At Zhejiang SIPUN Electric Co., Ltd, we specialize in engineering high-performance electrical connection solutions tailored to the evolving needs of industrial automation, control systems, and power distribution applications. Our SUK series double-layer terminal blocks, including the SUK-2.5/2-2D Double-Layer Diode Terminal Block and SUK-2.5/2-2X Double-Layer Indicator Light Terminal Block, represent our commitment to space efficiency, safety, and customizable design for modern electrical cabinets.
1. SUK-2.5/2-2D Double-Layer Diode Terminal Block
Core Function & Application Scenarios
The SUK-2.5/2-2D is a space-saving double-layer terminal block integrated with a built-in diode (standard model: 1N4007, 1000V reverse voltage, 1A maximum current), designed to enable unidirectional current flow in electrical circuits. Its core function is to prevent reverse current, protect sensitive electronic components, and isolate circuit paths—critical for applications where current direction control is mandatory.
This terminal block is ideal for:
- Control circuit isolation: Preventing backflow of current in relay, PLC, and sensor circuits, avoiding signal interference and component damage.
- Motor control systems: Isolating control and power circuits in motor starter assemblies, ensuring safe and reliable operation.
- Battery and power supply systems: Protecting charging circuits from reverse polarity damage, extending the lifespan of power equipment.
- Industrial automation panels: Maximizing cabinet space by combining two circuit layers in a single terminal footprint, reducing overall installation volume.
Key Product Advantages
- Space-efficient double-layer design: Reduces cabinet space by 50% compared to traditional single-layer terminal blocks, optimizing layout for compact electrical enclosures.
- Compliance with international standards: Fully meets IEC 60947-7-1, ensuring global compatibility and safety certification.
- Flexible wiring options: Supports screw, spring, and push-in (Push-in) connection methods, compatible with 0.2-10mm² wire gauges for diverse application needs.
- DIN rail mountable: Compatible with TH35 and G32 DIN rails for quick, standardized installation in industrial control panels.
- Complete insulating accessories: Equipped with partition plates, compensation plates, and spacers to enhance electrical safety and prevent short circuits.
2. SUK-2.5/2-2X Double-Layer Indicator Light Terminal Block
Core Function & Application Scenarios
The SUK-2.5/2-2X is a double-layer terminal block integrated with a built-in LED indicator light, designed to provide real-time visual status monitoring of electrical circuits. Its core function is to instantly alert operators to circuit energization, fault conditions, or operational status, eliminating the need for manual testing and improving maintenance efficiency.
This terminal block is ideal for:
- Power distribution panels: Visually confirming live circuit status, reducing the risk of accidental contact with energized components during maintenance.
- Industrial control systems: Monitoring the operational status of relays, solenoid valves, and actuators, enabling quick fault diagnosis and troubleshooting.
- Machine automation equipment: Providing visual feedback for machine operation, ensuring operators can identify system status at a glance.
- Building electrical systems: Monitoring lighting, HVAC, and security circuits, simplifying routine inspection and maintenance.
Key Product Advantages
- Real-time visual monitoring: Bright LED indicator (standard red, customizable colors available) provides clear, instant circuit status feedback, improving operational safety and efficiency.
- Double-layer space-saving design: Same compact footprint as the SUK-2.5/2-2D, ideal for space-constrained electrical cabinets.
- High reliability: Built with high-quality LED components and durable contact materials, ensuring long-term stable operation in industrial environments.
- Customizable configurations: Supports different LED colors, voltage ratings, and connection methods to match specific project requirements.
- Full safety compliance: Meets IEC 60947-7-1 international standards, with complete insulating accessories for enhanced electrical safety.
Customization Services: Tailored Solutions for Your Unique Needs
At Zhejiang SIPUN Electric, we understand that every electrical project has unique requirements. That’s why we offer full customization services for both diode terminal blocks and indicator light terminal blocks:
- Diode customization: We support a wide range of diode models, voltage ratings, current capacities, and circuit configurations to meet specific reverse current protection needs.
- Indicator light customization: Custom LED colors (red, green, yellow, blue), voltage ratings (AC/DC), and brightness levels for tailored status monitoring.
- Wiring and connection customization: Options for screw, spring, or push-in connection methods, compatible with various wire gauges and installation environments.
- Mechanical customization: Custom terminal sizes, layer configurations, and accessory kits to fit unique cabinet layouts and application scenarios.
Why Choose Zhejiang SIPUN Electric?
With years of expertise in electrical connection technology, Zhejiang SIPUN Electric is a trusted partner for industrial clients worldwide. Our SUK series terminal blocks combine cutting-edge design, rigorous quality control, and flexible customization to deliver reliable, efficient solutions for your electrical systems. Whether you need standard off-the-shelf products or fully customized terminal blocks, our engineering team is dedicated to meeting your exact specifications.
For inquiries about our SUK series terminal blocks or customization services, please contact our sales team today.
Post time: Mar-31-2026