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D
SERIES APT
WHITE BROWN
BLUEBLACK
RED BLUE
RED
BROWN
AC POWER TRANSFORMERS
20 to 150 VA, Single or Dual Hub, Circuit Breaker, UL Class 2
A
BC
PROCESS CONTROL
Dimensions in [mm]
Model
APT-40-3SN APT-50-5DB
APT-50-5SB
The Series APT AC Power Transformers provide isolated step-down to 24 VAC with
models offering VA ratings of 20, 40, 50, 75, 96, or 150 VA’s. These cost efcient
transformers are offered in single or dual 1/2˝ NPT threaded hub mounts with 8-1/2˝
18 AWG wire leads, to meet the installation requirements of a variety of building
automation and control panel applications in HVAC. All models are UL Class 2 listed.
BENEFITS/FEATURES
• Single or dual 1/2˝ NPT
• Universal supply voltage input
• With or without integral circuit breaker
APPLICATIONS
• BAS
• HVAC
MODEL CHART
Model Rating Input Voltage Output Voltage Mounting Current Protection Wiring
APT-20-0SN
APT-20-1SN
APT-40-0SN
APT-40-1DN
APT-40-1SN
APT-40-2DN
APT-40-2SN
APT-40-3SN
APT-40-5DN
Power Transformers
APT-50-1DB
APT-50-1DN
APT-50-1SB
APT-50-1SN
APT-50-2DB
APT-50-2DN
APT-50-2SB
APT-50-2SN
APT-50-5DB
APT-50-5SB
APT-75-1DB
APT-75-1SB
APT-75-2DB
APT-75-2SB
APT-75-5DB
APT-75-5SB
APT-100-1DB
APT-100-1DB-20
APT-100-1SB
APT-100-2DB
APT-100-2SB
APT-100-5DB
APT-100-5SB
APT-150-1DB
120 VAC 24 VAC
20 VA
24 VAC
20 VA
120 VAC
40 VA
24 VAC
40 VA
120 VAC
40 VA
120 VAC
40 VA
240 VAC
40 VA
240 VAC
40 VA
120/208/240/277 VAC
40 VA
120/208/240/277/480 VAC
50 VA
120 VAC
50 VA
120 VAC
50 VA
120 VAC
50 VA
120 VAC
50 VA
240 VAC
50 VA
240 VAC
50 VA
240 VAC
50 VA
240 VAC
50 VA
120/208/240/277/480 VAC
50 VA
120/208/240/277/480 VAC
75 VA
120 VAC
75 VA
120 VAC
75 VA
240 VAC
75 VA
240 VAC
75 VA
120/208/240/277/480 VAC
75 VA
120/208/240/277/480 VAC
96 VA
120 VAC
100 VA
120 VAC
96 VA
120 VAC
100 VA
240 VAC
100 VA
240 VAC
100 VA
120/208/240/277/480 VAC
100 VA
120/208/240/277/480 VAC
150 VA
120 VAC
24 VAC
Diagram A Diagram B Diagram C
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
APT-20-0SN
APT-20-1SN
APT-40-3SN
APT-40-5DN
APT-50-5DB
APT-50-5SB
APT-75-5DB
APT-75-5SB
APT-100-5DB
APT-100-5SB
APT-150-1DB
Foot mount with single hub
Foot mount with single hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with dual hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with single hub
Foot mount with dual hub
480 VAC
277 VAC
24 VAC
240 VAC
208 VAC
120 VAC
COM
A B C D E
1-31/64 [37.6]
1-31/64 [37.6]
1-61/64 [49.5]
1-61/64 [49.5]
1-13/16 [46.0]
1-13/16 [46.0]
2-13/64 [56.0]
2-13/64 [56.0]
2-39/64 [66.0]
2-39/64 [66.0]
2-33/64 [64.0]
SPECIFICATIONS
Input Voltage: See model chart.
Input Frequency: 50/60 Hz.
Output Voltage: See model chart.
Output VA Rating: 20, 40, 50, 75, 96, or 150 VA.
Mounting: Slotted foot mount with single, or dual 1/2˝ NPT hub.
Current Protection: See model chart.
Electrical Connections: Models ending in -20: 20˝ (508 mm) 18 AWG leads; All
other models: 8.5˝ (210 mm) 18 AWG leads.
Weight: See model chart.
Compliance: CE, cULus.
GRAY
YELLOW
ORANGE
RED
WHITE
BLACK BLUE
1-21/32 [41.9]
1-21/32 [41.9]
1-25/32 [45.2]
1-25/32 [45.2]
1-31/32 [50.2]
1-31/32 [50.2]
1-31/32 [50.2]
1-31/32 [50.2]
1-31/32 [50.2]
1-31/32 [50.2]
1-31/32 [50.2]
Inherent
Inherent
Inherent
Inherent
Inherent
Inherent
Inherent
Inherent
Inherent
Button circuit breaker
Inherent
Button circuit breaker
Inherent
Button circuit breaker
Inherent
Button circuit breaker
Inherent
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
BROWN
24 VAC
1-7/8 [47.5]
1-7/8 [47.5]
2-11/64 [55.0]
2-11/64 [55.0]
2-1/2 [63.5]
2-1/2 [63.5]
2-1/2 [63.5]
2-1/2 [63.5]
2-1/2 [63.5]
2-1/2 [63.5]
2-1/2 [63.5]
Diagram B
Diagram A
Diagram B
Diagram A
Diagram A
Diagram C
Diagram C
Diagram D
Diagram C
Diagram A
Diagram A
Diagram A
Diagram A
Diagram C
Diagram C
Diagram C
Diagram C
Diagram C
Diagram C
Diagram A
Diagram A
Diagram C
Diagram C
Diagram C
Diagram C
Diagram A
Diagram A
Diagram A
Diagram C
Diagram C
Diagram C
Diagram C
Diagram A
277 VAC
240 VAC
208 VAC
120 VAC
COM
E
2-17/64 [57.4]
2-17/64 [57.4]
2-43/64 [68.0]
2-3/4 [70.0]
3-7/16 [87.1]
3-7/16 [87.1]
3-53/64 [97.1]
3-53/64 [97.1]
4-1/4 [107.1]
4-1/4 [107.1]
3-9/16 [90.5]
YELLOW
ORANGE
RED
WHITE
BLACK
Diagram D
2-39/64 [66.2]
2-39/64 [66.2]
2-7/8 [73.0]
2-7/8 [73.0]
3-1/32 [77.0]
3-1/32 [77.0]
3-1/32 [77.0]
3-1/32 [77.0]
3-1/32 [77.0]
3-1/32 [77.0]
3-1/32 [77.0]
BROWN
24 VAC
BLUE
DWYER INSTRUMENTS, LLC | dwyer-inst.com360
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