OPB963P55 Equivalent & Substitute Parts

Part Overview

The OPB963P55 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 OPB963P55 is classified as obsolete; however, multiple active equivalent parts are available from the same manufacturer that maintain identical electrical and mechanical specifications, ensuring direct functional replacement in existing designs.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the OPB963P55 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must remain identical for functional interchangeability:

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

All substitute parts listed maintain these specifications without deviation. The primary distinction between substitute options is product status (active vs. obsolete) and packaging format (bulk vs. tape/reel). These variations do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Sensing Distance	Output Configuration	Voltage - Supply	Current - Supply	Response Time	Operating Temperature	Inventory (Pcs)
OPB963P55	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	986
OPB963N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	926
OPB963N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	2795
OPB963P51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	997
OPB963T11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	661
OPB963T51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	1011
OPB963T55	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	1444
OPB973L51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	695
OPB973N11	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	1238
OPB973N51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	6130
OPB973T51	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	NPN - Open Collector, Inverted	4.75V ~ 5.25V	15 mA	70ns	-40°C ~ 70°C	918

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the OPB963P55. Selection among active equivalents should prioritize parts with active product status to ensure long-term supply chain stability and manufacturer support. The OPB963N51 and OPB973N51 variants offer the highest inventory levels (2795 and 6130 units respectively), providing supply security for production requirements.

All substitute parts are ROHS3 compliant and REACH unaffected, maintaining the same regulatory compliance profile as the original OPB963P55. Packaging format differences (bulk, tape/reel designations) do not affect functional performance and are determined by procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can OPB963P55 be directly replaced with OPB963N11 or OPB963T55?

A: Yes. Both parts maintain identical electrical specifications (4.75V ~ 5.25V supply, 15 mA current, 70ns response time), mechanical mounting (through hole PCB mount), sensing characteristics (0.125" through-beam), and output configuration (NPN open collector inverted). The primary difference is product status; OPB963N11 and OPB963T55 are active parts.

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

A: Both series maintain identical electrical and mechanical parameters specified for this application. The distinction is in the base product number designation; however, all listed OPB973 variants are functionally equivalent to OPB963 variants when comparing identical suffix codes.

Q: Does packaging format affect compatibility?

A: No. Packaging format (bulk, tape/reel) affects only procurement and assembly handling. All substitute parts listed maintain identical PCB mount through-hole mechanical specifications and electrical performance regardless of packaging designation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and REACH unaffected status, matching the regulatory profile of the OPB963P55.

Q: Which substitute part offers the best supply availability?

A: OPB973N51 maintains the highest inventory level at 6130 units, followed by OPB963N51 at 2795 units. Both are active parts suitable for new designs and production requirements.

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