TE Connectivity 3142W203P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3142W203P is a 20 kOhm surface mount trimmer potentiometer with 0.15W power rating, J Lead termination, and top adjustment capability. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support, maintenance, and design continuity. The 3142W203P utilizes cermet resistive material and is housed in a compact rectangular package measuring 4.50mm x 4.00mm.

Substiute Parts

3142W203P

TE Connectivity Passive ProductIn Stock: 9083142W203P Datasheet

Current PartRFQ

23AR20KLFTR

TT Electronics/BIIn Stock: 886623AR20KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 3142W203P is determined by the following critical parameters that must remain constant or be compatible with the original design:

Core Matching Parameters:

• Resistance value: 20 kOhms (exact match required)
• Termination style: J Lead (mechanical and electrical compatibility)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Adjustment type: Top Adjustment (functional requirement)
• Resistive material: Cermet (performance characteristics)
• Number of turns: 1.0 Turn (adjustment resolution)

Allowable Variation Parameters:

• Power rating: Substitute parts may have equal or higher power ratings without functional degradation
• Tolerance: Substitute parts with tighter tolerance specifications are acceptable
• Temperature coefficient: Substitute parts with lower temperature coefficient values provide improved stability
• Package dimensions: Minor dimensional variations are acceptable provided the component fits within the PCB footprint and does not create mechanical interference

The TT Electronics/BI 23AR20KLFTR qualifies as a substitute based on matching all core parameters while providing enhanced specifications in power rating, tolerance, and temperature coefficient.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TT Electronics/BI 23AR20KLFTR

The TT Electronics/BI 23AR20KLFTR is the qualified substitute for the obsolete TE Connectivity 3142W203P. This substitution is supported by the following engineering factors:

Functional Compatibility: All critical electrical parameters match or exceed the original specification. The 20 kOhm resistance value, 1.0 turn adjustment, J Lead termination, and cermet resistive material provide direct functional equivalence.

Performance Enhancement: The substitute part provides improved specifications across three parameters: increased power rating (0.25W versus 0.15W), tighter tolerance (±20% versus ±25%), and superior temperature stability (±100ppm/°C versus ±250ppm/°C). These enhancements do not create incompatibility and support long-term reliability.

Compliance Status: Both components maintain RoHS compliance and unlimited moisture sensitivity rating (MSL 1). The substitute part is classified as active product status, ensuring continued availability and supply chain support.

Physical Compatibility: The substitute part dimensions (5.00mm x 4.50mm) are slightly larger than the original (4.50mm x 4.00mm). PCB layout verification is required to confirm the component fits within the allocated footprint space without mechanical interference or thermal management issues.

Supply Chain Availability: The TT Electronics/BI 23AR20KLFTR maintains active inventory status with 8784 units available, compared to the obsolete 3142W203P with limited remaining stock of 839 units.

Frequently Asked Questions (FAQ)

Q: Can the TT Electronics/BI 23AR20KLFTR directly replace the TE Connectivity 3142W203P without circuit modification?

A: Yes. The substitute part maintains identical resistance value, termination style, mounting type, adjustment type, and resistive material. The enhanced power rating, tighter tolerance, and improved temperature coefficient do not require circuit modification and provide performance benefits.

Q: What is the significance of the package dimension difference between the two parts?

A: The substitute part (5.00mm x 4.50mm) is approximately 0.5mm larger in each dimension compared to the original (4.50mm x 4.00mm). PCB layout verification is necessary to confirm adequate clearance within the allocated component footprint. If space constraints exist, alternative substitutes or design modifications may be required.

Q: Are both parts RoHS compliant?

A: Yes. The TE Connectivity 3142W203P is ROHS3 compliant, and the TT Electronics/BI 23AR20KLFTR is RoHS compliant. Both components meet environmental regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: What does the ±20% tolerance on the substitute part mean compared to the ±25% tolerance on the original?

A: The substitute part tolerance of ±20% is tighter than the original ±25%, meaning the actual resistance value will remain closer to the nominal 20 kOhm specification. This provides improved circuit performance and reduced variability across production batches.

Q: How does the temperature coefficient difference affect circuit performance?

A: The substitute part temperature coefficient of ±100ppm/°C is superior to the original ±250ppm/°C. This means the resistance value will change less with temperature variations, resulting in improved circuit stability across the operating temperature range.

Q: Is the substitute part available in the same packaging format?

A: The original part is specified with "-" packaging notation. The substitute part is available in Tape & Reel (TR) packaging, which is standard for surface mount component distribution and automated assembly processes.

Q: What is the moisture sensitivity level, and does it differ between the parts?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture absorption restrictions during storage or handling. Standard component storage practices apply to both parts.

Q: Can I use the substitute part in new designs, or is it only for replacement of obsolete components?

A: The TT Electronics/BI 23AR20KLFTR is classified as active product status and is suitable for both new designs and replacement applications. The enhanced specifications make it a preferred choice for new development.