SM4ETA504 Equivalent & Substitute Parts

Part Overview

The SM4ETA504 is a 500 kOhms, 0.25W surface mount trimmer potentiometer with J Lead termination, manufactured by Nidec Components Corporation. This component features a 12-turn cermet resistive element with side adjustment capability and is designed for precision tuning applications in compact form factors.

The SM4ETA504 has reached obsolete product status. Identifying qualified substitute components ensures design continuity and maintains supply chain reliability for applications requiring this specific resistance value and power rating.

Substiute Parts

SM4ETA504

Nidec Components CorporationIn Stock: 808SM4ETA504 Datasheet

Current PartRFQ

SM-42TA504

Nidec Components CorporationIn Stock: 1476SM-42TA504 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SM4ETA504 is determined by strict equivalence across the following critical parameters:

• Resistance value: 500 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 (minimum requirement)
• MSL rating: 1 or better (minimum requirement)

The SM-42TA504 meets all substitution criteria. Minor variations in turn count (11 vs. 12 turns) and physical dimensions remain within acceptable tolerance ranges for equivalent functional performance in tuning applications.

Parameter Comparison

Engineering Selection Recommendations

The SM-42TA504 is the qualified substitute for the obsolete SM4ETA504. Both components are manufactured by Nidec Components Corporation and maintain identical electrical specifications across resistance, power rating, tolerance, and temperature coefficient parameters.

The SM-42TA504 carries active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance and MSL Level 1 ratings, meeting environmental and moisture sensitivity requirements.

The SM-42TA504 is available in Tape & Reel packaging with 1416 units in stock, providing immediate procurement capability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can the SM-42TA504 directly replace the SM4ETA504 in existing designs?

A: Yes. Both components share identical electrical specifications (500 kOhms, 0.25W, ±10% tolerance, ±100ppm/°C temperature coefficient) and mechanical characteristics (surface mount, J Lead termination, side adjustment). Physical dimensions differ by less than 0.01 inches, which does not affect PCB layout compatibility for standard applications.

Q: What is the significance of the turn count difference (12 vs. 11 turns)?

A: Turn count affects adjustment resolution. The SM4ETA504 provides 12 turns for finer adjustment granularity, while the SM-42TA504 provides 11 turns. Both maintain the same electrical performance and tolerance specifications. Applications requiring specific adjustment resolution should evaluate this parameter against functional requirements.

Q: Are there packaging differences between these parts?

A: The SM4ETA504 is listed with standard packaging, while the SM-42TA504 is supplied in Tape & Reel format. Tape & Reel packaging is standard for automated assembly processes and does not affect component performance or electrical characteristics.

Q: Why is the SM4ETA504 marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. The SM-42TA504, as an active product from the same manufacturer with equivalent specifications, provides continuity for ongoing applications and new designs.

Q: Are both parts RoHS compliant?

A: Yes. Both the SM4ETA504 and SM-42TA504 are ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.