Lead Year ESP-2150 150W AT PC Power Supply Compaq 188814-001 236517 P8 P9 Switch

Lead Year ESP-2150 150W AT PC Power Supply Compaq 188814-001 236517 P8 P9 Switch

The Lead Year ESP-2150 is a 150-watt AT-form-factor PC power supply that served as an OEM and replacement unit in Compaq desktop systems. It uses the classic AT output connector scheme — dual P8/P9 motherboard connectors — and supplies DC power to the motherboard and drives via multiple Molex 4-pin peripheral connectors. A separate power cable with an inline rocker/toggle switch handles the AC mains connection. The Compaq spare part label on the chassis cites replacement part number 188814-001; the unit also carries Compaq part number 236517.

Specifications & What's Included

• Manufacturer: Lead Year
• Model: ESP-2150
• Compaq Spare Part Number: 188814-001
• Compaq Part Number: 236517
• Output Power: 150 Watts
• Form Factor: AT (not ATX)
• Motherboard Connectors: P8 and P9 AT-style connectors (labeled)
• Peripheral Connectors: Multiple Molex 4-pin drive power connectors
• Power Input: External power cable with inline rocker power switch included
• Housing: Gray metal enclosure with ventilation grille

Applications

AT-standard power supplies like the ESP-2150 were the dominant desktop PC PSU format through the mid-1990s, used in IBM PC/AT-compatible systems and OEM desktops from manufacturers including Compaq. The AT form factor preceded ATX, and its defining feature was the split P8/P9 motherboard power connector — two separate 6-pin plugs that attached side by side on the AT-style motherboard header. Compaq used AT power supplies in their Deskpro and ProLinea desktop lines of that era, and the 188814-001 spare designation indicates this unit was a direct Compaq-qualified replacement. Today these are primarily sought as replacement parts for vintage AT-era PCs still in service or restoration, and for compatible Compaq desktops from the early-to-mid 1990s that require the specific AT output pinout.