HOA0891-T55 Equivalent & Substitute Parts

Part Overview

The HOA0891-T55 is an optical sensor manufactured by Honeywell Sensing and Productivity Solutions, classified as a through-beam transistor module with 0.125" (3.18mm) sensing distance. This component features pre-wired configuration and chassis mount installation. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring this sensor category.

Key Parameters

Parameter	Value
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	Transistor
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	30 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Response Time	15µs
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Chassis Mount
Package Type	Module, Pre-Wired
Type	Unamplified
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the HOA0891-T55 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Primary Matching Criteria:

Sensing distance: 0.125" (3.18mm)
Sensing method: Through-beam
Output type: Transistor or phototransistor configuration
Maximum collector current (Ic): 30 mA
Maximum forward current (If): 50 mA
Collector-emitter breakdown voltage: 30 V
Mounting type: Chassis mount
Package configuration: Module, pre-wired or PCB mount

Substitute Parts Identified:

OPB891T55Z (TT Electronics/Optek Technology) - Active product status
OPB829CZ (TT Electronics/Optek Technology) - Active product status

Both substitutes maintain electrical parameter compatibility and are currently in active production, providing long-term availability advantages over the obsolete HOA0891-T55.

Parameter Comparison

Parameter	HOA0891-T55	OPB891T55Z	OPB829CZ
Manufacturer	Honeywell Sensing and Productivity Solutions	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Product Status	Obsolete	Active	Active
Sensing Distance	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Sensing Method	Through-Beam	Through-Beam	Through-Beam
Output Configuration	Transistor	Phototransistor	Phototransistor
Current - DC Forward (If) (Max)	50 mA	50 mA	50 mA
Current - Collector (Ic) (Max)	30 mA	30 mA	30 mA
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	30 V
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 80°C
Mounting Type	Chassis Mount, Wire Lead	Chassis Mount	Chassis Mount
Package / Case	Module, Pre-Wired	PCB Mount	Module, Pre-Wired
Type	Unamplified	Unamplified	Unamplified
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

OPB891T55Z Selection Criteria:

Identical operating temperature range (-40°C ~ 85°C) to HOA0891-T55
Active product status ensures long-term availability and supply chain stability
ROHS3 compliance exceeds original RoHS compliance requirement
PCB mount configuration requires circuit board integration versus pre-wired installation
Suitable for new designs prioritizing modern manufacturing standards

OPB829CZ Selection Criteria:

Maintains pre-wired module configuration matching HOA0891-T55 installation method
Active product status provides supply continuity
ROHS3 compliance meets current regulatory requirements
Operating temperature range of -40°C ~ 80°C covers most industrial applications, with 5°C reduction from original specification
Optimal for direct replacement in existing assemblies requiring minimal mechanical redesign

Both substitutes maintain electrical parameter equivalence and are manufactured by the same supplier (TT Electronics/Optek Technology), ensuring consistent quality and performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can OPB891T55Z directly replace HOA0891-T55 in existing assemblies?

A: OPB891T55Z maintains electrical parameter compatibility but features PCB mount configuration versus the pre-wired installation of HOA0891-T55. Circuit board integration is required. Mechanical redesign of mounting interfaces may be necessary.

Q: Is OPB829CZ a direct mechanical and electrical substitute?

A: OPB829CZ provides both electrical and mechanical compatibility. The pre-wired module configuration matches HOA0891-T55 installation requirements. Operating temperature range is -40°C ~ 80°C versus -40°C ~ 85°C; verify application requirements do not exceed 80°C maximum.

Q: What is the difference between transistor and phototransistor output configurations?

A: Both OPB891T55Z and OPB829CZ use phototransistor output, while HOA0891-T55 specifies transistor output. Both configurations operate within identical electrical parameters (30 mA maximum collector current, 30 V breakdown voltage) and are functionally equivalent for through-beam sensing applications.

Q: Are response time specifications available for substitute parts?

A: Response time data is not provided for OPB891T55Z or OPB829CZ in available documentation. HOA0891-T55 specifies 15µs response time. Consult manufacturer datasheets for complete response time specifications if this parameter is critical to application performance.

Q: Do substitute parts meet current regulatory compliance standards?

A: Both OPB891T55Z and OPB829CZ carry ROHS3 compliance certification, exceeding the RoHS compliance of the obsolete HOA0891-T55. Both parts are classified as EAR99 and HTSUS 8541.49.8000, maintaining export and tariff classification consistency.

Q: What inventory status should influence part selection?

A: OPB891T55Z inventory: 1309 Pcs. OPB829CZ inventory: 1185 Pcs. Both substitutes maintain substantial stock levels. HOA0891-T55 obsolete status eliminates future availability. Select based on mechanical compatibility requirements rather than inventory considerations.

Q: Are moisture sensitivity levels equivalent across all three parts?

A: All three parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage, handling, or installation.

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