OPB375T11 Equivalent & Substitute Parts

Part Overview

The OPB375T11 is an optical sensor manufactured by TT Electronics/Optek Technology, classified as a through-beam phototransistor optical sensor with PCB mount packaging. This component is designed for slot-based optical sensing applications requiring 0.125" (3.18mm) sensing distance. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from equivalent alternatives within the same electrical and mechanical parameter range.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB375T11
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	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the OPB375T11 are qualified based on strict electrical and mechanical parameter equivalence. All substitute parts must maintain identical specifications 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
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All identified substitute parts meet these criteria and are manufactured by TT Electronics/Optek Technology. Substitution is valid across all listed alternatives without circuit redesign or application modification.

Parameter Comparison

Part Number	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Operating Temperature	Mounting Type	Package	Type	RoHS Status	MSL	Inventory (Pcs)
OPB375T11	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	708
OPB360T51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	2007
OPB365T55	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	4496
OPB370L55	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	909
OPB370T51	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	909
OPB370T55	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1112
OPB380T11Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1111
OPB380T51Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	2503
OPB380T55Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1036
OPB390L11Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1137
OPB390L51Z	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3	1	1025

Engineering Selection Recommendations

All substitute parts listed are manufactured by TT Electronics/Optek Technology and maintain active product status. Each substitute part carries ROHS3 compliance and REACH Unaffected status, meeting the same regulatory requirements as the OPB375T11. Selection among substitute parts may be based on inventory availability and lead time considerations. OPB365T55 offers the highest inventory level at 4496 pieces. OPB380T51Z provides 2503 pieces with extended availability. All parts are functionally equivalent for through-beam optical sensing applications requiring 0.125" (3.18mm) sensing distance with phototransistor output configuration.

Frequently Asked Questions (FAQ)

Q: Can OPB360T51, OPB365T55, and OPB370 series parts be used interchangeably with OPB375T11?

A: Yes. All substitute parts maintain identical electrical specifications (50 mA forward current, 30 mA collector current, 30 V breakdown voltage), identical sensing distance (0.125" / 3.18mm), identical sensing method (through-beam), identical output configuration (phototransistor), identical operating temperature range (-40°C to 85°C), and identical mounting characteristics (through-hole PCB mount). Substitution requires no circuit modification.

Q: What is the difference between OPB380T11Z, OPB380T51Z, and OPB380T55Z?

A: These three parts share the same base product number (OPB380) and differ only in suffix designation. All three maintain identical electrical and mechanical parameters specified for the OPB375T11 substitution group. Suffix variations do not affect functional compatibility within this application.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and REACH Unaffected status, matching the regulatory compliance of the OPB375T11.

Q: Which substitute part has the best availability?

A: OPB365T55 maintains the highest inventory level at 4496 pieces. OPB380T51Z provides 2503 pieces as a secondary option for extended availability.

Q: Does the MSL rating affect substitution?

A: No. All substitute parts carry MSL 1 (Unlimited) rating, identical to the OPB375T11. This indicates no moisture sensitivity restrictions for storage or handling.

Q: Can I use OPB370L55 or OPB390L11Z in place of OPB375T11?

A: Yes. Both parts maintain all required electrical and mechanical parameters. The "L" designation in the part number does not affect functional equivalence within the specified parameter range.

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