300A-400A Through-Wall Battery Terminal Connector with Snap-On Round Protective Cover (Red/Black)

300A-400A Through-Wall Battery Terminal Connector with Snap-On Round Protective Cover (Red/Black)

Product Definition
This is a heavy-duty, through-wall (bulkhead/panel-mount) battery terminal connector designed for high-current applications up to 300-400A. It features a square PA66 insulated base that mounts through a panel or enclosure wall, a solid copper or brass conductor for excellent conductivity, and a snap-on round protective cover for dust, moisture, and accidental contact protection. Available in red (positive) and black (negative) for polarity identification. Ideal for safe, professional power distribution in battery systems where cables pass through enclosures.

#Keywords

300A battery terminal, 400A through wall connector, lithium battery terminal block, energy storage connector, high current power feedthrough, snap-on battery cover, wall mount battery post, PA66 insulated terminal, red black battery connector, square type terminal post, bulkhead battery terminal, EV battery connector, solar inverter terminal, 1500V DC terminal

Engineered for demanding high-current environments, our 300-400A Through-Wall Battery Terminal features a robust square PA66 housing with a threaded metal base that securely mounts through panels up to standard thicknesses. The integrated copper conductor ensures low resistance and reliable power transfer, while the snap-on round cover provides quick access and excellent protection against dust, splashes, and short circuits.
Perfect for lithium battery packs, energy storage systems (ESS), solar inverters, electric vehicles, RVs, marine applications, and industrial power distribution. The color-coded design (red for positive, black for negative) minimizes installation errors, and the flame-retardant materials meet rigorous safety standards.

Custom Description (Detailed & Engaging):

• Engineered for demanding high-current environments, our 300-400A Through-Wall Battery Terminal features a robust square PA66 housing with a threaded metal base that securely mounts through panels up to standard thicknesses. The integrated copper conductor ensures low resistance and reliable power transfer, while the snap-on round cover provides quick access and excellent protection against dust, splashes, and short circuits.
• Perfect for lithium battery packs, energy storage systems (ESS), solar inverters, electric vehicles, RVs, marine applications, and industrial power distribution. The color-coded design (red for positive, black for negative) minimizes installation errors, and the flame-retardant materials meet rigorous safety standards.

Parameter Technical details:

Usage Scenarios & Applications:

• Lithium-ion battery packs and energy storage systems (home, commercial, industrial).
• Solar PV inverters and off-grid power setups.
• Electric vehicles (EV), golf carts, forklifts, and heavy machinery.
• Marine, RV, and camper battery banks.
• UPS systems, telecom power, and server racks.
• Any high-current DC application requiring safe panel penetration and polarity protection.

Core Value & Benefits:

• High Current Capacity: Safely handles 300-400A continuous current with minimal voltage drop.
• Through-Wall Design: Enables clean, professional cable routing through enclosures while maintaining seal integrity.
• Safety & Protection: Snap-on round cap + insulated body reduces risks of accidental contact and environmental damage.
• Durability: Wide operating temperature (-40°C to +125°C), high insulation voltage (1500V DC), and flame-retardant PA66 material.
• Easy Installation: Flange mounting with screw holes; compatible with standard cable lugs.
• Professional Appearance: Clean, compact design suitable for visible or OEM installations.
• Cost Efficiency: Reliable performance reduces maintenance and failure risks in critical power systems.

Dongguan Ritian Communication Technology Co., Ltd.

Founded in January 2009, Dongguan Ritian Communication Technology Co., Ltd. is a premier domestic connector manufacturer dedicated to the design and development of connection system solutions, operating a nearly 2,000㎡ production facility.

Our comprehensive product portfolio encompasses high-frequency, low-frequency, fiber-optic, industrial, and high-speed connectors, alongside a full range of cable assemblies including RF, signal, power, fiber-optic, and automotive wiring harnesses. Most products are UL and TUV certified, fully compliant with IEC international and domestic industry standards, serving diverse sectors such as data communication, industrial control, new energy, medical electronics, equipment manufacturing, army aerospace, and automotive systems, with exports to North/South America, Europe, East Asia, and Southeast Asia.

