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 at a glance:
● 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:
high/low-temperature,
aging, etc

High/Low Temperature

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

Humidity

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

EMI

Lightning/Surge
Immunity:
IEC/EN61000-4-5
EMI: CISPR32/
EN55032
CLASS B

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:

Withstand voltage fluctuations easily
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.

Peak performance even in remote and harsh environments at high altitudes
AC/DC power supplies are often used in remote and harsh environments where the altitude exceeds 2000m or even 5000m. The 305RAC Family has passed a Family of tests to verify its reliable operation even in high-altitude environments.

Reliable performance even at extreme temperatures and humidity levels
The reliability of AC/DC power supplies is essential when dealing with significant temperature swings. The typical working environment for industrial equipment is -25°C to +70°C. However, some environments are more prone than others to severe temperature changes and AC/DC power supplies need to keep pace with the changeful environmental variables. The 305RAC Family can uphold reliable operations at working temperatures ranging from -40°C to +80°C. It has also passed a Family of humidity tests, including alternating temperature and humidity test, high temperature and high humidity test, constant temperature and humidity test, and more.

Susceptibility to Conducted Voltage Disturbances and EMI
Electromagnetic Interference (EMI) is always a potential problem with switched-mode power supplies - both AC-DC and DC-DC converters - by virtue of their inherent design characteristics. As an engineer, you may be familiar with the several benefits of switched-mode converters, including high efficiency with small size and weight. However, many engineers also struggle with the electrical noise they produce. Each of the 305RAC AC to DC converters can withstand the transient surge impact generated from electromagnetic interference conditions, including lighting and surge. Their EMI has also been tested to meet Class A/B standards with a good margin.

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

Power Solution for Different Scenarios

Typical Applications

Common Challenges and Demands

Our Solutions

DC Charging Points Street Lighting Controllers Protective Relays

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

LMxx-23Bxx LD-R2 series LMF320-23B12 LO30-23B12E

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

Introduction of 305RAC AC-DC Converter

Enclosed SMPS LM-23B Family

305RAC Family Brochure