Vishay Spectrol 28A11B10 Dial Scale - Equivalent & Substitute Parts

Part Overview

The Vishay Spectrol 28A11B10 is a 21-turn concentric dial scale with a 0.250" (6.35mm) shaft size and metal scale construction. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing maintenance, repair, and legacy system support. The part is ROHS3 compliant and carries an MSL rating of 1 (Unlimited).

Substiute Parts

28A11B10

Vishay SpectrolIn Stock: 82928A11B10 Datasheet

Current PartRFQ

2606

TT Electronics/BIIn Stock: 12432606 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 28A11B10 is determined by the following critical parameters:

• Shaft Size: 0.250" (6.35mm) — mechanical interface requirement
• Number of Turns: 21 turns — functional resolution specification
• Scale Construction: Metal or plastic scale dial — material composition
• RoHS Compliance: ROHS3 or equivalent regulatory status

The TT Electronics/BI 2606 qualifies as a substitute based on matching shaft size (0.250" / 6.35mm) and similar turn count (20 turns versus 21 turns). The primary difference is the scale material (plastic versus metal) and turn count variance of one turn. Both parts share identical ECCN and HTSUS classifications, confirming regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: The 28A11B10 is obsolete; the 2606 is active production. Both parts maintain identical regulatory compliance (ROHS3/RoHS, EAR99, HTSUS 8533.90.8000) and MSL ratings.

Mechanical Compatibility: Both parts feature 0.250" (6.35mm) shaft sizing, ensuring direct mechanical interface compatibility with existing assemblies.

Functional Variance: The 2606 provides 20 turns versus the original 21 turns. This one-turn difference represents a 4.8% reduction in resolution. Applications requiring exact 21-turn resolution must evaluate whether 20-turn operation is functionally acceptable within system tolerances.

Material Difference: The 28A11B10 uses metal scale construction; the 2606 uses plastic scale construction. Material selection impacts durability, environmental resistance, and aesthetic properties. Assess application environment for compatibility.

Availability: The 2606 is in active production with higher inventory levels (1134 pcs versus 731 pcs), supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 2606 directly replace the 28A11B10 in existing assemblies?

A: Mechanical compatibility is confirmed through matching 0.250" (6.35mm) shaft sizing. Functional compatibility depends on application tolerance for the one-turn difference (20 versus 21 turns) and acceptance of plastic scale material versus metal scale construction.

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

A: The 28A11B10 provides 21 turns; the 2606 provides 20 turns. This represents a 4.8% reduction in dial resolution. Applications with strict resolution requirements must evaluate whether this variance is acceptable within system specifications.

Q: Are both parts RoHS compliant?

A: Yes. The 28A11B10 is ROHS3 compliant; the 2606 is RoHS compliant. Both meet current regulatory requirements. The 2606 also carries REACH Unaffected status.

Q: What packaging differences exist between these parts?

A: The 28A11B10 is supplied in bulk packaging; the 2606 is supplied in box packaging. Packaging selection may impact handling, storage, and integration into assembly workflows.

Q: Why is the 28A11B10 classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The 2606, as an active production part, provides continuity for new designs and ongoing system support.

Q: Are there regulatory or export restrictions on either part?

A: Both parts carry ECCN classification EAR99 and HTSUS code 8533.90.8000, indicating no additional export restrictions beyond standard commercial controls.