The Siemens 6EP1336-1LB00 is a 480 W SITOP PSU100L economy power supply delivering 24 V DC at 20 A from a wide-range 100–240 V AC input. It serves as the DC bus backbone for medium-to-large control panels powering multiple PLC racks, I/O modules, and 24 V actuators from a single unit.

Performance and Lifecycle Status

• 92% efficiency at 480 W output with 45 W power loss — manageable with natural convection
• Constant-current overload behavior at ~24 A provides predictable short-circuit response
• Wide operating temperature range of -25 to +70 °C with derating above 45 °C
• Product discontinuation announced: October 1, 2025. Siemens recommends migrating to the PSU4200 6EP3336-3SB00-0AX0

Technical Specifications

Migration Path

The successor PSU4200 6EP3336-3SB00-0AX0 offers 93% efficiency, push-in terminals, and a narrower 70 mm width while retaining the same 24 V / 20 A / 480 W output. For new designs, consider migrating directly to the PSU4200 or the diagnostic-equipped PSU6200 6EP3336-7SB00-3AX0 (95.5% efficiency, 150% extra power).