IEBTIIENEN004-2025-BTI3837419803000
A spring
This spring is used inside a volume switch button, see attached photos.
The spring provides the haptic response that indicates the switch’s on/off state.
Phosphorus bronze
A phosphorus bronze spring is manufactured by drawing the alloy into wire or strip, shaping it into the desired spring form (coiling, stamping, or bending), heat-treating to relieve stress, and then finishing with cleaning or plating before final testing.