We hold ISO 9001, IATF 16949, ISO 13485, and GJB 9001B certifications, as well as Class III Confidentiality Qualification and Army Production License for Weaponry R&D. Backed by a 30+ member R&D team with 7 national patents, a complete industrial chain, and advanced testing laboratories, we deliver reliable, high-quality products and end-to-end solutions to global clients.

Connector & Cable Assembly FAQ

Q1: Can your connectors/cable assemblies be customized? What is the minimum order quantity (MOQ)?

A: We support full-category customization, and can provide exclusive design and prototyping according to your drawings, parameters (electrical/mechanical/environmental performance) and application scenarios (such as army/automotive/medical). The MOQ for standard products is as low as 500pcs, and the MOQ for customized parts is negotiated based on product complexity. We accept both small-batch trial orders and large-volume orders.

Q2: What is the service life, temperature resistance, waterproof and other environmental performance of the products?

A: The full range of products can provide different protection levels (such as IP67/IP68 waterproof), wide temperature range (-40℃~+85℃ and above), high vibration/impact resistance as required. All products have passed the full electrical, mechanical and environmental performance tests in the laboratory, ensuring long-term stable use in complex working conditions such as industry, army and automotive.

Q3: What are the application fields of your products? Are they suitable for my industry?

A: Our core coverage includes 7 major fields: data communication, industrial control, new energy, medical electronics, equipment manufacturing, army supporting, and automotive wiring harness. High-frequency/low-frequency/fiber-optic/industrial/high-speed connectors and various cable assemblies can meet the stringent requirements of industrial automation, new energy vehicles, medical equipment, army equipment and other segmented scenarios.

Q4: What are the production lead times for standard and customized products?

A: The regular lead time for standard products is 3-7 working days; the prototyping cycle for customized parts is 7-15 working days, and the mass production cycle is 15-30 working days. We can coordinate priority production scheduling according to your urgent order requirements.

Ritian Communications Co., Ltd. was founded in January 2009, with a building area of nearly1300 square meters. Is a research and development, production and sales of electronic components and components, photoelectric connectors, sensors, wiring harness components of private high-tech enterprises.
Since its inception, the company has been focusing on the design and development of connection system products. It is a well-known connector manufacturer in China and ranks first in the industry. The company's main products include high-frequency connectors, low-frequency connectors, optical fiber connectors, industrial connectors, high-speed connectors, etc. Cable components mainly include radio frequency cable components, signal cable components, power cable components, optical cable components, automotive wiring harness and so on.

Most products have passed UL certification and TUV certification. All products conform to IEC international standards and domestic industry standards, and are widely used in data communication, industrial control, new energy, medical electronics, equipment manufacturing, military support, automotive wiring harness support and other fields. Some products are exported to North America, South America, Europe, East Asia and South Asia and other countries and regions. The company has strong comprehensive supporting and service capabilities, stable and reliable product quality, and has received unanimous praise from customers at home and abroad.

The company has passed ISO 9001 quality management system certification, ISO/TS16949 quality management system certification, ISO 13485 quality management system certification, GJB9001B:2009 military quality system certification, and has obtained three-level confidentiality

qualification of research and production units of weapons and equipment and scientific research and production license.
The company has a high-quality and experienced R&D team of more than 30 people. It has set up technical and engineering development teams of high frequency, low frequency, optoelectronics, industry, military industry, automobile wiring harness, cable components, die design and so on.The company has declared 7 national patents, including 5 utility models and 2 invention patents.
The company's industrial chain is complete, from die design, die maintenance and manufacturing,continuous stamping, injection molding, mechanical processing, precision die casting and other production. In addition to its powerful online testing capability, it is equipped with a modern laboratory, which can complete the electrical, mechanical and environmental performance testing of various connectors. At present, it is applying for laboratory CNAS certification.