What Are UKK Terminal Blocks?
UKK terminal blocks are DIN rail-mounted power distribution connectors designed for high-current, multi-circuit applications in automation, energy, and industrial control. They utilize robust screw or clamp terminals, flame-resistant PA66 housings, and are widely used for distributing power from a single source to multiple loads safely within a control cabinet or distribution panel.
Key Benefits:
- High current rating (up to 500A or more)
- Compact double-level (UKK) design saves space
- Secure, vibration-resistant connections
- Certified for CE, RoHS, and often ISO9001 compliance
UKK Terminal Blocks
- UKK-series power distribution blocks offer a single-input, multiple-output solution for high-current wiring in control cabinets and power systems.
How to Select the Right UKK Terminal Block
Selecting the correct UKK block is essential for operational safety and reliability. Consider these factors:
- Electrical Ratings: Match your system’s maximum current and voltage requirements. Overrating helps avoid overload and overheating.
- Wire Compatibility: Check the block’s terminal size for input/output wire diameter range.
- Installation Environment: Confirm DIN rail compatibility, temperature, humidity, and enclosure material needs.
- Certifications: Prioritize products with CE, RoHS, and ISO certifications for assured quality and export compliance.
Quick Checklist:
☐ Meets voltage/current demands
☐ Supports your wire sizes
☐ DIN rail mountable
☐ Required certifications included
☐ Accessories (markers, covers, jumpers) available
Leading UKK Terminal Block Manufacturers (2025)
Based on global sourcing and export reviews, the following China-based companies stand out for reliability and OEM/ODM capability:
| Hersteller | Key Strengths | Zertifizierung | Service Type |
| AOSI Elektronik | Full OEM/ODM, UKK500A | CE, RoHS, ISO | Factory Direct |
| Phoenix Contact China | Innovative design | CE, UL, ISO | Global Brand |
| WAGO | Spring/screw connectors | CE, RoHS, UL | Local Branch |
| Cixi Wanjie | Huge range, colors | CCC, CE, RoHS | OEM/ODM |
| Kangnex Electrical | Cost-effective, quick | CCC, CE, RoHS | OEM wholesale |
These companies cover different market tiers — from budget OEM suppliers to premium certified brands.
AOSI Elektronik stands out for its balance of factory-direct pricing and international compliance, making it a preferred partner for custom UKK solutions.
What sets a top manufacturer apart?
- Automated, scalable production lines
- Customizable packaging and branding
- Multilingual service and support
- Adherence to international standards for export markets
OEM/ODM Model and Sourcing Process
Working with an OEM/ODM terminal block manufacturer can dramatically reduce costs and accelerate project timelines. Here’s how the process typically works:
- Define Requirements: Technical specs, certifications, current/voltage, color/branding, order quantity
- Supplier Evaluation: Check factory audits, reviews, compliance records
- Sample Testing: Order prototypes for in-house validation
- Commercial Agreement: Negotiate MOQ, lead time, payment, and intellectual property
- Mass Production & QC: Manufacturer executes with full batch testing and certification
- Logistics & Project Support: Arrange shipping, provide tech documents, set up after-sales service
Typical Service Offered:
- Custom shell color and mold
- Private logo marking
- Fast track for urgent industrial projects
Quality Control, Certification & Compliance
Reliability and safety depend on strict QC and certification:
- CE/UL Certification: Essential for EU/US export
- RoHS: Confirms lead and hazardous substance-free
- CCC (China Compulsory Certification): Required for China-local sales
- ISO9001: Quality management system for consistent production
- Environmental Standards: PA66 housing (UL94-V0), recycling, EMC compliance
| Certificate | Beschreibung | Target Market |
| CE | Electrical safety, EMC conformity | EU |
| RoHS | Hazardous material ban | Global |
| ISO9001 | Factory quality processes | Global |
| UL | North America safety compliance | USA/NA |
| CCC | China market access | China |
Testing Steps:
- Incoming material check
- Electrical & mechanical stress test
- Final inspection and documentation
FAQs – UKK Power Distribution Blocks
A1: Yes, most top Chinese manufacturers offer OEM branding, custom colors, packaging, unique cable interfaces, and private labeling as part of their ODM services.
A2: Consider your system’s maximum current, voltage, wire size, number of outputs, mounting type, and the installation environment to select the proper block. Always review manufacturer datasheets for technical specs.
A3: Common MOQ is 10 pcs/model; most factories supply 2–5 evaluation samples with refundable sample fees on PO confirmation.
A4: Most UKK series terminal blocks are available in red, yellow, blue, and green, which help distinguish neutral, phase, and ground circuits in control panels. OEM manufacturers such as AOSI Elektronik also offer custom color options for branding or specific wiring schemes.
Schlussfolgerung
Choosing the right UKK terminal block manufacturer is critical for project safety, compliance, and cost-efficiency. Always check credentials, test samples, and partner with OEM/ODM suppliers offering scalable service and global certification for peace of mind in every industrial installation.
