Product Overview
The Siemens 6EP1333-2BA20 is a SITOP PSU100S stabilized power supply designed for industrial automation. This module converts single-phase AC input (120/230 V automatic range selection) to a regulated 24 V DC output at 5 A. With an efficiency of 88% and a typical power loss of only 16 W, it offers excellent energy savings and long-term cost benefits. The unit includes overvoltage protection, short-circuit proof output with constant current characteristic, and a green LED for status indication. Its compact design (50 x 125 x 120 mm) snaps onto standard DIN rails, making installation straightforward.
Technical Specifications
| Parameter |
Value |
| Input Voltage |
85–132 V AC / 170–264 V AC (automatic range) |
| Output Voltage |
24 V DC (adjustable 22.8–28 V via potentiometer) |
| Rated Output Current |
5 A (0–6 A up to +45°C, derating above +60°C) |
| Efficiency |
88% |
| Power Loss (typical) |
16 W |
| MTBF at 40°C |
1,998,441 hours |
| Residual Ripple (max) |
150 mV |
| Short-term Overload Current |
18 A (typical) for 800 ms |
| Protection Class |
IP20, Class I |
| Certifications |
CE, cULus, UKCA, EAC, CB, BIS, shipbuilding approval (BV, DNV) |
The Siemens 6EP1333-2BA20 also features a relay contact (NO, 60 V DC/0.3 A) for voltage OK signaling, and buffering time of at least 20 ms during power failure. Galvanic isolation between input and output ensures safety extra-low voltage per EN 60950-1 and EN 50178.
Industry Applications
This power supply is ideal for control cabinets, PLC systems, and industrial sensors requiring a stable 24 V DC source. For example, in a manufacturing line with frequent voltage fluctuations, the Siemens 6EP1333-2BA20 maintains output regulation within 3% overall tolerance, preventing downtime. Its ability to deliver 144 W of active power supports multiple loads, and the adjustable output allows fine-tuning for critical equipment. The long MTBF (over 1.9 million hours) reduces replacement costs, aligning with cost-benefit goals.
Installation and Mounting
The Siemens 6EP1333-2BA20 snaps onto a DIN rail (EN 60715 35x7.5/15). Required clearances: 50 mm top and bottom, 0 mm left and right. Use screw terminals for input (L, N, PE: 0.5–2.5 mm²), output (+, –: two terminals each), and signaling (two terminals). Ensure natural convection cooling; ambient temperature range -25 to +70°C. No wall or S7 rail mounting is supported.
Maintenance and Reliability
With an MTBF of 1,998,441 hours at 40°C, the Siemens 6EP1333-2BA20 requires minimal maintenance. The unit is short-circuit proof and includes overvoltage protection (Vout < 33 V). Regularly inspect the green LED and relay contact for correct operation. Keep ventilation slots clear; derating applies above +60°C (1.6%/K). The enclosure meets IP20, so protect from dust and moisture.
Selection Guide
Before purchasing, verify input voltage compatibility (120/230 V AC, 50/60 Hz) and ensure the output current meets your load (5 A continuous, up to 6 A below +45°C). For higher power, up to two units can be paralleled. Recommended upstream protection: miniature circuit breaker, 6 A characteristic C. For accessories, consider buffer modules and the device identification label (3RT1900-1SB20). PLC Source PRO (ubest101.myshopify.com) stocks this genuine Siemens 6EP1333-2BA20 with full warranty support.