TE Connectivity 3142W503P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3142W503P is a 50 kOhm 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 equivalent substitute parts for ongoing design requirements and production continuity. The part features cermet resistive material construction with 1.0 turn adjustment and rectangular form factor suitable for compact PCB layouts.

Substiute Parts

3142W503P

TE Connectivity Passive ProductIn Stock: 8253142W503P Datasheet

Current PartRFQ

23AR50KLFTR

TT Electronics/BIIn Stock: 248323AR50KLFTR Datasheet

SimilarRFQ

TC33X-2-503E

Bourns Inc.In Stock: 7593TC33X-2-503E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3142W503P are identified based on the following critical parameters that determine functional compatibility:

Core Compatibility Parameters:

• Resistance value: 50 kOhms (exact match required)
• Termination style: J Lead (exact match required)
• Adjustment type: Top Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Number of turns: 1.0 (exact match required)

Allowable Variation Parameters:

• Power rating: Substitute parts may have equal or higher power ratings
• Tolerance: Substitute parts may have equal or tighter tolerance specifications
• Temperature coefficient: Substitute parts may have equal or lower temperature coefficient values
• Physical dimensions: Minor variations acceptable within standard PCB assembly tolerances
• Product status: Active status preferred for long-term availability

The identified substitute parts meet all core compatibility requirements while offering improvements in certain electrical characteristics or enhanced product availability status.

Parameter Comparison

Engineering Selection Recommendations

TC33X-2-503E (Bourns Inc.) - Primary Substitute

The Bourns TC33X-2-503E is the preferred substitute for the obsolete 3142W503P. This part maintains identical electrical specifications including 50 kOhm resistance, ±25% tolerance, and ±250ppm/°C temperature coefficient. The TC33X-2-503E carries active product status, ensuring long-term availability and supply chain continuity. ROHS3 compliance and MSL 1 rating match the original specification. The smaller physical footprint (3.80mm x 3.60mm versus 4.50mm x 4.00mm) provides design flexibility for space-constrained applications. The 0.1W power rating is lower than the original 0.15W specification; this substitution is appropriate only when circuit power dissipation requirements do not exceed 0.1W.

23AR50KLFTR (TT Electronics/BI) - Secondary Substitute

The TT Electronics/BI 23AR50KLFTR provides an alternative substitute with enhanced electrical performance characteristics. This part maintains 50 kOhm resistance with improved ±20% tolerance and superior ±100ppm/°C temperature coefficient. Active product status and RoHS compliance ensure availability. The 0.25W power rating exceeds the original specification, providing margin for applications with higher power dissipation requirements. The larger physical footprint (5.00mm x 4.50mm) requires PCB layout verification for space compatibility. This substitute is suitable for applications where improved temperature stability and higher power handling are beneficial.

Frequently Asked Questions (FAQ)

Q: Can the TC33X-2-503E substitute for the 3142W503P in all applications?

A: The TC33X-2-503E is electrically compatible with identical resistance, tolerance, and temperature coefficient specifications. However, the 0.1W power rating is lower than the original 0.15W. Substitution is valid only when circuit power dissipation does not exceed 0.1W. The smaller physical dimensions (3.80mm x 3.60mm) require PCB layout verification.

Q: What are the advantages of using the 23AR50KLFTR substitute?

A: The 23AR50KLFTR offers improved tolerance (±20% versus ±25%) and superior temperature coefficient (±100ppm/°C versus ±250ppm/°C). The higher 0.25W power rating provides additional margin for power dissipation. Active product status ensures long-term supply availability.

Q: Are there physical dimension constraints when substituting these parts?

A: Yes. The three parts have different rectangular footprints: 3142W503P (4.50mm x 4.00mm), TC33X-2-503E (3.80mm x 3.60mm), and 23AR50KLFTR (5.00mm x 4.50mm). PCB layout and assembly equipment compatibility must be verified before substitution.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The 3142W503P is ROHS3 compliant, TC33X-2-503E is ROHS3 compliant, and 23AR50KLFTR is RoHS compliant. All parts meet current environmental regulatory requirements.

Q: What is the significance of the obsolete product status for the 3142W503P?

A: Obsolete status indicates the part is no longer manufactured or supported by TE Connectivity. Substitution with active-status alternatives (TC33X-2-503E or 23AR50KLFTR) is necessary for new designs and ongoing production to ensure supply chain continuity and manufacturer support.

Q: Are the J lead termination styles identical across all three parts?

A: Yes. All three parts feature J lead surface mount termination, ensuring compatibility with existing PCB assembly processes and solder reflow profiles.

Q: Which substitute is recommended for new design implementations?

A: Selection between TC33X-2-503E and 23AR50KLFTR depends on specific application requirements. For space-constrained designs with power dissipation below 0.1W, the TC33X-2-503E is appropriate. For applications requiring higher power handling or improved temperature stability, the 23AR50KLFTR is suitable.