1. Comparison of Core Technical Parameters

　　300W switching power supplies for servers and base stations focus on uninterrupted operation, energy efficiency, and environmental adaptability, with key parameters aligned to industry standards (information integrated from server power technical specifications and base station power design norms):

　　Delta DPS-300AB-12A (Server-focused): Features an input range of 85-264VAC (compatible with global power grids), fixed 12V DC output with rated current 25A. Complies with 80 PLUS White certification, achieving efficiency ≥85% at 50% load. Core reliability indicators include MTBF of 1,000,000 hours and N+1 redundant current sharing support. Equipped with temperature-controlled fan cooling (noise ≤35dB), ripple and noise ≤50mVp-p, and protection functions for short-circuit (auto-recovery), overload (120% rated current), and overtemperature (90℃ shutdown). Operating temperature range: 0~+60℃, with dimensions 150×80×40mm (fit for 1U rack installation).

　　Huawei R4830G6-300 (Base Station-focused): Accepts 85-264VAC/180-300VDC dual input, offering 48V/6.25A output (matched to base station power distribution systems). Efficiency reaches 92% (exceeding 80 PLUS Gold standards) with built-in SiC Schottky diodes for loss reduction. Protective performance includes 6kV surge protection (meets ITU-T K.20 standard), IP65 enclosure (dust/waterproof), and -40~+70℃ wide-temperature operation. Adopts natural convection cooling (fanless), ripple and noise ≤100mVp-p, and supports PMBus remote monitoring. MTBF is certified at 800,000 hours.

　　Emerson NetSure 300W-48V: Compatible with 90-264VAC input, 48V/6.25A output, efficiency 88%~90%. Integrates hot-swap function (supports online replacement without shutdown) and dual-loop current sharing. Protection covers short-circuit, overvoltage, overcurrent, and reverse polarity. Uses aluminum alloy housing with electromagnetic shielding, operating temperature -25~+65℃, and complies with ETSI EN 300 386 for base station equipment.

　　2. Key Selection Criteria for Server & Base Station Adaptation

　　2.1 Scenario-Driven Parameter Matching

　　Server Application: Prioritize 12V output (matches CPU/memory power requirements), CRPS/OCP interface compatibility (for rack-mounted servers), and 80 PLUS Silver/Gold certification (reduces data center PUE). Redundant design (N+1) is mandatory for mission-critical servers (e.g., database servers).

　　Base Station Application: 48V output is standard (aligns with telecom power distribution), requires IP65+ protection (outdoor deployment) and -40~+70℃ wide-temperature resistance (adapts to extreme climates). Surge protection ≥6kV is essential for lightning-prone areas.

　　2.2 Reliability & Redundancy Design

　　Redundancy: Parallel connection of 2-3 units (e.g., 2×300W for 450W load) with current sharing accuracy ≤5% (prevents single-point failure).

　　Component Reliability: Use industrial-grade capacitors (10,000-hour lifespan at 105℃) and military-grade MOSFETs (e.g., Infineon BSC016N06NS) for stable operation.

　　MTBF Requirement: ≥500,000 hours for servers; ≥800,000 hours for remote base stations (reduces maintenance frequency).

　　2.3 Energy Efficiency & Cooling Adaptation

　　Efficiency Standard: Servers require 80 PLUS White or higher (preferably Silver/Gold for large-scale data centers); base stations prioritize ≥90% efficiency to reduce off-grid generator fuel consumption.

　　Cooling Strategy: Server rooms use temperature-controlled fans (adjust speed based on 40~85℃ temperature sensor data); outdoor base stations adopt fanless natural convection (avoids dust accumulation in fans).

　　2.4 Mandatory Certifications

　　Servers: UL 60950-1 (North America), EN 60950-1 (Europe), GB 4943.1 (China).

　　Base Stations: YD/T 1058 (China Telecom), ETSI EN 300 132-2 (Europe), FCC Part 15B (EMC compliance).

　　3. Mainstream Products and Application Scenarios

　　Delta DPS-300AB-12A: Key advantages include 80 PLUS White efficiency, 1U compact design, and CRPS interface. Suitable for 1U rack-mounted servers, blade server auxiliary power, and small data center edge nodes. Reference price: $220-$280, with 3-year warranty.

　　Huawei R4830G6-300: Highlights include 92% high efficiency, IP65 protection, and -40℃ cold start capability. Adaptable for outdoor macro base stations, remote rural communication towers, and off-grid base stations (paired with solar 储能). Price: $350-$420, 5-year warranty.

　　Emerson NetSure 300W-48V: Advantages include hot-swap function and ETSI compliance. Suitable for indoor distributed base stations, small-cell base stations in urban areas, and server backup power systems. Price: $280-$330, MTBF 800,000 hours.

　　4. Key Design and Application Considerations

　　4.1 Redundancy Configuration & Load Balancing

　　For mission-critical servers (e.g., financial transaction systems), adopt 2+1 redundant configuration (3×300W power supplies for 400W load). Use precision current-sharing resistors (0.01Ω/10W) and TI UCC28019A controllers to ensure load deviation ≤3%. Base stations can use passive redundancy (diodes OR-ing) to simplify design while ensuring 5ms switchover time.

　　4.2 Efficiency Optimization & Component Selection

　　Use PFC+phase-shifted full-bridge topology (reduces switching losses) and SiC diodes (e.g., Cree C3D04060A) to increase efficiency by 3-5% compared to silicon diodes.

　　Input filtering uses Rubycon 470μF/450V capacitors (low ESR) to suppress harmonic current (meets IEC 61000-3-2 Class A).

　　4.3 Base Station Special Design Requirements

　　Lightning Protection: Add 6kV gas discharge tubes (GDT) at the input and TVS diodes (SMBJ6.5CA) at the output to suppress surge voltage.

　　Heat Dissipation: Fanless models use aluminum alloy heat sinks with thermal conductivity ≥200W/(m·K), and ensure 10mm spacing between power supplies for airflow.

　　Waterproofing: Cable entries use IP68 glands, and PCB is coated with 0.1mm polyurethane conformal coating (resists moisture and salt spray).

　　4.4 Monitoring & Maintenance Strategy

　　Servers: Integrate PMBus interface to monitor voltage, current, and temperature in real-time (supports alert notification via SNMP).

　　Base Stations: Add RS485 communication for remote status checking (battery voltage, load rate). Fan-cooled models require quarterly dust filter cleaning; fanless models need annual insulation resistance testing (≥100MΩ at 500VDC).

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