AC/DC Converter in "305RAC”Family——LSxx-K3BxxSS

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Aiming at miniaturization, light weight, non-isolation trend of IoT and smart home applications, MORNSUN launched ultra-light and compact non-isolated AC/DC power supplies with 1~5W in the "305RAC (reliable under all-conditions)" family——LSxx-K3BxxSS. The series with 5W is only 16.13  15.10  9.50mm, and it also features low consumption of 0.1W and high efficiency of 77%.


1) Miniaturization and light weight

The dimensions is only 16.13  15.10  9.50mm, and the weight is only 4.5g, which greatly improves the space utilization for customers.

2) Wide input voltage: 85 - 305VAC/70-430VDC

This series meets global voltage requirements such as 110/220/277VAC standard voltages;

3) All-rounder periphery

The series shoot customer's troubles with the all-matching core design with a flexible peripheral circuit. By adopting different peripheral circuits, the series can be used in almost all applications including low-cost consumer products and even high-end power for the extremely harsh outdoor environments.

4) Low consumption and high efficiency

a. No-load consumption as low as 0.1W;

b. The efficiency up to 77%.


It is widely used in non-isolated application of the IoT and smart homes, such as motor control, relay control, microcontroller, etc.


  • Ultra-wide input voltage: 85 - 305VAC/ 70 - 430VDC
  • Operating temperature range: -40ºC to +85ºC
  • Compact size, open frame
  • The efficiency up to 77%
  • Industrial-grade design
  • Flexible selection of EMC additional circuits, simplify customer PCB layout
  • Output short circuit, over-current protection
  • EN62368 safety approval