LM323 Regulator Replacement

We have been working on a switch mode replacement for the now hard to get LM123, LM323 and other TO-3 5v regulators. Our replacement is capable of higher current and has much tighter tolerances than the original regulators and being switchmode runs a lot cooler.


  • Input Voltage: 7 - 34V
  • Output Voltage: 5v fixed (4.94 - 5.06)
  • Output Current: 4.25A continuous
  • Package Case: TO-3
  • Protection: Hiccup-Mode overload, Over Temperature, Short Circuit, Over Current, Under Voltage Lockout
  • Low Ripple: Measured at less than 40mV at full load

These regulators are available for sale on eBay

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