Semiconductor switching
SiC-based power electronics provide the switching foundation for rapid DC fault interruption.
800VDC · SOLID-STATE CIRCUIT PROTECTION
AI moves fast.
Protection must
move faster.
Microsecond fault interruption for the next generation of AI data center power distribution.
Built on an existing 800V / 250A working prototype.
SELECTIVE PROTECTION800VDC
<3 μs
Fault interruption
ProTac validated performance
Functional illustration · System coordination required
800VDC
Prototype voltage
250A
Working prototype
200kA
Breaking capacity
99.9%
Efficiency
01 / PRODUCTS
A solid-state platform.
A focused path to market.
Starting with 800VDC protection, ProTac brings semiconductor switching, sensing and control together in one circuit protection system.
WORKING PROTOTYPE
800VDC / 250A SSCB
Our starting point for AI infrastructure protection: an operating prototype that combines fast fault interruption with digital control.
- Interruption time
- <3 μs
- Breaking capacity
- 200kA
- Efficiency
- 99.9%
- Electrical operations
- 1 million
Performance values reflect ProTac’s validated engineering results. Initial UL certification is planned for 125A and 250A; UL certification is not yet represented as complete.
02 / TECHNOLOGY
Control the energy.
Contain the fault.
Source-side current limiting and branch-level interruption perform different jobs. A coordinated system needs both functions.
SOURCE
Power conversion
An SST or other converter controls energy delivered to the DC bus.
DISTRIBUTION
800VDC bus
Stored energy on the bus can continue to feed a downstream fault.
PROTAC SSCB
Branch protection
Fast, selective interruption disconnects the faulted circuit.
LOAD
AI infrastructure
Coordinated protection helps limit disruption to healthy circuits.
Protection close to the fault
Sensing, gate drive and local analog protection work alongside digital logic for fast response.
Software with a defined role
U.S.-developed firmware supports configuration, coordination and diagnostics. Critical protection operates locally.
APPLICATION FOCUS
Built around the
AI power chain.
Rack power distribution
Fast branch protection where high-density computing meets DC power.
Busway & tap-off
Selective protection at distribution points feeding critical loads.
Feeder protection
A higher-current development roadmap for the next levels of distribution.
03 / MANUFACTURING STRATEGY
Global manufacturing.
U.S. integration.
Our planned operating model pairs specialist module manufacturing with U.S. software engineering, final assembly and routine testing.
CHINA MODULE PRODUCTION
Three modules.
Specialist partners.
- SiC power-module packaging
- Control-module PCBA
- Protection-module PCBA
Initial production through partners and contract manufacturers, with partner equipment and tools sought for the power module.
UNITED STATES INTEGRATION & TEST
Assembly. Software.
Accountability.
- U.S.-engineered firmware and software installation
- Final product assembly
- Routine end-of-line testing
Planned Rhode Island facility in a leased warehouse, converted for assembly and test operations.
Qualification strategy
Initial UL certification scope: 125A and 250A. Specialized life, high-energy short-circuit, overload and qualification testing will be outsourced.
04 / COMPANY
Industrial experience.
A new protection mission.
ProTac Electric Co. is a U.S. company developing solid-state circuit protection for AI data center infrastructure.
KL
KimLee Law
Chief Executive Officer
Industrial leadership, operations and capital deployment, with experience at Eaton / Cooper, GE and GIC.
DJ
Doug Jiang
Chief Operating Officer
Data center infrastructure and finance. CEO of DJI Energy Corp and former President of Discover AI LLC.
DX
Linghe “Daniel” Xu
Chief Technology Officer
Product development and electrical equipment experience spanning Cooper, Eaton and industrial design.
JD
Jason Dodier
Chief Commercial Officer
Energy and infrastructure commercialization. Co-founder of Grain Ecosystem; former Schneider Electric and AlphaStruxure executive.
LZ
Leo Zhang
SVP, Asia Pacific
Regional leadership at GE and Cooper, with entrepreneurial experience in power equipment and control systems.
GL
Dr. Guangyin Lei
Chief Advisor · Board of Advisors
Power electronics and packaging expertise. Virginia Tech PhD, with automotive industry experience at Ford and NIO.
Does an SST replace an SSCB?
No. In the architecture described here, source-side current limiting reduces continued energy injection. Branch protection interrupts the fault path, including current supplied by downstream stored energy. Selection and coordination depend on the actual system.
What is available today?
ProTac has an 800V / 250A working prototype. The initial UL certification plan covers 125A and 250A. Higher-current products are on the development roadmap; the site does not represent them as shipping products.
Is fast interruption the same as safety isolation?
Semiconductor turn-off interrupts current but does not itself provide a mechanical isolation gap. Isolation mechanisms and the applicable safety requirements must be addressed at product and system level.