Discover our full range of barrier terminal blocks—available in various pitch sizes such as 6.35mm, 7.62mm, 8.25mm, and 9.5mm, designed for secure and stable wire connections in industrial power and control systems.
Discover our full range of barrier terminal blocks—available in various pitch sizes such as 6.35mm, 7.62mm, 8.25mm, and 9.5mm, designed for secure and stable wire connections in industrial power and control systems.
AOSI Electronics is a professional manufacturer of barrier terminal blocks, providing rugged and secure wire-to-board solutions with clear separation between terminals. Ideal for power distribution units, control cabinets, and electrical panels, our barrier blocks offer excellent thermal resistance, safety, and easy installation.
We support OEM/ODM services, color-coded options, flexible mounting types, and rapid global delivery to meet diverse industrial wiring needs.
At AOSI Electronics, all our terminal blocks and connectors are rigorously tested and fully certified:
✅ UL, CE, RoHS, and REACH compliant
✅ 100% quality inspection before shipment
✅ Strict adherence to ISO 9001:2015 quality management standards
✅ Fireproof, high-temperature resistant, and vibration-tested designs for industrial environments
🔒 Reliable connection starts with certified components. We make no compromise when it comes to safety and compliance.
As a direct factory with over 15 years of experience in terminal block production, AOSI provides:
🔧 Over 30 injection molding machines
🧰 In-house tooling and mold design capabilities
👷 50+ skilled workers and 8 production lines
🚚 Monthly output over 5 million pieces
From prototyping to bulk delivery, we offer stable lead times, flexible MOQ, and consistent product quality.
Whether you are a distributor, system integrator, or OEM, AOSI is ready to support your growth:
🌐 Exporting to 40+ countries across Europe, Asia, and the Americas
🧩 Customizable options: pin count, logo, color, housing material, packaging
🤖 Engineering support for special pitch, modular block design, and high-current applications
📦 We speak your language: fast communication, drawings, samples, and global logistics support.
“AOSI has been a trusted supplier of terminal blocks in our panel manufacturing business. Their lead time, quality consistency, and support for custom labeling are excellent.”
“Great product and reliable service. The screw terminals stayed secure even under vibration, which is critical for our industrial machines.”
“We’ve integrated AOSI’s barrier blocks into our power control systems. Their wide pitch range and robust insulation make them ideal for high-voltage applications. Great for factories needing safe and efficient terminal solutions.”
“AOSI helped us source cost-effective yet high-quality terminal blocks for our distribution network. Their screw terminals with protective barriers improved safety and simplified technician maintenance.”
Barrier terminal blocks provide safe and reliable connections for high-current wiring. With screw clamps and built-in insulation barriers, they prevent short circuits and ensure clear separation between wires. Suitable for power systems, control panels, machines, and transport equipment.
Barrier terminal blocks offer robust, low-resistance connections for power converters, distribution units, and industrial UPS systems. Their clear separation between terminals enhances electrical safety in high-voltage circuits.
In HVAC systems and building control panels, barrier blocks provide reliable wire isolation and strong retention, helping installers prevent wiring errors and maintain long-term performance in varying climates.
For high-power motors, factory automation, and control systems, barrier terminal blocks withstand mechanical stress and vibration, keeping wires tightly secured and safely routed inside enclosures.
Used in locomotives, signal control, and onboard systems, barrier terminal blocks offer high insulation, flame-retardant materials, and vibration resistance—critical for stable performance in rugged transportation environments.
Barrier terminal blocks are used to connect high-current wires safely, with insulation barriers that prevent short circuits. They are commonly installed in power distribution panels, control systems, and heavy equipment.
Common pitch sizes include 6.35mm, 7.62mm, 8.25mm, and 9.5mm. The pitch determines spacing between terminals and helps match wiring layout needs.
Consider the following:
Yes, protective covers are available and recommended for added safety. They provide:
Yes. Many models are designed for 20A–125A or more, with solid screw-type connections and heat-resistant housing for industrial use.
Barrier terminal blocks typically use flame-retardant plastic (like PA66 UL94V-0) and brass or tinned copper contacts to ensure safety and durability.
Yes, our products meet international standards:
For standard items: 7–10 working days
For custom/OEM parts: 2–4 weeks depending on mold and order volume.
We aim to support fast design-to-production timelines.
Looking for safe, durable, and CE-certified barrier terminal blocks for power distribution, control panels, or heavy machinery? We offer a wide selection of barrier and fence terminal blocks with various pitch options, high-current ratings, and strong screw connections. OEM customization, fast delivery, and global support are available.
Request your free samples or get a personalized quote today!
Looking for other types of terminal blocks? Discover our full range of connection solutions below.
