This is what a buyer checks before they shortlist electrical and electronics suppliers.
What does a buyer check before selecting an electric motor?
They check power and speed against the driven load, the frame size and mounting against the machine, and the efficiency class, because minimum efficiency levels are now mandatory in most markets. Frame and mounting decide whether it is a drop-in replacement.
A maintenance engineer needs a motor that will bolt straight onto an existing machine without modification.
Last corpus review: 4 August 2026 · Written for electric motor manufacturers selling to business buyers
What does a buyer check before selecting an electric motor?
What buyers check in electrical and electronics
Three things, in order: what the product is, what the paperwork proves, and when each document gets asked for.
Power, speed, current, efficiency, power fa…
Motor datasheet
Asked at: selection
Electrical tests on the delivered motor
Routine test certificate
Asked at: acceptance
Conformity with the mandatory efficiency le…
Efficiency class certification
Asked at: regulatory compliance
First, what the product is
The fields a buyer scans before deciding whether you are worth contacting. Missing one of them usually ends the visit without an email.
- 1
Rated power and speed
The basic duty specification.
- 2
Frame size and mounting arrangement
Determines whether it fits without modification.
- 3
Efficiency class
Mandatory minimum levels apply in most markets.
- 4
Enclosure and ingress protection rating
Decides suitability for the environment.
- 5
Insulation class and temperature rise
Governs life at the operating temperature.
- 6
Duty type
Continuous, intermittent and short-time ratings differ.
- 7
Voltage, frequency and connection
Must match the supply and the starter.
Then the paperwork
Naming the documents you can issue is what separates a supplier who can be audited from one who cannot.
| Document | What it proves | Where it belongs |
|---|---|---|
| Motor datasheetAsked at: selection | Power, speed, current, efficiency, power factor and dimensions | Publish it |
| Routine test certificateAsked at: acceptance | Electrical tests on the delivered motor | Per shipment |
| Efficiency class certificationAsked at: regulatory compliance | Conformity with the mandatory efficiency level for the market | Publish it |
| Type test reportAsked at: technical evaluation | Full performance testing of the design | Name it, share on request |
| Dimension drawingAsked at: mechanical design | Frame, shaft and mounting dimensions | Publish it |
| Hazardous area certificationAsked at: hazardous installations | Certification for explosive atmospheres where required | Name it, share on request |
| Declaration of ConformityAsked at: before sale in regulated markets | Conformity with the applicable directives | Publish it |
The shortlist moment
A buyer lines up a few suppliers and keeps the ones whose proof is easy to check. The rest get a closed tab, not an email.
The buyer asks: What does a buyer check before selecting an electric motor?
A few suppliers get compared side by side:
A supplier with Motor datasheet on the page
Power, speed, current, efficiency, power factor and dimensions
A supplier with Efficiency class certification on the page
Conformity with the mandatory efficiency level for the market
A supplier with Dimension drawing on the page
Frame, shaft and mounting dimensions
Is one of them you?
What Plact does for electrical and electronics suppliers
Four jobs, done on your site. Each one is a document buyers in this industry already ask for.
Put the Motor datasheet on the page buyers check
Power, speed, current, efficiency, power factor and dimensions
Put the Efficiency class certification on the page buyers check
Conformity with the mandatory efficiency level for the market
Put the Dimension drawing on the page buyers check
Frame, shaft and mounting dimensions
Put the Declaration of Conformity on the page buyers check
Conformity with the applicable directives
What a useful enquiry looks like
A form that collects these fields can be answered properly the first time. A form that collects a name and a message cannot.
Enquiry form · electric motors
Enough to reply usefully, short enough that a buyer finishes it.
- Power, speed and voltage required
- The core duty.
- Driven equipment and load characteristics
- Starting torque requirements vary enormously.
- Frame and mounting required
- Determines fit.
- Environment and protection rating
- Wet, dusty and hazardous areas change the motor.
- Efficiency class required
- Often set by regulation or corporate policy.
- Motor being replaced
- The fastest route to a correct offer.
An enquiry from this search asks for
- Power, speed and voltage required
- Driven equipment and load characteristics
- Frame and mounting required
- Environment and protection rating
Questions suppliers ask
What is the most useful page for a motor manufacturer?
A dimension and frame table cross-referenced to the standard frame designations. Most motor purchases are replacements, and the buyer's question is whether yours fits the existing base. A table answers it in seconds and gets found by dimension searches.
How should efficiency be presented?
As the class under the standard the market recognises, with the measured efficiency at full and part load. Efficiency classes are regulated, so the class is a legal statement, and the part-load figures are what an engineer uses to estimate real running cost.
Do buyers need hazardous area information on the main page?
Enough to know whether a certified version exists and to which protection concept. Hazardous area buyers are a specific market with hard requirements, and being findable by them is worth far more than the space it takes.
Documents and standards named here are the ones buyers in this industry commonly ask for; requirements vary by market, customer and contract, so treat this as a starting checklist rather than a compliance list. Clearer pages can help discovery and evaluation. They do not guarantee rankings, AI citations, enquiries or revenue.
Plact Research. Plact's editorial desk for buyer-evidence research. Industry standards, documents and buyer questions are researched and drafted with Plact's AI tools, then reviewed by Praveen Kavuri before publication. Every claim cites the standard, regulation or public source it rests on.
Related buyer questions
- Electronics and EMSWhat does a buyer check before sending you Gerbers or a bill of materials?
- Electronics manufacturingWhat does a brand check before placing electronics manufacturing?
- Cables and wiringWhat does a buyer check before ordering cable?
- Electrical equipmentWhat does a contractor check before specifying switchgear or panels?
Get your free review
A free review of what a buyer finds when they look for electrical and electronics suppliers, and what to fix first.