OPB866N55 Equivalent & Substitute Parts

Part Overview

The OPB866N55 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 through-beam detection method and phototransistor output configuration. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain identical electrical and mechanical parameters to ensure direct functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB866N55
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

Substitute parts for the OPB866N55 are qualified based on strict parametric equivalence across the following critical criteria:

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 identified substitute parts maintain identical electrical performance specifications and environmental compliance certifications. The primary distinction between the main part and substitutes is product status: OPB866N55 is obsolete, while all substitute parts are active and available in production quantities.

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	Inventory
OPB866N55	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	718 Pcs
OPB866P55	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	1014 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	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	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	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	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	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	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	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	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	651 Pcs

Engineering Selection Recommendations

All listed substitute parts are active production components manufactured by TT Electronics/Optek Technology with identical electrical specifications and environmental compliance certifications to the obsolete OPB866N55. Each substitute maintains ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating.

OPB866P55 represents the direct packaging variant substitute, differing only in packaging designation (Bulk versus standard). OPB370N55 offers the highest inventory availability at 90,400 units, supporting high-volume production requirements. OPB365N51 provides 1,916 units in stock, suitable for medium-volume applications. All remaining substitutes maintain active status with inventory levels between 648 and 1,394 units.

Selection among equivalent parts should be based on packaging requirements, inventory availability, and lead time considerations. All substitutes deliver identical functional performance within the specified electrical and thermal operating parameters.

Frequently Asked Questions (FAQ)

Q: Can OPB866P55 directly replace OPB866N55 in existing designs?

A: Yes. OPB866P55 maintains identical electrical specifications, sensing distance, output configuration, and environmental compliance. The difference is packaging designation only.

Q: What distinguishes the OPB360, OPB365, OPB370, and OPB380 series from OPB866?

A: All parts share identical electrical parameters, sensing distance, sensing method, output configuration, operating temperature range, and compliance certifications. The series designation reflects internal design variants within the through-beam phototransistor module family.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original OPB866N55 environmental certifications.

Q: Which substitute offers the best availability?

A: OPB370N55 provides the highest inventory level at 90,400 units in stock, followed by OPB365N51 with 1,916 units.

Q: Do substitute parts require circuit design modifications?

A: No. All substitutes maintain identical electrical ratings: 50 mA maximum DC forward current, 30 mA maximum collector current, and 30 V maximum collector-emitter breakdown voltage. No circuit modifications are required.

Q: What is the operating temperature range for all substitutes?

A: All substitute parts operate across -40°C to 85°C, identical to the original OPB866N55.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message