TE Connectivity 3142W504P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3142W504P is a 500 kOhms surface mount trimmer potentiometer with 0.15W power rating, cermet resistive material, and J lead termination. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part features 1.0 turn top adjustment with ±25% tolerance and ±250ppm/°C temperature coefficient, suitable for precision circuit tuning applications in compact form factors.

Substiute Parts

3142W504P

TE Connectivity Passive ProductIn Stock: 24713142W504P Datasheet

Current PartRFQ

TC33X-2-504E

Bourns Inc.In Stock: 20019TC33X-2-504E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 3142W504P is based on electrical and mechanical parameter alignment within the trimmer potentiometer category. The critical parameters determining substitution eligibility are:

Electrical Parameters:

• Resistance value: 500 kOhms (exact match required)
• Tolerance: ±25% (matching specification)
• Temperature coefficient: ±250ppm/°C (matching specification)
• Number of turns: 1.0 turn (single-turn adjustment)

Mechanical Parameters:

• Mounting type: Surface mount (PCB compatibility)
• Termination style: J lead (solder connection method)
• Adjustment type: Top adjustment (user interface consistency)
• Resistive material: Cermet (performance characteristics)

Environmental & Compliance Parameters:

• RoHS compliance status
• Moisture sensitivity level: MSL 1

The Bourns TC33X-2-504E qualifies as a direct substitute based on matching all critical electrical parameters, identical mechanical interface characteristics, and superior product status (active production). The power rating differential (0.1W versus 0.15W) represents a conservative design consideration within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

The Bourns TC33X-2-504E represents the qualified substitute for the obsolete TE Connectivity 3142W504P based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters align exactly, including 500 kOhms resistance, ±25% tolerance, and ±250ppm/°C temperature coefficient. These specifications ensure functional equivalence in circuit tuning applications.

Mechanical Compatibility: Both components feature identical J lead termination, surface mount configuration, and top adjustment interface. The TC33X-2-504E exhibits a smaller footprint (3.80mm x 3.60mm versus 4.50mm x 4.00mm), which provides layout flexibility without compromising electrical performance.

Compliance Status: The TC33X-2-504E maintains ROHS3 compliance and MSL 1 rating, meeting current environmental and reliability standards. The active production status of the Bourns component ensures long-term supply chain availability and technical support.

Power Rating Consideration: The TC33X-2-504E operates at 0.1W compared to the original 0.15W specification. This represents a conservative design margin suitable for trimmer potentiometer applications where power dissipation is typically minimal. Circuit thermal analysis should confirm that the lower power rating accommodates the intended application duty cycle.

Frequently Asked Questions (FAQ)

Q: Can the Bourns TC33X-2-504E directly replace the TE Connectivity 3142W504P on existing PCB layouts?

A: The TC33X-2-504E features identical J lead termination and top adjustment interface, enabling direct functional replacement. The smaller footprint (3.80mm x 3.60mm versus 4.50mm x 4.00mm) requires verification that the PCB layout accommodates the reduced dimensions. No electrical redesign is necessary.

Q: What is the significance of the power rating difference between 0.15W and 0.1W?

A: Trimmer potentiometers typically operate at power levels substantially below their rated capacity. The 0.1W rating of the TC33X-2-504E is sufficient for standard circuit tuning applications. Applications requiring continuous high-power dissipation should undergo thermal analysis to confirm the lower rating remains acceptable.

Q: Are the tolerance and temperature coefficient specifications identical between these components?

A: Yes. Both the 3142W504P and TC33X-2-504E specify ±25% tolerance and ±250ppm/°C temperature coefficient. These matching specifications ensure equivalent circuit performance and tuning stability across the operating temperature range.

Q: Does the smaller physical size of the TC33X-2-504E affect its electrical performance?

A: No. The reduced footprint does not alter electrical characteristics. The 500 kOhms resistance, tolerance, and temperature coefficient remain identical. The size difference reflects manufacturing process improvements in the Bourns design without performance degradation.

Q: What compliance certifications apply to the substitute part?

A: The Bourns TC33X-2-504E carries ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards for electronic components.

Q: Is the TC33X-2-504E available in the same packaging format?

A: The TC33X-2-504E is supplied in Tape & Reel (TR) packaging, which is standard for surface mount production environments. The original 3142W504P packaging specification was not provided in the reference data.