H-550-6A-1 Equivalent & Substitute Parts

Part Overview

The H-550-6A-1 is a scale dial with brake mechanism manufactured by Bourns Inc., featuring a 0.250" (6.35mm) shaft size and 10-turn configuration with metallized plastic construction. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain supply chain continuity for applications requiring compatible dial mechanisms with identical mechanical interfaces.

Substiute Parts

H-550-6A-1

Bourns Inc.In Stock: 1024H-550-6A-1 Datasheet

Current PartRFQ

H-46-6A

Bourns Inc.In Stock: 1321H-46-6A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the H-550-6A-1 is determined by the following critical parameters:

• Shaft Size: 0.250" (6.35mm) — mechanical interface requirement
• Manufacturer: Bourns Inc. — ensures design compatibility within product family
• RoHS Compliance: ROHS3 Compliant — regulatory requirement
• Moisture Sensitivity Level: 1 (Unlimited) — environmental tolerance
• REACH Status: REACH Unaffected — regulatory alignment

The H-46-6A qualifies as a direct substitute based on matching shaft size, manufacturer, and regulatory compliance. While the H-46-6A features a 20-turn configuration compared to the 10-turn H-550-6A-1, both components share identical mechanical mounting interfaces and environmental specifications, enabling functional substitution in applications where turn count adjustment is permissible.

Parameter Comparison

Engineering Selection Recommendations

The H-46-6A is the designated substitute for the obsolete H-550-6A-1. Both components maintain identical shaft size (0.250" / 6.35mm) and regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification). The H-46-6A is currently in active production status with confirmed inventory availability, ensuring supply chain reliability.

The primary design difference is the turn count specification: the H-46-6A provides 20-turn resolution compared to the H-550-6A-1's 10-turn configuration. Additionally, the H-46-6A features metal scale dial construction versus the metallized plastic of the original part. These differences do not affect mechanical compatibility at the shaft interface but may impact application-specific performance characteristics related to resolution and durability.

Frequently Asked Questions (FAQ)

Q: Can the H-46-6A directly replace the H-550-6A-1 in existing assemblies?

A: Yes, mechanical compatibility is confirmed. Both components share the 0.250" (6.35mm) shaft size and identical mounting interface. The H-46-6A is actively manufactured and maintains full regulatory compliance (ROHS3, REACH Unaffected).

Q: What is the significance of the 10-turn versus 20-turn difference?

A: The H-46-6A provides twice the rotational resolution. Applications requiring the original 10-turn specification may need design review to accommodate the increased turn count, but the mechanical interface remains compatible.

Q: Are there packaging differences between these parts?

A: The H-550-6A-1 packaging specification was not provided in the input data. The H-46-6A is supplied in Box packaging. Verify packaging requirements with your procurement specification.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both components are ROHS3 Compliant, REACH Unaffected, classified as EAR99, and share identical Moisture Sensitivity Level 1 (Unlimited) ratings. HTSUS classification is identical (8533.90.8000).

Q: Why is the H-550-6A-1 obsolete?

A: Product status reflects manufacturer discontinuation. The H-46-6A represents the active equivalent within the Bourns dial component family and is the recommended replacement for new designs and supply continuity.