Skip to main content
Log in
Siemens 6ES7405-0DA02-0AA — Power Supplies

Siemens 6ES7405-0DA02-0AA PS 405 Power Supply, 24V 2A

MPN6ES7405-0DA02-0AA

Siemens SIMATIC S7-400 PS 405 power supply, 6ES7405-0DA02-0AA, 24 V DC rated input 2 A, 48 W typical active power, 16 W typical loss, 1 slot wide, FM approved Ta 0 °C to 60 °C T4.

$564.00Ref. price · indicative, final on quote
Siemens 6ES7405-0DA02-0AA datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7405-0DA02-0AA — Specifications
ParameterValue
FM approvalYes; Ta: 0 °C to 60 °C T4
Product typeSIMATIC S7-400, Power supply PS 405
Required slots1
Power loss, typ.16 W
Inrush current, max.18 A; Full width at half maximum 20 ms
Active power input, typ.48 W
Backup battery (optional)Yes; 1x lithium AA; 3.6 V / 2.3 Ah
Equipment protection classI, with protective conductor
Product dimensions (W x l x h)2.5cm x 21.7cm x 29cm
Design of electrical connection3x 1.5 mm², solid or stranded wire with end sleeve, external diameter 3 mm to 9 mm
Ambient temperature during operationmin. 0 °C, max. 60 °C
Input current rated value at 24 v DC2 A

Product details

Power supply for the S7-400 rack

The Siemens 6ES7405-0DA02-0AA is a SIMATIC S7-400 PS 405 power supply that occupies one slot in the rack and provides the 24 V DC backplane bus for the CPU and I/O modules.

Inrush and connection

Maximum inrush current is 18 A with a half-width pulse of 20 ms — the upstream 24 V DC breaker or fuse needs to ride through that without nuisance tripping.

Environmental limits and approvals

Operates from 0 °C to 60 °C ambient, and carries FM approval for use in hazardous locations — Ta: 0 °C to 60 °C T4, meaning the surface temperature stays below 135 °C in normal operation. Equipment protection class I with protective conductor — the chassis must be bonded to the panel ground.

Backup and panel fit

An optional backup battery (1x lithium AA, 3.6 V / 2.3 Ah) keeps the RAM and real-time clock alive during a power loss — the battery holder is on the front of the supply.

Frequently asked questions

What is the FM approval rating for the 6ES7405-0DA02-0AA?

FM approval is Yes, with a temperature class of T4 at 0 °C to 60 °C ambient — suitable for use in hazardous locations where the surface temperature must stay below 135 °C.

MPN
6ES7405-0DA02-0AA