TRYTYT Insulated Ferrule 4mm² DUI-4,0-12SZ Grey (100 pcs)

With a 12 mm tin-plated copper tube and a 4 mm² wire capacity, the TRYTYT DUI-4,0-12SZ insulated ferrule delivers secure, professional terminations for stranded conductors. This grey-coded ferrule is flared for easy insertion and rated to 600 V and 105°C, making it a reliable choice for industrial and panel wiring.

Overview

The TRYTYT DUI-4,0-12SZ is a high-quality insulated ferrule designed for terminating flexible copper wires with a cross-section of 4 mm². The metal tube is made of electrolytic copper with a tin-plated finish, ensuring excellent conductivity and corrosion resistance. The grey polypropylene insulation sleeve provides electrical isolation and mechanical protection, while the flared entry simplifies wire insertion, even for slightly frayed strands. Each pack contains 100 pieces, offering a cost-effective solution for high-volume wiring projects.

What stands out

• Precision-engineered 12 mm metal tube for a tight, reliable crimp
• Flared entry design reduces installation time and strand damage
• Grey insulation colour-coded for 4 mm² wires, compliant with DIN 46228
• Tin-plated electrolytic copper tube for superior conductivity and oxidation resistance
• Rated for up to 600 V and 105°C, suitable for demanding electrical environments
• RoHS and CE certified, meeting international safety and environmental standards

Technical details

• Wire cross-sectional area: 4 mm²
• Metal tube length: 12 mm
• Total length: 18 mm
• Insulation colour: Grey
• Insulation material: Polypropylene (PP)
• Metal tube material: Electrolytic copper, tin-plated
• Inner diameter (metal tube): approx. 2.8 mm
• Outer diameter (metal tube): approx. 3.2 mm
• Insulation outer diameter: approx. 4.5 mm
• Maximum operating temperature: 105°C
• Maximum voltage rating: 600 V
• Conductor compatibility: Flexible (stranded) copper wire
• Certifications: RoHS, CE
• Pack quantity: 100 pieces

Our verdict

A dependable and cost-effective ferrule for professional electricians and panel builders. The flared entry and precise dimensions ensure a secure crimp every time, while the grey colour coding simplifies wire identification. With a generous 100-piece pack, it's an excellent value for high-volume applications.