OPB891L55Z Equivalent & Substitute Parts

Part Overview

The OPB891L55Z is an optical sensor manufactured by TT Electronics/Optek Technology, classified as a through-beam phototransistor optical sensor with PCB mount configuration. This component features a 0.125" (3.18mm) sensing distance and is designed for slot-type optical sensing applications. The OPB891L55Z is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Active alternatives within the OPB series provide direct functional replacement with maintained electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	OPB891L55Z
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	PCB Mount
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 OPB891L55Z are determined by strict equivalence across the following critical parameters:

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: PCB Mount
Type: Unamplified
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical performance characteristics and environmental ratings. Substitutes are grouped by product status, with active parts recommended for new designs and obsolete parts noted for legacy system support.

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
OPB891L55Z	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	873 Pcs
OPB891T55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	1309 Pcs
OPB890L11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	3656 Pcs
OPB890T11Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	1277 Pcs
OPB890T51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	768 Pcs
OPB890T55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	1452 Pcs
OPB891T51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	1420 Pcs
OPB892L51Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	1109 Pcs
OPB892T55Z	TT Electronics/Optek Technology	Active	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	741 Pcs
OPB890L55Z	TT Electronics/Optek Technology	Obsolete	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	ROHS3 Compliant	858 Pcs

Engineering Selection Recommendations

For new designs and production applications, OPB891T55Z is the primary recommended substitute, as it maintains active product status with identical electrical and mechanical specifications to the OPB891L55Z. This part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

For applications requiring alternative base product numbers within the OPB series, OPB890T11Z, OPB890T55Z, OPB891T51Z, OPB892L51Z, and OPB892T55Z all provide equivalent parametric performance. All active substitutes are manufactured by TT Electronics/Optek Technology and maintain the same sensing distance, output configuration, current ratings, voltage ratings, and operating temperature range.

OPB890L55Z is listed as obsolete and should be considered only for legacy system maintenance where inventory is available. All substitute parts are ROHS3 compliant and REACH unaffected, ensuring compliance with environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can OPB891T55Z directly replace OPB891L55Z in existing designs?

A: Yes. OPB891T55Z maintains identical electrical specifications including 50 mA maximum DC forward current, 30 mA maximum collector current, 30 V collector-emitter breakdown voltage, and -40°C to 85°C operating temperature range. Both parts feature through-beam phototransistor output, 0.125" (3.18mm) sensing distance, and PCB mount configuration. OPB891T55Z is active product status, whereas OPB891L55Z is obsolete.

Q: What is the difference between OPB891 and OPB890 series parts?

A: Both OPB891 and OPB890 series parts listed as substitutes maintain identical electrical and mechanical parameters specified for this application. Differences exist only in base product number designation. All substitute parts deliver equivalent performance across sensing distance, output configuration, current ratings, voltage ratings, and operating temperature.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for component selection.

Q: What packaging options are available for substitute parts?

A: OPB891T55Z, OPB890L11Z, OPB890T11Z, OPB890T51Z, OPB890T55Z, OPB891T51Z, OPB892L51Z, and OPB892T55Z are supplied in bulk packaging. OPB890L55Z is supplied with unspecified packaging. All parts maintain PCB mount configuration and chassis mount type.

Q: Can I use OPB892 series parts as substitutes?

A: Yes. OPB892L51Z and OPB892T55Z maintain identical electrical specifications and operating parameters as OPB891L55Z. Both are active product status with ROHS3 compliance and REACH unaffected status.

Q: What inventory levels are available for substitute parts?

A: OPB890L11Z offers the highest inventory at 3656 pieces. OPB891T55Z provides 1309 pieces. OPB890T55Z, OPB891T51Z, and OPB892L51Z each provide over 1000 pieces in stock. All substitute parts maintain new original condition.

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