Screw Terminal Blocks for High-Current Industrial Wiring

Discover our full range of screw-type terminal blocks—designed for secure, high-current connections in industrial control panels, HVAC, and power distribution systems.
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Screw Terminal Blocks for High-Current Industrial Wiring

Discover our full range of screw-type terminal blocks—designed for secure, high-current connections in industrial control panels, HVAC, and power distribution systems.
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Leading Screw Terminal Block Manufacturer

AOSI Electronics is a trusted manufacturer of screw terminal blocks, offering durable, high-current solutions with secure screw clamp technology. Our terminals ensure stable connections under vibration and heat—perfect for power distribution, control panels, and field wiring.

We support OEM/ODM customization, flexible packaging, and global shipping with fast turnaround.

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UL/CE/RoHS 인증

AOSI Electronics의 모든 단자대와 커넥터는 엄격한 테스트를 거쳐 완벽한 인증을 받았습니다:

UL, CE, RoHSREACH 준수

✅ 배송 전 100% 품질 검사

✅ 다음 사항을 엄격하게 준수 ISO 9001:2015 품질 관리 표준

✅ 산업 환경을 위한 내화성, 고온 내성 및 진동 테스트를 거친 설계

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프로토타이핑부터 대량 납품까지 다음을 제공합니다. 안정적인 리드 타임, 유연한 MOQ일관된 제품 품질을 제공합니다.

OEM 역량 및 글로벌 도달 범위
OEM/ODM 기능

유통업체, 시스템 통합업체, OEM 등 어떤 기업이든 AOSI는 귀사의 성장을 지원할 준비가 되어 있습니다:

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특수 피치, 모듈식 블록 설계 및 고전류 애플리케이션을 위한 엔지니어링 지원

빠른 커뮤니케이션, 도면, 샘플, 글로벌 물류 지원 등 고객의 언어를 지원합니다.

고객 의견 보기

Screw Terminal Block Solutions for Industrial Applications

Power Supply Systems

For high-current power wiring, screw-type terminal blocks offer low contact resistance and heat-resistant performance. They are a trusted choice in power converters, inverters, and main distribution units.

HVAC & Building Automation

Used in HVAC control boards and intelligent building systems, screw terminals simplify field wiring while ensuring safe, long-term connectivity under varying temperature and humidity conditions.

Machinery & Industrial Equipment

Heavy-duty machines rely on secure wiring to prevent downtime. Screw terminal blocks are preferred for their firm connection and ability to handle shock and mechanical stress in complex equipment setups.

Railway & Transportation Systems

In trains and transportation control systems, screw terminal blocks maintain connection integrity despite constant vibration. Their high insulation strength supports safety-critical applications.

FAQs Screw Terminal Block

A screw terminal block is an electrical connector that joins wires using a tightening screw to create a firm electrical connection.

To wire a screw terminal block correctly, follow these steps:

  1. Strip the wire: Remove 7–10mm of insulation (refer to datasheet for exact length).
  2. Use ferrules (optional): For stranded wires, use ferrules to improve grip and reduce fraying.
  3. Insert the wire: Push the wire fully into the terminal slot.
  4. Tighten the screw: Use a torque screwdriver to ensure secure contact without overtightening.
  5. Test the connection: Gently pull on the wire to confirm it’s locked in place.

Yes. We offer branding (logo engraving), custom housing colors, special packaging, and even customized screw types or pitch sizes for high-volume OEM orders. We work closely with your engineering team to match your exact design and regulatory needs.

To select the correct screw terminal block, consider the following:

Current rating & voltage: Match your application’s electrical demands.

Wire size range: Ensure the terminal accepts your wire gauge (e.g., 0.5–35mm²).

Mounting type: PCB-mount, DIN rail–mount, or panel-mount?

Environmental conditions: Exposure to heat, dust, vibration, etc.

Certifications needed: CE, UL, RoHS for compliance.

Still unsure? Contact our engineers with your application scenario—we’ll recommend the best-fit model.

Yes! Here’s how to request samples:

  1. Choose the model(s) from our catalog.
  2. Share your company name, application, and shipping address.
  3. We’ll confirm stock and send samples via DHL or FedEx.
  4. Standard samples are free; customized ones may incur a fee.

Our screw terminal blocks cover wire ranges from 0.5mm² up to 35mm² (AWG 22–2). This range supports both signal-level wiring and high-current power delivery. Wire size compatibility is clearly marked on each datasheet.

Feature 나사 단자 블록 스프링 터미널 블록
Connection Method Mechanical screw clamping Push-in or lever spring clamp
Current Capacity Higher – ideal for power applications Moderate – ideal for signal/control wiring
Wire Size Flexibility Excellent for large-diameter wires Limited for thick cables
Vibration Resistance Strong, but may loosen if not torqued Excellent – self-tensioned contact
Installation Speed Slower – manual screwing required Faster – tool-free

Yes, our products meet international standards:

CE – European safety compliance.

RoHS – Restriction of hazardous substances.

UL (optional) – Available for high-volume OEM orders.

📦 All certifications are provided with the shipment or electronically for your records.

표준 항목의 경우: 영업일 기준 7~10일

맞춤형/OEM 부품의 경우: 2-4주 금형 및 주문량에 따라 다릅니다.

빠른 디자인에서 제작까지의 타임라인을 지원하는 것을 목표로 합니다.

Get the Right Screw Terminal Block for Your Project

Looking for durable and CE-certified screw terminal blocks for your industrial wiring needs? AOSI Electronics offers a wide range of high-current screw-type connectors with fast lead times, OEM customization, and global delivery.

Get in touch today to request free samples or a tailored quote for your project.

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