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JBK3 AC HVAC Control Transformer
Product Overview
The JBK3 Series AC HVAC Control Transformer is specially designed for HVAC systems, providing stable and reliable 24V control power for thermostats, solenoid valves, fan control boards, relays, and other low-voltage HVAC components.
As a critical power supply component in heating, ventilation, and air conditioning systems, the JBK3 transformer delivers stable voltage output, reliable long-term performance, and strong environmental adaptability for residential and commercial HVAC applications.
Key Features
100% Copper Winding for Stable Operation
The transformer adopts precision-wound pure copper enameled wire with a full-rated power design for stable and reliable long-term operation.
Advantages:
Low temperature rise
Excellent conductivity
Strong anti-aging performance
Stable voltage output
Reduced the voltage fluctuation impact
Long service life
The tightly wound copper coil improves operational stability and power supply reliability for HVAC control systems.
High-Quality Silicon Steel Core
The transformer uses premium E-type silicon steel laminations with tightly stacked construction for efficient magnetic performance and low core loss.
Benefits:
Fast heat dissipation
Low operating noise
Reduced heat generation
High efficiency
Extended service life
Suitable for continuous HVAC operation
The optimized core structure ensures stable operation under long-term running conditions.
Multiple Voltage & Capacity Custom Options
Flexible Voltage Configurations
The JBK3 Series supports multiple input and output voltage combinations, including:
Input Voltage:
120V
220V
240V
380V
Output Voltage:
12V
24V
36V
110V
220V
Popular HVAC models such as:
120V to 24V
240V to 24V
They are widely used in North American and international HVAC systems.
Wide Capacity Range
Available rated capacities:
40VA to 15000VA
Popular models such as 40VA and 75VA are ideal for:
Single thermostats
Multiple thermostats
Solenoid valves
Fan control circuits
HVAC relay systems
Designed for Demanding HVAC Environments
The JBK3 transformer is designed to operate reliably under complex HVAC working conditions.
Operating conditions:
Ambient temperature: -30℃ to +40℃
Relative humidity: ≤85%
Frequency: 50/60Hz
Features:
Excellent moisture resistance
Stable operation under temperature fluctuations
Suitable for air conditioning units and heating systems
Compatible with export and retrofit projects
Strong Overload Capability
The transformer supports short-term overload capacity up to 1.8 times rated power for 60 seconds, helping handle startup inrush current from HVAC equipment.
Advantages:
Improved startup reliability
Better system stability
Reduced voltage drop during startup
Enhanced Safety & Easy Installation
High-Quality Wiring Terminals
The transformer adopts pure copper conductive terminals for a stable electrical connection.
Benefits:
Reliable contact performance
Reduced sparking risk
Improved electrical safety
Easy wiring installation
Flame-Retardant Structure
The housing uses flame-retardant materials to improve operational safety in HVAC systems.
Reinforced Mounting Bracket
Features include:
Thickened mounting bracket
Oval mounting holes
Stable installation
Resistance to deformation
Suitable for:
HVAC units
Control cabinets
Air conditioning systems
Boiler thermostat systems
Technical Specifications
| Item | Specification |
|---|---|
| Model | JBK3 Series |
| Type | AC HVAC Control Transformer |
| Phase | Single Phase |
| Input Voltage | 120V / 220V / 240V / 380V |
| Output Voltage | 12V / 24V / 36V / 110V / 220V |
| Frequency | 50/60Hz |
| Rated Capacity | 40VA-15000VA |
| Winding Material | 100% Copper |
| Core Material | E-type Silicon Steel |
| Overload Capacity | 1.8× rated power / 60s |
| Operating Temperature | -30℃ ~ +40℃ |
| Relative Humidity | ≤85% |
| Cooling Method | Natural Air Cooling |
| Installation Type | Base Mounting |
| Custom Voltage | Supported |
Typical Applications
The JBK3 HVAC Control Transformer is widely used in:
Residential HVAC systems
Commercial air conditioning units
Thermostat systems
Boiler control systems
Fan control circuits
Solenoid valve systems
HVAC control panels
Heating and ventilation equipment
Why Choose JBK3 HVAC Control Transformers?
Genuine 100% copper winding
Stable 24V HVAC control power
High-efficiency silicon steel core
Wide voltage customization options
Strong overload capability
Reliable operation under harsh environments
Flame-retardant safety design
Suitable for residential and commercial HVAC systems
Custom Service
We provide custom solutions, including:
Input/output voltage
VA capacity
Terminal configuration
Mounting structure
OEM branding
HVAC project customization
Contact us for technical support, product drawings, and a quotation.
