The SITOP PSU100S 6EP1333-2BA20 is a single-phase 24VDC power supply that punches above its 120W nominal rating — typical active power reaches 144W, and the Extra Power feature temporarily delivers 150% of rated current (7.5A) for 5 seconds each minute. This overload headroom is sized specifically to let downstream circuit breakers clear a branch fault without the entire DC bus sagging, a practical advantage when the same supply feeds multiple selectively protected branches.

Compact and Connected

At 50mm wide, the module fits into tight control boxes and distributed I/O panels where DIN rail real estate is at a premium. The wide-range input (85-264VAC, 47-63Hz) auto-senses line voltage — no manual selector switch to mis-set during commissioning. Push-in spring terminals on both input and output accept 0.5-4mm² wire without tools. A green "24V OK" LED and a changeover relay contact provide local and remote output status monitoring.

Protection and Reliability

The output is galvanically isolated (SELV per EN 60950-1), short-circuit proof with constant-current limiting at approximately 7.1A, and protected against overvoltage (output clamped below 33V in the event of an internal fault). Mains buffering of at least 20ms at nominal input rides through typical grid disturbances. The metal housing and -10°C to +70°C operating range with natural convection cooling suit the varied thermal conditions of industrial control cabinets.

Key Decision Parameters

For 12VDC applications in the same PSU100S series, see the 6EP1323-2BA00 (14A/168W). For the modular PSU200M with dual-phase input capability, see the 6EP1333-3BA10.