OPB876L55 Equivalent & Substitute Parts

Part Overview

The OPB876L55 is an optical sensor manufactured by TT Electronics / Optek Technology, classified as a through-beam phototransistor optical sensor with PCB mount configuration. This component is designed for slot-type optical sensing applications with a 0.125" (3.18mm) sensing distance and unamplified phototransistor output.

The OPB876L55 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this sensor.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB876L55
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 OPB876L55 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
Mounting Type: Through Hole
Package / Case: PCB Mount
Type: Unamplified
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All identified substitute parts maintain identical electrical and mechanical specifications across these parameters. The primary distinction between the OPB876L55 and its substitutes is product status: the OPB876L55 is obsolete, while all substitute parts listed below carry active product status and are currently available in inventory.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	Vce Breakdown (Max)	Operating Temperature	Mounting Type	Package	Type	RoHS	MSL	Inventory
OPB876L55	TT Electronics / Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1078 Pcs
OPB876T55	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1118 Pcs
OPB360L11	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	742 Pcs
OPB360L51	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	688 Pcs
OPB360L55	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1118 Pcs
OPB360T51	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	2007 Pcs
OPB360T55	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	769 Pcs
OPB365L51	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1132 Pcs
OPB365T55	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	4496 Pcs
OPB370L55	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	909 Pcs
OPB370T11	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	909 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain full parametric equivalence to the OPB876L55 across electrical and mechanical specifications. The primary selection criterion is product status: all substitutes carry active product status with current manufacturing and inventory availability, whereas the OPB876L55 is obsolete.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original part. Moisture sensitivity level remains at MSL 1 (Unlimited) across all alternatives, indicating no special moisture handling requirements during storage or assembly.

Selection among the available substitutes may be based on inventory availability and packaging preferences. OPB365T55 offers the highest inventory level at 4496 pieces. OPB360T51 provides 2007 pieces in stock. All other alternatives maintain inventory levels between 688 and 1132 pieces.

Frequently Asked Questions (FAQ)

Q: Can OPB876L55 be directly replaced with OPB876T55?

A: Yes. OPB876T55 is the manufacturer-recommended substitute. Both parts share identical electrical and mechanical parameters. The primary difference is product status: OPB876L55 is obsolete while OPB876T55 is active with current availability.

Q: What distinguishes the OPB360 series from the OPB365 and OPB370 series?

A: All three series (OPB360, OPB365, OPB370) maintain identical electrical specifications and sensing characteristics as specified in the parameter comparison table. Differences exist only in part numbering designations assigned by the manufacturer. All are parametrically equivalent to OPB876L55.

Q: Are there any differences in PCB mount configuration between substitute parts?

A: No. All substitute parts utilize identical through-hole PCB mount configuration. Physical mounting compatibility is maintained across all alternatives.

Q: Do all substitutes meet the same compliance requirements?

A: Yes. All substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original OPB876L55 specifications.

Q: Which substitute offers the best inventory availability?

A: OPB365T55 provides the highest current inventory at 4496 pieces. OPB360T51 offers 2007 pieces. Both represent strong availability options for immediate procurement.

Q: Are there any electrical parameter differences between substitutes?

A: No. All substitute parts maintain identical maximum ratings: 50 mA DC forward current, 30 mA collector current, and 30 V collector-emitter breakdown voltage. Operating temperature range remains -40°C to 85°C across all alternatives.

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