AC/DC 150W Enclosed Switching Power Supply - LM150-20Bxx Series

23 de enero de 2026

Product Overview
The LM150-20Bxx series is one of MORNSUN’s enclosed AC-DC switching power supplies. It features universal AC input and simultaneously accepts DC input voltage. This series is cost-effective, with low no-load power consumption, high efficiency, high reliability, and double or reinforced insulation. These converters offer excellent EMC performance, complying with IEC/EN61000-4, CISPR32/EN55032, UL/IEC/EN62368, EN60335, EN61558, and GB4943 standards. They are widely used in industrial, LED lighting, street light control, security, telecommunications, smart home, and other applications.

Key Features

Universal 85–264VAC or 120–370VDC input voltage.
Accepts AC or DC input (dual-use of the same terminals).
Operating ambient temperature range: -30°C to +70°C.
Low standby power consumption and high efficiency.
High I/O isolation test voltage up to 4000VAC.
Low ripple and noise.
150% peak power lasting for 5 seconds.
Protections: Output short circuit, over-current, over-voltage, and over-temperature.
OVC III (designed to meet EN62477).
Suitable for operation at altitudes up to 5000 meters.
3-year warranty.

Selection Guide
The series includes the following models, all EN/BS EN/CCC certified:

LM150-20B12: Output Power: 150W; Nominal Output: 12V / 12.5A; Voltage Adjustable Range (ADJ): 10.2–13.8V; Typical Efficiency at 230VAC: 86%; Maximum Capacitive Load: 10000 uF.
LM150-20B15: Output Power: 150W; Nominal Output: 15V / 10.0A; Voltage Adjustable Range (ADJ): 13.5–18.0V; Typical Efficiency at 230VAC: 87%; Maximum Capacitive Load: 6000 uF.
LM150-20B24: Output Power: 156W; Nominal Output: 24V / 6.5A; Voltage Adjustable Range (ADJ): 21.6–28.8V; Typical Efficiency at 230VAC: 88%; Maximum Capacitive Load: 2400 uF.
LM150-20B36: Output Power: 154.8W; Nominal Output: 36V / 4.3A; Voltage Adjustable Range (ADJ): 32.4–39.6V; Typical Efficiency at 230VAC: 88%; Maximum Capacitive Load: 1200 uF.
LM150-20B48: Output Power: 158.4W; Nominal Output: 48V / 3.3A; Voltage Adjustable Range (ADJ): 43.2–52.8V; Typical Efficiency at 230VAC: 89%; Maximum Capacitive Load: 600 uF.

Notes:

Use suffix ‘Q’ for conformal coating.
If a terminal cover is required, please order “PJA-033” for self-installation.
The product picture is for reference only. Please refer to the actual product for details.

Detailed Specifications
Input Specifications:

Input Voltage Range: AC Input: 85–264 VAC; DC Input: 120–370 VDC.
Input Frequency: 47–63 Hz.
Input Current (Max.): 4.0 A at 115VAC; 2.0 A at 230VAC.
Inrush Current (Max.): 30 A at 115VAC; 60 A at 230VAC.
Leakage Current: < 0.75 mA at 240VAC.
Hot Plug: Unavailable.

Output Specifications:

Output Voltage Accuracy: ±1% (Typical, under normal/high temperature; accuracy at low temperature specified separately).
Line Regulation: ±0.5%.
Load Regulation: ±0.5%.
Ripple & Noise: 150 mVp-p (Max.) for all models, measured with 20MHz bandwidth using the "Tip and barrel method" (output parallel 47uF electrolytic and 0.1uF ceramic capacitor).
Temperature Coefficient: ±0.03%/°C.
Minimum Load: 0%.
Standby Power Consumption: 0.5 W (Max.).
Hold-up Time: 8 ms (Min.) at 115VAC; 16 ms (Min.) at 230VAC.
Protections:
- Short Circuit: Hiccup mode, continuous, self-recovering (recovers within <5s after fault clearance).
- Over-current: ≥110% Io for >5 seconds, output turns off and self-recovers after restarting.
- Over-voltage (Hiccup mode, self-recover after fault clearance): 12V model ≤18VDC; 15V model ≤21.75VDC; 24V model ≤33.6VDC; 36V model ≤48.6VDC; 48V model ≤60VDC.
- Over-temperature: Output voltage turns off, self-recovering.

General, Safety & Mechanical Specifications:

Isolation Voltage: Input-Output: 4000 VAC for 1 min (leakage current <10mA); Input-Chassis: 2000 VAC; Output-Chassis: 1250 VAC.
Insulation Resistance: ≥100 MΩ (test voltage: 500VDC).
Operating Temperature: -30°C to +70°C.
Storage Temperature: -40°C to +85°C.
Operating/Storage Humidity: 20–90% RH / 10–95% RH (non-condensing).
Switching Frequency: 65 kHz (Typical).
Power Derating: Temperature derating for 12V model: 2%/°C from +45°C to +70°C; for 15V/24V/36V/48V models: 2.5%/°C from +50°C to +70°C. Input voltage derating: 1.33%/VAC from 85VAC-100VAC.
Safety Standards: Pending. IS13252 (Part1), GB4943.1 safety approved & EN60335-1, EN61558-1, EN61558-2-16, EN/BS EN62368-1 (Report); design refers to UL/IEC62368-1.
Safety Class: CLASS I.
MTBF: >300,000 hours (MIL-HDBK-217F @25°C).
Vibration: Complies with GB2423.10, IEC60068-2-6 (10-500Hz, 5g, three axes).
Warranty: 3 years (ambient temperature <45°C).
Case Material: Metal (AL1100, SGCC).
Dimensions: 159.00 x 97.00 x 30.00 mm.
Weight: 410g (Typical).
Cooling Method: Free air convection.

EMC Performance & Application Notes:

Emissions: Complies with CISPR32/EN55032 CLASS B for Conducted (CE) and Radiated (RE) Emissions; IEC/EN61000-3-2 CLASS A for Harmonics (at ≤80% load).
Immunity: Complies with multiple IEC/EN61000-4 standards: ESD (Contact ±6kV/Air ±8kV, Criteria A), RS (10V/m, Criteria A), EFT (±4kV, Criteria A), Surge (Line-Line ±2kV/Line-PE ±4kV, Criteria A), CS (10V, Criteria A), and Voltage Dips/Interruptions (Criteria B).
Application Notes:
1. For AC input between 85–100VAC or DC input between 120–140VDC, output power must be derated according to the temperature derating curves.
2. Suitable for natural air cooling; for closed environments, consult MORNSUN FAE.
3. Derating of 5°C per 1000m is required for operating altitude above 2000m.
4. The metal case must be connected to the system's Protective Earth (PE) during operation.
5. The output voltage can be adjusted via the ADJ potentiometer (clockwise to increase).

Dimensions and Pinout

Pin 1: AC(L)
Pin 2: AC(N)
Pin 3: +V
Pin 4, 5, 6, 7: +Vo (Output positive terminals)
Pin 8, 9: -Vo (Output negative terminals)

Mounting and Wiring

Mounting Screws: M5 (max length 5mm, torque 0.4N·m) or M3 (max length 3mm, torque 0.4N·m).
Recommended Wire Range: Input: 20–10 AWG (16–10 AWG for pin 3). Output: 12V/15V: 14–10 AWG; 24V/36V: 18–10 AWG; 48V: 20–10 AWG.
Output Connector Tightening Torque: Max 0.8 N·m for M3.5.

Contact for Support
For technical inquiries or further information, please contact: Vic@feisman.cn

Regresar al blog