OPB835L55 Equivalent & Substitute Parts

Part Overview

The OPB835L55 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 currently listed as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB835L55
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	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the OPB835L55 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching 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

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the OPB835L55. Substitutes are categorized as either manufacturer-recommended (active product status) or parametric equivalents (matching all functional parameters).

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	Type	RoHS
OPB835L55	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3
OPB835L11	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
OPB360L11	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
OPB360L51	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
OPB360L55	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
OPB360T51	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
OPB360T55	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
OPB365L51	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
OPB365T55	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
OPB370L55	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
OPB370T11	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

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the OPB835L55. Selection should prioritize parts with active product status to ensure long-term availability and supply chain stability.

Primary Recommendation: OPB835L11 is the manufacturer-recommended substitute, offering identical electrical specifications and active product status from TT Electronics/Optek Technology.

Alternative Selections: OPB360 series (OPB360L11, OPB360L51, OPB360L55, OPB360T51, OPB360T55), OPB365 series (OPB365L51, OPB365T55), and OPB370 series (OPB370L55, OPB370T11) are parametric equivalents with active status. All substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can OPB835L11 be used as a direct replacement for OPB835L55?

A: Yes. OPB835L11 is the manufacturer-recommended substitute with identical electrical parameters (50 mA If max, 30 mA Ic max, 30 V Vce breakdown max), identical sensing distance (0.125"), identical sensing method (through-beam), and identical mounting configuration (PCB mount, through hole). The primary difference is product status: OPB835L11 is active while OPB835L55 is obsolete.

Q: What is the difference between OPB360, OPB365, and OPB370 series parts?

A: All three series share identical electrical specifications and sensing parameters with the OPB835L55. The series designation reflects internal design variations within the TT Electronics/Optek Technology product line. All maintain the same 0.125" sensing distance, phototransistor output, and PCB mount configuration.

Q: Are there packaging differences between substitute parts?

A: All listed substitute parts use identical PCB mount packaging and through-hole mounting type. Packaging format is listed as bulk for all active substitutes.

Q: Do all substitute parts meet the same regulatory requirements?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the OPB835L55.

Q: What parameters must remain constant when selecting a substitute?

A: Critical parameters that must match are: sensing distance (0.125"), sensing method (through-beam), output configuration (phototransistor), current ratings (50 mA If max, 30 mA Ic max), voltage rating (30 V Vce breakdown max), operating temperature range (-40°C to 85°C), mounting type (through hole), and package type (PCB mount).

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