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© 2015 Littelfuse

Revised: 11/02/15

Specifications are subject to change without notice.

55100 Miniature Flange Mounting Proximity Sensor

Description

The 55100 is a miniature flange mounting hall effect sensor 25.5mm (1.004”) x

11.00m (0.433”) and only 3.00mm (0.118”) high with a choice of digital or

programmable analogue outputs. It is available as three-wire (voltage output) or

two-wire (current output) versions. It’s case design enables screw or adhesive

mounting and capable of switching up to 28Vdc and 20mA. It comes with a

range of sensitivity, cable length and connector options.

Hall Effect Sensors

Features

• Magnetically operated position

sensor

• Digital or programmable analog

types available

• Medium, high or programmable

sensitivities

• Three-wire (voltage output) or two-

wire (current output) versions

• Open Drain Output

• Reverse/Over voltage protection

• Built in temperature compensation

• Vibration 50g max. @ 50-2,000Hz

• Shock 150g max. @ 11ms ½ Sine

Benefits

• High switching speed up to 10kHz

• Long life - up to 20 billion

operations

• Unaffected by harsh environments

• Operates in static or dynamic

magnetic field

• Customer selection of cable length

and connector type

Applications

• Position and limit sensing

• RPM measurement

• Flow metering

• Commutaion of brushless dc motors

• Angle sensing

• Magnetic encoders

Dimensions

Dimensions in mm (inch)

Block Diagram

Flange Mount > 55100

Notes:

1. Add capcitor Cn as shown, close to the sensor , for transient suppression if required.

2. Add pull-up resistor Rpu as shown for sinking output. The Rpu value should be calculated

using your supply voltage while keeping the ON state current at a level below the

maximum. Rpu = VDD/Io;

Rpu = 12Vdc/10mA = 1.2kOhm

VDD

Pin 1

(Red)

Hall

Plate

Clock

Comparator

Cn

GND

Pin 2

(Black)

Switch

Current

Source

Two-wire Version

VDD

Pin 1

(Red)

Hall

Plate

Clock

Comparator

Cn

Rpu

VDD

OUT

Pin 3

(Blue)

GND

Pin 2

(Black)

Switch

Output

Three-wire Version

1.50

(.059)

(2.00)

3.30x4.20 TYP.

SLOT (.130X.165)

300

(11.81)

6.35 NOM.

(.250)

3.00

(.118)

11.00

(.433)

Excluding encapsulant

Note: Two-wire version illustrated.

25.50

(1.004)

16.60

(.654)

7.50

(.295)

Center of Sensitivity