OPB881P51Z

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Sensing Distance:	0.125" (3.18mm)
Sensing Method:	Transmissive
Output Configuration:	Phototransistor
Current - DC Forward (If) (Max):	50mA
Current - Collector (Ic) (Max):	30mA
Voltage - Collector Emitter Breakdown (Max):	30V
Response Time:	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Chassis Mount
Package / Case:	Module, Pre-Wired
Type:	Unamplified

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OPB881P51Z Application Field and Working Principle

Optical sensors, more commonly known as photointerrupters, are widely used in industrial automation for controlling and detecting motion. OPB881P51Z is a type of slot photointerrupter with transistor output. This article introduces the application field and working principle of OPB881P51Z.Application FieldOPB881P51Z is mainly used in the industries such as automotive, medical, industrial, and consumer electronics. In automotive applications, it is used for sensor input on door locks, automatic transmission shifters, throttle position sensors, brake light switch control, and cruise control systems. In industrial settings, it is used for optical sensors, level control, pressure switch, flow switch and motor speed detections. In the medical field it has been used for applications such as urine collection devices and some glass sensors. In consumer electronics, it is mostly used for optical switches, Touch ID and USB detectors.Working PrincipleThe OPB881P51Z Photointerrupter works on a transistor-based light-to-power switching technology. It consists of a transmitter and a receiver. The transmitter emits light, which is then received by the receiver. If the beam of light is interrupted due to the presence of an object in the space between transmitter and receiver, the interrupt triggers a signal to the transistor output. This signal can then be used for controlling any device, depending on the circuit configuration.The OPB881P51Z Photointerrupter operates on 12~18V DC voltage, or 6 to 16V AC power supply voltage. It has a forward voltage of 1.2V max and a collector dark current of 0.5mA max. The maximum on/off time-delay of the device is 0.2ms when operated on AC and 0.6ms when operated on DC. The device also has a high level light receive current of 15mA.ConclusionThe OPB881P51Z Photointerrupter is a slot-type transistor output type optical sensor, widely used for motion control and detection in industries such automotive, medical, industrial, and consumer electronics. It works on a transistor-based light-to-power switching technology, where light is sent and received and when the beam is interrupted, a signal is sent to the transistor output, which can then be used for controlling any device. The device operates on 12~18V DC voltage, or 6 to 16V AC power supply voltage, and has a forward voltage of 1.2V max, collector dark current of 0.5mA max, and maximum on/off time-delay of 0.2ms when operated on AC and 0.6ms when operated on DC.

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