OPB963N55 Equivalent & Substitute Parts

Part Overview

The OPB963N55 is a through-beam optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This component is designed for PCB-mounted applications with a 0.125" (3.18mm) sensing distance and NPN open collector inverted output configuration. The OPB963N55 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives within the OPB963 and OPB973 product families provide direct functional equivalence while maintaining current manufacturing status and supply availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB963N55
Manufacturer	TT Electronics/Optek Technology
Category	Optical Sensors
Series	Photologic®
Product Status	Obsolete
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	NPN - Open Collector, Inverted
Mounting Type	Through Hole
Current - Supply	15 mA
Voltage - Supply	4.75V ~ 5.25V
Response Time	70ns
Operating Temperature	-40°C ~ 70°C
Package / Case	PCB Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the OPB963N55 is determined by strict equivalence across the following critical parameters:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: NPN - Open Collector, Inverted
Mounting Type: Through Hole
Current - Supply: 15 mA
Voltage - Supply: 4.75V ~ 5.25V
Response Time: 70ns
Operating Temperature: -40°C ~ 70°C
Package / Case: PCB Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical and mechanical specifications across these parameters. Substitutes are grouped into two product families: the OPB963 base series (OPB963N11, OPB963N51, OPB963P51, OPB963T11, OPB963T51, OPB963T55) and the OPB973 base series (OPB973L51, OPB973N11, OPB973N51, OPB973T51). The primary distinction between substitutes is product status (active versus obsolete) and packaging configuration (bulk).

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Sensing Method	Output Configuration	Mounting Type	Current - Supply	Voltage - Supply	Response Time	Operating Temperature	Package / Case	RoHS Status	MSL	REACH Status	Inventory (Pcs)
OPB963N55	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	913
OPB963N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	926
OPB963N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	2795
OPB963P51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	997
OPB963T11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	661
OPB963T51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	1011
OPB963T55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	1444
OPB973L51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	695
OPB973N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	1238
OPB973N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	6130
OPB973T51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	NPN - Open Collector, Inverted	Through Hole	15 mA	4.75V ~ 5.25V	70ns	-40°C ~ 70°C	PCB Mount	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	918

Engineering Selection Recommendations

For applications currently using the obsolete OPB963N55, selection of an active substitute part is necessary to ensure long-term supply continuity and compliance with current manufacturing standards. All listed substitute parts maintain identical electrical performance and environmental compliance specifications.

Within the OPB963 family, OPB963N51 offers the highest inventory availability (2795 units) and represents the primary recommended substitute. OPB963T55 provides an alternative with substantial stock (1444 units). Both parts are active products with ROHS3 compliance and REACH unaffected status.

Within the OPB973 family, OPB973N51 provides the largest inventory reserve (6130 units) and is suitable for applications where the OPB973 base series is acceptable. OPB973N11 and OPB973T51 offer additional alternatives with active product status.

All substitutes maintain identical compliance certifications (ROHS3 Compliant, REACH Unaffected, MSL 1) and are suitable for direct replacement in PCB-mounted through-hole applications requiring 0.125" sensing distance with NPN open collector inverted output.

Frequently Asked Questions (FAQ)

Q: Can OPB963N55 be directly replaced with OPB963N51?

A: Yes. Both parts share identical electrical specifications (15 mA supply current, 4.75V ~ 5.25V supply voltage, 70ns response time), mechanical configuration (through-hole PCB mount, 0.125" sensing distance), output type (NPN open collector inverted), and compliance status (ROHS3 compliant, REACH unaffected). The primary difference is product status: OPB963N55 is obsolete while OPB963N51 is active.

Q: What is the difference between OPB963 and OPB973 series substitutes?

A: Both OPB963 and OPB973 series parts listed maintain identical electrical and mechanical parameters required for substitution. The distinction is the base product family designation. Selection between families should be based on application requirements and supply availability. OPB973N51 offers the highest inventory availability across all substitutes.

Q: Are packaging differences between substitute parts significant?

A: All substitute parts are specified with bulk packaging and PCB mount configuration. The OPB963N55 original part does not specify packaging detail in the provided data. All substitutes maintain the same through-hole PCB mount mechanical interface, ensuring compatibility with existing PCB layouts.

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

A: Yes. All substitute parts listed are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level). Compliance certifications are identical across all substitutes and the original OPB963N55.

Q: What is the recommended substitute if supply of a specific part becomes constrained?

A: OPB973N51 maintains the highest inventory level (6130 units) and provides the most robust supply position. OPB963N51 (2795 units) and OPB963T55 (1444 units) offer secondary alternatives within the OPB963 family with substantial availability.

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