Automotive and transportation is one of the six application categories listed on the company's site, and this guide treats it as a category for specification checks. It names no vehicle, no vehicle model, no part and no performance figure, because none is published for this category on the company's pages. What it does is walk through the checks that matter when a magnet is considered for automotive or transportation use, in the order a buyer should make them, so that the inquiry that follows can be answered rather than returned with questions.
Temperature first in automotive use
Vehicles generate heat, and transportation equipment operates across a wide ambient range, so temperature is the first check in this category rather than an afterthought. State the temperature the magnet will actually see, including heat from neighbouring components and from sustained operation, and discuss the grade series against the shared temperature table: N35–N52 at 80°C, M series at 100°C, H series at 120°C, SH series at 150°C, UH series at 180°C and EH series at 200°C. A series chosen from its name without its temperature row has not been specified for automotive heat at all, and an inquiry that states the temperature explicitly lets the review confirm the series discussion instead of inferring it.
Vibration and fixing belong in the same first pass. A magnet in a vehicle is subject to movement, and its fixing — whether by a hole, a housing, an adhesive assembly or a pot category — affects which mating dimensions matter. The assemblies page lists eight category names with no per-category figures, so any assembly requirement needs its own dimensions in the inquiry. A countersunk fixing, where the hole range M1–M10 belongs to the countersunk shape family, must not be confused with a ring inner diameter, and the countersunk ring guide on this site separates the two figures for exactly this kind of inquiry.
Shape, direction and environment, checked together
Shape selection follows the same rule as everywhere on this site: read the detail page for the shape needed, check dimensions against that shape's published range, and copy the magnetization direction exactly as listed for that shape. Automotive context does not add a shape, a size or a direction to any range, and it does not license borrowing a figure from another shape's table. If the geometry does not fit any of the six published shapes, the custom-shape route is the correct next step, with a dimensioned sketch and the direction described in plain words, rather than a forced fit into the nearest shape.
Environment should be described where it affects the choice: temperature range over time, exposure to moisture or fluids where relevant, and any housing or coating question. Coating is an open question on this site — please confirm coating requirements before ordering — because coating type names were not transcribed from the company's illustration. Stating the environment as a question, with the conditions the magnet will actually face, is more useful than assuming a coating type from a category name, and it lets the review answer specifically rather than generally.
What this category page does not claim
Nothing on this page claims that magnets have been supplied for automotive or transportation use, to any vehicle maker, or for any particular part. Application categories on the company's site are headings, and this site preserves them as headings. A buyer who needs evidence of supply for a specific automotive use should ask for it explicitly in an inquiry, and should not treat the existence of a category page as evidence of supply. The same restraint applies to every category guide on this site: clean energy, consumer products, electronics, industrial fields and medical devices are all headings for checks, not records of supply.
That restraint is not a gap in the guide; it is the guide's honesty. A category page that invented customers, models or results would be easier to read and harder to trust, and a buyer who ordered on the basis of invented results would be ordering on fiction. The verifiable content — six shape ranges, a shared temperature table, per-shape direction lists and an inquiry checklist — is sufficient to write a specification that can be confirmed, and that is what this guide is for.
Questions to send with an automotive application inquiry
A specification that can be answered names four items together: the shape family, dimensions inside that family's published range, the grade temperature series, and the magnetization direction exactly as listed for that shape. Add the operating temperature and the fixing method where they affect the choice, and ask coating and warranty as open questions. Please confirm minimum order quantity and lead time before ordering. Warranty terms are unavailable on the published pages — please confirm warranty terms before ordering. Certificates are available upon request; no certificate number or issuing body is published here.
An inquiry that names only a grade, or only a size, will be answered with questions rather than a confirmation, because neither item alone is a complete specification. The extra sentence that states the direction in plain words, or that gives the mating dimension for a fixing, is often the sentence that prevents a second round of correspondence, and it costs nothing to include at the start.
Frequently asked questions
Which grade series should I discuss for neodymium magnets in automotive & transportation?
Discuss the grade series against the shared grade maximum working temperature table, using the temperature the magnet will actually see in service, including heat from neighbouring parts. The series run from N35–N52 at 80°C through the M series at 100°C, the H series at 120°C, the SH series at 150°C and the UH series at 180°C to the EH series at 200°C. State the operating temperature as a figure in the inquiry, because a grade name without its temperature row has not been specified for a warm environment, and the review needs the temperature to confirm the series discussion rather than infer it from a name alone.
How exactly should I state the magnetization direction?
Copy the direction exactly as listed for the shape named in the inquiry, and do not substitute a synonym that feels equivalent, because the same word can describe a different arrangement on a different shape. Where a drawing uses a different convention, add a plain-words description of the pole positions alongside the listed term, so the review can reconcile the two without guessing. A direction that is assumed rather than confirmed is a common source of a magnet that is dimensionally correct and magnetically wrong for its fixing, so the extra sentence describing the poles is worth writing even in a short inquiry.
What should I ask about coating, warranty and certificates?
Please confirm coating requirements before ordering, because coating type names were not transcribed from the company illustration and no coating type is named on this site; state the operating environment with the coating question so the answer can be specific. Warranty terms are unavailable on the published pages, so please confirm warranty terms before ordering rather than assuming a term. Certificates are available upon request: name the certificate required and its purpose in the inquiry, because no certificate number, issuing body, scope or validity period is published here, and a named request can be matched to the order it belongs to.
What if my size or combination is not in the published range?
Ask whether it can be made, and send the dimension as written rather than rounding it into the published range. A value outside a shape range, a direction not listed for that shape, or a combination of features from two shapes should be raised as an explicit question, with a dimensioned sketch where the geometry is curved, holed or otherwise not captured by a single size figure. Please confirm minimum order quantity and lead time before ordering. A question asked before ordering costs one message; a forced fit into the nearest published table can cost the whole part, because a magnet that matches its order and fails its fixing is worse than an extra round of questions.