OPB375P11 Equivalent & Substitute Parts

Part Overview

The OPB375P11 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This component features a 0.125" (3.18mm) sensing distance with pre-wired chassis mount packaging and unamplified phototransistor output configuration. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functional specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB375P11
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	Chassis Mount
Package / Case	Module, Pre-Wired
Type	Unamplified
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the OPB375P11 is determined by strict equivalence across the following critical parameters:

Primary Substitution 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
Type: Unamplified
RoHS Status: ROHS3 Compliant

Mounting and Packaging Considerations: The OPB375P11 uses chassis mount pre-wired module packaging. Substitute parts are grouped into two categories:

Direct Equivalents (Chassis Mount, Pre-Wired Module): Parts maintaining identical mounting type and package configuration
Functional Equivalents (Through Hole PCB Mount): Parts with identical electrical parameters but different mounting configuration (OPB375T11)

All substitute parts listed maintain identical electrical specifications and environmental compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	Vce Breakdown (Max)	Operating Temp	Mounting Type	Package / Case	Type	RoHS Status
OPB375P11	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB375T11	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
OPB360N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB365N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB365N51	TT Electronics / Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB365P55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB370N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB370N55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB375N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB380N11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant
OPB380P51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation for Obsolete Part Replacement:

OPB375N51 is the recommended direct equivalent for OPB375P11 replacement. Both parts maintain identical electrical specifications, sensing characteristics, and chassis mount pre-wired module packaging. OPB375N51 is currently in active production status with 648 units in stock, ensuring supply continuity.

Alternative Direct Equivalents:

OPB370N55 offers the highest inventory availability (90,400 units) while maintaining all electrical and mechanical specifications identical to OPB375P11. This part is suitable for applications where supply security is a primary concern.

OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB380N11Z, and OPB380P51Z are all parametrically equivalent alternatives with active product status and adequate inventory levels.

Functional Equivalent for PCB Integration:

OPB375T11 provides identical electrical performance with through-hole PCB mount configuration instead of chassis mount pre-wired module packaging. This part is suitable for applications requiring direct PCB integration rather than external module mounting.

All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with existing environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can OPB375T11 be used as a direct replacement for OPB375P11?

A: OPB375T11 is functionally equivalent in all electrical parameters but differs in mounting configuration. OPB375P11 uses chassis mount pre-wired module packaging, while OPB375T11 uses through-hole PCB mount. Substitution is possible only if the application can accommodate the different mounting method.

Q: What is the difference between the various substitute part numbers (OPB360N51, OPB365N11, OPB370N55, etc.)?

A: All listed substitute parts maintain identical electrical specifications and sensing characteristics. Differences exist only in internal design variants and manufacturing series designations. From an electrical and functional standpoint, they are interchangeable within the specified parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the compliance profile of OPB375P11.

Q: Which substitute part has the best inventory availability?

A: OPB370N55 has the highest inventory level at 90,400 units in stock, providing maximum supply security for high-volume applications.

Q: Can I use OPB375N51 as a direct replacement for OPB375P11 in existing designs?

A: Yes. OPB375N51 is a direct equivalent with identical electrical specifications, sensing distance, output configuration, and chassis mount pre-wired module packaging. No design modifications are required.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by matching sensing distance (0.125"), sensing method (through-beam), output configuration (phototransistor), current ratings (If 50 mA max, Ic 30 mA max), voltage rating (30 V Vce breakdown), operating temperature range (-40°C to 85°C), and unamplified type classification. Mounting configuration (chassis mount vs. PCB mount) affects physical integration but not electrical compatibility.

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