H-492-3 Equivalent & Substitute Parts

Part Overview

The H-492-3 is a counting dial with brake mechanism manufactured by Bourns Inc., featuring a 0.250" (6.35mm) shaft size and 30-turn metal scale dial. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this dial specification is required.

Substiute Parts

H-492-3

Bourns Inc.In Stock: 1082H-492-3 Datasheet

Current PartRFQ

2694

TT Electronics/BIIn Stock: 9172694 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the H-492-3 counting dial is determined by the following critical parameters:

• Shaft Size Compatibility: The substitute must accommodate mechanical coupling to systems designed for 0.250" (6.35mm) shaft diameter
• Turn Count Functionality: The number of turns defines the resolution and range of the dial mechanism
• Scale Material: Metal versus plastic scale construction affects durability and environmental performance
• Product Status: Active status indicates current availability and ongoing manufacturer support
• Regulatory Compliance: RoHS and REACH certifications determine suitability for regulated applications

The identified substitute part 2694 from TT Electronics/BI represents an alternative counting dial mechanism, though with differing mechanical specifications that require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

H-492-3 Selection: Applicable for legacy system maintenance where original specifications must be preserved. Obsolete status requires confirmation of inventory availability prior to procurement.

2694 Selection: Suitable for new designs or system upgrades where RoHS compliance is required. Active product status ensures ongoing manufacturer support and availability. Mechanical differences in shaft size (0.236" versus 0.250") and turn count (10 versus 30) require mechanical interface verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can the 2694 directly replace the H-492-3 in existing assemblies?

A: Direct mechanical replacement requires verification of shaft diameter tolerance and coupling compatibility. The 0.250" (6.35mm) H-492-3 shaft differs from the 0.236" (6.00mm) 2694 shaft, necessitating mechanical interface assessment.

Q: What is the significance of the turn count difference between these parts?

A: The H-492-3 provides 30-turn resolution while the 2694 provides 10-turn resolution. This affects the dial's measurement range and precision. Application requirements determine whether this difference is acceptable.

Q: Does the scale material difference impact performance?

A: The H-492-3 uses metal scale construction while the 2694 uses plastic scale construction. Material selection affects durability, environmental resistance, and operational lifespan based on application conditions.

Q: Why is RoHS compliance relevant for this substitution?

A: RoHS compliance status determines regulatory acceptability in specific markets and applications. The H-492-3 is RoHS non-compliant while the 2694 is RoHS compliant, affecting suitability for regulated industries.

Q: What does the obsolete status of the H-492-3 mean for procurement?

A: Obsolete status indicates the manufacturer has discontinued production. Availability is limited to existing inventory. The 2694 active status ensures continued availability from the manufacturer.