Sun Microsystems PEX668-31 Power Supply SPARC 4 5 20 150W 300-1215 FDK

Sun Microsystems PEX668-31 Power Supply SPARC 4 5 20 150W 300-1215 FDK

The Sun Microsystems PEX668-31 is an OEM workstation power supply manufactured by FDK Fuji Electrochemical Co., Ltd. for the Sun SPARCstation 4, SPARCstation 5, and SPARCstation 20 desktop workstation platforms. It carries Sun part numbers 300-1215-02 and 300-1279-01 and is rated for a maximum continuous output of 150.2W with a short-duration peak of 174.2W.

Specifications & What's Included

• Model: PEX668-31, Rev. BA
• Sun P/N: 300-1215-02 / 300-1279-01
• Manufacturer: FDK Fuji Electrochemical Co., Ltd.
• Input: 100–240V AC, 6.6A, 47–63Hz (universal)
• Outlet: 100–240V AC, 4A, 47–63Hz
• Output: +5V @ 25A
• Output: +12V @ 2.3A (max 4A)
• Output: -12V @ 0.25A
• Total Max Continuous Output: 150.2W
• Total Max Output (<15 sec): 174.2W
• Cooling: Dual internal fans
• Certifications: UL, CSA, TÜV Rheinland
• Manufactured in Taiwan
• Includes: Power supply unit only — no cables or mounting hardware

Applications

The SPARCstation 4, 5, and 20 were Sun Microsystems' mainstream UNIX desktop workstations of the mid-1990s, built around SPARC processors and running SunOS/Solaris. The SPARCstation 20 in particular was a widely deployed engineering and scientific workstation, supporting multi-processor configurations via its dual Ross HyperSPARC or TurboSPARC module slots. These systems saw heavy use in CAD, EDA, scientific computing, and software development environments throughout the 1990s. While largely retired from primary production roles, many SPARCstation systems remain in use today for legacy software compatibility, Solaris testing, and vintage computing. The PEX668-31 is a direct OEM replacement power supply for all three platforms and is one of the more sought-after Sun PSU models for keeping these workstations operational.