Triangle with wavy lines (caution, hot surface)
The marked part can be hot. Do not touch it without taking care.
Symbol reference: IEC 60417-5041
A mark tells you what the maker declares, never that the product is safe.
- What it looks like
- A triangle with three vertical wavy lines rising from a short line inside it.
- Who may apply it
- The equipment maker. The IEC entry lists it as referenced in many household-appliance safety standards (the IEC 60335-2 parts).
What it does not promise
It does not say how hot, or when. A part without the symbol can still be hot during and after use.
Other marks with the same shapes
Sources
Each page below was fetched and read on the date shown. Where a symbol’s IEC 60417 or ISO 7000 number is given, a public page listing that number is among them.
- Wikimedia Commons: File page transcribing IEC 60417 entry 5041 (title, function, notes) — Symbol 5041 from IEC 60417, “Caution, hot surface”: to indicate that the marked item can be hot and should not be touched without taking care. The inner symbol is ISO 7000-0535; warning signs are standardised in ISO 3864. Referenced in IEC 60335-2-6, 60335-2-9, 60335-2-11 and others. Checked 2026-09-24.
Written in our own words; quotations are the sources’ wording.