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6ES5955-3LF12 Siemens
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
Siemens part number 6ES5955-3LF12 is an AC-powered supply unit designed for SIMATIC S5-135U and S5-155U automation systems. It provides dual-output (5 V and 15 V) DC power, includes fan cooling with integrated monitoring, and supports battery backup. It serves as the primary power source for legacy S5 controllers in industrial control cabinets, commonly used in machine control, process automation, and retrofit scenarios.
Best Suited For
- Retrofit of SIMATIC S5-135 U / S5-155 U systems
- Environments requiring AC input range with fan-cooled power unit
- Applications needing dual 5 V and 15 V DC outputs
- Locations with need for fan-monitoring and battery backup support
Technical Specifications
I/O & Electrical
Communication & Power
Physical & Environmental
Certifications
UL and CSA listed for North American compliance.