OTL50-3 connector blue 3xAl/Cu 1.5-50mm² 1000V AC/1500V DC, universal terminal MAA3050B10

Universal Al/Cu terminal block for demanding installations

The OTL50-3 blue terminal block is a professional distribution board component designed for the secure connection of aluminum and copper conductors in installations with high technical requirements. Thanks to its universal design, it handles conductors with cross-sections of 1,5-50 mm² at a rated voltage of 1500V DC / 1000V AC and a current of 320A, making it an ideal solution for power distribution in energy systems.

Secure Al/Cu connection without adapters

A key advantage of this terminal block is the zinc coating technology and factory-applied contact paste, which enables the direct connection of aluminum and copper conductors without the need for expensive bimetallic adapters. This innovative design eliminates galvanic problems between different conducting materials, ensuring long-term protection against oxidation and corrosion at the electrical contact point.

Three connection holes significantly increase installation flexibility, allowing for the creation of extensive branches or the connection of several circuits from a single power point. The blue housing color clearly identifies its purpose for neutral conductors (N), which facilitates installation organization and meets installation standard requirements.

Highest standards of safety and reliability

The terminal block features short-circuit withstand capability A, confirmed by rigorous compliance tests with IEC/EN 60947 and IEC/EN 61238 standards. This means it is approved for use as main supply connection terminals in installations exposed to extreme current overloads and short circuits, meeting the most restrictive safety requirements.

The housing, made of thermoplastic material with flammability class V0 (UL94), guarantees maximum safety in the event of a fire, minimizing the spread of flames. The operating temperature range of -25°C to +80°C ensures reliability in difficult environmental conditions.

Fast mounting and versatility of applications

The ClickSet™ mounting mechanism allows for instantaneous attachment to the TH-35 mm DIN rail, significantly accelerating the installation process. Alternatively, screw mounting is also possible for greater application flexibility.

Practical applications include:

• Residential and building switchgear - as power distribution elements for multiple circuits,
• Industrial installations - connecting power to machines, motors, and control panels,
• Photovoltaic (PV) systems - thanks to the ability to work with DC voltages up to 1500V,
• Modernization of existing installations - secure connection of new Cu conductors with old Al infrastructure,
• Energy distribution systems - where multi-point power distribution is required.