OPB390T55 Equivalent & Substitute Parts

Part Overview

The OPB390T55 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 designated as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The sensor operates with a 0.125" (3.18mm) sensing distance and is designed for applications requiring unamplified optical detection in through-beam configurations.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB390T55
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
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the OPB390T55 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
Mounting Type: Through Hole
Package / Case: PCB Mount
Type: Unamplified

All identified substitute parts maintain identical electrical and mechanical specifications across these parameters. The primary distinction between the main part and substitutes is product status and RoHS compliance. The OPB390T55Z represents a direct manufacturer equivalent with active product status and RoHS3 compliance. The OPB360 and OPB365 series parts provide parametric equivalents with identical functional characteristics.

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 Status	Inventory
OPB390T55	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	RoHS non-compliant	1122 Pcs
OPB390T55Z	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	1601 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

Engineering Selection Recommendations

The OPB390T55Z is the primary direct substitute, offering identical electrical and mechanical specifications with active product status and ROHS3 compliance. This part is recommended for new designs and ongoing procurement where RoHS compliance is required.

The OPB360 series (OPB360L11, OPB360L51, OPB360L55, OPB360T51, OPB360T55) and OPB365 series (OPB365L51, OPB365T55) provide parametric equivalents with all critical electrical and mechanical parameters matching the OPB390T55. These parts are active products with ROHS3 compliance and represent viable alternatives where the specific base product number is not a design constraint.

The OPB370 series (OPB370L55, OPB370T11) similarly maintains full parametric equivalence and active product status with ROHS3 compliance.

All substitute parts listed maintain identical sensing distance, sensing method, output configuration, current ratings, voltage ratings, operating temperature range, mounting type, package configuration, and sensor type. Selection among these alternatives may be based on inventory availability and procurement lead times.

Frequently Asked Questions (FAQ)

Q: Can OPB390T55Z be used as a direct replacement for OPB390T55?

A: Yes. The OPB390T55Z maintains identical electrical and mechanical specifications. The primary differences are active product status and ROHS3 compliance versus the obsolete, RoHS non-compliant status of the original part.

Q: What distinguishes the OPB360 and OPB365 series from the OPB390T55?

A: The OPB360 and OPB365 series are parametric equivalents with identical sensing distance, sensing method, output configuration, current ratings, voltage ratings, operating temperature range, mounting type, package configuration, and sensor type. The base product number differs, but all critical electrical and mechanical parameters are equivalent.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original OPB390T55 is RoHS non-compliant. If RoHS compliance is required for your application, any of the listed substitutes are suitable.

Q: Do all substitute parts use the same PCB mount configuration?

A: Yes. All substitute parts use through-hole mounting with PCB mount package configuration, maintaining mechanical compatibility with the original OPB390T55.

Q: What is the sensing distance specification for all these parts?

A: All parts, including the OPB390T55 and all substitutes, operate with a 0.125" (3.18mm) sensing distance in through-beam configuration.

Q: Are there differences in current or voltage ratings among the substitute parts?

A: No. All substitute parts maintain identical maximum DC forward current (50 mA), collector current (30 mA), and collector-emitter breakdown voltage (30 V) specifications.

Q: Which substitute part has the highest inventory availability?

A: OPB365T55 has the highest inventory with 4496 pieces in stock, followed by OPB360T51 with 2007 pieces.

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