Brand: Siemens

Siemens 1LA7 IEC Squirrel-Cage AC Motor

Name: Siemens 1LA7 IEC AC Motor | Seven Star LLC
Brand: Siemens

Description

Overview: The Standard Workhorse of Industrial Drive Applications

The Siemens 1LA7 IEC Squirrel-Cage AC Motor is a low-voltage induction motor with an aluminum frame, part of Siemens’ broader 1LA/1LG/1MA family of IEC squirrel-cage motors covering sizes 56 through 450 and outputs from 0.06 kW to 1000 kW across the full catalog range. The 1LA7 specifically covers the aluminum-frame, self-ventilated, IP55-rated segment of this range, spanning approximately 0.06 kW to 18.5 kW, and is designed as a rugged, uncomplicated motor for standard industrial drive tasks.

As a trusted supplier of Siemens low-voltage motors, Seven Star LLC sources and supplies the 1LA7 IEC squirrel-cage motor to refineries, manufacturing plants, and utility operations across Oman and the wider GCC. Because motor frame size, pole count, and mounting configuration must be matched precisely to the driven equipment, Seven Star LLC helps engineering teams specify the correct 1LA7 variant for pumps, fans, conveyors, and general industrial drive applications.

Working Principle: Squirrel-Cage Induction Drive

The 1LA7 operates as a standard three-phase squirrel-cage induction motor: current in the stator windings creates a rotating magnetic field, which induces current in the rotor’s short-circuited conductor bars (the squirrel cage), generating torque that drives the rotor to follow the rotating field at a speed slightly below synchronous speed (the slip). This robust, brushless design requires no external rotor connection, giving the 1LA7 the ruggedness and lack of maintenance-intensive components that Siemens highlights as key to the motor family’s extremely long service life.

The 1LA7 is classified as an IE1 standard-efficiency motor, meaning its efficiency classification sits at the baseline tier under IEC 60034-30 energy-efficiency standards – a straightforward, easily selected efficiency class suited to standard drive tasks where the primary requirements are reliability and cost-effectiveness rather than maximum energy savings, with higher-efficiency alternatives such as the 1LA9 (IE1 aluminum, high efficiency) or 1LA6 (cast iron, high efficiency) available within the same broader Siemens IEC motor family for applications prioritizing efficiency.

Engineering Design of the 1LA7 Motor

The 1LA7 is built with an aluminum enclosure rated IP55, providing protection against dust ingress and water jets from any direction, and is self-ventilated using a shaft-mounted fan rather than a separately powered cooling fan, simplifying the overall motor package. Foot-mounted and flange-mounted configurations are both available, and the motor is offered across 2, 4, 6, and 8-pole variants to match a wide range of driven-equipment speed requirements, with dual voltage ratings (such as 230V/400V) supporting both delta and star connection depending on supply configuration.

Explosion-protected variants of the 1LA5/1LA7 family are also available for use in areas with dust explosion hazards (rated for Zone 22 per EN 50281 and ATEX 118a), with surface temperatures limited to 125°C during normal operation and an external earthing terminal fitted in addition to standard grounding, reflecting the additional safety measures required for hazardous dust environments.

Key Features

The Siemens 1LA7 IEC Squirrel-Cage AC Motor delivers rugged, reliable performance for standard industrial drive tasks. Key characteristics include:

Aluminum frame construction with IP55 protection rating.
IE1 standard efficiency classification per IEC 60034-30.
Self-ventilated design using a shaft-mounted cooling fan.
Foot-mounted or flange-mounted configurations available.
2, 4, 6, or 8-pole variants covering a wide range of output speeds.
Output range of approximately 0.06 kW to 18.5 kW across the 1LA7 line.
Explosion-protected (dust) variants available for Zone 22 hazardous area installation.

Industrial Applications

The 1LA7 motor is deployed across refinery utility systems, manufacturing plant conveyor and pump drives, HVAC fan applications, and general industrial machinery wherever a standard, reliable three-phase induction motor is required. Its rugged, low-complexity construction makes it particularly well suited to continuous-duty applications where simplicity and long service life matter more than premium efficiency tiers.

