Capacitive, Magnetic and Piezo Switches

Capacitive, Magnetic, and Piezo Switches are types of electronic switches that operate based on different principles. Let's explore each of them:

  1. Capacitive Switches: Capacitive switches use the principle of capacitance to detect touch or proximity. They typically have a touch-sensitive surface that acts as one plate of a capacitor, while the other plate is usually a ground plane or a separate electrode. When a conductive object, such as a finger, comes close to or touches the touch-sensitive surface, it changes the capacitance, which is then detected by the switch's electronics. Capacitive switches are commonly used in touchscreens, touch-sensitive buttons, and proximity sensors.
  2. Magnetic Switches: Magnetic switches, also known as magnetic reed switches, use the presence or absence of a magnetic field to control the switch's operation. They consist of two metal reeds that are hermetically sealed within a glass tube. Each reed contains magnetically sensitive material. When a magnetic field is applied near the switch, the reeds are attracted to each other, and the switch closes, allowing current to flow. When the magnetic field is removed, the reeds separate, and the switch opens. Magnetic switches are often used in applications such as security systems, door and window sensors, and proximity sensors.
  3. Piezo Switches: Piezo switches utilize the piezoelectric effect to convert mechanical stress or pressure into an electrical signal. They consist of a piezoelectric material, such as certain crystals or ceramics, that generates an electric charge when subjected to mechanical deformation. When pressure or force is applied to the switch, it causes the piezoelectric material to deform, generating an electrical signal. This signal can be used to trigger a switching action. Piezo switches are commonly found in applications where a robust and reliable switch is required, such as industrial control panels, medical equipment, and automotive applications.

Each type of switch has its own advantages and limitations. Capacitive switches offer touch-sensitive and non-mechanical operation but may be affected by moisture or dirt. Magnetic switches are highly reliable and can operate in harsh environments but require the presence of a magnetic field. Piezo switches are durable and can withstand high forces, but they require mechanical pressure to operate and are typically more expensive.

Capacitive Switches
Capacitive Switches
Hall Effect Switches
Hall Effect Switches
Piezo Switches
Piezo Switches
Reed Switch Magnets
Reed Switch Magnets
Reed Switches
Reed Switches
Thumbwheel Switches
Thumbwheel Switches

1019 Products showing for Capacitive, Magnetic and Piezo Switches

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Otto IP64, IP68 Hall Effect Sensor 10 mA 1 mA Button Solder Linear, 85 °C, -40 °C, 5.5V, 4.5 V
  • RS Stock No. 294-252
  • Mfr. Part No. HPL-3322212
Subtotal (1 unit)
MYR526.97
MYR526.97/unit
Currently unavailable
RS PRO Capacitive switch Momentary NC Illuminated, Red, IP68 Brass
  • RS Stock No. 823-2788
Subtotal (1 unit)
MYR221.58
MYR221.58/unit
Stocked by manufacturer
Banner Capacitive switch Momentary Manual Illuminated, Red, Green, PNP, IP69K Polycarbonate
  • RS Stock No. 295-181
  • Mfr. Part No. K50APT2GRCQ
Subtotal (1 unit)
MYR1,157.52
MYR1,157.52/unit
In Stock
RS PRO SPCO Through Hole Reed Switch 500 mA 175 V
  • RS Stock No. 265-2246
Subtotal (1 unit)
MYR15.97
MYR15.97/unit
Stocked by manufacturer
Banner Capacitive switch Momentary NO Illuminated, Green, PNP, IP67, IP69K Polycarbonate
  • RS Stock No. 294-276
  • Mfr. Part No. K50APFF50GRCQ
Subtotal (1 unit)
MYR1,006.27
MYR1,006.27/unit
Stocked by manufacturer
Banner Capacitive switch Momentary NO Illuminated, Green, PNP, IP67, IP69K Polycarbonate
  • RS Stock No. 294-275
  • Mfr. Part No. K50APFF100GXDQ
Subtotal (1 unit)
MYR1,006.27
MYR1,006.27/unit
Temporarily out of stock
KEMET SPST Through Hole Reed Switch 500 mA 140 V ac
  • RS Stock No. 188-0972
  • Mfr. Part No. TRS5-115BLRU
Subtotal (1 unit)
MYR112.27
MYR112.27/unit
Temporarily out of stock
KEMET SPST Through Hole Reed Switch 500 mA 140 V ac
  • RS Stock No. 188-0927
  • Mfr. Part No. TRS5-125BLRU
Subtotal (1 unit)
MYR112.27
MYR112.27/unit
Currently unavailable
KEMET SPST Through Hole Reed Switch 100 mA 30 V dc
  • RS Stock No. 188-0909
  • Mfr. Part No. OHD5R-50B
Subtotal (1 unit)
MYR26.52
MYR26.52/unit
In Stock
APEM Capacitive switch, Green, Red, NPN
  • RS Stock No. 195-8745
  • Mfr. Part No. U7040
Subtotal (1 unit)
MYR131.22
MYR131.22/unit
In Stock
Assemtech SPST PCB Reed Switch 500 mA 140 V ac/dc
  • RS Stock No. 362-2495
  • Mfr. Part No. 2502-2522-020
Subtotal (1 unit)
MYR9.07
MYR9.07/unit
In Stock
EAO Capacitive switch Latching NO Illuminated, Green, IO-Link, IP69K
  • RS Stock No. 227-0833
  • Mfr. Part No. 84-ACKS-B13-04BC
Subtotal (1 unit)
MYR582.24
MYR582.24/unit
In Stock
RS PRO SPCO Through Hole Reed Switch 500 mA 200 V
  • RS Stock No. 265-2228
Subtotal (1 pack of 5 units)
MYR16.80
MYR3.36/unit
In Stock
RS PRO SPCO Through Hole Reed Switch 500 mA 200 V
  • RS Stock No. 265-2226
Subtotal (1 pack of 5 units)
MYR16.80
MYR3.36/unit
Temporarily out of stock
APEM Capacitive switch Latching Illuminated, Red, NPN
  • RS Stock No. 195-8743
  • Mfr. Part No. CG211AJ0RC
Subtotal (1 unit)
MYR282.68
MYR282.68/unit
In Stock
APEM Illuminated Piezo Switch, 1 NO, IP68 Stranded Wire, 200mA, 70 °C, -25 °C Natural
  • RS Stock No. 283-6408
  • Mfr. Part No. PBARZ1C0000Y2A
Subtotal (1 unit)
MYR616.21
MYR616.21/unit
In Stock
Assemtech SPST PCB Reed Switch 500 mA 200 V
  • RS Stock No. 171-8471
  • Mfr. Part No. RI-27
Subtotal (1 pack of 10 units)
MYR87.97
MYR8.797/unit
Limited stock
Assemtech CO PCB Reed Switch 1 A 400 V
  • RS Stock No. 909-2825
  • Mfr. Part No. GC1917 (80-100AT)
Subtotal (1 bag of 10 units)
MYR551.79
MYR55.179/unit
In Stock
Assemtech SPST-NO PCB Reed Switch 500 mA 200 V
  • RS Stock No. 909-2588
  • Mfr. Part No. RI-03 Kit
Subtotal (1 kit)
MYR17.10
MYR17.10/kit
In Stock
Assemtech SPST-NO PCB Reed Switch 500 mA 200 V
  • RS Stock No. 909-2639
  • Mfr. Part No. RI-27 Kit
Subtotal (1 kit)
MYR22.56
MYR22.56/kit
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