VSBU-120C-24

The VSBU-120C-24 is a compact AC/DC converter manufactured by CUI Inc., designed for reliable off-board power delivery. It accepts a universal input voltage range of 90 to 264 Vac across 47 to 63 Hz frequencies, making it suitable for global deployment without regional modifications. The unit delivers a nominal 24 Vdc output capable of supplying up to 5 A, resulting in a maximum output power of 120 W.

Electrical performance is optimized for stability and efficiency. The converter features a typical power factor correction of 0.95 at 240 Vac full load. Line regulation is maintained within 1% under full load conditions, while load regulation stays within 5% across a 10 to 90% load range at 230 Vac. The temperature coefficient ranges from -0.04 to 0.04 %/°C, ensuring consistent output voltage across varying thermal environments.

Protection and transient handling are built into the design. An over-voltage protection circuit safeguards connected loads against output spikes. The hold-up time guarantees a minimum of 16 ms at full load and 100 Vac input, allowing brief power interruptions without system reset. Start-up time is capped at 3 seconds under full load conditions, and transient response settles within 4 ms when transitioning between full and half load at 110 Vac.

This power supply is engineered for integration into industrial control systems, telecommunications equipment, and automated machinery where dependable off-board DC power is required. Its wide input tolerance and robust regulation characteristics support operation in electrically noisy or variable grid environments.