Shanghai Electric Machinery vs. Shangdian Motor (430363): Two Different Companies, Explained

Short answer: Shanghai Electric Machinery Co., Ltd. (上海电机厂, "SEM") and the company quoted on China's NEEQ market under code 430363 (short name 上海上电, often called "Shangdian Motor") are two separate companies. They share part of their history and are both nicknamed "Shangdian" (上电), which is why buyers mix them up. Today they have different owners, different scale and different product ranges. If you are buying motors, the only reliable way to know which company made yours is to check the manufacturer's full legal name on the nameplate, the certificate of conformity and the China Energy Label.

Who wrote this: shangdianmotor.com is run by 陕西摩拓尚电驱动技术有限公司, an authorized distributor of Shanghai Electric Machinery Co., Ltd. low-voltage motors. We are not the factory itself, and we are not affiliated with company 430363. We answer this question for customers almost every week, so we wrote down what actually matters when you place an order.

Comparison at a glance

Why the two names get confused

The confusion comes from translation and abbreviation, not from the companies themselves. One Chinese nickname, 上电 ("Shangdian"), is used for both:

• 上海电机厂 is often shortened to 上电 (Shang-hai + Dian-ji). The factory uses this short form itself; its internal news refers to "上电公司".

• 上海上电 (NEEQ 430363) also carries "上电" in its own name.

• In English the same factory appears as "Shanghai Electric Machinery", "Shanghai Electric Motor Factory", "Shanghai Electric Motor Works", "SEM" or simply "Shangdian Motor". Different sellers pick different translations.

So when a quotation, a WeChat message or a supplier list says only "Shangdian motor", it could mean either company. The table below shows how to read the names you will see.

Shanghai Electric Machinery Co., Ltd. (SEM): the 1949 factory

SEM was formed on 1 December 1949, when the former Shanghai Electrical Works No. 4 was reorganized into the Shanghai Electric Machinery Factory. It became one of the backbone motor makers of modern China:

• 1953: China's first turbo-generator, a 6,000 kW air-cooled unit.

• October 1958: the world's first double water-cooled turbo-generator (12,000 kW).

• Today: a core subsidiary of Shanghai Electric Group, based in Minhang District, Shanghai. It builds turbo-generators, large and medium AC/DC motors, wind generators, small and medium generators and complete drive and control systems.

For low-voltage buyers, SEM also produces IE3/IE4/IE5 class three-phase induction motors (YE3, YE4, YE5 series), explosion-proof motors (YBX5, YBBP), dust-ignition-proof motors (YFB4), inverter-duty motors and permanent-magnet synchronous motors (TYP). These are the products we supply as an authorized distributor.

NEEQ 430363 (上海上电): an independent specialist

The company quoted under code 430363 is a separate joint-stock company. Industry sources trace its origins to a restructuring connected with a former SEM motor branch. That shared background is the source of the similar name. Since then it has operated as its own legal entity, with its own shareholders and management. It is not part of Shanghai Electric Group's motor factory. Its business focuses on energy-efficient motors, special-purpose motors, spare parts and motor repair.

It is a legitimate manufacturer with its own customers. It is simply a different company. Whether it is the right supplier for you depends on your project, not on the name.

How to check which company actually made your motor

Names on a website or a quotation can be loose. These five documents cannot:

1. Nameplate. The manufacturer line should show the full legal name. For SEM this is 上海电气集团上海电机厂有限公司. "上电" or "Shangdian" alone proves nothing.

2. Certificate of conformity / factory test report. Look for the same full name and a serial number that matches the nameplate.

3. China Energy Label. YE3/YE4/YE5 motors must carry the energy label. The label names the producer, and its record number can be checked on the China Energy Label website.

4. Distributor authorization letter. Ask for a letter from the manufacturer that names the distributor, the product range and the valid dates. Check that the issuing company's name matches the nameplate.

5. Contract and invoice. Make sure the seller and the brand written on the contract match what you were quoted.

If a supplier cannot show these, treat the brand claim with caution, whichever name they use.

Which one should you choose?

• Large power-plant, metallurgy or petrochemical projects (high-voltage motors, generators, large custom machines): SEM is the established supplier, usually through direct project channels.

• Standard low-voltage motors (YE3/YE4/YE5, explosion-proof, inverter-duty, PMSM): both companies' products may be offered. Compare efficiency class, delivery time, warranty and service network, and confirm the manufacturer using the five checks above.

• Repair, spare parts or niche special motors: a specialist such as 430363 may be a good fit, depending on your requirements.

Frequently asked questions

Is Shangdian Motor the same company as Shanghai Electric Machinery?

Not necessarily. "Shangdian" (上电) is a nickname used for Shanghai Electric Machinery Co., Ltd. (上海电机厂). It is also part of the name of a separate NEEQ-quoted company (code 430363). Always ask for the manufacturer's full legal name.

Is company 430363 a subsidiary of Shanghai Electric Group?

No. It is an independent joint-stock company. It shares some history with Shanghai Electric Machinery but is not a branch or subsidiary of it.

When was Shanghai Electric Machinery founded?

On 1 December 1949. It built China's first turbo-generator in 1953 and the world's first double water-cooled turbo-generator in 1958.

How can I verify that my YE3/YE4/YE5 motor was made by Shanghai Electric Machinery?

Check that the nameplate, the certificate of conformity and the China Energy Label all show 上海电气集团上海电机厂有限公司 as the manufacturer, and that the serial numbers match.

Is shangdianmotor.com the official website of Shanghai Electric Machinery?

No. shangdianmotor.com belongs to an authorized distributor of Shanghai Electric Machinery low-voltage motors. We supply genuine SEM products with factory documents. For large generators and high-voltage project equipment, we can refer you to the factory's own sales channels.

Need help confirming a motor or a quotation?

Send us the nameplate photo, model number or quotation you received. We will tell you who the manufacturer is and whether the specification fits your application. If you need SEM low-voltage motors, we can quote with the factory certificate and energy label included. Contact us or browse SEM low-voltage motors.