OPB827A Equivalent & Substitute Parts

Part Overview

The OPB827A 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-type optical sensing applications requiring 0.125" (3.18mm) sensing distance. The part maintains Active product status and is ROHS3 compliant with REACH unaffected classification. Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, ensuring functional interchangeability in circuit designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB827A
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the OPB827A are qualified based on strict parameter equivalence 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: 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 maintain identical electrical ratings and mechanical specifications. Substitution is valid when these parameters match completely across the main part and candidate substitute.

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	VCE Breakdown (Max)	Operating Temperature	Mounting Type	Package	Type	RoHS Status	MSL	Inventory
OPB827A	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	930 Pcs
OPB360T51	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	2007 Pcs
OPB365T55	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	4496 Pcs
OPB370L55	TT Electronics / Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	909 Pcs
OPB370T51	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	909 Pcs
OPB370T55	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	1112 Pcs
OPB380T11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	1111 Pcs
OPB380T51Z	TT Electronics / Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	2503 Pcs
OPB380T55Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	1036 Pcs
OPB390L11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	1137 Pcs
OPB390L51Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	ROHS3 Compliant	1 (Unlimited)	1025 Pcs

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and full ROHS3 compliance with REACH unaffected classification, matching the regulatory and environmental requirements of the OPB827A. Selection among equivalent parts should be based on inventory availability and lead time requirements. OPB365T55 offers the highest inventory level at 4496 units, followed by OPB380T51Z at 2503 units. OPB360T51 provides 2007 units in stock. All remaining substitutes maintain inventory levels between 909 and 1137 units. Electrical and mechanical specifications are identical across all qualified substitutes, ensuring direct functional interchangeability in through-beam optical sensing applications requiring 0.125" sensing distance with phototransistor output configuration.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the OPB827A?

A: Substitute parts must match all critical electrical and mechanical parameters: 0.125" (3.18mm) sensing distance, through-beam sensing method, phototransistor output configuration, 50 mA maximum forward current, 30 mA maximum collector current, 30 V maximum collector-emitter breakdown voltage, -40°C to 85°C operating temperature range, through-hole mounting type, PCB mount package, unamplified type classification, ROHS3 compliance, and MSL 1 rating.

Q: Are all substitute parts from the same manufacturer?

A: Yes, all substitute parts are manufactured by TT Electronics/Optek Technology, the same manufacturer as the OPB827A.

Q: Can I use these substitutes interchangeably in my circuit?

A: Yes, all identified substitute parts are parametrically equivalent to the OPB827A across all provided electrical and mechanical specifications. Direct substitution is valid for through-beam optical sensing applications.

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

A: The part numbers reflect different product variants within the OPB series (OPB360, OPB365, OPB370, OPB380, OPB390). Despite these designations, all qualified substitutes maintain identical electrical ratings and mechanical specifications as specified in this reference.

Q: Which substitute part has the best availability?

A: OPB365T55 offers the highest inventory level at 4496 units in stock, followed by OPB380T51Z at 2503 units and OPB360T51 at 2007 units.

Q: Are there any compliance or certification differences between the OPB827A and its substitutes?

A: No, all parts maintain identical ROHS3 compliance status, REACH unaffected classification, and MSL 1 (Unlimited) moisture sensitivity rating.

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