PLCs, Power Supplies & Others

Industrial automation requires a stable power source to maintain continuous production processes. The Siemens K3R072528605 power supply module delivers clean and regulated 24V DC power for critical control equipment. This unit provides exceptional voltage stability even under fluctuating grid conditions.

Technical Specifications at a Glance

Advanced Energy Storage and Hold-up Capability

The Siemens K3R072528605 incorporates an 820 µF low-ESR capacitor bank for exceptional energy storage. This design provides a 25 ms hold-up time at full 20A load. This capability allows the power supply to bridge short-term AC interruptions without disrupting connected equipment. The capacitor bank also effectively filters high-frequency noise from the input line.

Robust Protection Features for System Safety

Overvoltage protection activates at 28.5V DC to prevent damage to sensitive downstream components. Current limiting circuitry restricts output current to 22A during overload conditions. Overtemperature protection initiates a thermal shutdown when internal temperatures exceed 80°C. All protection circuits automatically reset after fault conditions clear. These features collectively ensure safe operation in harsh industrial environments.

Efficient Thermal and Mechanical Design

Natural convection cooling eliminates the need for cooling fans, significantly reducing maintenance requirements. An extruded aluminum heatsink effectively dissipates heat across the entire temperature range. The compact 150x120x65 mm housing fits easily into standard control cabinets. At 1.8 kg, the module offers an excellent power-to-weight ratio for its 480W capacity. Five spring-clamp terminals on each side provide tool-free field wiring connections.

Flexible Input and Output Connectivity

Spring-clamp terminals accept solid or stranded wires from 0.2 mm² to 4 mm². Five input terminals accommodate both AC and DC power sources without requiring manual switching. Five output terminals allow multiple load connections to distribute power efficiently. The module accepts 85–264V AC or 120–300V DC input, enabling worldwide deployment across diverse power infrastructures. This universal input capability simplifies inventory management for global manufacturers.

Wide Operating Temperature Range

The Siemens K3R072528605 operates reliably from -25°C to +70°C ambient temperatures. This wide range makes the unit suitable for outdoor installations or unheated factory floors. The module maintains full 20A output up to 60°C with a slight derating above that point.

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