OPB866L55 Equivalent & Substitute Parts

Part Overview

The OPB866L55 is an optical sensor manufactured by TT Electronics/Optek Technology, classified as a through-beam phototransistor optical sensor with PCB mount configuration. This component features a 0.125" (3.18mm) sensing distance and is designed for slot-type optical sensing applications. The OPB866L55 is currently listed as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. Active alternatives with identical or compatible electrical and mechanical parameters are available from the same manufacturer series.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB866L55
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	Through Hole
Package / Case	PCB Mount
Type	Unamplified
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the OPB866L55 are identified based on strict parametric 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)
REACH Status: REACH Unaffected

Substitute parts are categorized into two groups:

Manufacturer Recommended Equivalent: OPB866P55 differs only in mounting type (Chassis Mount module with pre-wired configuration) and product status (Active). All electrical parameters remain identical.

Parametric Equivalents: OPB360L11, OPB360L51, OPB360L55, OPB360T51, OPB360T55, OPB365L51, OPB365T55, OPB370L55, and OPB370T11 maintain all critical electrical and environmental parameters. These parts differ only in base product number designation and are all Active status components.

Parameter Comparison

Parameter	OPB866L55	OPB866P55	OPB360L11	OPB360L51	OPB360L55	OPB360T51	OPB360T55	OPB365L51	OPB365T55	OPB370L55	OPB370T11
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Sensing Distance	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Sensing Method	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam	Through-Beam
Output Configuration	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor	Phototransistor
Current - DC Forward (If) (Max)	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA
Current - Collector (Ic) (Max)	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA	30 mA
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Chassis Mount	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	PCB Mount	Module, Pre-Wired	PCB Mount	PCB Mount	PCB Mount	PCB Mount	PCB Mount	PCB Mount	PCB Mount	PCB Mount	PCB Mount
Type	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified	Unamplified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and environmental parameter compatibility with the OPB866L55. Selection between alternatives depends on mounting and packaging requirements:

For direct PCB mount replacement with identical form factor: OPB360L11, OPB360L51, OPB360L55, OPB360T51, OPB360T55, OPB365L51, OPB365T55, OPB370L55, and OPB370T11 are suitable. These components are all Active status and ROHS3 compliant.

For module-based integration: OPB866P55 provides a pre-wired chassis mount alternative with identical electrical specifications. This option is recommended when system design permits module-level integration rather than discrete PCB mount installation.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original OPB866L55. Product status transition from Obsolete to Active ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can OPB866P55 be used as a direct replacement for OPB866L55?

A: OPB866P55 is electrically equivalent but differs in mounting configuration. The OPB866P55 is a pre-wired module with chassis mount, while OPB866L55 is a through-hole PCB mount component. Use OPB866P55 only if your system design accommodates module-level integration.

Q: What is the difference between OPB360 series and OPB365/OPB370 series parts?

A: All listed parts maintain identical electrical parameters and sensing characteristics. Differences are limited to base product number designation. Selection among these series depends on availability and procurement requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original OPB866L55.

Q: Can I use OPB360T51 or OPB360T55 instead of OPB360L11 or OPB360L51?

A: Yes. All OPB360 variants maintain identical electrical and environmental specifications. Selection can be based on availability and inventory status.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate across -40°C to 85°C, identical to the OPB866L55.

Q: Are there any differences in current ratings between substitute parts?

A: No. All substitute parts maintain maximum DC forward current of 50 mA and maximum collector current of 30 mA.

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