AOSI Electronics is a leading spring terminal block manufacturer in China, specializing in tool-free terminal blocks with reliable spring clamp technology. Our products ensure fast, vibration-resistant wiring—ideal for modern Industrial automation, intelligent robotic equipment, energy equipment.
We offer OEM/ODM customization, fast lead times, and global delivery to support your industrial wiring projects.
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.
We’ve been sourcing spring terminal blocks from AOSI for over 2 years. The tool-free design makes our panel assembly much faster, and the quality is consistently reliable.
AOSI’s support team responded quickly and provided customized DIN rail terminal blocks for our automation equipment. Highly professional and efficient!
We needed compact terminal blocks for a tight space in our HVAC control box. AOSI delivered on time with great service and OEM flexibility.
As a distributor, I appreciate working directly with a manufacturer like AOSI. Their spring terminal block quality, pricing, and lead time meet our global buyer standards.
AOSI spring terminal blocks are trusted across a wide range of industrial applications. From control panels and PLC systems to I/O modules and OEM electrical equipment, our solutions provide reliable, space-saving, and tool-free wiring to meet the demands of modern automation and manufacturing environments.
Spring terminal blocks ensure fast, vibration-proof wiring in control panel installations. Their tool-free design speeds up assembly and improves maintenance efficiency in automation lines.
Ideal for modular systems, our terminal blocks integrate seamlessly with I/O modules, offering quick connection and compact arrangement in PLCs and signal control boxes.
Spring Terminal Blocks are perfect for compact PLC cabinets, where saving spa ce is important. They allow multiple connections in a small area, making them ideal for dense signal wiring and modular PLC system setups.
AOSI’s terminal blocks are widely used by OEM manufacturers for customized electrical systems. With various mounting options and housing styles, they simplify internal wiring across different product lines.
A spring terminal block is a screwless wire connection component that uses internal spring force to clamp wires securely. It simplifies wiring, reduces installation time, and is ideal for high-vibration industrial applications.
Our terminal blocks support 2–24 poles with modular design. You can either order pre-assembled units or splice individual modules using our interlocking mechanism — perfect for scalable system design.
Mounting types include:
✔️ PCB soldering with 45°, 90°, or 180° orientations
✔️ DIN rail mounting for control panels
✔️ Panel mount for enclosures
This makes our products highly adaptable for a variety of electrical system layouts.
Yes! We offer free engineering samples to qualified buyers. Just let us know the model, pitch, number of poles, and quantity you’d like to test.
We offer multiple pitch sizes: 2.5mm / 3.5mm / 5.0mm / 7.62mm / 10.16mm, supporting different voltage, current, and space requirements. Custom pitches can be developed for specialized needs.
We provide two screwless wiring options:
– Push-in type (for solid wires)
– Button-release type (for stranded wires)
Both offer easy, secure installation with excellent contact reliability.
Yes — as a trusted spring terminal block manufacturer, we support:
🔹 Logo printing (pad/laser)
🔹 Color customization
🔹 Tailored pole count / pitch
🔹 Branded packaging
Just send us your specs or drawings for evaluation.
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.
Our spring terminal blocks support 2–24 poles and offer 45° / 90° / 180° soldering orientations, with two wiring options: push-in direct or button-operated connection.
Please let us know the pitch size, number of poles, and your preferred wiring method, along with any customization requests.
We’ll reply promptly with tailored solutions, 3D drawings, and a competitive quotation.
Looking for other types of terminal blocks? Discover our full range of connection solutions below.
