When the Elex Top launched, its main rivals included:
The Elex Top stood out for its compact modular design (Eurocard-style racks) and lower power consumption compared to many U.S. and Japanese designs of the era.
Consumer PC power supplies or generic LED drivers often fail within a few years when run near their limits. The Ericsson Elex Top was designed for telephone exchanges and base stations—systems that require 24/7/365 operation for a decade. These units use Japanese-grade capacitors, thick PCB traces, and thermal management that puts modern budget units to shame.
Railway signaling, oil/gas SCADA, and traffic light controllers also utilize these batteries due to their wide operating temperature range (-20°C to 50°C). ericsson elex top
Class D and Class AB amplifiers love stiff power. The instant transient response of the Elex Top (due to large output capacitors) provides dynamic headroom without voltage sag.
Because Ericsson stopped manufacturing these specific units around 2018 (post-Flex acquisition), retail channels are dead. Your hunting grounds are:
Pro Tip: When searching, also look for the original part numbers. Common ones include: PSE 300-12, PMF 2412-T, Elex Top 24/600, or ROA 128 887/1. When the Elex Top launched, its main rivals included:
Tagline: Self-optimizing spectral efficiency through real-time topology learning.
You might ask: Why should I care about a power supply that is technically end-of-life?
The answer lies in three words: Reliability, Noise, and Price. The Elex Top stood out for its compact
The Ericsson Elex Top is now a museum piece. Enthusiasts and telecom collectors occasionally restore non-working units for demonstration. Its key legacy is historical: it helped normalize the idea that software, not hardware, should control a telephone call.
If you find a discarded Elex Top cabinet in an old central office, look for its distinctive light grey-green painted frames, banks of silver reed relay capsules, and a large wire-wrapped backplane. A few are still in service as private automatic branch exchanges (PABX) in industrial sites, but the public PSTN has long since left them behind.