Honeywell AT175

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 75 VA . . . more information.

Honeywell AT20

NEMA Standard Universal Stripped-Down Transformer . . . more information.

Honeywell AT40

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 40 VA, NEMA rated . . . more information.

Honeywell AT72

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 40 VA, NEMA rated . . . more information.

Honeywell AT87

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 50 VA, NEMA rated . . . more information.

Honeywell AT88

Convert line voltage to 24 volts needed for thermostats and other HVAC controls - 75 VA . . . more information.

Honeywell General Purpose Transformers are available in the following configurations. Include the primary and secondary voltage ratings, frequency, mounting and NEMA in searches at KSCdirect.com to quickly locate your Honeywell General Purpose Transformer:

Electrical Ratings -Primary Voltage

100 V 120 Vac

240 Vac 277 Vac

480 Vac 120 VAc, 240 Vac

208 Vac, 240 Vac 240 Vac, 480 Vac

277 Vac, 480 Vac 220 Vac 50 Hz with 40 VA

208 Vac, 240 Vac with 40 VA output rating; 120 Vac, 208 Vac, 240 Vac

120 Vac, 240 Vac, 277 Vac 120 Vac, 240 Vac, 480 Vac

208 Vac, 277 Vac, 480 Vac

Electrical Ratings -Secondary Voltage

17; 24 V.O.C. 24V.O.C.

26.5 V.O.C. 27 V.O.C.

27.5 V.O.C.

Frequency

50 Hz 50/60 Hz

60 Hz

Mounting

4 x 4 in. plate mounted without protruding into junction box. 4x4 in. plate-mounted

4x4 in. plate-mounted, protruding into junction box. Can be foot mounted, plate mounted on 4 x 4 in., 4 in. octagon, or 2 x 4 in. electrical boxes (transformer all above plate or 3/4 above plate); or clamp mounted via a junction box knockout.

Channel frame mounting allows for direct, horizontal or vertical foot mounting. Channel Frame Mounting allows for Direct, Horizontal, or Vertical Foot mounting.

Conduit clamp Foot mounted metal box with knockouts for 1/2 in. conduit.

Foot mounted or 4x4 in plate. Foot mounted with .21 dia mounting holes, 3.562 center to center

Foot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box , clamp mounted using outlet box knockout, or panel mounted Foot mounted, plate mounted on 2x4 in. or 4x4 in. outlet box, clamp mounted using outlet box knockout, or panel mounted

Foot mounting on side of transformer with .187 dia mounting holes, 2.81 center to center for american air filter Foot or conduit mounted

Foot-mounted Includes 1/2 14 NPSM conduit connector and lock nut for mounting on plate or panel (not included) with 7/8 in. knockout, and feet for surface mount.

integral 4 x 4 in. mounting plate fits 2 x 4 in. or 4 x 4 in. outlet box. Multi-mounting

Panel mounted with two No. 8 screws (not included).

NEMA Rating

NEMA type B NEMA type D

NEMA type E No