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| Place of Origin: | Austria |
| Brand Name: | Siemens |
| Certification: | COC & COO |
| Model Number: | 6ES5955-3LF12 |
Siemens 6ES5955-3LF12 SIMATIC S5 Series 955 Power Supply Unit with 115/230VAC 5VDC 40A
The Siemens 6ES5955-3LF12 is a high-capacity power supply module from the legacy SIMATIC S5 programmable logic controller (PLC) family, engineered to deliver stable 24 V DC power at up to 20 A continuous current for central processing units (CPUs), I/O modules, communication processors, and other components in S5 automation systems. Designed for industrial environments with demanding electrical loads, this robust unit ensures reliable operation in manufacturing, process control, utilities, and infrastructure applications where S5 systems remain in service.
Although the SIMATIC S5 platform has been succeeded by the modern S7 series, thousands of installations worldwide—particularly in power plants, steel mills, water treatment facilities, and legacy production lines—still depend on S5 hardware. The 6ES5955-3LF12 plays a critical role in maintaining these brownfield systems, offering proven durability, built-in protection mechanisms, and compatibility with S5 U-type racks such as the 6ES5441 or 6ES5451 series.
Product Overview: Siemens 6ES5955-3LF12
| Manufacturer | Siemens |
| Product Family | SIMATIC S5 PLC System – PS 955 Power Supply Series |
| Model Number | 6ES5955-3LF12 |
| Output Voltage | 24 V DC (stabilized, low ripple) |
| Rated Continuous Output Current | 20 A |
| Peak Current Capability | Up to 24 A for short durations (e.g., during system startup or transient loads) |
| Total Power Output | Approx. 480 W |
Product images
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