MEAN WELL LRS-100-24 Switching Power Supply

LRS-100-24

LRS: Economical ultra-thin enclosed AC-DC switching power supply series (replaces legacy NES/S series)

100: Rated power 100W, max output 108W

24: Nominal DC output 24V

2. Core Electrical Specifications

Input Specifications

AC Input: 85～264VAC universal wide voltage, 47～63Hz

Compatible DC Input: 120～373VDC

Surge Withstand: 300VAC high voltage surge for 5 seconds

No-Load Power Consumption: ＜0.3W, compliant with ErP/DOE Level VI energy efficiency standards

Output Specifications

3. Physical Dimensions & Weight

Overall Dimension: 120(L) × 97(W) × 30(H) mm (1U ultra-thin chassis)

Net Weight: 328g

Cooling: Natural air convection via metal mesh enclosure, fanless silent operation

Mounting: Wall-mounted with screws; DIN rail mounting clip optional

4. Terminal Definition (From Left to Right)
5. FG: Protective Earth (must be reliably grounded for electric shock prevention and EMI reduction)
6. L: AC Live Input
7. N: AC Neutral Input
8. +V: DC Output Positive 24V
9. -V: DC Output Negative 0V
10. VR Trim: Output voltage adjustable potentiometer

Wiring Specifications

AC Side: Complete wiring of L/N/FG; earth wire cannot be omitted

DC Side: For parallel multiple loads, wire gauge of positive/negative terminals shall match total current; reverse polarity connection prohibited

Long-term high voltage input under no-load is strictly forbidden to extend service life

5. Comprehensive Protection Mechanisms (Auto-locking; recover after power cycle)
6. Short Circuit Protection: Constant current limiting; no burnout under sustained short circuit
7. Overload Protection: Activates at 110%～130% load
8. Overvoltage Protection: Locks output when DC voltage reaches 30～33VDC
9. Over-temperature Protection: Auto shutdown upon internal overheating; resumes after temperature drops
10. Environmental & Reliability Performance

Operating Temperature: -30℃ ~ +70℃; derating required above 50℃, max 80% power at 70℃

Storage Temperature: -40℃ ~ +85℃

Altitude: Normal operation up to 5000 meters

Vibration: Passed 5G vibration test, suitable for vehicle & machine tool vibration environments

Warranty: 3-year factory warranty

Burn-in: 100% full-load power burn-in test before delivery

7. Safety Certifications

Domestic: CCC, GB4943.1

International: UL62368-1, CE, TUV, CB, cURus

Compliant with household appliance standard IEC/EN60335-1 and industrial control standard EN62368-1

8. Typical Application Scenarios
9. Industrial Automation: PLC, servo drives, sensors, solenoid valves, 24V relay modules
10. LED Lighting: Equipment indicator lights, small advertising screens, machine tool light strips
11. Security Equipment: Surveillance cameras, access control systems, alarm hosts
12. Instrumentation: Testing meters, small test equipment
13. Smart Home & Small Appliances: Controllers, water pumps, fan power supply
14. Cross-Series Replacement & Upgrade Comparison
15. Legacy Replacement: Direct substitute for NES-100-24 and S-100-24 with smaller size and lower no-load power consumption
16. Enhanced Peak Load Model: LRS-100N2-24, supports 200% peak power for 5 seconds, ideal for motors and impulse loads
17. Higher Power Same Voltage: LRS-150-24 (150W/6.25A), LRS-200-24 (200W/8.3A)
18. High-End PFC Model: HRPG-100-24 with power factor correction, suitable for high-power centralized power supply
19. Usage Restrictions & Precautions
20. Reserve ≥20mm ventilation gap during installation; sealed enclosure is not allowed
21. When ambient temperature exceeds 50℃, load power is recommended not to exceed 80W
22. Reverse polarity on output terminals will trigger protection immediately
23. Parallel connection of multiple units for power expansion is not recommended; current sharing module required if parallel is mandatory
24. FG earth terminal must be grounded; static electricity and interference may damage downstream controllers otherwise

Complete Classification of MEAN WELL Full Product Series (Industrial Sourcing & Selection Version)

MEAN WELL’s six major product lines: Enclosed AC-DC Power Supplies, DIN Rail Power Supplies, LED Drivers, DC-DC Converters, Battery Chargers & DC-AC Inverters, Medical-Grade Power Supplies. Power range covers 0.5W~25600W, widely applied in industrial automation, security, lighting, medical equipment and rail transit.

1. Enclosed AC-DC Switching Power Supplies (Most Commonly Used, LRS Series Included)

Metal mesh enclosure, wall-mounted design, standard 24V/12V DC output for industrial control. Categories: economical non-PFC, built-in PFC, high-power, multi-output, waterproof models.

