SM4ETA202 Equivalent & Substitute Parts

Part Overview

The SM4ETA202 is a 2 kOhms, 0.25W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This component features a cermet resistive element, J lead termination, and side adjustment capability with 12 turns. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. Active equivalent models are available to ensure supply chain continuity.

Substiute Parts

SM4ETA202

Nidec Components CorporationIn Stock: 1015SM4ETA202 Datasheet

Current PartRFQ

SM-42TA202

Nidec Components CorporationIn Stock: 4894SM-42TA202 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SM-42TA202 qualifies as a direct substitute for the SM4ETA202 based on the following critical parameters:

• Identical resistance value: 2 kOhms
• Identical power rating: 0.25W (1/4W)
• Identical tolerance: ±10%
• Identical temperature coefficient: ±100ppm/°C
• Identical adjustment type: Side Adjustment
• Identical resistive material: Cermet
• Identical mounting type: Surface Mount
• Identical termination style: J Lead
• Identical RoHS compliance: ROHS3 Compliant
• Identical moisture sensitivity level: MSL 1 (Unlimited)

Minor variations in physical dimensions and number of turns do not affect functional equivalence for standard potentiometer applications. The SM-42TA202 is manufactured by the same supplier and maintains full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SM-42TA202 is the recommended substitute for the obsolete SM4ETA202. Both components maintain identical electrical specifications, including resistance, power rating, tolerance, and temperature coefficient. The substitute part is currently in active production status with confirmed inventory availability (4790 pcs), ensuring reliable supply chain access.

Both parts comply with ROHS3 requirements and carry MSL 1 rating, indicating no moisture sensitivity constraints during storage and handling. The minor dimensional variation and single-turn reduction in the SM-42TA202 do not impact functional performance in standard potentiometer applications where the specified electrical parameters are the primary selection criteria.

Frequently Asked Questions (FAQ)

Q: Can the SM-42TA202 directly replace the SM4ETA202 in existing designs?

A: Yes. The SM-42TA202 maintains identical electrical specifications (2 kOhms, 0.25W, ±10% tolerance, ±100ppm/°C temperature coefficient) and identical mechanical characteristics (surface mount, J lead termination, side adjustment, cermet resistive element). The one-turn reduction (11 vs. 12 turns) does not affect electrical performance.

Q: What is the significance of the different number of turns?

A: The number of turns affects adjustment resolution and mechanical feel during calibration. The SM-42TA202 provides 11 turns versus 12 turns on the SM4ETA202. This difference does not impact the final resistance value or electrical performance once the potentiometer is set to the required resistance.

Q: Are there packaging differences between these parts?

A: The SM4ETA202 packaging specification is not provided in the available data. The SM-42TA202 is supplied in Tape & Reel (TR) format. Confirm packaging requirements with your procurement specifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SM4ETA202 and SM-42TA202 are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are classified under ECCN EAR99 and HTSUS 8533.40.8050.

Q: Why is the SM4ETA202 listed as obsolete?

A: The SM4ETA202 has been discontinued by the manufacturer. The SM-42TA202 represents the active equivalent model from Nidec Components Corporation and is the recommended replacement for new designs and ongoing production.