Parameters (Specifications) Brand: Emerson (Network Power / Vertiv) Model Number: HD4830-3 Product Series: HD Series High-Frequency Switch-Mode Rectifier Product Type: AC-DC Rectifier / Power Module Primary Function: Converts AC power to regulated -48V DC for telecommunications and industrial applications Mounting: Designed for installation in standard power shelves (19-inch or 23-inch racks) Hot-Swappable: Yes - can be inserted or removed without powering down the system Parallel Operation: Supports multiple modules in parallel for N+1 redundancy Input Specifications: Input Voltage: 200-240 VAC single-phase (nominal) Wide range: 176-275 VAC (operating) Input Frequency: 45-65 Hz Input Current: < 10 A at full load Power Factor: >0.99 (with active PFC) Efficiency: >90% (typical at full load) Inrush Current: Soft-start controlled, < 150% of rated current Output Specifications: Output Voltage: -48 VDC nominal (adjustable range typically -42 to -58 VDC) Output Current: 30 A (at nominal input voltage) Output Power: 1500 W typical (30A × 50V = 1500W) Output Regulation: ±1% (over entire input range and 0-100% load) Ripple & Noise: < 100 mV p-p (typical) Hold-up Time: >10 ms at full load Protection Features: Overvoltage Protection: Automatic shutdown with manual restart Overcurrent Protection: Constant current limiting with automatic recovery Overtemperature Protection: Thermal shutdown with automatic restart Short Circuit Protection: Continuous current limiting, no damage Reverse Polarity Protection: Diode protected Input Undervoltage/Overvoltage Protection: Automatic shutdown and recovery Monitoring and Control: Communication: CAN bus (for communication with system controller) RS-485 optional Indicators: Green LED: Power OK Yellow LED: Protection/Fault Red LED: Failure Alarms: Summary alarm via communication bus Remote Monitoring: Via system controller (load sharing, status, parameters) Environmental: Operating Temperature: -10°C to 55°C (14°F to 131°F), derated above 45°C Storage Temperature: -40°C to 85°C (-40°F to 185°F) Humidity: 5-95% non-condensing Altitude: Up to 3000m (derated above 1500m) Cooling: Forced air (internal fans, front-to-back airflow) Acoustic Noise: < 55 dBA at 1 meter Mechanical: Dimensions (H x W x D): Standard rectifier module size (typically 1U or 2U height) Approx. 88mm (H) x 482mm (W) x 300mm (D) Weight: Approximately 5-8 kg (11-18 lbs) Material: Steel chassis with aluminum front panel Finish: Textured powder coat Certifications: Safety: UL, cUL, CE, TUV, IEC 60950 EMC: EN55022 Class A, EN61000 Telecom: NEBS Level 3 compliant (on some variants) RoHS: Compliant