MEAN WELL Alimentatore SDR-480-24

MEAN WELL SDR-480-24 DIN Rail Mounted Switching Power Supply

Key Distinction: SDR-480-24 vs SDR-480P-24

SDR-480-24: Versione standard, without active current sharing parallel function, for single unit independent operation

SDR-480P-24: Parallel version, supporta fino a 4 units in parallel for power expansion / N+1 redundancy. Select the P suffix for high-power multi-unit applications

1. Core Electrical Specifications
2. Output Ratings

Tensione nominale: 24VCC, adjustable range 22.8~26.4VDC (tuned via VR potentiometer on unit side)

Corrente nominale: 20UN; Potenza nominale: 480W

Peak Load: 150% (30UN / 720W) per 3 secondi, compatible with motor and servo startup inrush current

Ripple & Rumore: ≤240mVp-p (20MHz bandwidth)

Voltage Accuracy: ±1%; Line/Load Regulation ≤0.5% each

DC OK Relay: Passive contact, closes when output normal, opens under undervoltage; available for system alarm / controllo dell'interblocco

2. Input Ratings

AC Input: 90~264VAC universal single-phase, 50/60Hz

Compatible DC Input: 127~370VDC

Built-in active PFC, power factor PF＞0.94, complies with harmonic standard EN61000-3-2

Max full-load efficiency up to 94%, bassa generazione di calore; input inrush current suppression design

3. Complete Protection Mechanisms (Full-range Protection)
4. Protezione da cortocircuito: Constant current limiting, auto-recovery
5. Protezione da sovraccarico: Current limiting at 110%~150%, shut down and restart after exceeding 3 secondi
6. Protezione da sovratensione: Cut off output at 30~33VDC
7. Over-temperature Protection: Power derating under internal overheat; full lockout at severe overheat, recovers after cooling

III. Meccanico & Specifiche ambientali

1. Dimensioni complessive: W 85.5 × H 125.2 × D 128.5 mm
2. Peso: 1.6kg
3. Montaggio: Standard DIN rail TS-35/7.5 / TS-35/15
4. Raffreddamento: Natural air convection, enclosed non-ventilated cabinets are prohibited
5. Temperatura operativa: -25℃ ~ +70 ℃; power derating required above 50℃
6. Temperatura di conservazione & Umidità: -40~+85℃, 10~90%RH non-condensing
7. MTBF: ≥169,300 hours (full load at 25℃)
8. Garanzia: 3-year original manufacturer warranty
9. Sicurezza & EMC Certifications

Certificazioni di sicurezza

UL508, TÜV, CB, CE, GL Marine Approval, EN62368-1, SEMI F47 Semiconductor Standard

Compatibilità elettromagnetica

Emissione: EN55022 Class B (low industrial interference)

Immunità: Heavy industrial grade EN61000-6-2, compliant with ESD, surge and EFT test criteria

Withstand Voltage

Input ↔ Output: 3kVAC

Input ↔ Ground: 2kVAC

Output ↔ Ground: 0.5kVAC

1. Scenari applicativi tipici
2. Centralized power supply for PLCs, servo drives and sensors on automated production lines
3. Main DC power supply for CNC machine tools and robot control cabinets
4. High-power systems for security monitoring, access control and vehicle barriers
5. Control cabinets for AGVs and logistics equipment in intelligent warehouses
6. Semiconductor equipment and photovoltaic auxiliary control boxes (SEMI F47 compliant)
7. 24VDC power supply for building automation and fire linkage systems
8. Equivalente & Alternative Model Comparison

Same Power Same Series

SDR-480-48: 48V/10A/480W, for high-voltage DC loads

SDR-480P-24: Parallel-capable model, first choice for multi-unit expansion / N+1 redundancy

Same Power Competitor Replacements (Direct DIN rail compatible)

