The Siemens 6EP1334-1LD00 is a SITOP power supply unit delivering a rated output current of 12.5 A. It's built for industrial control panels where you need a stable DC bus from a single-phase AC line — think PLC racks, DC motor brakes, or sensor power rails. It provides safety extra-low voltage (SELV) output per EN 60950-1, so the DC side is touch-safe and can feed circuits that need galvanic separation from the mains. Efficiency sits at 86% at rated load, which keeps heat dissipation manageable in a sealed enclosure — you won't need to oversize the cabinet ventilation just for this unit.
The 12.5 A rating is continuous at 25 °C ambient, but the unit derates 2.5% per Kelvin above 50 °C up to 70 °C. That means at 60 °C you're looking at about 9.4 A available — plan your load budget around the derated figure if the panel runs hot. Input accepts 85–264 V AC at 47–63 Hz, covering 100–240 V nominal ranges worldwide. The wide input tolerance means it handles brownouts down to 85 V without dropping the output. It's rated IP20, so it belongs inside a panel — not on a washdown line or outdoors. Mount it on a wall or DIN rail (fastening method is wall mounting; adapters for DIN rail are common in the family). Operating temperature range is -10 to +70 °C with forced convection (a fan). Without active airflow, the upper limit drops — so if your panel relies on natural convection, you'll need to derate further or add a fan.
UL and CSA approvals are in place (cULus-Listed to UL 508 and CSA C22.2 No. 107.1, plus cURus to UL 60950-1 and CSA C22.2 No. 60950-1), so it's accepted for North American panels without a special inspection sticker. CE and EAC markings cover European and Eurasian Economic Union markets. No ATEX or IECEx certification — not rated for explosive atmospheres.
What to watch when wiring
Input terminals (L, N, PE) accept 0.5 to 1.3 mm² single-core or finely stranded wire — one screw terminal per connection. Output terminals (+, -) give you two screw terminals each for the same wire range, handy for daisy-chaining loads without a separate distribution block. Siemens recommends a 10 A characteristic C or 16 A characteristic B miniature circuit breaker in the feeder. Internal fuse protection is built in, but the upstream breaker is still needed for the wiring. The unit supports bridging of equipment (paralleling outputs) if you need more current — but watch the derating and total system limits.