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Scalable Solid-State Circuit Breaker (SSCB)

Award Information

Department of Defense
Office of the Secretary of Defense
Award ID:
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
SemiSouth Laboratories
201 Research Blvd. Starkville, MS -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2008
Title: Scalable Solid-State Circuit Breaker (SSCB)
Agency / Branch: DOD / OSD
Contract: W56HZV-09-C-0159
Award Amount: $99,935.00


Solid-state circuit breakers have significant advantage over electromechanically relays due to the use of various types of solid-state transistors used to control the power flow. These transistors are generally much faster than their mechanical counterparts, switching orders of magnitude, hence allowing superior fault isolation capabilities. Unfortunately, the currently available current and voltage range of solid-state circuit breakers do not cover the specifications for the MEA or Army hybrid vehicle requirements. The limitations of the current solid-state relays are inherent to the fact that the switching transistors are built upon silicon technology. Silicon Carbide (SiC) JFET technology from SemiSouth has the ability to dramatically eliminate this current limitation, and impact near-term revolutionary system insertion opportunities. The optimal solution will be to develop a complete Solid State Circuit Breaker based on this innovative, reliable, scalable SiC Vertical JFET technology. During this Phase I program, SemiSouth will develop leverage existing Air Force funded development and prototype funding of large area 800V/20A SiC VJFET devices to build a prototype 600V/50A SSCB module and provide complete characterization of the module's electrical characteristics and thermal design space in anticipation of scaling the VJFETs and SSCB design to 1200V and 200A+.

Principal Investigator:

David C. Sheridan
Director of Engineering

Business Contact:

Brenda J. Temple
Contract Administrator
Small Business Information at Submission:

201 Research Blvd. Starkville, MS 39759

EIN/Tax ID: 010568116
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No