Atomic Machines discloses $250M raised to date for micro-machine platform

Atomic Machines has emerged from six years in stealth with a manufacturing system for turning digital designs into working micro-machines. Its first product, PrimeSwitch, is a tiny electromechanical relay intended to protect 800-volt direct-current power systems in AI data centers. The October 7 launch included a disclosure that the company has raised $250 million to date.

That is a cumulative figure rather than a newly detailed round. The company named nine backers in its announcement, but did not disclose how the capital was divided among rounds or provide a valuation, The Next Web reported.

The broader bet is that tiny machines shouldn’t need a manufacturing process designed separately for every product. Atomic Machines says its Matter Compiler can build three-dimensional devices with moving parts and multiple materials, without fixed molds or masks. Measurements from each production step feed back into the system, which adjusts the build and lets its AI test ideas against physical hardware.

This begins with a concrete component rather than a general-purpose factory sold to outsiders. Conventional mechanical relays carry electricity efficiently but react slowly, while semiconductor switches act quickly and lose more energy as heat. In the company’s proposed hybrid breaker, PrimeSwitch works with a small solid-state bypass to interrupt faults quickly while retaining physical isolation.

The PS-150 is rated for 150 amps of continuous current, 1,500 volts of isolation and 200 micro-ohms of on-resistance in a package 9.5 millimeters wide and 3 millimeters thick, according to Atomic Machines. Those specifications matter because faults in high-voltage direct-current systems can cause damage before a conventional contactor has time to open.

The relay is shipping to unnamed early-access customers for evaluation, so the launch establishes a test program rather than broad commercial adoption. Atomic Machines plans its first public showing at the Open Compute Project Global Summit in San Jose from October 12 through October 15.