Siemens

Siemens A5E00079742 | Siemens | Modular Power Supply Unit

SKU A5E00079742

In stock
  • 12-month warranty
  • Free returns within 30 days

  • Manufacturer: Siemens

  • Product No.: A5E00079742

  • Country of origin:Germany

  • Product Type: Power supplies

  • Barcode: 85371099

  • Payment: T/T, Western Union

  • Weight: 520g

  • Shipping port: Xiamen

  • Warranty: 12 months

The A5E00079742 is a specialized Modular Power Supply Unit (PSU) engineered for industrial automation systems. It is designed to convert standard AC input voltages into a precise, regulated +3.3V DC output, suitable for powering low-voltage logic components, control modules, or sensor arrays within an automation cabinet. This unit is characterized by its compact, modular design, making it an ideal candidate for integration into complex, space-constrained industrial control architectures.

Features

  • Flexible AC Input: Supports a standard industrial input range of 120V to 230V AC, operating at 50/60 Hz frequencies.
  • Precise DC Output: Delivers a stable +3.3V DC output at a rated current of 4.2A.
  • Modular Design: Optimized for mounting within a larger rack or modular control system backplane.
  • Reliability: Built to Siemens quality standards to ensure long-term stability and protection against fluctuations in the main supply voltage.

Applications

  • Powering low-voltage digital logic boards and peripheral I/O modules.
  • Providing stable supply rails in modular PLC or HMI architectures.
  • Maintenance and repair of legacy control systems where 3.3V logic is required.

Technical Specifications

Parameter Specification
Manufacturer Siemens
Model A5E00079742
Product Type Modular Power Supply
Input Voltage 120 / 230 V AC
Input Frequency 50 / 60 Hz
Output Voltage +3.3 V DC
Output Current 4.2 A
Weight 0.52 kg
Product Phase Obsolete
Commodity Code 85371099

Installation Guidelines

  • Ventilation: Despite the compact size, ensure the unit has sufficient airflow in the control cabinet to prevent overheating. Avoid mounting other high-heat-generating components directly above or below this PSU.
  • Wiring: Connect the AC input lines according to local electrical codes, ensuring the ground (PE) terminal is securely bonded to the control cabinet's primary ground bus.
  • Voltage Verification: Before connecting the DC output to your load, use a multimeter to verify the output voltage at the terminals to ensure it matches the 3.3V requirement, particularly if this is being integrated into an older system.
  • Maintenance: Since this component is marked as "Obsolete," prioritize regular inspection of its connection terminals for signs of corrosion or overheating during scheduled maintenance intervals.

FAQ

What is the primary output specification of the A5E00079742?
The module provides a regulated +3.3V DC output at a maximum current of 4.2A.

What input voltages does this power supply support?
It is designed for standard industrial input voltages of 120V AC or 230V AC at 50/60 Hz.

What is the status of this power supply in the current market?
This product is currently classified as 'Obsolete,' meaning it is no longer in active production and is primarily sourced for maintenance or legacy system support.

View all FAQs →

A5E00079742
Quantity
Call sales Contact
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
Reviews

More from this brand

Siemens 3RW4447-6BC45 SIRIUS 3RW44 Soft Starter
3RW4447-6BC45Siemens 3RW4447-6BC45 SIRIUS 3RW44 Soft Starter
Siemens 6ES7216-2BD23-0XB0 SIMATIC S7-200 CPU 226 Compact Unit
6ES7216-2BD23-0XB0Siemens 6ES7216-2BD23-0XB0 SIMATIC S7-200 CPU 226 Compact Unit
Phoenix Contact IBS S5 DSC/I-T 2752000 Termination Board for Siemens SIMATIC S5 PLCs
IBSS5DSC/I-T 2752000Phoenix Contact IBS S5 DSC/I-T 2752000 Termination Board for Siemens SIMATIC S5 PLCs
BECKHOFF KL8001 Bus Terminal Power Terminal for Siemens Contactor
KL8001BECKHOFF KL8001 Bus Terminal Power Terminal for Siemens Contactor
  • A5E00079742
1 1
Only 8 item(s) left in stock
View full details
Product Description
Shipping Returns
Additional details
Reviews

RECOMMENDED RELATED MODELS

Product Image Model Number / Title Condition Availability Action
1746-P4 Allen-Bradley 1746-P4 SLC 500 Power Supply Original New In Stock View Details

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern
White
Country of origin
Germany
Power source
AC-powered

Technical knowledge

Beckhoff IPC used for a first TwinCAT PLC project

First TwinCAT PLC Project on a Beckhoff IPC

Build and verify a first TwinCAT PLC project on a Beckhoff IPC. This checklist covers target selection, EtherCAT discovery, I/O mapping, safe activation, restart tests, and commissioning records.

OPC UA industrial connectivity software diagram for server commissioning

Commissioning OPC UA in KEPServerEX: A Field Checklist

A practical commissioning sequence for KEPServerEX OPC UA connections: define data ownership, test tags locally, configure endpoint and certificate trust, limit access, then verify failure recovery...

Laptop Ethernet settings used during PLC commissioning

Set a PLC Commissioning Laptop IP Without Losing Access

Commissioning an Ethernet-connected PLC often starts with the laptop, not the controller. Learn how to record existing settings, choose a temporary address, test connectivity, and restore the plant...

How Combustible Dust Hazards Affect Automated Process Control

Designing Automation for Combustible Dust Hazards

Combustible dust controls require more than alarms. Learn how to map dust generation, select instrumentation, design interlocks, handle failed feedback, test safe states, and maintain the full...

Rectangular hairpin conductors installed in an electric motor stator

Hairpin Stators: Benefits, Limits, and Inspection

Hairpin windings raise slot fill and support compact traction motors, but conductor geometry, AC losses, insulation damage, weld quality, and cooling determine whether the design meets its targets.

Ansible control node managing SCADA infrastructure hosts

Using Ansible for Controlled SCADA Server Changes

Use Ansible to standardize SCADA server changes without expanding OT risk. This guide covers inventories, idempotent playbooks, staged testing, credentials, logging, and practical rollback controls.