OPB862N51 Equivalent & Substitute Parts

Part Overview

The OPB862N51 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	OPB862N51
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 OPB862N51 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

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

Substitute Categories:

MFR Recommended: OPB862T51 represents the manufacturer-recommended upgrade path, offering identical electrical and thermal specifications with active product status and PCB mount configuration as an alternative to chassis mount.

Parametric Equivalents: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z all maintain complete parameter equivalence across sensing distance, sensing method, output configuration, current ratings, voltage ratings, operating temperature range, and compliance certifications. These parts differ only in base product series designation and packaging variants (bulk packaging with chassis mount or pre-wired module configurations).

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	Vce Breakdown (Max)	Operating Temp	Mounting Type	Package / Case	Type	Product Status	RoHS Status
OPB862N51	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics / Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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	TT Electronics/Optek Technology	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 OPB862N51, the following selection criteria apply:

Primary Recommendation: OPB862T51 is the manufacturer-recommended substitute, offering identical electrical specifications and active product status. This part is suitable for new designs and ongoing production where PCB mount configuration is acceptable as an alternative to chassis mount.

Active Parametric Equivalents: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z are all active products with complete parameter equivalence to the OPB862N51. These parts maintain identical electrical performance, thermal operating range, and compliance certifications. Selection among these equivalents depends on packaging variant availability and inventory requirements.

All substitute parts listed 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 OPB862N51 in existing designs?

A: OPB862T51 provides complete electrical and thermal equivalence. The primary difference is mounting configuration: OPB862T51 uses through-hole PCB mount versus OPB862N51's chassis mount. Design compatibility depends on whether the application can accommodate PCB mount installation.

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

A: OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z differ only in base product series designation and packaging variants. All maintain identical sensing distance, sensing method, output configuration, current ratings, voltage ratings, and operating temperature specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the OPB862N51.

Q: Which substitute part has the highest inventory availability?

A: OPB370N55 has the highest inventory level at 90,400 pieces in stock, followed by OPB365N51 at 1,916 pieces.

Q: Can I use OPB862N51 substitutes interchangeably in the same application?

A: Yes, provided the mounting configuration is compatible with your design. All listed substitutes maintain identical electrical specifications, thermal operating range, and sensing performance characteristics.

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