Product Overview
When system uptime is critical, the Siemens 6ES7407-0KA02-0AA0 PS407 power supply delivers stable 5 V DC output at 10 A for S7-400 backplane bus. This industrial automation module accepts wide-range AC/DC inputs (120/230 V) and provides mains buffering of 20 ms to ride through brief interruptions. With an optional backup battery (3.6 V / 2.2 Ah lithium AA), it ensures data retention during power loss. Part of the Siemens PS407 family, the 6ES7407-0KA02-0AA0 is designed for high reliability in demanding manufacturing environments.
Technical Specifications
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Input voltage: 120/230 V AC/DC (rated)
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Output voltage: 5 V DC and 24 V DC
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Output current (5 V DC backplane bus): 10 A (no base load required)
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Output current (24 V DC backplane bus): 1 A (idling-proof)
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Active power input (typ.): 95 W
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Power loss (typ.): 20 W
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Inrush current (max.): 63 A (full width at half maximum 1 ms)
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Leakage current (max.): 5 mA
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Mains buffering: 20 ms stored energy time
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Optional backup battery: 1x lithium AA, 3.6 V / 2.2 Ah
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Dimensions (W x H x D): 50 mm x 290 mm x 217 mm
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Weight: approx. 1 200 g
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Ambient temperature (operation): 0 °C to 60 °C
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Degree of protection: Equipment protection class I with protective conductor
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Standards: FM approval (Ta: 0 °C to 70 °C T4), BIS, compliance with IEC 61000-3-2 and IEC 61000-3-3
Real-World Applications
The Siemens 6ES7407-0KA02-0AA0 power supply is ideal for continuous process lines, such as chemical plants or automotive assembly, where voltage stability protects downstream S7-400 PLC modules. Its wide input range accommodates global power grids, reducing inventory complexity. The 20 ms buffering ensures ride-through for short dips, preventing costly production stops. In energy-sensitive applications, the optional battery backup maintains configuration data, supporting quick recovery after outages.
Maintenance and Reliability
To maximize ROI, inspect the Siemens 6ES7407-0KA02-0AA0 annually for dust accumulation on the fanless heatsink and verify battery voltage if installed. Operating within 0 °C to 60 °C avoids thermal stress. The short-circuit protection and overvoltage category II isolation extend service life. With a typical power loss of 20 W, this unit contributes minimal heat to the cabinet, reducing cooling requirements. These features lower total cost of ownership compared to less efficient alternatives.
Selection Guide and Purchasing Advice
Before purchasing the Siemens 6ES7407-0KA02-0AA0, confirm your S7-400 rack has two free slots for this power supply module. Verify that your input voltage matches 120-230 V AC or DC. For applications requiring data backup, order the optional lithium AA battery separately (3.6 V / 2.2 Ah). As a trusted supplier, PLC Source PRO (store link: ubest101.myshopify.com) stocks genuine Siemens 6ES7407-0KA02-0AA0 units with fast shipping. Ensure you receive the exact model by checking the part number on the label upon delivery.