Siemens 6ES5955-3LF11

Description

Siemens 6ES5955-3LF11 – SIMATIC S5 Rack-Mount Power Supply

The Siemens 6ES5955-3LF11 is a high-current rack-mount power supply used in SIMATIC S5 automation systems, specifically within 135U and 150U control racks. Furthermore, it delivers a stable 115/240 VAC to 40A regulated output, thereby supporting reliable operation of PLC modules and associated process control equipment.

However, as this model has now been discontinued by Siemens, sourcing new replacement units can be difficult and, consequently, costly. Therefore, many users operating legacy automation platforms rely on continued use of installed hardware to avoid expensive upgrades, rewiring, or software redevelopment.

For that reason, Neutronic Technologies prioritises professional repair and refurbishment services for Siemens SIMATIC S5 power supplies, thus helping businesses extend the operational life of legacy systems and minimise downtime.

Moreover, all refurbished units and completed repairs are fully tested and supplied with a 12-Month Warranty for confidence and long-term reliability.

Consequently, if your Siemens 6ES5955-3LF11 has failed – contact us for a fast repair quote or  Book Collection for Repair.

Common Faults We Repair

We repair the most common failures, including, but not limited to:

• No output / intermittent output

• Overheating or early shutdown

• Damaged capacitors or internal components

• Overvoltage / undervoltage issues

• Rack connection damage

• Electrical noise or instability

• Power-up failure or alarm conditions

In addition, every repair includes:

• ✔ Component-level diagnostics and repair

• ✔ Industrial cleaning and refurbishment

• ✔ Load and performance test

• ✔ Final function certification

• ✔ 12-Month repair warranty