Product Description
The CA728/3 is a high-quality industrial feed-through terminal block designed for safe, reliable, and efficient electrical connections in control panels, automation systems, and power distribution networks.
It is engineered to provide secure wiring, stable electrical conductivity, and long operational life in demanding industrial environments such as machinery control systems, PLC panels, and electrical distribution boards.
The CA728 series is widely used in modern panel building applications due to its compact design, strong insulation properties, and vibration-resistant construction, making it suitable for continuous industrial operation.
Working Principle
The CA728/3 works as a pass-through electrical connector, allowing current or signal flow from one side of the terminal to the other through an internal conductive path.
When a conductor is inserted and tightened, the internal clamp system applies strong mechanical pressure, ensuring stable electrical contact with low resistance.
This prevents loosening due to vibration, heat expansion, or long-term usage, ensuring safe and continuous electrical performance in industrial systems.
Key Features
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High-performance industrial feed-through terminal block
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Strong and stable electrical connection system
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Compact modular DIN rail mounting design
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High vibration and shock resistance
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Flame-retardant insulating housing
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Low contact resistance for efficient conductivity
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Easy installation and wiring system
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Modular and expandable design
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Suitable for continuous industrial duty
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Long service life with minimal maintenance
Technical Specifications
General Information
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Model: CA728/3
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Product Type: Industrial Feed-Through Terminal Block
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Application: Electrical connection in control panels and automation systems
Electrical Specifications
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Rated Voltage: Up to 800V AC/DC
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Rated Current: 32A (depending on conductor size and installation conditions)
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Impulse Withstand Voltage: 8kV
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Overvoltage Category: III
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Pollution Degree: 3
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Frequency: 50/60 Hz
Conductor Specifications
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Solid Conductor Range: 0.5 mm² to 6 mm²
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Stranded Conductor Range: 0.5 mm² to 4 mm²
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Flexible Conductor: Supported with ferrule
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Connection Type: Screw clamp feed-through system
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Wire Entry Type: Front entry wiring
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Stripping Length: 8–10 mm
Mechanical Specifications
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Mounting Type: DIN Rail 35 mm (NS 35 standard)
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Housing Material: Polyamide PA66 (Flame Retardant grade)
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Flammability Rating: UL94 V0 equivalent
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Contact Material: High-conductivity copper alloy
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Design Type: Modular, stackable structure
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Color: Grey / Blue industrial standard
Environmental Specifications
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Operating Temperature: -40°C to +85°C
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Continuous Operating Temperature: Up to +70°C
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Storage Temperature: -40°C to +90°C
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Humidity Resistance: Suitable for industrial environments
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Vibration Resistance: High resistance for machinery applications
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Corrosion Resistance: Standard industrial protection level
Safety Features
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High dielectric insulation strength
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Flame-retardant housing material
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Secure screw clamp connection system
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Short-circuit resistant design
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Finger-safe terminal structure
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IEC-style industrial safety compliance
Design Features
The CA728/3 is designed with a compact modular structure, allowing multiple terminals to be installed side-by-side on DIN rails without wasting panel space.
Its screw clamp mechanism ensures strong grip and consistent electrical contact pressure, even in environments with vibration or mechanical stress.
The housing is made from high-grade flame-retardant material, ensuring safe operation inside electrical control cabinets.
Applications
The CA728/3 is widely used in industrial and commercial electrical systems:
1. Industrial Automation
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PLC control panels
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Machine automation systems
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Robotics wiring systems
2. Electrical Distribution
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Power distribution boards
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Control cabinets
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Sub-panel wiring systems
3. Manufacturing Industry
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Production line machinery
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Motor control centers (MCC)
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Process control equipment
4. Infrastructure Systems
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HVAC control systems
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Building automation systems
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Utility control systems
5. Electrical Engineering Systems
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Signal distribution systems
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Instrumentation wiring
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Control circuit interconnections
Advantages
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Ensures stable and reliable electrical connection
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Reduces wiring failures in industrial environments
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High durability under continuous operation
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Easy installation and replacement
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Space-saving modular design
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Improves panel wiring efficiency
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Resistant to vibration and mechanical stress
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Long operational life with minimal maintenance
Installation Guidelines
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Mount on standard 35 mm DIN rail
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Ensure correct conductor stripping length before insertion
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Tighten screws properly to recommended torque
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Avoid exceeding rated conductor capacity
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Maintain proper spacing in control panels
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Use end clamps for secure terminal positioning
Maintenance Guidelines
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Periodic inspection of screw tightness
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Check for dust or contamination buildup
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Ensure proper ventilation inside panel
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Replace damaged terminals immediately
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Suitable for low-maintenance long-term operation
Engineering Summary
The CA728/3 is a reliable industrial feed-through terminal block designed for safe and efficient electrical wiring in control panels and automation systems. Its strong construction, high insulation performance, and modular design make it ideal for modern industrial applications requiring durability and safety.
