KTM19x1 series TMR based magnetic switches

The sensors in the KTM19x1 family are magnetic switch sensors based on the tunnelmagnetoresistive (TMR) effect. 

The sensors offer

  • Very small size (SOT 23-3L package)
  • Low power consumption
  • wide supply voltage range 1.8 V to 5.5 V
  • extended ambient temperatur range -40 °C to +125 °C

This product family has two sensor variations for you to choose from.

  • KTM1901 with omnipolar detection range
  • KTM1911 with south-pole detection range

Suitable for different switching applications e.g.:

  • non.contact end-point detection
  • water-, electric- or gas-meters
  • switch detection for laptops

General information

The sensors of the KTM19x1 sensor family are magnetic sensors with integrated tunneling magnetoresistance (TMR) and CMOS technology for use in industrial and consumer switch applications. The temperature compensation circuitry improves stability of magnetic switch points over the whole operating range.

The sensors have a wide operating voltage range (1.8 V up to 5.5 V) and a wide operating temperature
range up to +125 °C.

The sensor output is equipped with a push-pull stage and provides a high output frequency with a very low average power consumption.


The KTM19x1 sensors are available in SOT23-3L packages.

Product variants

NameCasingOperation pointRelease pointFrequencyPower consumption
KTM1901SOT23-3L±18 G±12 G1 kHz3.4 µA
KTM1911SOT23-3L+18 G+12 G1 kHz3.4 µA

KTM1901

The KTM1901 is an omnipolar magnetic sensor with integrated tunneling magnetoresistance (TMR) and CMOS technology for use in industrial and consumer switch applications. The temperature compensation circuitry improves stability of magnetic switch points over the whole operating range. The KTM1901 has a wide operating voltage range and a wide operating temperature range. The sensor output is equipped with a push-pull stage and provides a high output frequency with a very low average power consumption.
The KTM1901 are available in SOT23-3L packages.

KTM1911

The KTM1911 is magnetic sensor with integrated tunneling magnetoresistance (TMR) and CMOS technology for use in industrial and consumer switch applications for detection of a magnetic south pole. The temperature compensation circuitry improves stability of magnetic switch points over the whole operating range. The KTM1911 has a wide operating voltage range and a wide operating temperature
range. The sensor output is equipped with a push-pull stage and provides a high output frequency with a very low average power consumption.
The KTM1911 are available in SOT23-3L packages.

Data sheets

  • KTM1901

    Onmipolar magnetic switch sensor

  • KTM1911

    South pole magnetic switch sensor

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