HKZ121 查看數據表（PDF） - Siemens AG

零件编号

产品描述 (功能)

生产厂家

HKZ121

Hall-Effect Vane Switch

Siemens AG 

HKZ 121

Function

The Hall-effect switch is actuated by a soft-iron vane that passes through the air gap between

magnet and Hall-effect sensor. The vane short-circuits the magnetic flux before the hall-effect

sensor, as shown below. The open collector output is conductive (low) when the vane is

outside the air gap, and blocks (high) when the vane is introduced into the air gap. The output

remains high as long as the vane remains in the air gap. This static function does not require

a minimum operating frequency. The output signal shape is independent of the operating

frequency.

The circuit features integrated overvoltage protection against most of the voltage peaks occur-

ring in automotive and industrial applications. The output stage has a Schmitt trigger charac-

teristic. Most electronic circuits can be driven directly due to the open collector output current

of max. 40 mA.

a) Magnetic flux through the

Hall-effect switch

with no vane

in the gap

b) Magnetic flux

short-circuited by

the soft-iron

vane

Principle of Operation

Mechanical Characteristics

The Hall-effect vane switch is hermetically sealed in a special plastic package, so that it can

also be used under harsh environmental conditions. The package is waterproof, vibration-

resistant and resistant to gasoline, oil and salt. Two tubular rivets are incorporated in the

package to mount the sensor on its carrier plate. The circuit has three flexible leads for power

supply, output and ground.

Share Link: