SM4ETA104 Equivalent & Substitute Parts

Part Overview

The SM4ETA104 is a 100 kOhms, 0.25W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features J Lead termination and 12-turn side adjustment capability. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. Active equivalent models maintain functional compatibility while offering improved availability.

Substiute Parts

SM4ETA104

Nidec Components CorporationIn Stock: 1028SM4ETA104 Datasheet

Current PartRFQ

SM-42TA104

Nidec Components CorporationIn Stock: 13402SM-42TA104 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM4ETA104 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 kOhms (exact match required)
• Power rating: 0.25W, 1/4W (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Adjustment type: Side Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: J Lead (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)
• Moisture sensitivity level: 1 (Unlimited) (exact match required)

The SM-42TA104 qualifies as a direct substitute based on full alignment with these parameters. Minor variations in turn count (11 vs. 12 turns) and physical dimensions (4.80mm x 4.60mm vs. 4.90mm x 4.50mm) remain within acceptable mechanical tolerances for surface mount applications. The substitute part is manufactured by the same supplier and maintains identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SM-42TA104 is the qualified substitute for the obsolete SM4ETA104. Both components are manufactured by Nidec Components Corporation and maintain identical electrical performance specifications. The substitute part carries Active product status, ensuring continued availability and supply chain reliability.

Both parts satisfy ROHS3 compliance requirements and carry identical moisture sensitivity ratings. The SM-42TA104 is available in Tape & Reel packaging, which supports automated assembly processes. The minor reduction in turn count (11 vs. 12 turns) and dimensional variation remain within acceptable tolerances for surface mount trimmer potentiometer applications where the primary function is resistance adjustment.

Selection of the SM-42TA104 eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the SM-42TA104 be used as a direct replacement for the SM4ETA104?

A: Yes. Both components share identical electrical specifications: 100 kOhms resistance, 0.25W power rating, ±10% tolerance, and ±100ppm/°C temperature coefficient. Both use cermet resistive material, J Lead termination, and side adjustment. The SM-42TA104 is the manufacturer-designated substitute for the obsolete SM4ETA104.

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

A: The SM4ETA104 features 12 turns while the SM-42TA104 features 11 turns. This difference does not affect electrical performance or resistance value. Both provide adequate resolution for trimmer potentiometer adjustment applications.

Q: Are there packaging differences between these parts?

A: Yes. The SM4ETA104 is supplied in bulk packaging, while the SM-42TA104 is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated surface mount assembly processes.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both the SM4ETA104 and SM-42TA104 are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. The SM4ETA104 measures 0.193" x 0.177" (4.90mm x 4.50mm), while the SM-42TA104 measures 0.189" x 0.181" (4.80mm x 4.60mm). These differences are within acceptable tolerances for surface mount applications and do not affect PCB layout compatibility.