OPB856 Optical Sensor Through-Beam Phototransistor Module

Part Overview

The OPB856 is an optical sensor designed for through-beam detection applications with a 12" (304.8mm) sensing distance. It features a phototransistor output configuration and is housed in an M12 threaded body connector module. The OPB856 is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support and new designs. The OPB856Z serves as the direct manufacturer equivalent, offering identical electrical and mechanical specifications with improved product status and compliance certifications.

Substiute Parts

OPB856

TT Electronics/Optek TechnologyIn Stock: 942OPB856 Datasheet

Current PartRFQ

OPB856Z

TT Electronics / Optek TechnologyIn Stock: 1271OPB856Z Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The OPB856Z is classified as a direct manufacturer substitute for the OPB856 based on identical alignment across all critical electrical and mechanical parameters. Substitution eligibility is determined by the following parameters:

• Sensing Distance: 12" (304.8mm)
• Sensing Method: Through-Beam
• Output Configuration: Phototransistor
• Current - DC Forward (If) (Max): 40 mA
• Voltage - Collector Emitter Breakdown (Max): 30 V
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: M12 Threaded Body, Nut
• Package / Case: Module, Connector
• Type: Unamplified

The OPB856Z maintains complete parameter parity with the OPB856, enabling direct substitution in applications requiring through-beam optical sensing with phototransistor output.

Parameter Comparison

Engineering Selection Recommendations

The OPB856Z is the appropriate selection for applications currently using or specifying the OPB856. The substitute part maintains complete electrical and mechanical compatibility while offering the following advantages:

• Active product status ensures continued availability and manufacturing support
• ROHS3 compliance meets current regulatory requirements for electronic components
• Identical electrical performance across all specified parameters
• Equivalent mechanical interface and mounting configuration

For new designs and system upgrades, the OPB856Z should be specified to ensure long-term component availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the OPB856Z be used as a direct replacement for the OPB856?

A: Yes. The OPB856Z is a direct manufacturer substitute with identical electrical and mechanical specifications. All parameters including sensing distance, output configuration, current ratings, voltage ratings, operating temperature range, and mounting type are equivalent.

Q: What is the difference between OPB856 and OPB856Z?

A: The primary differences are product status and compliance certifications. The OPB856 is obsolete and RoHS non-compliant, while the OPB856Z is an active product with ROHS3 compliance. Electrical and mechanical parameters are identical.

Q: Are there packaging differences between these parts?

A: The OPB856 is available in standard packaging, while the OPB856Z is supplied in bulk packaging. Both use the same Module, Connector package type with M12 threaded body and nut mounting.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on matching sensing distance (12"), sensing method (through-beam), output configuration (phototransistor), current rating (40 mA max), voltage rating (30 V max), operating temperature range (-40°C ~ 85°C), and mounting type (M12 threaded body, nut).

Q: Is the OPB856Z suitable for new designs?

A: Yes. The OPB856Z is an active product with current regulatory compliance and should be specified for all new designs requiring 12" through-beam optical sensing with phototransistor output.