Vivotek HLG-120H-24 120W DC24V Switching Power Supply

Vivotek HLG-120H-24 120W DC24V Switching Power Supply

The Vivotek HLG-120H-24 is a compact, high-efficiency single-output switching power supply engineered for demanding professional security and industrial applications. Delivering a reliable 120W at 24VDC with exceptional stability and protection, this unit is built to power multiple high-performance IP cameras, network switches, and surveillance infrastructure with confidence.

Key Features

• 120W constant power output at 24VDC with 5A rated current
• Wide universal input range: 90–305VAC / 127–431VDC
• Exceptional efficiency: 93% typical, reducing operating costs and thermal load
• Precision voltage tolerance: ±1.0% with load and line regulation at ±0.5%
• Compact form factor: 220×68×38.8mm, ideal for compact installations
• Adjustable output voltage (22–27V) and current (2.5–5A) for flexible configuration
• Advanced protection: Short-circuit, overcurrent (95–108%), overvoltage (28–34V), and over-temperature safeguards
• Ultra-low ripple and noise: 150mVp-p maximum for clean, stable power delivery
• Excellent power factor: >0.98 at 115VAC, >0.95 at 230VAC
• 12ms hold-up time ensures system continuity during brief power interruptions

Technical Highlights

This power supply meets stringent international safety and EMC standards including UL8750, CSA C22.2, TUV EN61347-1, and EN61347-2-13. Isolation resistance exceeds 100MΩ across all input-output configurations, and withstand voltage ratings (3.75KVAC I/P-O/P) provide robust electrical separation for mission-critical systems.

The unit operates reliably across extended temperature ranges (-40 to +70°C working, -40 to +80°C storage) with temperature coefficient stability of ±0.03%/℃. EMC compliance includes EN55015, EN55022 Class B emissions and full EN61000-4 immunity testing at light industry surge levels (4KV).

With a proven MTBF of 192.2K hours (MIL-HDBK-217F at 25°C) and automatic fault recovery across all protection modes, the HLG-120H-24 delivers dependable, long-term operation in demanding environments.

Professional Applications

• IP Surveillance: Powers multiple Vivotek and third-party 24VDC IP cameras in networked security systems
• Network Infrastructure: Supports 24VDC-powered switches, PoE injectors, and access control equipment
• Industrial Automation: Reliable power for industrial sensors, controllers, and communication devices
• Building Systems: Suitable for HVAC controls, lighting systems, and other building management applications
• Global Deployment: Universal input voltage accommodates worldwide electrical standards without modification

Marty Allison

The HLG-120H-24 represents an ideal balance of power density, efficiency, and protection for professional installations. Its 93% efficiency significantly reduces cooling requirements compared to older supply designs, making it suitable for space-constrained or thermally sensitive environments. The ±0.5% load and line regulation ensures cameras and critical equipment maintain stable operating voltage even as system loads fluctuate—critical for consistent video quality and uptime.

Adjustable output voltage and current parameters provide system integrators with flexibility to optimize performance for specific equipment requirements, while comprehensive protection modes—particularly constant-current limiting on short circuits and overcurrent—eliminate the need for external circuit protection in most applications. The 12ms hold-up time is sufficient to ride through typical AC utility sags without system dropout, enhancing overall reliability.

For multi-unit deployments, the power supply's low inrush current (60A at 230VAC) means five units can safely operate on a standard 16A Type B circuit breaker, reducing panel complexity and installation cost in large installations.