HOA0866-N55 Equivalent & Substitute Parts

Part Overview

The HOA0866-N55 is an optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed as a through-beam transistor output device for PCB mounting applications. This component features a 0.125" (3.18mm) sensing distance and is classified as an unamplified optical sensor with transistor output configuration.

The HOA0866-N55 carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

HOA0866-N55

Honeywell Sensing and Productivity SolutionsIn Stock: 931HOA0866-N55 Datasheet

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TCST1103

Vishay Semiconductor Opto DivisionIn Stock: 2146TCST1103 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HOA0866-N55 are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Sensing Method: Through-Beam configuration
• Output Configuration: Transistor or Phototransistor output
• Sensing Distance: Nominal range 0.122" to 0.125" (3.1mm to 3.18mm)
• Mounting Type: Through Hole
• Type: Unamplified optical sensor
• Operating Temperature Range: Minimum -40°C or lower; Maximum 85°C or higher

Secondary Electrical Parameters:

• Current - DC Forward (If): Equal to or greater than 50 mA
• Current - Collector (Ic): Equal to or greater than 30 mA
• Voltage - Collector Emitter Breakdown: Equal to or greater than 30 V
• Response Time: Equal to or faster than 15µs

The TCST1103 meets these substitution criteria through equivalent sensing distance, through-beam sensing method, transistor-based output, through-hole mounting, and unamplified operation. Electrical parameters of the TCST1103 meet or exceed the requirements of the HOA0866-N55.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The HOA0866-N55 is classified as obsolete, while the TCST1103 maintains active product status. This distinction is significant for long-term supply chain planning and technical support availability.

Compliance and Certification: Both components maintain RoHS compliance. The HOA0866-N55 is RoHS Compliant, and the TCST1103 is ROHS3 Compliant, indicating both meet current environmental and hazardous substance restrictions. The TCST1103 additionally carries REACH Unaffected status.

Electrical Performance: The TCST1103 demonstrates enhanced electrical specifications across multiple parameters. Collector-Emitter breakdown voltage is 70 V compared to 30 V, providing greater voltage margin. Response time is faster at 10µs or 8µs versus 15µs. Forward current capability is 60 mA versus 50 mA.

Package and Mounting: Both components utilize through-hole mounting. The HOA0866-N55 is specified as PCB Mount, while the TCST1103 is a slotted module with 4-lead dual row configuration. Physical form factor differences require mechanical design verification for direct substitution in existing PCB layouts.

Temperature Operating Range: The TCST1103 provides an extended lower temperature limit of -55°C compared to -40°C, offering broader environmental operating capability while maintaining the same upper limit of 85°C.

Frequently Asked Questions (FAQ)

Q: Can the TCST1103 directly replace the HOA0866-N55 in existing designs?

A: The TCST1103 is functionally equivalent based on sensing distance, through-beam sensing method, transistor output configuration, and unamplified operation. However, the TCST1103 is a slotted module with 4-lead dual row package, while the HOA0866-N55 is specified as PCB mount. Physical form factor and pinout differences require mechanical and electrical design verification before direct substitution in existing PCB layouts.

Q: What are the key electrical differences between these components?

A: The TCST1103 exceeds the HOA0866-N55 specifications in three areas: Collector-Emitter breakdown voltage (70 V vs. 30 V), forward current capability (60 mA vs. 50 mA), and response time (10µs or 8µs vs. 15µs). The TCST1103 collector current maximum is 4 mA, which is lower than the HOA0866-N55 specification of 30 mA. This parameter difference requires circuit-level analysis for specific applications.

Q: Why is the HOA0866-N55 listed as obsolete?

A: The HOA0866-N55 carries obsolete product status as designated by the manufacturer. The TCST1103 is an active product from Vishay Semiconductor Opto Division, ensuring ongoing availability and technical support for new designs and production continuity.

Q: Are both components RoHS compliant?

A: Yes. The HOA0866-N55 is RoHS Compliant, and the TCST1103 is ROHS3 Compliant. Both components meet current environmental and hazardous substance restriction requirements. The TCST1103 additionally carries REACH Unaffected status.

Q: What is the sensing distance difference between these components?

A: The HOA0866-N55 has a sensing distance of 0.125" (3.18mm), while the TCST1103 has a sensing distance of 0.122" (3.1mm). This 0.003" (0.08mm) difference is negligible for most through-beam optical sensing applications and does not affect functional substitution.

Q: Does the TCST1103 operate across the same temperature range?

A: The TCST1103 operates from -55°C to 85°C, which extends the lower temperature limit by 15°C compared to the HOA0866-N55 range of -40°C to 85°C. Both components maintain the same upper operating temperature of 85°C.