1. MEAN WELL DRS-480-24: Charging model with 3-stage battery charging curve
2. MEAN WELL DRP-480-24: Older generation without PFC, poor power factor; SDR is preferred for new projects
3. Schneider ABL2REM24020K: 24V 20A DIN rail power supply, slightly wider dimension
4. Siemens SITOP PSU300C 24V/20A

Lower Power Alternatives (Cost-effective for light loads)

SDR-240-24 (240W/10A), SDR-120-24 (120W/5A)

VII. Cablaggio, Installazione & Linee guida per la messa in servizio

1. Definizione del terminale

L/N: AC Live & Neutro; FG: Terra protettiva (must be reliably grounded to reduce EMI)

+V/-V: 24Uscita VCC; ADJ: Voltage adjustment potentiometer

DC OK: Passive relay signal (contatto secco, nessun alimentatore integrato)

2. Voltage Adjustment: Turn clockwise to raise output voltage, max 26.4V; avoid long-term full load above 24V
3. Cooling Requirements: Reserve ≥20mm ventilation gap top and bottom; space out multiple units side-by-side; derate output by 20% for high-temperature environments
4. Parallel Prohibition: Standard SDR-480-24 has no current sharing circuit. Parallel connection of multiple units causes uneven current distribution and overheating damage. Select SDR-480P-24 for power expansion.

VIII. Common Fault Troubleshooting Matrix

1. Selezione & Sourcing Recommendations
2. Single unit independent load, no expansion demand → SDR-480-24 (conveniente)
3. Multi-unit parallel operation, N+1 redundancy, high-power expansion → SDR-480P-24
4. Lead-acid / lithium battery charging required → DRS-480-24 dedicated charging model
5. Basso / high temperature enclosed cabinets: Prenotare 30% power margin, install cooling fans

Full-dimensional Core Advantages of MEAN WELL Power Supplies

Based on the SDR-480-24 DIN rail industrial power supply in use, advantages are categorized into six segments: Technical Performance, Affidabilità & Quality, Product Portfolio, Conformità & Certificazioni, Supply Chain & After-sales, Costo & Engineering Adaptability. Differentiated strengths versus domestic generic brands and equivalent industrial power supplies from Schneider/Siemens are listed below:

1. Superior Technical Performance (Core for Industrial On-site Application)
2. Wide Input Range + Active PFC for Unstable Grid Conditions

Mainstream models support 90~264VAC universal input, stable operation under voltage fluctuation / low voltage conditions in rural areas and factories; compatible with 127~370VDC DC input for photovoltaic and energy storage systems.

Medio & high-power DIN rail series (SDR/DRP/NSP) equipped with built-in active PFC, PF＞0.94, meeting EN61000-3-2 harmonic standards. Simultaneous operation of multiple power supplies will not trigger circuit breakers or pollute the grid; generic brands without PFC often lead to factory power factor penalties.

Take SDR-480-24 as example: Full-load efficiency reaches 94%, far lower heat generation than ordinary power supplies, reduces cabinet temperature rise and extends overall equipment service life.

2. Robust Instant Overload Capacity for Servo & Motor Inrush Loads

All series feature standard 130%~150% peak load for 3 secondi (SDR-480 supports 150% / 30UN). Servo startup, solenoid valve bank and motor instantaneous surges will not trigger immediate shutdown; most competing products only support 110% short-time overload, prone to tripping and restarting under load.

3. Comprehensive Multi-stage Protection to Eliminate Equipment Burnout Risks

Standard four independent protection functions: Cortocircuito / Sovraccarico / Sovratensione / Overtemperature

Cortocircuito: Constant current hiccup auto-recovery, no power cycle required

Overtemperature: Power derating first, full lockout upon severe overheat, auto-reset after cooling

Overvoltage cuts off output to avoid burnout of PLCs, servos and sensors

Premium SDR-P parallel models additionally support N+1 redundant current sharing; single unit fault will not disrupt the whole system.

