Moderus Beta are trams resulting from the modernization of German Stadtbahnwagen M/N cars, produced by the company Modertrans Poznań.

The new section is equipped with outward-opening doors, resulting in wide, unobstructed entrances without a central post, allowing for quick passenger exchange.

[4] Both ends of the tram were replaced with new, modern designs featuring curved, panoramic front windows.

[1] During the first modernization for Gdańsk, the trams were equipped with traditional ticket validators, electronic displays, new plastic seats, monitoring systems, and air conditioning in the motorman's cabin.

[6] In 2018, the second stage of the modernization of the N8C trams began in Gdańsk, which included replacing the motors, lighting, heating, and sandboxes, as well as installing ABS.

[9][10] Initially, they were acquired to serve the planned line to Chełm, which the Konstal 105Na trams, dominant in the operator's fleet, could not accommodate.

This tram arrived inoperable and had to be towed to the Wrzeszcz depot, a fact criticized by the local press.

[2] Modertrans was the only bidder in the tender for their modernization, but its offer was rejected due to exceeding the budget.

[27] However, the tender was canceled – Modertrans exceeded the cost estimate, and 4iB did not submit a bid bond.

[7] Between July and August 2017, one tram received a gold wrap as part of an external campaign dedicated to Hans Memling's The Last Judgment, commissioned by the National Museum in Gdańsk.

[35] According to the tender conditions, only bids from companies with experience in modernizing at least 3 such trams and certified for operation in Poland were accepted.