1、Electronic Characteristics
Operating voltage: DC35V 1W
Operating current: 100mA
Contact resistance: 10Ω
Insulation resistance: 100MΩ (100VDC)
Dielectric withstand voltage: 250VRms (50-60Hz1min)
Contact jitter time: ≤5ms

2、Mechanical Properties
Service life: Pin spacing standard: 2.54mm
Line thickness: ≤ 0.13mm

3、Environmental Parameters
Storage temperature: 15°C-35°C
Storage humidity: 70%-90%
Test temperature: 0°C-60°C 16H
Test humidity: 70%-90%
Atmospheric pressure: 86~106kDa

How keypad works & How to scan them?
The working principle is very simple. Pressing a button shorts one of row lines to one of column lines, allowing current to flow between them.
Keypad pins are divided into 2 groups: row and column.
The membrane is soft and has a removable paper backing to expose a strong adhesive so you can stick this on an enclosure and feed the cable through a slot.