OPB911W55 Equivalent & Substitute Parts

Part Overview

The OPB911W55 is an optical sensor module manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor operates at 0.375" (9.53mm) sensing distance with NPN open collector output configuration and wire lead packaging for chassis mount applications.

The OPB911W55 carries an obsolete product status. Locating equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring through-beam optical sensing at this specific distance and electrical specification.

Key Parameters

Parameter	Value
Sensing Distance	0.375" (9.53mm)
Sensing Method	Through-Beam
Output Configuration	NPN - Open Collector, Buffer
Voltage Supply	4.75V ~ 5.25V
Current Supply	15 mA
Response Time	70ns
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Chassis Mount
Package Type	Module, Wire Leads

Substitute Part Grouping Explanation

Substitute parts for the OPB911W55 are qualified based on electrical and mechanical parameter equivalence. The following criteria determine substitution validity:

Identical sensing distance: 0.375" (9.53mm)
Identical sensing method: Through-Beam
Identical output configuration: NPN - Open Collector, Buffer
Matching voltage supply range: 4.75V ~ 5.25V
Matching current supply: 15 mA
Matching response time: 70ns
Matching operating temperature range: -40°C ~ 85°C
Identical mounting type: Chassis Mount
Identical package type: Module, Wire Leads

Two substitute parts meet these criteria: OPB911W55Z (direct variant) and OPB901W55Z (manufacturer-recommended alternative).

Parameter Comparison

Parameter	OPB911W55	OPB911W55Z	OPB901W55Z
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Series	Photologic®	Photologic®	Photologic®
Product Status	Obsolete	Active	Active
Sensing Distance	0.375" (9.53mm)	0.375" (9.53mm)	0.375" (9.53mm)
Sensing Method	Through-Beam	Through-Beam	Through-Beam
Output Configuration	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer	NPN - Open Collector, Buffer
Voltage Supply	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Current Supply	15 mA	15 mA	15 mA
Response Time	70ns	70ns	70ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount
Package Type	Module, Wire Leads	Module, Wire Leads	Module, Wire Leads
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both OPB911W55Z and OPB901W55Z are active product variants with full electrical and mechanical equivalence to the obsolete OPB911W55. Selection between these substitutes should be based on the following factors:

OPB911W55Z is the direct variant designation and maintains the same base product number (OPB911). This part carries ROHS3 compliance and has higher inventory availability (3395 units).

OPB901W55Z is the manufacturer-recommended alternative with a different base product number (OPB901) but identical electrical specifications and performance characteristics. This part also carries ROHS3 compliance with available inventory (2456 units).

Both substitute parts are REACH Unaffected and carry identical ECCN and HTSUS classifications. Selection may be determined by supply chain availability, procurement lead times, or existing design documentation preferences.

Frequently Asked Questions (FAQ)

Q: Can OPB911W55Z and OPB901W55Z be used interchangeably with OPB911W55?

A: Yes. Both substitute parts maintain identical electrical specifications, sensing distance, output configuration, and operating parameters. The primary difference is product status: OPB911W55 is obsolete while both substitutes are active products.

Q: What is the difference between OPB911W55Z and OPB901W55Z?

A: Both parts are electrically and mechanically equivalent. The primary distinction is the base product number: OPB911 versus OPB901. Both are active products with ROHS3 compliance and identical performance characteristics across all specified parameters.

Q: Are there packaging differences between these parts?

A: All three parts use identical packaging: Module with Wire Leads for Chassis Mount applications. The "Z" suffix on the substitute parts indicates bulk packaging, whereas the original OPB911W55 had unspecified packaging designation.

Q: Do the substitute parts meet compliance requirements?

A: Both OPB911W55Z and OPB901W55Z are ROHS3 compliant and REACH Unaffected. The original OPB911W55 is RoHS non-compliant. If RoHS compliance is required for your application, either substitute part is suitable.

Q: What is the sensing distance specification?

A: All three parts operate at 0.375" (9.53mm) through-beam sensing distance. This specification is identical across OPB911W55, OPB911W55Z, and OPB901W55Z.

Q: Are the electrical specifications identical?

A: Yes. All three parts share identical voltage supply (4.75V ~ 5.25V), current supply (15 mA), response time (70ns), and operating temperature range (-40°C ~ 85°C).

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