AC/DC Converter LD03-23BxxR2P Series MORNSUN® 3W, AC-DC converter

27 de enero de 2026

Product Overview
The LD03-23BxxR2P series AC-DC converter is one of Mornsun’s compact power converters. It features an ultra-wide AC input range while also accepting DC input voltage, along with low power consumption, high efficiency, high reliability, and reinforced isolation. It offers good EMC performance compliant with IEC/EN61000-4 and CISPR32/EN55032 and meets IEC/EN/UL62368, EN60335, and EN61558 standards. The converters are widely used in industrial, power, home appliances, instrumentation, communication, and civil applications.

Features

Ultra-wide 85 - 305VAC and 100 - 430VDC input voltage range.
Operating ambient temperature range: -40℃ to +85℃.
Up to 78% efficiency.
High power density.
No-load power consumption as low as 0.1W.
Output short circuit and over-current protection.
Plastic case meets UL94V-0 flammability rating.

Certifications: CE Report, RoHS, EN62368-1.

Selection Guide
This series is certified to EN standards.

Model LD03-23B03R2P: Output Power 2W, Nominal Output 3.3V/600mA, Typical Efficiency at 230VAC 70%, Maximum Capacitive Load 1500µF.
Model LD03-23B05R2P: Output Power 2W, Nominal Output 5V/600mA, Typical Efficiency at 230VAC 74%, Maximum Capacitive Load 1500µF.
Model LD03-23B06R2P: Output Power 2W, Nominal Output 6V/500mA, Typical Efficiency at 230VAC 76%, Maximum Capacitive Load 1500µF.
Model LD03-23B09R2P: Output Power 3W, Nominal Output 9V/340mA, Typical Efficiency at 230VAC 76%, Maximum Capacitive Load 300µF.
Model LD03-23B12R2P: Output Power 3W, Nominal Output 12V/250mA, Typical Efficiency at 230VAC 77%, Maximum Capacitive Load 300µF.
Model LD03-23B15R2P: Output Power 3W, Nominal Output 15V/200mA, Typical Efficiency at 230VAC 78%, Maximum Capacitive Load 300µF.
Model LD03-23B24R2P: Output Power 3W, Nominal Output 24V/125mA, Typical Efficiency at 230VAC 78%, Maximum Capacitive Load 200µF.

Input Specifications
Input Voltage Range: AC Input: 85 VAC (Minimum) to 305 VAC (Maximum). DC Input: 100 VDC (Minimum) to 430 VDC (Maximum).
Input Frequency: 47 Hz to 63 Hz.
Input Current: 115VAC: 0.13 A (Maximum). 230VAC: 0.07 A (Maximum).
Inrush Current: 115VAC: 15 A (Typical). 230VAC: 25 A (Typical).
Leakage Current: 0.25mA RMS Maximum at 277VAC/50Hz.
Recommended External Input Fuse: 1A, slow-blow, required. (The actual use needs to be selected according to the application environment).
Hot Plug: Unavailable.

Output Specifications
Output Voltage Accuracy: ±5% (Typical).
Line Regulation: ±1.5% (Typical) at full load.
Load Regulation: ±3% (Typical) from 10% to 100% load.
Minimum Load: 10%.
Ripple & Noise (20MHz bandwidth, peak-to-peak value, 10%-100% load):

3.3/5/6/9/12V outputs at 230VAC Input: 100 mV (Maximum).
3.3/5/6/9/12V outputs at other inputs: 120 mV (Maximum).
15/24V outputs: 200 mV (Maximum).
Temperature Coefficient: ±0.15 %/℃ (Typical).
Hold-up Time: 30 ms (Typical) at 230VAC input.
Stand-by Power Consumption: 0.10 W (Typical) at 230VAC; 0.15 W (Typical) at 115VAC.
Short Circuit Protection: Hiccup mode, continuous, self-recovery.
Over-current Protection: ≥110% of output current (Io), self-recovery.

General Specifications
Isolation (Input-Output): Withstands an electric strength test of 3600 VAC for 1 minute (leakage current <5mA).
Operating Temperature: -40℃ to +85℃.
Storage Temperature: -40℃ to +105℃.
Storage Humidity: Up to 95% RH (non-condensing).
Soldering Temperature: Wave-soldering, Max. 10 seconds: 255℃ (Min.), 260℃ (Typ.), 265℃ (Max.). Manual-welding, Max. 5 seconds: 350℃ (Min.), 360℃ (Typ.), 370℃ (Max.).
Power Derating: From -40℃ to -25℃: 1.33 %/℃. From +70℃ to +85℃ (3.3/5/6/9/12V models): 4.0 %/℃. From +65℃ to +75℃ (15/24V models): 5.0 %/℃. From +75℃ to +85℃ (15/24V models): 1.0 %/℃. For AC input from 85VAC to 100VAC (-25℃ to +85℃): 1.33 %/VAC. For AC input from 85VAC to 115VAC (-40℃ to -25℃): 2.0 %/VAC. For AC input from 277VAC to 305VAC: 0.71 %/VAC.
Safety Standard: EN62368-1 (Report) safety approved. Design reference to IEC/UL62368-1, IEC/EN60335-1, IEC/EN61558-1.
Safety Class: CLASS II.
MTBF: > 300,000 hours per MIL-HDBK-217F at 25℃.

Mechanical Specifications
Case Material: Black plastic, flame-retardant and heat-resistant (UL94V-0).
Dimensions (L x W x H): 37.50 mm x 18.50 mm x 13.60 mm.
Weight: 14.5 grams (Typical).
Cooling Method: Free air convection.

Electromagnetic Compatibility (EMC)
Emissions:

CE: Complies with CISPR32/EN55032 CLASS A.
RE: Complies with CISPR32/EN55032 CLASS A.
For CLASS B compliance, a recommended circuit is required (See design reference).
Immunity:
ESD (IEC/EN 61000-4-2): Contact ±6kV / Air ±8kV. Performance Criteria B.
Radiated RF (RS) (IEC/EN61000-4-3): 10V/m. Performance Criteria A.
EFT/Burst (IEC/EN61000-4-4): ±2kV (typical circuit) / ±4kV (recommended circuit). Performance Criteria B.
Surge (IEC/EN61000-4-5): Line to line ±1kV (typical circuit) / ±2kV (recommended circuit). Performance Criteria B.
Conducted RF (CS) (IEC/EN61000-4-6): 10Vrms. Performance Criteria A.
Voltage Dip, Short Interruption and Variation (IEC/EN61000-4-11): 0%, 70%. Performance Criteria B.

Contact Information
Mornsun Guangzhou Science & Technology Co., Ltd.
Address: No. 8 Nanyun 4th Road, Huangpu District, Guangzhou, China
E-mail: Vic@feisman.cn

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