OPB875P55 Equivalent & Substitute Parts

Part Overview

The OPB875P55 is an optical sensor through-beam phototransistor module manufactured by TT Electronics/Optek Technology. This chassis-mounted, pre-wired sensor operates with a 0.125" (3.18mm) sensing distance and unamplified phototransistor output configuration. The part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring compatible optical sensing functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB875P55
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Equivalent substitutes for the OPB875P55 are determined by strict parametric matching across the following critical specifications:

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
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed below match these parameters exactly and are manufactured by TT Electronics/Optek Technology. The primary distinction between substitutes is product status, with all listed alternatives currently in active production status, ensuring long-term availability and supply chain continuity.

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	MSL	REACH Status	Inventory
OPB875P55	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	1 (Unlimited)	REACH Unaffected	1029 Pcs
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	1 (Unlimited)	REACH Unaffected	1394 Pcs
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	1 (Unlimited)	REACH Unaffected	658 Pcs
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	1 (Unlimited)	REACH Unaffected	1916 Pcs
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	1 (Unlimited)	REACH Unaffected	1052 Pcs
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	1 (Unlimited)	REACH Unaffected	1250 Pcs
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	1 (Unlimited)	REACH Unaffected	90400 Pcs
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	1 (Unlimited)	REACH Unaffected	648 Pcs
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	1 (Unlimited)	REACH Unaffected	1100 Pcs
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	1 (Unlimited)	REACH Unaffected	651 Pcs
OPB380P55Z	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	1 (Unlimited)	REACH Unaffected	3121 Pcs

Engineering Selection Recommendations

All listed substitute parts are manufactured by TT Electronics/Optek Technology and maintain full parametric equivalence to the OPB875P55. Each substitute is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component deployment.

The primary advantage of substitution is product status: all alternatives are in active production, ensuring reliable supply chain access and long-term availability. The OPB370N55 variant offers the highest inventory level at 90,400 units, providing maximum supply security for high-volume applications. The OPB380P55Z provides 3,121 units with equivalent specifications and active status.

Selection among substitutes should be based on packaging requirements and internal connector specifications denoted by the part number suffix, as all electrical and thermal parameters remain identical across the substitute group.

Frequently Asked Questions (FAQ)

Q: Can OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, OPB380P51Z, and OPB380P55Z be used as direct replacements for OPB875P55?

A: Yes. All listed parts are parametric equivalents with identical electrical ratings, sensing distance, output configuration, operating temperature range, and mounting specifications. The parts differ only in internal connector type and packaging designation, which are denoted by the part number suffix.

Q: Why is the OPB875P55 listed as obsolete?

A: The OPB875P55 has been discontinued by the manufacturer. Equivalent active-status alternatives are available with identical performance specifications and full regulatory compliance.

Q: What is the difference between the various OPB substitute part numbers?

A: The differences are in internal connector type and packaging configuration, indicated by the alphanumeric suffix. All parts maintain identical electrical performance, sensing distance, current ratings, voltage ratings, and operating temperature specifications.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Which substitute offers the best supply availability?

A: OPB370N55 provides the highest inventory level at 90,400 units, followed by OPB380P55Z at 3,121 units. Both are active-status parts with identical electrical specifications to the OPB875P55.

Q: Do the substitutes maintain the same moisture sensitivity level?

A: Yes. All substitutes maintain MSL 1 (Unlimited) rating, identical to the original OPB875P55.

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