Product Description
The CA728/4 is a high-quality industrial feed-through terminal block designed for safe, stable, and efficient electrical wiring in control panels, automation systems, and power distribution applications.
It is engineered to handle multi-point wiring connections in a compact space, making it ideal for modern industrial panels where wiring density and reliability are critical.
The CA728 series is widely used in PLC control systems, machine automation panels, motor control centers (MCC), and electrical distribution boards, where stable electrical performance and long service life are required.
Its robust construction ensures low contact resistance, high insulation strength, and vibration-resistant operation, making it suitable for continuous industrial environments.
Working Principle
The CA728/4 operates as a feed-through terminal block, allowing electrical current or signals to pass from one side to the other through a secure internal conductive system.
When a conductor is inserted and tightened, the internal clamp mechanism applies uniform pressure on the wire, ensuring a strong mechanical grip and stable electrical connection.
This design prevents loosening due to vibration, temperature variation, or mechanical stress, ensuring safe and uninterrupted electrical transmission in industrial systems.
Key Features
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High-density industrial feed-through terminal block
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Compact design for multi-wire wiring applications
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Strong and stable electrical connection system
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DIN rail mounting compatible structure
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Flame-retardant housing material
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High vibration and shock resistance
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Low contact resistance for efficient conductivity
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Easy installation and maintenance
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Modular and stackable design
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Suitable for continuous industrial operation
Technical Specifications
General Information
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Model: CA728/4
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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 concept
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IEC-style industrial safety compliance
Design Features
The CA728/4 is designed with a compact and high-density wiring structure, allowing multiple connections in limited control panel space.
Its screw clamp system ensures strong mechanical grip and stable electrical contact pressure, even in environments with vibration or continuous industrial load.
The modular design allows easy expansion and organized wiring layout, making it ideal for professional panel builders.
Applications
The CA728/4 is widely used in industrial and commercial 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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Industrial process systems
4. Infrastructure Systems
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HVAC control systems
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Building automation systems
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Utility control panels
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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High-density wiring capability
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Ensures stable and reliable electrical connection
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Reduces wiring errors in complex panels
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High durability in industrial environments
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Easy installation and replacement
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Space-saving modular design
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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 proper conductor stripping before insertion
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Tighten screws to recommended torque
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Avoid overloading beyond rated conductor capacity
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Maintain proper spacing for heat dissipation
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Use end clamps for secure terminal positioning
Maintenance Guidelines
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Periodically inspect 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 industrial operation
Engineering Summary
The CA728/4 is a reliable industrial feed-through terminal block designed for high-density wiring applications. Its strong construction, flame-retardant housing, and stable electrical performance make it ideal for modern industrial control systems requiring efficiency, safety, and compact wiring solutions.
