OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.

Hallogic Hall-effect Sensor Assembly

OHB3040, OHB3040B & OHB3040S

OPTEK Technology Inc. —

1645 Wallace Drive, Carrollton, Texas 75006

Phone: (972) 323-2200 or (800) 341-4747

FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com

Issue B

03/2014

Page 1 of 3

Features:

Hallogic silicon chip

Description:

The OHB3040 consists of a ceramic Hall-effect sensor (OMH3040) and a rare earth magnet mounted in a low-cost

plastic housing. The magnet produces optimum magnetic flux at the Hall-effect sensor location. The sensor has

an open collector transistor output, which is activated when the slot is open. When the slot is blocked by a ferrous

material that reduces the magnetic flux density at the Hall-effect sensor location, the open collector output

transistor switches off. The device provides up to 25 mA of sink current. Output characteristics are constant at

switching frequencies from DC to over 200 kHz. The OHB3040B has Hi-Reliability processing level B while the

OHB3040S has Hi-Reliability processing level S.

The Uni-Polar turns on with a (logic level “0”) after a sufficient magnetic field from the south pole of a magnet

approaches the symbolized face of the device (Operating Point) and turns off (logic level “1”) after the magnetic

field reached a minimum value. This feature makes these sensors ideal for applications in non-contact switching

operations.

Product Photo Here

Hall

Element

Voltage

Regulator

2

3

1Vcc

Output

Ground

Pin #

Description

1

Vcc

2

Ground

3

Output

Applications:

DIMENSIONS ARE IN:

INCHES

[MILLIMETERS]

Ordering Information

Part Number

Description

OHB3040

OHB3040B

OHB3040S

Slotted Switch

RoHS