OTL35 connector blue 1xAl/Cu 2.5-35mm² 1000V AC/1500V DC, universal terminal MAA1035B10

Universal Al/Cu connections without compromise

The OTL35 busbar terminal is an advanced solution for professionals seeking a reliable connection between aluminum and copper conductors in a single component. Thanks to innovative aluminum galvanizing technology and factory-applied contact paste, the device eliminates the need for additional Cu/Al adapters or bimetallic ferrules.

The wide range of compatibility includes conductors with cross-sections from 2,5 to 35 mm² in solid, stranded, and flexible forms, with or without ferrule terminals. A single terminal block handles both rigid wires and flexible stranded conductors, significantly simplifying the installation process and reducing the number of required components.

The tightening torque is visible on the terminal block cover, facilitating easy control of correct assembly. Hex 4 drive screw terminals require a torque of 3 Nm for 2,5-16 mm² conductors and 6 Nm for 25-35 mm² conductors, ensuring optimal pressure without the risk of damaging the conductor.

Electrical parameters and operational safety

The device operates at a rated voltage of 1000V AC / 1500V DC, making it suitable for both low-voltage and medium-voltage installations. The rated current is 135 A for copper conductors and 120 A for aluminum, providing sufficient capacity for most distribution applications.

The operating temperature range from -25°C to +80°C guarantees stable operation in difficult environmental conditions, from freezing warehouses to hot process rooms. The IP20 protection class protects against accidental contact with live parts under standard installation conditions.

The terminal block has passed rigorous mechanical, load, and short-circuit tests, achieving short-circuit class A. This means it can be used as main power terminals in installations exposed to current overloads and short circuits, ensuring the highest level of operational safety.

Mechanical construction and quality certification

The housing is made of thermoplastic material with V0 flammability class according to UL94, ensuring maximum fire safety and resistance to high temperatures. The insulating material maintains its dielectric properties throughout the entire operating temperature range.

The ClickSet™ mounting mechanism allows for rapid attachment to TH-35 mm DIN rails by simply sliding the element onto the rail until a characteristic click confirms correct mounting. Alternatively, mounting via M4 screws is also possible for applications requiring additional mechanical fastening.

The device dimensions are a compact 16 × 40 × 45 mm (width × height × depth), allowing for dense packing in distribution boards while maintaining easy access to terminals during installation and service.

Professional applications and compliance standards

The OTL35 busbar terminal finds wide application in photovoltaic installations, where it is often necessary to connect aluminum conductors (strings) with copper ones (supply cables). In such applications, Al/Cu versatility eliminates problems of electrochemical corrosion between different metals.

In industrial switchgear, the device performs well as a power distribution element and a main connection point for higher-power motors. In building installations, it can be used to connect high-power loads such as electric furnaces or heating systems.

The product meets the requirements of European standards EN 60947 and EN 61238, confirming its compliance with electrical safety standards. It also holds international certificates UL1059 and SGS FI quality tests, documenting high manufacturing quality and long-term reliability.

A color range is available including gray (standard), blue (this model), yellow-green (PE), red, and black, allowing for easy coding of electrical functions accordingto industry convention.