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The SS421 Series Adjustable Hall-effect Under-speed Detectors are designed to monitor fan or motor performance. This temperature-compensated, Hall-effect IC contains a timing circuit and logic, that senses magnetic input frequency. The internal circuitry contains a timer so that one or two pulses at a slower repetition rate than the set point do not produce an unwanted output.
Features:

Wide Temperature Ranges for Design Flexibility

Temperature Compensated for Consistent Operation with Low-Cost Magnets

Bipolar Operation for Easy RPM Counting Using Ring Magnets

Built-In Timing Circuit Greatly Simplifies and Reduces the Cost of PC Board Design

Speed Trip Point Adjustable with External Resistor and Capacitor

Body Style	Radial Lead IC
Brand/Series	SS421H Series
Current, Output	20 mA
Current, Supply	15 mA
Current, Switching	20 mA
Function	Hall Effect Sensor
Mounting Type	PCB
Output	Voltage
Output Type	Voltage
Package Type	SIP-4
Range, Measurement	250 g
Sensing Mode	Adjustable Field
Sensor Type	Hall Effect
Supply Voltage	4.5-16 VDC
Technology	Hall Effect
Temperature, Operating, Maximum	105 °C
Temperature, Range	-40 to 105 °C
Termination	SMD
Type	Speed
Voltage Range	4.5-16 V
Voltage, Output	0.4 V
Voltage, Switching	0.4 VDC
关键词

Body Style Radial Lead IC  Honeywell Body Style Radial Lead IC  Hall Effect Sensors Body Style Radial Lead IC  Honeywell Hall Effect Sensors Body Style Radial Lead IC   Brand/Series SS421H Series  Honeywell Brand/Series SS421H Series  Hall Effect Sensors Brand/Series SS421H Series  Honeywell Hall Effect Sensors Brand/Series SS421H Series   Current, Output 20 mA  Honeywell Current, Output 20 mA  Hall Effect Sensors Current, Output 20 mA  Honeywell Hall Effect Sensors Current, Output 20 mA   Current, Supply 15 mA  Honeywell Current, Supply 15 mA  Hall Effect Sensors Current, Supply 15 mA  Honeywell Hall Effect Sensors Current, Supply 15 mA   Current, Switching 20 mA  Honeywell Current, Switching 20 mA  Hall Effect Sensors Current, Switching 20 mA  Honeywell Hall Effect Sensors Current, Switching 20 mA   Function Hall Effect Sensor  Honeywell Function Hall Effect Sensor  Hall Effect Sensors Function Hall Effect Sensor  Honeywell Hall Effect Sensors Function Hall Effect Sensor   Mounting Type PCB  Honeywell Mounting Type PCB  Hall Effect Sensors Mounting Type PCB  Honeywell Hall Effect Sensors Mounting Type PCB   Output Voltage  Honeywell Output Voltage  Hall Effect Sensors Output Voltage  Honeywell Hall Effect Sensors Output Voltage   Output Type Voltage  Honeywell Output Type Voltage  Hall Effect Sensors Output Type Voltage  Honeywell Hall Effect Sensors Output Type Voltage   Package Type SIP-4  Honeywell Package Type SIP-4  Hall Effect Sensors Package Type SIP-4  Honeywell Hall Effect Sensors Package Type SIP-4   Range, Measurement 250 g  Honeywell Range, Measurement 250 g  Hall Effect Sensors Range, Measurement 250 g  Honeywell Hall Effect Sensors Range, Measurement 250 g   Sensing Mode Adjustable Field  Honeywell Sensing Mode Adjustable Field  Hall Effect Sensors Sensing Mode Adjustable Field  Honeywell Hall Effect Sensors Sensing Mode Adjustable Field   Sensor Type Hall Effect  Honeywell Sensor Type Hall Effect  Hall Effect Sensors Sensor Type Hall Effect  Honeywell Hall Effect Sensors Sensor Type Hall Effect   Supply Voltage 4.5-16 VDC  Honeywell Supply Voltage 4.5-16 VDC  Hall Effect Sensors Supply Voltage 4.5-16 VDC  Honeywell Hall Effect Sensors Supply Voltage 4.5-16 VDC   Technology Hall Effect  Honeywell Technology Hall Effect  Hall Effect Sensors Technology Hall Effect  Honeywell Hall Effect Sensors Technology Hall Effect   Temperature, Operating, Maximum 105 °C  Honeywell Temperature, Operating, Maximum 105 °C  Hall Effect Sensors Temperature, Operating, Maximum 105 °C  Honeywell Hall Effect Sensors Temperature, Operating, Maximum 105 °C   Temperature, Range -40 to 105 °C  Honeywell Temperature, Range -40 to 105 °C  Hall Effect Sensors Temperature, Range -40 to 105 °C  Honeywell Hall Effect Sensors Temperature, Range -40 to 105 °C   Termination SMD  Honeywell Termination SMD  Hall Effect Sensors Termination SMD  Honeywell Hall Effect Sensors Termination SMD   Type Speed  Honeywell Type Speed  Hall Effect Sensors Type Speed  Honeywell Hall Effect Sensors Type Speed   Voltage Range 4.5-16 V  Honeywell Voltage Range 4.5-16 V  Hall Effect Sensors Voltage Range 4.5-16 V  Honeywell Hall Effect Sensors Voltage Range 4.5-16 V   Voltage, Output 0.4 V  Honeywell Voltage, Output 0.4 V  Hall Effect Sensors Voltage, Output 0.4 V  Honeywell Hall Effect Sensors Voltage, Output 0.4 V   Voltage, Switching 0.4 VDC  Honeywell Voltage, Switching 0.4 VDC  Hall Effect Sensors Voltage, Switching 0.4 VDC  Honeywell Hall Effect Sensors Voltage, Switching 0.4 VDC