Product Overview
The STS2 series multipurpose distribution terminal blocks are high-current, high-reliability power distribution solutions specially designed for low-voltage power distribution systems, complete electrical equipment, combined electrical boxes, and industrial automation control cabinets. Widely used in power transmission, busbar transitions, grounding/neutral circuits, and equipotential bonding applications, they serve as the core connection components for implementing “one-in, multiple-out” current distribution in electrical systems.
The product features a rated insulation voltage of 690V and a rated operating voltage of 380V, supporting incoming wire cross-sections from 2.5mm² to 300mm², easily covering power distribution needs from conventional circuits to high-power equipment. With a compact modular design, stable conductivity, and convenient installation and maintenance, the STS2 series has become the preferred choice for efficient wiring in the industrial electrical sector. It also supports direct connection with copper bars (compatible with copper bars up to 30mm thick), further expanding application flexibility in busbar transition scenarios.
Core Technical Advantages & Compliance Certifications
1. Authoritative Certifications & Quality Assurance
The STS2 series is designed and manufactured in strict accordance with international and domestic electrical safety standards, and has obtained the following certifications and test approvals:
- International Standard: IEC 60947-7-1 (Low-voltage switchgear and controlgear – Ancillary equipment – Terminal blocks for copper conductors)
- National Standards: GB 14048.7, JB/T 9659.1
- The product has passed type tests by national electrical product quality supervision and inspection authorities, and obtained CE and EX certifications. It meets the stringent requirements of industrial-grade applications and can operate stably for long periods in complex working conditions.
2. Reliable Conductivity & Connection Performance
- High-Quality Copper Conductors: Constructed from high-purity copper, offering excellent electrical conductivity, ultra-low contact resistance, and effectively reducing voltage drop and heat generation during high-current transmission, eliminating potential safety hazards caused by poor contact.
- User-Friendly Wiring Design: The terminal screws are equipped with hexagon socket heads, which will not damage the copper strands of the wire during tightening, while providing sufficient clamping force to ensure tight contact between the wire and the conductive component, preventing loosening even during long-term operation.
- Flexible Application Compatibility: Supports both direct wire connection and copper bar connection (up to 30mm thick), meeting the needs of quick transitions between busbars and branch circuits in distribution cabinets, eliminating complex copper bar processing steps in traditional wiring.
3. Safety Protection & Structural Design
- Transparent Protective Cover: Equipped with a transparent insulating protective cover, allowing intuitive visual inspection of wiring status while effectively preventing the ingress of dust and foreign objects, avoiding accidental contact with live parts, and improving on-site operation safety.
- Flame-Retardant Insulated Housing: Made of high-strength flame-retardant insulating material, with excellent insulation performance, high temperature resistance, and aging resistance. The housing meets industry-leading flame retardant standards, effectively avoiding safety risks such as short circuits and electric leakage.
- Compact Modular Structure: Adopts an integrated design of “conductive components + insulating base + protective cover”, with a compact and stable structure that saves cabinet installation space. It supports both DIN rail and wall-mounted installation, adapting to the installation requirements of different control cabinets.
Typical Application Scenarios
With its high current capacity, high reliability, and multi-scenario adaptability, the STS2 series distribution terminal blocks are widely used in various electrical systems:
- Low-voltage distribution cabinets/power cabinets: Enabling safe distribution of main circuit current to multiple branch circuits, simplifying internal cabinet wiring and improving power distribution efficiency.
- Complete electrical equipment: Used as high-current terminals, neutral/grounding terminals, and equipotential terminals to ensure the reliability of equipment grounding circuits.
- Industrial automation equipment: Providing stable power distribution nodes for high-power motors, frequency converters, and PLC control systems, reducing wiring complexity.
- Building electrical and rail transit: Implementing branching and transitions of main lines in building distribution and rail transit signal/power systems, meeting the needs of large-scale wiring projects.
Key Product Highlights
✅ Wide Current Compatibility: Supports wire cross-sections from 2.5mm² to 300mm², covering power distribution needs from conventional circuits to high-power equipment.
✅ Multi-Layer Safety Protection: Transparent protective cover + flame-retardant insulated housing + compliance certifications, eliminating electrical safety risks from all dimensions.
✅ Convenient Installation & Maintenance: Hexagon socket screw wiring design, no damage to wires and stable connection; transparent cover facilitates daily inspection.
✅ Flexible Scenario Adaptation: Supports both direct wire connection and copper bar transition, adapting to different cabinet wiring schemes.
✅ Industrial-Grade Quality: Passed multiple authoritative standard tests, capable of stable long-term operation in complex working conditions, reducing operation and maintenance costs.
Post time: Apr-22-2026