OPB862P51 Equivalent & Substitute Parts

Part Overview

The OPB862P51 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This component features a 0.125" (3.18mm) sensing distance with pre-wired chassis mount packaging and unamplified phototransistor output configuration. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB862P51
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	Phototransistor
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	30 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Chassis Mount
Package / Case	Module, Pre-Wired
Type	Unamplified
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the OPB862P51 is determined by strict equivalence across the following critical parameters:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: Phototransistor
Current - DC Forward (If) (Max): 50 mA
Current - Collector (Ic) (Max): 30 mA
Voltage - Collector Emitter Breakdown (Max): 30 V
Operating Temperature: -40°C ~ 85°C
Type: Unamplified
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

MFR Recommended Substitute: OPB862T51 differs only in mounting type (Through Hole PCB Mount vs. Chassis Mount pre-wired) and product status (Active vs. Obsolete). This part maintains all electrical and environmental specifications.

Parametric Equivalents: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z maintain identical electrical characteristics, sensing distance, sensing method, output configuration, operating temperature range, and compliance certifications. All are active products with chassis mount pre-wired packaging.

Parameter Comparison

Part Number	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Operating Temperature	Mounting Type	Package / Case	Type	Product Status	RoHS Status
OPB862P51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Obsolete	ROHS3 Compliant
OPB862T51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active	ROHS3 Compliant
OPB360N51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB365N11	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB365N51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB365P55	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB370N51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB370N55	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB375N51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB380N11Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant
OPB380P51Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the obsolete OPB862P51, direct substitution is available through active product alternatives that maintain identical electrical and environmental specifications.

For Chassis Mount Pre-Wired Applications: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are functionally equivalent with active product status and full ROHS3 compliance. These parts preserve the original mounting configuration and pre-wired module design.

For PCB Mount Applications: OPB862T51 provides electrical equivalence with active product status but requires PCB mount integration instead of chassis mount. This option is suitable for designs where PCB mounting is acceptable.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing supply chain and manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can OPB862T51 directly replace OPB862P51 in existing assemblies?

A: OPB862T51 maintains all electrical specifications but differs in mounting type. OPB862P51 uses chassis mount pre-wired configuration, while OPB862T51 requires through-hole PCB mount integration. Physical integration changes are required.

Q: What is the difference between the parametric equivalent parts?

A: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are distinguished by their base product numbers (OPB360, OPB365, OPB370, OPB375, OPB380) and packaging variants. All maintain identical electrical characteristics, sensing distance, sensing method, output configuration, operating temperature range, and compliance certifications as the OPB862P51.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original OPB862P51 specifications.

Q: Why is OPB862P51 marked as obsolete?

A: The OPB862P51 is obsolete, but multiple active equivalent products with identical electrical and environmental specifications are available from TT Electronics/Optek Technology, ensuring continued design support and component availability.

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

A: Substitution is determined by equivalence in sensing distance (0.125"), sensing method (through-beam), output configuration (phototransistor), maximum currents (If 50 mA, Ic 30 mA), voltage rating (30 V), operating temperature range (-40°C to 85°C), and compliance certifications (ROHS3, MSL 1).

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