1.1 Economical Non-PFC Series (Cost-Performance First, No Power Factor Correction)

LRS Series (Flagship Bestseller): 35W~350W

1U ultra-thin 30mm chassis, no-load power consumption ＜0.3W, replaces legacy NES/S series. Model LRS-100-24 (100W, 24V, 4.5A) widely used for PLC, sensors and solenoid valves, 3-year warranty.

RS Series: 15W~150W, compact narrow body, low-power built-in power supply for equipment.

NES/S Series (Legacy Discontinued): Directly replaced by LRS for old equipment retrofits.

NSP Series (New Compact PFC Model): 75W~3200W with built-in active PFC, dedicated for space-limited devices.

1.2 Built-In Active PFC (Low Harmonics, Recommended for Centralized Power & Equipment Rooms)

HRPG Series: 75~1000W, high-efficiency PFC, 5-year warranty, strong peak load capacity for servo systems and high-power industrial cabinets.

USP Series: 150~500W, fanless silent PFC for medical and low-noise equipment.

SE Series: 100~1000W, classic PFC enclosed power supply with favorable cost performance.

1.3 High-Power Rack-Mount & Modular Series (Above 1000W)

HSP/RST: 1000~3000W single high-power output for testing equipment and laser machines.

NMP: 650W/1200W modular medical power supply with combined multi-voltage outputs.

1.4 Multi-Output Series (Dual/Triple/Quad Voltage 5V/12V/24V for Integrated Equipment)

RD/RID dual-output, RT triple-output, RQ quad-output for instrumentation and industrial mainboard power supply.

1.5 Outdoor IP67 Waterproof Series

LPV/LPH: 20~300W potting waterproof design for outdoor LED lamps and outdoor surveillance power supply.

2. DIN Rail Mount Power Supplies (TS35 standard rail for control cabinets, standard for automation)

2.1 New Generation Ultra-Thin Flagship (2025 New Model, 40% Volume Reduction)

XDR Series (Single-Phase High-End): 75~960W, 85~305V wide voltage, 96% efficiency, moisture-proof PCB, parallel expandable, 5-year warranty.

XDR-E Series (Single-Phase Economical): Same dimension with lower cost, 3-year warranty.

XTR Series (380V Three-Phase Input): 240~960W for high-power three-phase grid control cabinets.

2.2 Classic Legacy DIN Rail Models (Widely Used in Existing Projects)

NDR Series: 75~480W mainstream economical DIN rail power supply, replaces DR series; NDR-240-24 (240W, 10A).

DR Series (Legacy Discontinued): DR-120/240; XDR/NDR preferred for new projects.

EDR Series: Economical low-power DIN rail, 75~150W for simple control cabinets.

HDR Series: Ultra-narrow slim type, 15~100W for compact PLC module cabinets.

3. DC-DC Conversion Power Supplies (DC to DC, Vehicle / Railway / Battery Systems)

Input DC12/24/48/110V, isolated conversion for battery backup and rail transit applications

1. SD Series: General metal-enclosed DC-DC, 15~200W for industrial battery redundant power supply.
2. RSD Series (EN50155 Railway Certified): 30~300W on-board power supply for trains and engineering vehicles.
3. DDR Series (DIN Rail DC-DC): Rail-mounted design for cabinet DC step-up/step-down conversion.
4. MDS/MDD Medical-Grade DC-DC: Low leakage current for isolated power supply of medical devices.
5. LED Driver Power Supplies (Lighting-Specific, Constant Current / Constant Voltage, Dimmable & Waterproof)

Constant Voltage Strip Lights (24V LED Strips)

PWM Series: 3-in-1 dimming, DALI dimming for indoor light strips.

Constant Current Luminaires (Street Lights, Panel Lights)

LPF/NPF IP67 waterproof outdoor drivers; PLM compact indoor drivers; HLG high-power street light drivers (40~600W).

5. Battery Chargers & DC-AC Inverters (Energy Storage & Mobile Power Supply)
6. NPB Industrial Smart Charger: 3-stage charging for lead-acid & lithium batteries, applicable to forklifts and energy storage batteries.
7. NPP 2-in-1 (Power Supply + Charger): Automatically charges battery upon mains failure for uninterrupted backup power.
8. NTS/NTU Inverters: DC to AC 220V for RVs and off-grid photovoltaic systems.
9. Medical-Grade Power Supplies (2×MOPP Isolation, Mandatory for Medical Devices)
10. RPS Enclosed Medical Power Supply: 120~500W for hospital beds and diagnostic equipment.
11. NGE Wall Plug Medical Adapters: 12~90W for portable detectors and patient monitors.
12. GSM Desktop Medical Adapters: Power supply for tabletop medical devices.
13. NMP Modular Medical Power Supplies: Multi-channel output for precision medical instruments.
14. Open Frame Bare Board Power Supplies (PCB Soldered Inside Equipment, No Outer Enclosure)

MPS/MDS Series 5~90W, embedded inside devices for small home appliances and instrumentation internal power supply.

8. Quick Selection Comparison of Main Series (Common Industrial 24V Models)