How to meet the ever-changing needs for diverse market requirements in different industries is challenging to many AC/DC power supply manufacturers. The conventional 85 VAC to 264 VAC input AC/DC power supplies has difficulty meeting all working conditions in terms of higher input voltage, temperature, humidity, altitude, and EMI.

As an experienced power supply manufacturer, MORNSUN has expanded to include its 305RAC collection of AC/DC power supplies with an input range of 85 VAC to 305 VAC to address these issues. The 305RAC family is specially designed to handle voltage fluctuation and transient easily. No matter what harsh conditions throw at it, it can deliver higher capability, reliability and performance.

What is the MORNSUN 305RAC Family AC to DC Converter?

In the product name, "RAC" is used as an abbreviation for "Reliable under all conditions", a guarantee of peak performance under different circumstances. MORNSUN 85-305VAC Input AC/DC converters ensure the stable and reliable performance under almost any harsh conditions.

Best-in-class performance. Handle the voltage fluctuation easily. High-input-voltage capability, high-low-temperature reliability, high-humidity reliability, high-altitude reliability and good EMC performance under almost any harsh conditions.

  • ● The MORNSUN 305RAC Family can handle voltage fluctuations easily and features best-in-class performance;
    ● It provides optimal performance even in high-input-voltage, high-low temperature, high-humidity, and high-altitude environments;
    ● It is designed for a good EMC performance even under the harshest working conditions.
Voltage Fluctuation

Input voltage may
rise over 264VAC caused
by load change or
source powered by
a generator

High Altitude

Operating altitude
up to 5000m
Passed altitude test:
aging, etc

High/Low Temperature

Low temperature:
-25℃ to -40℃
High temperature:
70℃ to 80℃


Passed humidity test:
cyclic test, high
humidity test, constant
temperature & humidity test



Why Should You Choose the MORNSUN 305RAC Family AC to DC Converter?

There are several reasons to choose the MORNSUN 305RAC AC to DC Converters, and here are some key highlights:
●   High ability in resisting public power grid voltage fluctuations
●   Peak performance even at high-altitude environments (up to 5000m)
●   Reliable performance even at extreme temperatures (from -40°C to +80°C)
●   High ability to resist cyclic, extreme, and constant humidity
●   Good EMI performance (CISPR32/EN55032 CLASS B)

We will now review each point in details:

  • Large voltage fluctuations can cause damage to the electrolytic capacitor inside the power supply, especially when the power comes from a generator. The input voltage range of the MORNSUN 305RAC (85-305VAC) ensures that the module is not damaged by any voltage fluctuations.

Design and Verification of MORNSUN AC DC Power Supply Module

The reliability and performance of our 305RAC Family AC DC power supply module rank as one of the top value propositions we are proud to offer. Given to the design optimization allied with qualified components contributes to reliable performance, our technical engineers adopt optimal circuit topologies in order to reduce voltage, current and thermal stress on build-in components. Besides selecting the correct grade of components in terms of expected operating conditions, our engineers significantly take a close look at verifying the ability of high withstand voltage and derating of voltage stress of the key components such as filter, capacitor, MOSFET, diode, etc.

Design optimization and verification for the harsh environment are applied to the design and manufacturing process of the 305RAC Family. Thus, it significantly guarantees the reliability of the modules, and the components inside have enough margin of voltage stress.

Test 1: Vin=321 Vac

MOSFET: rated = 650V, actual stress(Max) = 610V
Diode: rated=150V, actual stress(Max) = 120V

Test 2: Lightning/Surge lmmunity

Electrolytic capacitor: actual stress(Max)=341.8V
MOSFET: actual stress(Max)=563V
Diode: actual stress(Max)=124V
Test of AC/DC power supply LM150-23Bxx Series

Power Solution for Different Scenarios

Typical Applications
Common Challenges and Demands
Our Solutions
DC Charging Points
New products
Street Lighting Controllers
New products
Protective Relays
New products
Fluctuations in Voltage
Fluctuations in Temperature and Humidity Levels
Electromagnetic Interference
Remote and Harsh Environments at High Altitudes
Other unstable outdoor weather and environment conditions
Miniaturization trend
LD-R2 series
LD-R2 series

305RAC Family Product Portfolios

By meeting all the above challenges, MORNSUN 305RAC AC/DC family is ideal for a wide range of applications, such as industrial control, charging stations, IoT, electric power, instruments, security, communications, and smart homes, etc.


15-750W AC/DC Enclosed Switching Power Supply LM/LMF Series

With input voltage of 85-305 VAC, MORNSUN AC-DC enclosed switching power supplies LM/LMF series are ideal for a wide range of industries such as industrial control, EV charging station, IoT and medical, LED, electric power, smart home, etc. Learn more

120W Ultra Slim AC/DC DIN-Rail Power Supply LI Series

Low-cost ultra-slim 120 Watts AC-DC DIN-Rail power supplies LI series with PFC feature high efficiency up to 91% coupled with an adjustable output voltage and low standby power consumption, is perfectly suited for applications with limited space. Learn more

3-90W Compact AC/DC Converter LD/LD-R2 Series

Deliver wide input voltage of 85 VAC to 305 VAC, and 4kVac reinforced isolation, LD-R2 series are suited for OVC III applications and meets EMI class B without external components. Learn more

1-15W Miniature All-Rounder AC/DC Converter LS-R3 Series

MORNSUN miniature, high efficient AC-DC converter LS-R3 series is capable to simplify complex power design with flexible peripheral circuits while saving cost. The products are ideal for a wide range of applications. Learn more

1-5W Non-isolated AC/DC Converter LS-K Series

Certify to EN62368, compact LS-K series enables to simplify the PCB layout of the system with a flexible selection of EMC additional circuits. Learn more

3-120W Open-frame AC/DC Converter LO series

LO series offers good EMC performance compliant to IEC/EN61000-4, CISPR32/EN55032 and meets UL/EN/IEC62368 standards. They are widely used in industrial, office and civil applications. Learn more

5-60W High-reliable AC/DC Converter LH series

Compact AC/DC converters LH series have various options of multiple I/O voltage combinations and multiple protections. The optional format including PCB mount, chassis mount, DIN Rail is available. Learn more

305RAC Family Video

Mornsun 15-350W AC/DC Enclosed Switching Power Supplies
Introduction of 305RAC AC-DC Converter
Mornsun 15-350W AC/DC Enclosed Switching Power Supplies
Enclosed SMPS LM-23B Family

MORNSUN - Power Supply Manufacturer

Technical team. Our R&D engineers at MORNSUN have designed the 305RAC AC/DC Converter Family catering to the various needs of your power systems. The collections is ideal for applications with higher requirements for stable operation under multiple harsh conditions. You can choose one or more of our advanced and cost-efficient components, from board mount AC/DC converters and enclosed switching power supplies to DIN Rail power supplies. Guided by the service principle of "trustworthy", MORNSUN offers the best products, fast and local service, and efficient pre-sales and after-sales support for clients worldwide.

MORNSUN provides professional power supply services. Backed by a perfect management system that consists of advanced research technology, a high-quality raw material platform, advanced equipment, excellent manufacturing process management, specialized screening sequence on reliability and rich experience, each solution from MORNSUN is designed to improve the stability, safety, and reliability of your power system.

Contact us now to request a sample and a quotation!

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