TDK Ventures has closed its second fund, which is three times the size of the debut vehicle it launched nearly two years ago.

TDK Ventures, the corporate venturing capital subsidiary of Japan-based electronics producer TDK, closed its sophomore fund at $150m yesterday.

The unit intends to tap its second fund to build a portfolio of 50 early-stage companies over the next three years.

The fund will focus on sectors including clean technology, advanced materials, industrial, robotics, energy, autonomous vehicles, electric vehicles and health technology. TDK Ventures typically invests between $250,000 and $5m in each funding round.

Incubator Mach49 advises TDK Ventures, which launched…