TE Connectivity 3142W103P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3142W103P is a 10 kOhms surface mount trimmer potentiometer with 0.15W power rating, 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 3142W103P features cermet resistive material construction with 1.0 turn adjustment and rectangular form factor measuring 4.50mm x 4.00mm.

Substiute Parts

3142W103P

TE Connectivity Passive ProductIn Stock: 9803142W103P Datasheet

Current PartRFQ

ST-4ETA103

Nidec Components CorporationIn Stock: 1938ST-4ETA103 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3142W103P is based on electrical and mechanical parameter alignment within the surface mount trimmer potentiometer category. The critical substitution parameters are:

Electrical Parameters:

• Resistance value: 10 kOhms (exact match required)
• Number of turns: 1.0 (single-turn adjustment)
• Adjustment type: Top Adjustment (functional equivalence)
• Resistive material: Cermet (material class equivalence)
• Termination style: J Lead (mechanical and electrical interface)

Mechanical Parameters:

• Mounting type: Surface Mount (PCB assembly compatibility)
• Form factor: Rectangular configuration (footprint consideration)

Compliance Parameters:

• RoHS3 compliance (regulatory requirement)
• Moisture Sensitivity Level 1 (handling and storage compatibility)

The Nidec Components Corporation ST-4ETA103 qualifies as a substitute based on matching all critical electrical parameters and maintaining compatible mechanical and compliance characteristics. Variations in power rating (0.25W versus 0.15W), tolerance (±20% versus ±25%), temperature coefficient (±100ppm/°C versus ±250ppm/°C), and physical dimensions represent acceptable engineering trade-offs within the substitution framework.

Parameter Comparison

Engineering Selection Recommendations

The Nidec Components Corporation ST-4ETA103 is the identified substitute for the obsolete TE Connectivity 3142W103P. Selection of this substitute is supported by the following engineering criteria:

Product Status Alignment: The ST-4ETA103 maintains active product status, ensuring continued availability and manufacturer support. The 3142W103P obsolete status necessitates transition to an active equivalent for production continuity.

Regulatory Compliance: Both components maintain ROHS3 compliance and identical Moisture Sensitivity Level 1 classification, ensuring equivalent handling, storage, and environmental compliance requirements.

Electrical Equivalence: Matching 10 kOhms resistance and 1.0 turn configuration provide direct functional equivalence. The ST-4ETA103 offers improved specifications in tolerance (±20% versus ±25%) and temperature coefficient (±100ppm/°C versus ±250ppm/°C), representing performance enhancement rather than degradation.

Power Rating Consideration: The ST-4ETA103 0.25W rating exceeds the 3142W103P 0.15W specification, providing additional thermal margin in applications where the original component operated within its power envelope.

Physical Footprint: The ST-4ETA103 exhibits slightly larger dimensions (5.00mm x 4.50mm versus 4.50mm x 4.00mm). PCB layout verification is required to confirm accommodation of the larger form factor within existing design constraints.

Packaging Availability: The ST-4ETA103 is supplied in Tape & Reel packaging, standard for high-volume surface mount assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the Nidec ST-4ETA103 directly replace the TE Connectivity 3142W103P in existing designs?

A: The ST-4ETA103 provides electrical and functional equivalence based on matching resistance, turn count, adjustment type, and termination style. Physical footprint verification is required, as the ST-4ETA103 is slightly larger (5.00mm x 4.50mm versus 4.50mm x 4.00mm). PCB layout must accommodate this dimensional difference.

Q: What are the key electrical differences between these components?

A: The ST-4ETA103 offers improved tolerance (±20% versus ±25%) and superior temperature coefficient performance (±100ppm/°C versus ±250ppm/°C). Power rating is higher (0.25W versus 0.15W), providing additional thermal capacity. These represent specification enhancements for the substitute part.

Q: Are both components RoHS compliant?

A: Yes, both the 3142W103P and ST-4ETA103 are ROHS3 compliant with identical Moisture Sensitivity Level 1 classification, ensuring equivalent regulatory and environmental compliance.

Q: What is the significance of the J Lead termination style?

A: J Lead termination provides the mechanical and electrical interface for surface mount assembly. Both components utilize identical J Lead termination, ensuring compatibility with existing PCB pad patterns and reflow soldering processes.

Q: Does the larger size of the ST-4ETA103 affect circuit performance?

A: Physical size does not affect electrical performance. The dimensional difference (5.00mm x 4.50mm versus 4.50mm x 4.00mm) is a mechanical consideration relevant only to PCB layout and available board space. Electrical characteristics remain equivalent based on matching resistance, tolerance, and temperature coefficient specifications.

Q: What packaging formats are available for the ST-4ETA103?

A: The ST-4ETA103 is supplied in Tape & Reel (TR) packaging, standard for automated surface mount assembly operations. This packaging format is compatible with standard pick-and-place equipment.

Q: Is design re-qualification required when substituting the ST-4ETA103 for the 3142W103P?

A: Design re-qualification scope depends on application-specific requirements and existing design margins. The improved specifications of the ST-4ETA103 (tighter tolerance, lower temperature coefficient, higher power rating) generally support direct substitution. PCB layout verification for the larger footprint is mandatory.