Vivotek NDR-75-48 48VDC 75W Power Supply

Vivotek NDR-75-48 48VDC 75W Power Supply

The Vivotek NDR-75-48 is a robust industrial-grade power supply designed to deliver stable 48VDC output for IP surveillance cameras, network devices, and other security infrastructure. Built for reliability in demanding environments, this unit converts a wide range of AC input voltages (90–264VAC) into clean, regulated 48VDC power, making it ideal for both standard installations and challenging global deployments.

Key Features

• 48VDC output at 75W rated power capacity (1.6A maximum current)
• Wide AC input range: 90–264VAC, 47–63Hz for worldwide compatibility
• Extended operating temperature range: -20°C to +70°C
• High efficiency: 89% typical, reducing operational costs
• Multiple protection mechanisms: overvoltage, overcurrent limiting, and over-temperature shutdown
• Industrial-grade construction with UL508 and TUV EN60950-1 safety certifications
• Excellent isolation: 3KVAC input-to-output withstand voltage
• Low leakage current: <1mA at 240VAC

Technical Specifications

• Output Regulation: ±1.0% load regulation, ±0.5% line regulation ensures stable voltage delivery
• Voltage Tolerance: ±1.0% with adjustable range of 48–55VDC
• Ripple & Noise: 150mVp-p maximum, suitable for noise-sensitive applications
• Setup & Rise Times: 1200ms setup and 60ms rise time at 230VAC; 2000ms setup and 60ms rise time at 115VAC
• Hold-up Time: 60ms at 230VAC and 12ms at 115VAC maintains operation during brief AC interruptions
• Inrush Current: 20A/115VAC, 35A/230VAC—managed to minimize electrical stress on circuits
• Reliability: 486.2K hours MTBF (MIL-HDBK-217F at 25°C)
• EMC Compliance: Meets EN55022 (CISPR22), EN61204-3 Class B, and heavy industry EMC immunity standards

Protection & Safety

The NDR-75-48 incorporates comprehensive safeguards: constant current limiting for overcurrent/overload conditions (105–130% rated power), automatic recovery after fault removal, overvoltage shutdown (56–65V threshold) with manual recovery, and thermal protection with output shutdown. All protections comply with industrial safety standards, ensuring connected devices remain protected in unstable power conditions.

Applications

Ideal for powering Vivotek IP cameras, network switches, and surveillance infrastructure in outdoor, industrial, or temperature-extreme environments. Suitable for PoE injectors, wireless access points, and other critical network security components requiring stable 48V delivery.

Jerry Tildsen

The NDR-75-48 stands out for its balanced combination of wide input tolerance and precise output regulation—essential for surveillance installations spanning multiple regions or sites with inconsistent power quality. The 89% efficiency rating translates to lower heat dissipation and reduced long-term cooling costs in enclosed cabinets. Its 486K-hour MTBF demonstrates reliability for mission-critical deployments.

The 60ms hold-up time at 230VAC provides sufficient buffer against brief AC drops, protecting against camera reboots during power transients. Compliance with heavy-industry EMC immunity standards (EN61000-6-2) ensures operation in electrically noisy environments such as factories or utility installations. The wide voltage adjustment range (48–55VDC) accommodates device-specific requirements without requiring separate regulators.