Four things decide which thermal switch fits your product: supply voltage, number of heat levels, mounting position and appearance.
1. Supply voltage
Products running from a USB power bank use 5V. Heated gloves and ski wear with their own lithium pack are usually 7.4V. Heating pads powered from a car socket or adapter are commonly 12V. Confirm this first, because a mismatch means weak heating at best and a damaged heating element at worst.
2. Heat levels
Three levels is the standard setup. Products worn for long periods can add a low keep-warm level, and zone-heated apparel needs a dual-key or multi-zone controller.
3. Mounting position
For switches sewn onto the garment surface, silicone models are soft and comfortable. Inline controllers suit pads and belts. Small round models fit gloves and knee pads.
4. Appearance and branding
Housing color, key icon and logo can all be customized. For private-label products it is best to settle these at the sampling stage.
If you are unsure, tell us the product type, voltage and expected volume and we will recommend a model and send samples.