OPB375T55 Equivalent & Substitute Parts

Part Overview

The OPB375T55 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 requiring 0.125" (3.18mm) sensing distance. The part maintains Active product status and is RoHS3 compliant with REACH unaffected classification. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, ensuring functional interchangeability within the defined parameter constraints.

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 OPB375T55 are qualified based on strict parameter equivalence across the following 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
Mounting Type: Through Hole
Package / Case: PCB Mount
Type: Unamplified
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical performance specifications and environmental operating conditions. Substitution is valid when all parameters match the main part without deviation.

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Operating Temperature	Mounting Type	Package	Type	RoHS Status	Inventory
OPB375T55	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	ROHS3 Compliant	794 Pcs
OPB360L11	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	ROHS3 Compliant	742 Pcs
OPB360T51	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	ROHS3 Compliant	2007 Pcs
OPB360T55	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	ROHS3 Compliant	769 Pcs
OPB365T55	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	ROHS3 Compliant	4496 Pcs
OPB370T51	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	ROHS3 Compliant	909 Pcs
OPB370T55	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	ROHS3 Compliant	1112 Pcs
OPB380L51Z	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	ROHS3 Compliant	1085 Pcs
OPB380T11Z	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	ROHS3 Compliant	1111 Pcs
OPB380T51Z	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	ROHS3 Compliant	2503 Pcs
OPB380T55Z	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	ROHS3 Compliant	1036 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and full RoHS3 compliance with REACH unaffected classification, matching the regulatory and environmental requirements of the OPB375T55. Selection among equivalent parts should be based on inventory availability and application-specific lead time requirements. The OPB365T55 variant offers the highest current inventory level at 4496 units, while OPB380T51Z provides substantial availability at 2503 units. All parts are qualified for identical electrical performance within the specified operating temperature range of -40°C to 85°C and maintain equivalent moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the OPB375T55?

A: Substitution is valid when all electrical parameters match exactly: 50 mA maximum DC forward current, 30 mA maximum collector current, 30 V collector-emitter breakdown voltage, and identical sensing distance of 0.125" (3.18mm). The part must also maintain through-beam sensing method, phototransistor output configuration, through-hole mounting, PCB mount package, and unamplified type classification.

Q: Are all substitute parts from the same manufacturer?

A: Yes, all substitute parts are manufactured by TT Electronics / Optek Technology, ensuring consistent design standards and quality control across the product family.

Q: Do substitute parts have the same operating temperature range?

A: All substitute parts operate within the identical temperature range of -40°C to 85°C, maintaining thermal performance equivalence with the OPB375T55.

Q: What is the significance of the part number suffix variations (L11, T51, T55, L51Z, T11Z, T51Z, T55Z)?

A: Suffix variations indicate different internal configurations or manufacturing revisions within the OPB series. Despite these designations, all listed parts maintain identical electrical specifications and are functionally equivalent for through-beam optical sensing applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed carry ROHS3 Compliant status with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the OPB375T55.

Q: Can I use these parts interchangeably in existing designs?

A: Parts are electrically and mechanically interchangeable when all specified parameters align. PCB mount configuration and through-hole mounting type are consistent across all listed parts, supporting direct substitution in existing circuit board layouts.

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