4. Low Ripple & Strong EMC Immunity for Flawless Precision Equipment Operation

Strictly controlled ripple noise: ≤240mVp-p for 24V models, no interference to vision inspection systems, encoders and high-precision sensors

Most models achieve EMC Class B, ESD, surge and EFT immunity compliant with heavy industrial standard EN61000-6-2. Cabinets dense with inverters and contactors rarely suffer PLC communication garble or signal drift.

5. Abundant Industrial-specific Functions (Represented by SDR Series)

Built-in DC OK dry contact relay for system fault alarm and equipment interlock

Adjustable output voltage (22.8~26,4 V) to compensate voltage drop for long-distance wiring

Slim metal housing with natural convection cooling; fanless versions eliminate dust blockage failures; high-power variants adopt temperature-controlled silent fans

Universal standard TS-35 DIN rail mounting; cabinet mounting holes require no modification when replacing Schneider or Siemens DIN rail power supplies.

1. Quality & Service Life Advantages (Reduce Long-term Project Maintenance Costs)
2. High-grade Component Selection

Uniformly adopt 105℃ long-life electrolytic capacitors, original TI/ON drive ICs and premium MOSFETs; low-cost inferior capacitors are rejected to fundamentally reduce bulging and electrolyte leakage failures.

2. Rigorous Factory Testing

100% full-load burn-in test for every unit, plus 5G vibration, high-low temperature cycling and humidity-heat testing. Typical MTBF exceeds 100,000 ore, premium series reach 160,000+ ore, vastly superior to domestic generic brands with only 30,000~50,000 hours MTBF.

3. Unified Warranty Policy

3-year original manufacturer warranty for all industrial DIN rail and enclosed power supplies; 5-year warranty for medical and green energy series. Most niche brands only offer 1-year warranty, while imported premium brands cost double with identical 3-year warranty.

4. Basso tasso di fallimento

Consistently low annual defect rate for mature series, widely deployed in mass automated production equipment with stable operation for 3~5 years without breakdowns, drastically cutting after-sales on-site repair expenses.

III. Full-coverage Product Portfolio for One-stop Sourcing (Maximum Convenience for Engineering Procurement)

Sopra 15,000 standard global models across 12 complete product lines, covering all power supply demands of complete equipment under one brand:

1. DIN Rail Series: SDR/NDR/DRP (industrial control cabinets, including your SDR-480 series)
2. Enclosed AC-DC Series: LRS/NSP/SE (centralized power supply for equipment enclosures)
3. Guida DIN / On-board DC-DC Converters: RSD, SD (on-board vehicle, DC-DC step-down)
4. Specialized lines: MSP medical power supplies, RSD railway power supplies, DRS charging power supplies, Driver LED, high-power rack supplies, modular power supplies, ecc.

Benefit: All AC-DC main power and DC-DC secondary step-down units of one device use the same brand, eliminating multi-supplier procurement; unified support for drawing design selection and after-sales service.

1. Complete Global Safety Certifications for Trouble-free Bidding & Esportare
2. Mandatory domestic certification: CCC
3. Universal international certifications: UL, TÜV, CB, CE
4. Industry-specific certifications: Industrial UL508, Medical 2MOPP, GL Marine Approval, Semiconductor SEMI F47, Railway EN50155

All certification documents downloadable from official website, fully applicable to foreign trade equipment, government projects, export customs clearance and third-party inspection. Most generic brands only hold basic CE certification and fail high-end factory audits.

1. Supply Chain & Delivery Advantages
2. Ample Stock Availability

95% standard models available for shipment within 24 ore; multiple manufacturing bases in Guangzhou, Suzhou and Taiwan maintain permanent inventory, avoiding multi-month lead times of imported brands.

2. Comprehensive Technical Support

24-hour original manufacturer technical support; provision of datasheets, schemi elettrici, parallel connection schemes and EMC rectification recommendations. Standardized solutions for SDR-480P parallel redundancy, long-line voltage drop and high-temperature derating.