Seven Star LLC supports refinery engineering teams, manufacturing plant operators, and facilities maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Siemens 1LA7 IEC motors, helping projects specify and maintain reliable standard-duty motor drives.

Technical Specifications

The table below summarizes representative specifications of the Siemens 1LA7 IEC Squirrel-Cage AC Motor as supplied by Seven Star LLC (exact values vary by frame size and pole configuration ordered).

Parameter	Specification
Model	Siemens 1LA7 Series
Motor Type	Three-phase squirrel-cage induction motor
Frame Material	Aluminum
Efficiency Class	IE1 (standard efficiency)
Protection Rating	IP55
Cooling	Self-ventilated (shaft-mounted fan)
Output Range	Approx. 0.06 kW to 18.5 kW
Poles	2, 4, 6, or 8
Mounting	Foot or flange
Supply Voltage	Typically 230V/400V (dual voltage, delta/star)

Why Choose Seven Star LLC for Siemens 1LA7 IEC AC Motors

Replacing an industrial induction motor is straightforward on paper but easy to get wrong in practice — frame size, mounting configuration, IP rating, and duty class all have to match the driven equipment exactly, especially when a motor is being swapped into an existing pump, fan, or compressor skid. Seven Star LLC checks frame and mounting compatibility against your existing equipment before shipment, so the 1LA7 motor you receive bolts straight in without on-site rework. As the trusted regional supplier we also support GCC customers with motor rewind-versus-replace guidance, coordinated logistics for time-sensitive shutdowns, and planning for common spare motors across facilities in Muscat, Sohar, and Salalah, keeping rotating equipment uptime predictable rather than reactive.

Request a Quote for Siemens 1LA7 IEC Squirrel-Cage AC Motor

Seven Star LLC supplies the Siemens 1LA7 IEC squirrel-cage AC motor with datasheet documentation and regional technical support. Contact our automation and drives division for a formal B2B quotation, to confirm the correct frame size, pole count, and mounting configuration for your driven equipment, or to obtain the complete technical datasheet.Seven Star LLC supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

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About brand

Siemens is the German technology group whose industrial products include SIMATIC controllers and HMIs, SINAMICS drives, SIRIUS and SENTRON switching and protection devices, SIPROTEC protection relays, SITRANS process instruments, SCALANCE networks and process analysers. It was founded in Berlin on 12 October 1847 by Werner von Siemens and the precision mechanic Johann Georg Halske as Telegraphen-Bauanstalt von Siemens & Halske, to build Siemens's newly designed pointer telegraph. Siemens AG is headquartered in Munich and listed on the Frankfurt Stock Exchange; its energy business was spun off as Siemens Energy in 2020.

Siemens company profile

Founded	12 October 1847, Berlin, Germany, as Telegraphen-Bauanstalt von Siemens & Halske, with 10 employees
Founders	Werner von Siemens (1816–1892) and Johann Georg Halske (1814–1890)
First product	The pointer telegraph designed by Werner von Siemens
Headquarters	Munich, Germany (Siemens AG)
Ownership	Public company listed in Frankfurt; Siemens Energy (2020) and Siemens Healthineers are separately listed companies
Businesses acquired that appear in our range	Moore Products (bought in 2000; APACS and QUADLOG control systems), Applied Automation (Maxum process gas chromatographs); small industrial gas turbines such as the SGT-300 came with Alstom's industrial turbine business in 2003
Product families	SIMATIC S7 PLCs, ET 200 distributed I/O and HMI panels, TIA Portal software, SINAMICS drives, SIMOTICS motors, SIRIUS and SENTRON low voltage devices, SIVACON switchboards, SIPROTEC relays, SITRANS instruments, SCALANCE network components, building technology valves and sensors

Milestones

1847: Siemens & Halske starts work in Berlin with 10 employees.
1848: The company wins the contract for Europe's first long-distance telegraph line, Berlin to Frankfurt am Main.
1856: 330 employees, two-thirds of them working on telegraph networks in Russia.
1866: Werner von Siemens describes the dynamo-electric principle, the basis of the electric generator.
1958 onwards: The SIMATIC name is used for Siemens industrial automation; S7 PLCs follow in the 1990s and S7-1500 in 2012.
2020: Siemens Energy is spun off and listed separately.

