Dwyer Instruments SERIES APT Catalog Page
D
SERIES APT
AC POWER TRANSFORMERS
20 VA to 150 VA, Single or Dual Hub, Circuit Breaker, UL Class 2
A
PROCESS CONTROL
APT-40-3SN
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.
FEATURES/BENEFITS
• Single or dual 1/2˝ NPT
• Universal supply voltage input
• With or without integral circuit breaker
APPLICATIONS
• BAS
• HVAC
Power Transformers
APT-50-5DB
BC
Dimensions in [mm]
Model
APT-20-0SN
APT-20-1SN
APT-40-3SN
APT-40-5DN
APT-50-5SB
APT-50-5DB
APT-75-5SB
APT-75-5DB
APT-100-5SB
APT-100-5DB
APT-150-1DB
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.
Agency Approvals: CE, cULus.
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)
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)
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)
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)
MODEL CHART
Model Rating Input Voltage Output Voltage Mounting Current Protection Wiring Weight
APT-20-0SN
APT-20-1SN
APT-40-3SN
APT-40-5DN
APT-50-5SB
APT-50-5DB
APT-75-5SB
APT-75-5DB
APT-100-5SB
APT-100-5DB
APT-150-1DB
WHITE BROWN
120VAC 24VAC
20 VA
20 VA
40 VA
40 VA
50 VA
50 VA
75 VA
75 VA
100 VA
100 VA
150 VA
Diagram A Diagram B Diagram C Diagram D
24 VAC
120 VAC
120/208/240/277 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120/208/240/277/480 VAC
120 VAC
BLUEBLACK
RED
24VAC
RED BLUE
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
24 VAC
BROWN
24VAC
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 dual hub
Foot mount with single hub
Foot mount with dual hub
Foot mount with dual hub
480VAC
277VAC
240VAC
208VAC
120VAC
COM
GRAY
YELLOW
ORANGE
RED
WHITE
BLACK BLUE
Inherent
Inherent
Internal fuse
Internal fuse
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
Button circuit breaker
BROWN
24VAC
277VAC
240VAC
208VAC
120VAC
COM
Diagram B
Diagram A
Diagram D
Diagram C
Diagram C
Diagram C
Diagram C
Diagram C
Diagram C
Diagram C
Diagram A
YELLOW
ORANGE
RED
WHITE
BLACK
1.25 lb (0.57 kg)
1.29 lb (0.59 kg)
2.07 lb (0.94 kg)
2.29 lb (1.04 kg)
2.69 lb (1.22 kg)
2.73 lb (1.24 kg)
3.60 lb (1.63 kg)
3.62 lb (1.64 kg)
4.03 lb (1.83 kg)
4.05 lb (1.84 kg)
4.98 lb (2.26 kg)
DWYER INSTRUMENTS, INC. | 360
BROWN
24VAC
BLUE
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