HKZ121

Features:

·Contactless switch with open collector output (40 mA)
·Static switching
·High switching frequency
·Hermetically sealed with plastic
·Unaffected by dirt, light, vibration
·Large temperature and voltage range
·Integrated overvoltage protection
·High interference immunity
·Integrated capacitors for EMI protection


Specifications

Parameter	Symbol	Limit Values		Unit	Test Condition
		min.	max.
Supply voltage Output voltage in OFF-state	VS VQ	1.2 0.8	24 30 30	V V V	TA = 25
Inverse supply current (limited externally) Output current Inverse output current	IS IQ IQ		200 40 30	mA mA mA	TA 80 t 1 h without vane
Ambient temperature Storage temperature	TA Tstg	40 40	135 150
Thermal resistance system - air	Rth SA	-	170	K/W

Description

The Hall-effect vane switch HKZ 121 is a contactless switch consisting of a monolithic integrated Hall-effect circuit and a special magnetic circuit hermetically sealed in a plastic package. The HKZ121 switch is actuated by a soft-iron vane which is passed through the air gap between magnet and Hall sensor.

The main application field of HKZ121 is in cars, i.e. as a breakerless trigger in electronic ignition systems. Numerous industrial applications can be found in control engineering, especially in those areas where switches must operate maintenance-free under harsh environmental conditions (e.g. rpm sensor, limit switch, position sensor, speed measurement, shaft encoder, scanning of coding disks, etc.).