3. Mature Distribution Network

Authorized distributors cover all provinces nationwide, convenient for bulk purchasing, sample acquisition and after-sales replacement.

4. Flexible Customization

Minor modifications available including voltage fine-tuning, remote on/off control, special terminals and three-proof coating with short customization lead time.

1. Cost-performance Comparison Advantages (Balanced Choice for Industrial Sourcing)
2. Versus imported DIN rail power supplies from Schneider / Siemens: Prestazioni equivalenti, certifications and protection levels at only 60%~70% of the import price, significantly lowering overall equipment BOM cost.
3. Versus domestic generic power supplies: Unit price only 10%~20% higher, but service life extended 3~5 times with drastically reduced failure rates, eliminating on-site equipment shutdown rework and after-sales compensation risks.
4. Energy Efficiency Savings: High efficiency reduces cabinet heat load, lowers long-term electricity consumption and meets equipment energy-saving acceptance standards.

VII. Exclusive Additional Advantages of SDR Series (SDR-480-24)

1. Narrow metal housing saves cabinet installation space
2. Built-in active PFC, essential for high-power centralized power supply
3. 150% peak load capacity compatible with servos, robots and automated production lines
4. DC OK alarm contacts facilitate remote equipment monitoring
5. SDR-P variant supports multi-unit N+1 redundant parallel expansion without cabinet redesign for higher power
6. Fanless natural convection design resists malfunctions in dusty workshops and food production lines

Brief Core Selection Logic Summary

For automated equipment and industrial control cabinets requiring stability, low after-sales workload, full compliance and cost efficiency, MEAN WELL is the optimal alternative balancing high-priced imports and low-quality generic brands. In particolare, the high-power SDR DIN rail series is the mainstream standard for factory 24V centralized power supply.

Complete Classification of MEAN WELL Full Product Lines (Sorted by Common Industrial Selection Criteria)

MEAN WELL owns 6 core product categories subdivided into 12 application series, covering power range 0.5W~256000W for industrial automation, illuminazione, medico, energy storage and railway applications. Below sorted by most frequently used engineering sequence, including the SDR DIN rail series you adopt.

1. DIN Rail Mounted Power Supplies (Mainstream for Industrial Control Cabinets, Category of your SDR-480-24)

Mounted on standard TS-35 DIN rail for centralized power supply of PLCs, servos and sensors; categorized into economy, high-end PFC, trifase, ultra-slim and parallel redundant variants

1. SDR Series (Premium Active PFC Flagship Line)

Gamma di potenza: 75W/120W/240W/480W/960W

Modelli rappresentativi: SDR-480-24 (Versione standard), SDR-480P-24 (Parallel N+1 Redundant Version)

Caratteristiche: 94% alta efficienza, DC OK alarm contact, 150% peak load, slim metal housing, natural convection cooling; top choice for factory automation

2. NDR Series (Economy Metal Housing, No Built-in PFC)

75~480W, narrow body, costo inferiore, for single low-power independent loads

3. EDR/HDR Series (Ultra-slim Economy, Custodia in plastica)

HDR-15/30/60/100/150; EDR-75/120/240, ultra-compact footprint for small control cabinets, access control and security monitoring

4. TDR/XTR Series (Three-phase 380V Input High-power DIN Rail)

TDR-480/960, XTR-240/480/960, for three-phase grid, attrezzature pesanti, air compressors and large production lines

5. XDR-E Series (New Generation Wide Voltage 85~305VAC)

75~960W, compatible with North American 277V grid, multi-industry universal certifications

6. DRS Series (DIN Rail Charging Dedicated)

24V/48V 3-stage battery charging for AGVs and energy storage backup power

1. Enclosed AC-DC Power Supplies (Built-in Power Supply for Equipment Enclosures & Complete Machines)

Fully sealed metal housing, power coverage 15W~3000W, categorized into economy non-PFC, premium PFC, medical and three-phase ultra-high power

1) Economy Non-PFC (Best Cost-performance)

LRS Series: 35~1200W, 1U ultra-slim, universal industrial use, most popular enclosed power supply model worldwide

RS/RD/RT/RQ: 15~150W, single/dual/triple/quad multi-output variants for multi-voltage instrumentation

2) Built-in Active PFC (Grid Harmonic Compliant, Standard for High Power)

HRP/HRPG: 75~1000W, 5-anno di garanzia, low standby power for premium equipment

NSP Series (New Generation): 75~3200W, 33% smaller volume, -40~+85℃ wide temperature range, multi-standard certifications for industrial/medical/communication

RSP Series: 750~3000W, low-profile 1U design, supports active multi-unit parallel connection for high-power rack equipment

SP Series: 75~750W, classic legacy PFC model for replacement of existing installed equipment

3) Three-phase Input Ultra-high Power (Heavy-duty Complete Industrial Equipment)

RST Series: 5kW/7.5kW/10kW/15kW, three-phase 380V input for large control cabinets and laser equipment

4) Medical-specific Enclosed Power Supplies

RPS/MSP Series: Comply with 2×MOPP medical isolation, low leakage current for ventilators and diagnostic testing equipment

III. LED Driver Power Supplies (Lighting Exclusive, Constant Current / Constant Voltage, IP67 Waterproof)

For outdoor street lamps, high-bay lights, landscape lighting and building facade lighting; fully potting waterproof design, multi-channel dimming (DALI / 0-10V / 3-in-1)

1. HLG/ELG/XLG: 40~600W, IP67 waterproof, flagship model for outdoor high-power lighting
2. LPF/NPF: 16~200W, economy waterproof type for commercial lighting
3. XLC/XLN: NFC adjustable current, DALI-2 intelligent dimming for smart building lighting
4. LCM: Multi-channel constant current output for light strips and panel lights
5. DC-DC Converters (DC-DC Step-down, On-board Vehicle & Railway Applications)

Convert 24V/48V DC bus to 5/12/24V, categorized into DIN rail, PCB on-board and potting vehicle-mounted types

1. RSD Series (DIN Rail DC-DC): 50~500W, DIN rail installation for secondary power supply inside control cabinets
2. SD Series (PCB On-board DC-DC): 10~300W, PCB mounting
3. RSDH/DDRH: High DC input voltage for photovoltaic and energy storage matching
4. MDS/MDD: Medical isolated miniature DC-DC modules (1~20 W)
5. LDD: DC constant current LED drivers
6. Battery Chargers & DC-AC Inverters (Energy Storage, Battery Inversion, Backup Power)
7. DRS Series (DIN Rail Charging), CH Series (Enclosed Battery Chargers): 3-stage charging for lead-acid / lithium batteries
8. DC-AC Inverters (NTS/NEU Series): 100~3000W, DC to 220V AC for photovoltaic energy storage and vehicle backup power
9. Adapters / Bare-board Supplies / Modulare & Specialized Power Supplies

1) External Adapters (Desktop / Wall Plug-in)

GST/GSM/GE Series, 12~280W, Level VI high efficiency for industrial peripherals, instruments and cameras

2) Bare PCB Power Supplies (Embedded Equipment PCB Mounting)

IRM/EPS Series, 5~150W, housing-free for internal equipment integration

3) 19-inch Rack-mount / Configurable Modular Power Supplies

NMP Series: Modular replaceable output modules for testing equipment and automated test benches

RST High-power Rack Supplies: Centralized cabinet power supply

4) Industry-specific Special Series

1. Medical Power Supplies: RPS, MSP, MDS, ISO13485 certified production, 2MOPP isolation
2. Railway Power Supplies: RSD, TDR, EN50155 rolling stock certification
3. KNX Smart Building Power Supplies: KNX bus dedicated power supply
4. Marine Certified Power Supplies: SDR/HRP with GL marine approval for shipboard equipment

VII. Quick Selection Guide for High-frequency Industrial Series