6EP1437-2BA20 SITOP PSU300S 24V/40A 3AC Power Supply | Siemens

The Original New Siemens 6EP1437-2BA20 SITOP PSU300S 24V/40A Power Supply is a high-performance 3-phase stabilized power supply designed for demanding industrial automation and process control applications. It delivers 40A at 24V DC (960W) from a wide-range 400-500V 3AC input, making it suitable for complex plants and machinery where power reliability and efficiency are critical. Featuring a 150% Power Boost for loads with high inrush current, 120% permanent overload capability, and 91.5% efficiency, this power supply provides reliable system start-up and energy-saving operation in a compact design.

Core Engineering Highlights:
3-phase 400-500V AC wide-range input (340-550V AC) | 24V DC / 40A output (960W) | 91.5% efficiency | 150% Power Boost (approx. 3x rated current for short periods) | 120% permanent overload capability | Adjustable output voltage 24-28V | 6ms buffering time | 24-28V adjustable output | IP20 protection | 150 x 150 x 145 mm | 3.7kg weight | Screw-type connection | DIN rail mountable

Key Features:

• Original New Siemens 6EP1437-2BA20 power supply

• 3-phase AC wide-range input: 400-500V (operating range 340-550V) for global compatibility

• 40A continuous output current at 24V DC, providing 960W of reliable power

• Adjustable output voltage from 24V to 28V (max. 960W) for system optimization

• Power Boost function delivers up to 150% (approx. 3x rated current) for short periods to start loads with high inrush current

• Permanent overload capability of 120% offers power reserves for system expansions

• 91.5% high efficiency reduces energy consumption and heat buildup in the control cabinet

• Output voltage adjustable via potentiometer (24-28V)

• Green LED status indicator for "24V OK" and relay contact signaling (NO contact, 60V DC/0.3A) for remote monitoring

• Selectable overload response: constant current with automatic restart or latching shutdown

• Screw-type connection terminals for secure wiring

• Compact metal housing: 150 x 150 x 145 mm (W x H x D)

• IP20 protection rating for cabinet installation

• DIN rail mounting for easy installation

• CE, cULus certified, RoHS compliant

• 6ms mains buffering at Vin = 400V

• Soft start — no overshoot of output voltage

Applications:

• Complex industrial plants and machinery

• Automation systems and control panels

• Process control and manufacturing equipment

• High-power 24V DC distribution systems

• Systems requiring high inrush current capability

• OEM equipment and machine building

• Replacement or upgrade of existing SITOP power supplies

• Applications requiring ATEX certification (hazardous area approval originally available; consult manufacturer for current status)

Technical Specifications:

System Compatibility:

• Siemens SITOP PSU300S series

• SIMATIC S7-1200, S7-1500, S7-300, S7-400 controllers

• ET 200SP, ET 200MP distributed I/O systems

• All 24V DC industrial automation devices

• DIN rail mounting systems

• Can be combined with buffer, DC-UPS, redundancy and selectivity modules

Typical System Architecture:
3AC 400-500V Mains Supply
↓
6EP1437-2BA20 SITOP PSU300S Power Supply (150mm width)
│
├── 24V DC / 40A Output → Control Cabinet Power Distribution
├── Power Boost (150% / 65A) → High Inrush Current Loads
├── Adjustable Voltage (24-28V) → System Optimization
├── Green LED + Relay Contact → Status Monitoring (24V OK)
│
↓
PLC Systems (S7-1200 / S7-1500 / ET 200SP)
↓
I/O Modules, Sensors, Actuators, HMI Panels

Related Products:

• 6EP1436-2BA10 – SITOP PSU300S 24V/20A version (lower current)

• 6EP1434-2BA20 – SITOP PSU300S 24V/10A version

• 6EP1433-2BA20 – SITOP PSU300S 24V/5A version

• SITOP SEL1400 – Redundancy module for parallel operation

• SITOP CNX8600 – Buffering module for short-term power failures

• SITOP PSE200U – Selective monitoring module for load protection

• 3RV2011-1DA10 – Circuit breaker (recommended protection for 40A unit)

• 3BT1900-1SB20 – Device labeling plates for SITOP PSU300S

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Siemens and SITOP are trademarks of Siemens AG.