H22A3 Equivalent & Substitute Parts

Part Overview

The H22A3 is an optical sensor manufactured by onsemi, designed as a through-beam phototransistor with slotted configuration and PC pins. This component operates with a sensing distance of 0.118" (3mm) and is classified as an unamplified optical sensor. The product status is obsolete, making identification of equivalent parts essential for system maintenance, redesign, and procurement planning.

Substiute Parts

H22A3

onsemiIn Stock: 6631H22A3 Datasheet

Current PartRFQ

H22A3

onsemiIn Stock: 6631H22A3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the H22A3 optical sensor is determined by strict alignment of the following critical parameters:

• Sensing distance: 0.118" (3mm) through-beam configuration
• Output type: Phototransistor (unamplified)
• Collector current rating: 5.5 mA maximum
• Forward current rating: 60 mA maximum
• Breakdown voltage: 30 V minimum
• Response time characteristics: 8µs and 50µs specifications
• Operating temperature range: -55°C to 100°C
• Mounting configuration: Through hole with flange
• Package type: Slotted with PC pins

Only components matching all these parameters across sensing method, electrical ratings, thermal performance, and mechanical form factor qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The H22A3 is classified as obsolete. When sourcing this component, direct part number matching with onsemi H22A3 is the primary selection criterion. The substitute identified maintains identical electrical specifications, thermal operating range, and mechanical packaging. Compliance certifications including REACH Unaffected status and EAR99 ECCN classification are consistent across the substitute relationship.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the H22A3 optical sensor?

A: A valid substitute must match the H22A3 across all specified parameters: 0.118" (3mm) through-beam sensing distance, phototransistor output, 5.5 mA maximum collector current, 60 mA maximum forward current, 30 V breakdown voltage, 8µs and 50µs response times, -55°C to 100°C operating temperature, through-hole flange mounting, and slotted PC pin packaging.

Q: Why is the H22A3 marked as obsolete?

A: Product status reflects manufacturer discontinuation. Obsolete designation indicates the component is no longer in active production, requiring alternative sourcing strategies or design migration planning.

Q: Are there compatibility concerns with the substitute part?

A: The identified substitute maintains complete electrical and mechanical compatibility with the original H22A3 specification. Pin configuration, mounting footprint, and performance characteristics are identical.

Q: What is the significance of the slotted PC pin package?

A: The slotted configuration with PC pins defines the mechanical interface for through-hole mounting on printed circuit boards. This package type is integral to the component's form factor and must be preserved in any substitution.

Q: How do response time specifications affect sensor selection?

A: The H22A3 specifies dual response times of 8µs and 50µs. These values define the sensor's switching speed characteristics and must be matched in any equivalent component to ensure system timing requirements are met.