Product Description
300A Square Terminal Block for High-Current DC Systems
The SL-300A-A 300A Square Terminal Block is a panel-mounted electrical connection component developed for battery energy storage equipment, DC power distribution cabinets, and industrial power systems.
With a rated current of 300A and a rated voltage of 600V DC, this terminal block provides a connection interface for equipment requiring high-current DC conductor connections.
The SL-300A-A features a single-threaded conductive terminal, H62 brass components, and a reinforced PA66 insulating structure. Its square mounting arrangement allows equipment manufacturers to integrate the connection point into appropriately prepared electrical panels.
Red and black housing options are available for different terminal identification and wiring arrangements.
Key Features of the SL-300A-A Terminal Block
1. 300A Current Rating
The SL-300A-A is specified for a rated current of 300A, making it a potential connection component for compatible high-current DC equipment.
For applications involving battery storage or power distribution, the selected terminal must accommodate the system’s operating current and voltage requirements.
Engineers should also consider conductor cross-section, termination hardware, ambient temperature, and the thermal characteristics of the complete connection assembly.
2. Single-Threaded Brass Connection
This model belongs to the Type A single-threaded square terminal block series.
The single-threaded structure provides a connection interface for compatible electrical conductors and cable terminals.
The supplied engineering drawing includes an M10 thread specification, allowing installers to identify the required connection hardware after confirming the final thread dimensions.
Compared with double-threaded Type C models, the SL-300A-A offers a different connection arrangement for equipment design.
3. H62 Brass Conductive Structure
The terminal’s conductive components are specified as H62 brass, a copper alloy used in electrical connecting hardware.
According to the manufacturer’s engineering drawing, nickel-plated or tin-plated surface treatments are specified for the metallic components.
These finishes provide surface protection and support the use of the terminal in appropriately designed electrical assemblies.
4. Reinforced PA66 Insulating Components
The SL-300A-A uses PA66+GF30 insulating components as indicated in the supplied engineering documentation.
This glass-fiber-reinforced engineering plastic provides mechanical support for the terminal structure while helping isolate the conductive parts from surrounding mounting surfaces.
The terminal assembly also includes a protective cover for physical separation around the connection area.
5. Square Panel-Mounting Design
The 300A square terminal block features a mounting base measuring 43 × 43 mm.
The supplied drawing shows a 33 × 33 mm mounting hole center spacing, allowing panel designers to prepare the corresponding installation layout.
Before installation, engineers should verify the mounting-hole diameter, central opening dimensions, panel thickness, and fastening arrangement against the original technical drawing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | SL-300A-A |
| Product Name | 300A Square Terminal Block |
| Rated Current | 300A |
| Rated Voltage | 600V DC |
| Connection Structure | Single-Threaded |
| Thread Specification | M10 (Refer to Drawing) |
| Conductive Material | H62 Brass |
| Surface Treatment | Nickel-Plated / Tin-Plated |
| Insulation Material | PA66+GF30 |
| Mounting Base | 43 × 43 mm |
| Mounting Hole Spacing | 33 × 33 mm |
| Mounting Method | Panel Mounting |
| Housing Colors | Red / Black |
Product Dimension Drawing
Applications of the 300A Square Terminal Block
Battery Energy Storage Systems
The SL-300A-A can provide a panel-mounted electrical connection point in compatible battery enclosures and energy storage power assemblies.
High-Current DC Distribution Cabinets
Its 300A rating makes it a candidate for DC distribution equipment requiring appropriately rated conductor connections.
Inverter and Power Conversion Equipment
The terminal block can be incorporated into compatible inverter cabinets and DC power conversion assemblies where the electrical ratings and mounting configuration meet system requirements.
Industrial Power Equipment
The SL-300A-A may also be used in industrial power supply cabinets, electrical testing equipment, and other high-current electrical assemblies.
Why Choose the SL-300A-A Square Terminal Block?
The SL-300A-A combines a 300A rated current, single-threaded brass connection structure, reinforced PA66 insulation, and a square mounting configuration.
Its 43 × 43 mm mounting base and red or black housing options provide practical choices for battery equipment manufacturers, electrical panel builders, and DC power system integrators.
For equipment requiring double-threaded connections, the SL-300A-C provides an alternative configuration within the same 300A series.
FAQ
What are the electrical ratings of the SL-300A-A terminal block?
The SL-300A-A is specified for a rated current of 300A and a rated voltage of 600V DC.
What connection type does the SL-300A-A use?
It uses a single-threaded Type A connection configuration. The supplied engineering drawing indicates an M10 thread specification.
What is the mounting base size of this 300A terminal block?
The supplied engineering drawing shows a 43 × 43 mm mounting base with a 33 × 33 mm mounting-hole center spacing.
Can the SL-300A-A be used in energy storage systems?
It is intended for compatible battery energy storage and DC power distribution equipment. Final selection depends on electrical ratings, conductor compatibility, installation conditions, and system design.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