Choosing Siemens automation products

A Siemens order number (MLFB) identifies the exact product: 6ES7 is SIMATIC automation, 6AV is HMI, 6GK is industrial communication, 6SL is SINAMICS drives, 3R is SIRIUS control and 5SY is SENTRON miniature circuit breakers. For PLCs, S7-1200 is the compact controller for small machines, S7-1500 is the current mid-to-high range controller, and S7-300 and S7-400 are older platforms still running in many plants; S7-300 is being phased out, so spares and migration to S7-1500 are common requests. When replacing a CPU or module, the full order number including the version digits matters, because firmware and hardware versions affect compatibility with the existing project.

Where Siemens products are used

In Oman and the GCC, Siemens automation runs in oil and gas, power and desalination plants, water networks, cement and process industries. Maxum gas chromatographs analyse gas composition in gas plants and refineries, SIPROTEC relays protect substations, SGT-300 turbines drive generators and compressors, and Siemens building valves are used in HVAC systems.

Siemens products we list

Family	Examples
SIMATIC controllers and I/O	S7-1500, CPU 1515-2 PN, S7-1200, CPU 1214C, S7-300, S7-400H CPU 412-5H, ET 200SP, IM 153-2
HMI and networking	KTP700 Basic, TP700 Comfort, TP1200 Comfort, SCALANCE XC208, SCALANCE WAM766, PROFIBUS OLM
Drives, motors and power distribution	SINAMICS G120C, SINAMICS G120X, 1LA7 motor, SIVACON S8, SIPROTEC 7SJ85, 5SY4510-7 MCB
Process instruments	SITRANS P320, MAG 5100W, SITRANS TH320, SITRANS TS500, SITRANS TR200
Maxum II analyser spares	FID 302A detector, FPD II assembly, filament detector, Model 50 valve, SYSCON kit, air bath heater
APACS and QUADLOG spares	QLCCM24AAN, QLSAMBAN, QLSDM024DCCBN, 39SAMCAN, 16137-151 M-BUS cable
Building technology	VPI46 PICV, VPF44, QFM1660 sensor

Ordering Siemens products: what we need

Send the full order number from the label (for example 6ES7214-1AG40-0XB0) and, for PLC and HMI parts, the hardware and firmware version (FS and V numbers). For Maxum II and APACS spares, send the Siemens part number such as 2021651-002. For drives, add the motor power and supply voltage.

Facts checked against Siemens's published history timeline, October 2026.

FAQ

Questions about the Siemens 1LA7 IEC Squirrel-Cage AC Motor

Answers from our engineering team on installation, compatibility and integration.

01What efficiency class is the 1LA7 motor?

The 1LA7 is classified as IE1 standard efficiency under IEC 60034-30, suited to standard drive tasks where reliability and cost-effectiveness are the priority.

02What protection rating does the 1LA7 have?

The motor has an IP55 protection rating, providing protection against dust ingress and water jets from any direction.

03What output range does the 1LA7 cover?

The 1LA7 aluminum-frame line covers approximately 0.06 kW to 18.5 kW, within Siemens broader IEC motor catalog spanning 0.06 kW to 1000 kW.

04Is an explosion-protected version available?

Yes, explosion-protected variants are available for dust-hazardous areas (Zone 22 per EN 50281 and ATEX 118a), with surface temperature limited to 125 degrees C.

05Does Seven Star LLC supply this part across the GCC?

Yes, Seven Star LLC sources and supplies the Siemens 1LA7 IEC squirrel-cage motor to refinery, manufacturing, and utility customers across Oman and the wider GCC region.