TE Connectivity 3142W102P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3142W102P is a 1 kOhms surface mount trimmer potentiometer rated at 0.15W with J Lead termination and top adjustment capability. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The 3142 series from TE Connectivity Passive Product utilizes cermet resistive material construction with 1.0 turn adjustment resolution.

Substiute Parts

3142W102P

TE Connectivity Passive ProductIn Stock: 7923142W102P Datasheet

Current PartRFQ

ST-4ETA102

Nidec Components CorporationIn Stock: 11392ST-4ETA102 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3142W102P is based on the following critical parameters that must remain compatible:

Primary Compatibility Criteria:

• Resistance value: 1 kOhms (exact match required)
• Termination style: J Lead (mechanical and electrical interface requirement)
• Adjustment type: Top Adjustment (functional requirement)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Resistive material: Cermet (performance and stability characteristics)
• Number of turns: 1.0 (adjustment resolution requirement)

Secondary Compatibility Criteria:

• Power rating: Substitute must equal or exceed 0.15W
• Tolerance: Substitute tolerance of ±20% or better is acceptable
• Temperature coefficient: Substitute of ±100ppm/°C or better is acceptable
• RoHS3 compliance: Required for regulatory alignment
• Moisture sensitivity level: MSL 1 is acceptable

The Nidec Components Corporation ST-4ETA102 meets all primary and secondary compatibility criteria, with enhanced specifications in power rating (0.25W), tolerance (±20%), and temperature coefficient (±100ppm/°C).

Parameter Comparison

Engineering Selection Recommendations

The Nidec Components Corporation ST-4ETA102 is the direct functional equivalent for the obsolete TE Connectivity 3142W102P. Selection of the ST-4ETA102 is supported by the following engineering factors:

Compliance and Availability: The ST-4ETA102 maintains ROHS3 compliance and is actively manufactured with 11,333 pieces in current inventory, ensuring supply chain continuity for production and design transitions.

Performance Enhancement: The substitute part provides improved specifications across three key parameters: power rating increased from 0.15W to 0.25W, tolerance tightened from ±25% to ±20%, and temperature coefficient improved from ±250ppm/°C to ±100ppm/°C. These enhancements provide greater operational margin and stability without introducing incompatibility.

Physical Compatibility: Both components utilize identical J Lead termination, top adjustment mechanism, and surface mount configuration. The ST-4ETA102 footprint is marginally larger (0.197" x 0.177" versus 0.177" x 0.157"), requiring verification of available PCB space in existing designs. The increase represents approximately 11% in length and 13% in width.

Regulatory Alignment: Both components are ROHS3 compliant with MSL 1 rating, maintaining regulatory requirements for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the Nidec ST-4ETA102 directly replace the TE Connectivity 3142W102P in existing designs?

A: The ST-4ETA102 is functionally equivalent for all electrical parameters and termination style. PCB layout verification is required due to the slightly larger footprint (0.197" x 0.177" versus 0.177" x 0.157"). If PCB space permits the larger dimensions, direct substitution is valid.

Q: What is the significance of the improved tolerance specification (±20% versus ±25%)?

A: The tighter tolerance of ±20% on the ST-4ETA102 provides greater accuracy in the final resistance value. For applications where the original ±25% tolerance was acceptable, the improved specification presents no compatibility issues and enhances circuit performance.

Q: Does the higher power rating (0.25W versus 0.15W) affect circuit operation?

A: The power rating indicates the maximum power the component can dissipate without damage. A higher rating does not change circuit behavior; it only provides additional thermal margin. If the original design operated within 0.15W dissipation, the 0.25W rating of the substitute ensures equivalent or improved reliability.

Q: Are there any packaging differences between these components?

A: The TE Connectivity 3142W102P packaging information was not specified in the original documentation. The Nidec ST-4ETA102 is supplied in Tape & Reel (TR) packaging, standard for surface mount production environments.

Q: What is the temperature coefficient, and why does the improved specification matter?

A: Temperature coefficient (±100ppm/°C for the substitute versus ±250ppm/°C for the original) measures resistance value drift across temperature ranges. The improved specification of the ST-4ETA102 means the resistance value remains more stable across operating temperature variations, beneficial for precision applications.

Q: Is the ST-4ETA102 available in the same quantities as the original part?

A: The ST-4ETA102 has 11,333 pieces in current inventory compared to 713 pieces for the obsolete 3142W102P, providing significantly greater supply availability for production requirements.

Q: What certifications apply to the substitute part?

A: The Nidec ST-4ETA102 is ROHS3 compliant, REACH unaffected, with ECCN classification EAR99 and HTSUS code 8533.40.8050, matching the regulatory framework of the original component.