OPB827B Equivalent & Substitute Parts

Part Overview

The OPB827B is an optical sensor manufactured by TT Electronics/Optek Technology, designed as a through-beam phototransistor with PCB mount configuration. This component operates with a 0.125" (3.18mm) sensing distance and is classified as an unamplified optical sensor. The OPB827B is currently listed as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Value
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)

Substitute Part Grouping Explanation

Substitute parts for the OPB827B are qualified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain constant:

Sensing distance: 0.125" (3.18mm)
Sensing method: Through-Beam
Output configuration: Phototransistor
Current ratings: If (Max) 50 mA, Ic (Max) 30 mA
Voltage rating: Collector Emitter Breakdown 30 V
Operating temperature range: -40°C ~ 85°C
Mounting type: Through Hole
Package type: PCB Mount
Sensor type: Unamplified

All substitute parts listed maintain these exact specifications. The primary distinction among substitutes is product status (Active vs. Obsolete) and packaging configuration (Bulk). Parts are grouped by their base product number (OPB360, OPB365, OPB370) with variant suffixes indicating packaging and lead configuration options.

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 / Case	Type	RoHS Status	Inventory
OPB827B	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 Compliant	632 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 Compliant	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 Compliant	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 Compliant	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 Compliant	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 Compliant	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 Compliant	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 Compliant	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 Compliant	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 Compliant	909 Pcs
OPB370T51	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 Compliant	909 Pcs

Engineering Selection Recommendations

All listed substitute parts are manufactured by TT Electronics/Optek Technology and maintain full parametric equivalence to the OPB827B across electrical ratings, sensing characteristics, and mechanical specifications. The primary advantage of these substitutes is their Active product status, ensuring continued availability and supply chain reliability compared to the obsolete OPB827B.

All substitute parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory compliance profile of the original part. Inventory availability varies across part numbers, with OPB365T55 offering the highest stock level at 4496 units.

The OPB360 series (OPB360L11, OPB360L51, OPB360L55, OPB360T51, OPB360T55) and OPB365 series (OPB365L51, OPB365T55) provide direct electrical and mechanical substitution. The OPB370 series (OPB370L55, OPB370T11, OPB370T51) offers equivalent functionality with identical performance parameters.

Frequently Asked Questions (FAQ)

Q: Can OPB360 series parts directly replace the OPB827B? A: Yes. OPB360L11, OPB360L51, OPB360L55, OPB360T51, and OPB360T55 maintain identical electrical specifications, sensing distance, output configuration, and mounting type. All are Active status components suitable for direct substitution.

Q: What is the difference between OPB360L and OPB360T variants? A: The suffix designations (L vs. T) indicate packaging and lead configuration options within the OPB360 base product family. Both variants maintain identical electrical and sensing parameters required for OPB827B substitution.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status, matching the regulatory compliance of the OPB827B.

Q: Which substitute part has the highest inventory availability? A: OPB365T55 offers the highest stock level at 4496 units, followed by OPB360T51 at 2007 units.

Q: Do substitute parts maintain the same operating temperature range? A: Yes. All substitute parts operate across the identical temperature range of -40°C to 85°C as the OPB827B.

Q: Are there any electrical rating differences between substitute options? A: No. All substitute parts maintain identical maximum ratings: If (Max) 50 mA, Ic (Max) 30 mA, and Vce Breakdown (Max) 30 V.

Q: What is the sensing distance specification for all parts? A: All parts, including the OPB827B and all substitutes, operate with a 0.125" (3.18mm) through-beam sensing distance.

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