OPB375P55 Equivalent & Substitute Parts

Part Overview

The OPB375P55 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 identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB375P55
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

Substitution for the OPB375P55 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
Type: Unamplified
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

Substitute parts are categorized into two groups: MFR Recommended substitutes (active status, direct replacement consideration) and Parametric Equivalents (active status, matching all electrical and environmental specifications). Mounting type variations (chassis mount module pre-wired versus through-hole PCB mount) are noted as design integration considerations.

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	Inventory
OPB375P55	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	1152 Pcs
OPB375T55	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	794 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	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	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	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	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	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	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	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	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	651 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain active product status with ROHS3 compliance and REACH unaffected certification, matching the regulatory requirements of the obsolete OPB375P55. Selection between parametric equivalents should prioritize inventory availability and mechanical integration requirements.

OPB375T55 represents the MFR recommended substitute but requires design modification due to through-hole PCB mount configuration versus the original chassis mount pre-wired module. This substitution is appropriate for new designs with PCB-based integration.

For direct mechanical and electrical replacement without design modification, parametric equivalent options include OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, and OPB380P51Z. All maintain identical electrical specifications and chassis mount module pre-wired packaging. OPB370N55 offers the highest inventory availability at 90,400 units.

Frequently Asked Questions (FAQ)

Q: Can OPB375T55 be used as a direct replacement for OPB375P55?

A: OPB375T55 is electrically and functionally equivalent but requires design modification. The original part uses chassis mount pre-wired module packaging, while OPB375T55 uses through-hole PCB mount configuration. Integration into existing mechanical assemblies designed for pre-wired modules is not possible without redesign.

Q: What is the difference between the parametric equivalent parts?

A: All parametric equivalents (OPB360N51, OPB365N11, OPB365N51, OPB365P55, OPB370N51, OPB370N55, OPB375N51, OPB380N11Z, OPB380P51Z) share identical electrical specifications, sensing distance, operating temperature range, and chassis mount pre-wired packaging. Differences exist only in base product series designation and internal design variants. Selection should be based on inventory availability and supplier lead time.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory certification of the original OPB375P55.

Q: Which substitute part has the best inventory availability?

A: OPB370N55 offers the highest inventory level at 90,400 units in stock, providing optimal procurement lead time and supply chain stability.

Q: Can I use these parts interchangeably in my existing assembly?

A: Parametric equivalent parts with chassis mount pre-wired module packaging (all except OPB375T55) are mechanically and electrically interchangeable with OPB375P55. OPB375T55 requires mechanical redesign due to different mounting configuration.

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