Modern telecom base stations run on -48V DC — the industry standard for good reason: it works with lead-acid and lithium battery backup, minimizes corrosion, and fits SELV safety requirements. But as base station power cabinets fill up with more active equipment, engineers keep running into the same problem: how to power the growing number of 24V auxiliary loads inside the same -48V cabinet.

Fans, backup controllers, monitoring units, and small radio modules often need 24V. Tapping directly from the -48V bus without proper regulation produces unstable, noisy power that causes equipment to reset unpredictably. The straightforward fix is a well-regulated isolated DC-DC converter.

Telecom cabinets are electrically noisy environments — rectifiers switching at high frequency, load transients from radio bursts, and battery discharge currents all create interference. An isolated converter places a clean 1500VDC barrier between the messy bus and sensitive monitoring and control circuits. Without it, equipment glitches and false alarms multiply.

The MDA100-110S24 covers the full telecom -48V operating range (typically -40V to -57V) with its 66–154V input window, so voltage sags during battery discharge won't cause shutdowns.

Five protection functions handle cabinet fault scenarios without damage. The module's 100–200 KHz switching frequency stays well below the radio frequency bands used in cellular equipment, minimizing EMI risk.