TE Connectivity 3150W203P Surface Mount Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3150W203P is a 20 kOhms, 0.2W surface mount trimmer potentiometer with J Lead termination and top adjustment capability. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production applications. The part features Cermet resistive material construction with 1.0 turn adjustment and rectangular form factor measuring 4.20mm x 3.80mm.

Substiute Parts

3150W203P

TE Connectivity Passive ProductIn Stock: 10373150W203P Datasheet

Current PartRFQ

23AR20KLFTR

TT Electronics/BIIn Stock: 886623AR20KLFTR Datasheet

SimilarRFQ

TC33X-1-203E

Bourns Inc.In Stock: 10190TC33X-1-203E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3150W203P is determined by the following critical parameters:

Core Compatibility Requirements:

• Resistance value: 20 kOhms (exact match required)
• Termination style: J Lead (exact match required)
• Adjustment type: Top Adjustment (exact match required)
• Mounting type: Surface Mount (exact match required)
• Resistive material: Cermet (exact match required)
• Number of turns: 1.0 (exact match required)

Allowable Variation Parameters:

• Power rating: Equal to or greater than 0.2W
• Tolerance: Equal to or tighter than ±25%
• Temperature coefficient: Equal to or better than ±250ppm/°C
• Physical dimensions: Rectangular form factor with allowable size variation within PCB layout constraints
• Product status: Active status preferred for long-term availability

Both identified substitute parts meet all core compatibility requirements and provide equal or superior electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

23AR20KLFTR (TT Electronics/BI): This substitute provides superior electrical performance with tighter tolerance (±20% versus ±25%) and improved temperature coefficient (±100ppm/°C versus ±250ppm/°C). The part carries active product status with RoHS compliance certification. Power rating of 0.25W exceeds the original 0.2W specification. Physical dimensions are slightly larger (5.00mm x 4.50mm), requiring verification of PCB layout compatibility. This option is suitable for applications requiring enhanced stability and long-term supply assurance.

TC33X-1-203E (Bourns Inc.): This substitute maintains identical tolerance and temperature coefficient specifications to the original part. The component carries active product status with ROHS3 compliance and REACH unaffected designation. Power rating of 0.1W is lower than the original 0.2W specification and requires application power dissipation analysis to confirm suitability. Physical dimensions are smaller (3.80mm x 3.60mm), offering potential PCB space optimization. This option is suitable for applications with lower power dissipation requirements and compact layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the 23AR20KLFTR substitute for the 3150W203P in all applications?

A: The 23AR20KLFTR meets all core compatibility requirements with superior electrical performance. However, the larger physical dimensions (5.00mm x 4.50mm versus 4.20mm x 3.80mm) require PCB layout verification to confirm mounting clearance and spacing compatibility.

Q: Is the TC33X-1-203E suitable for high-power applications?

A: The TC33X-1-203E has a power rating of 0.1W, which is lower than the original 3150W203P specification of 0.2W. Applications must be evaluated to confirm that actual power dissipation does not exceed 0.1W. If the application requires 0.2W or higher power handling, the 23AR20KLFTR is the appropriate selection.

Q: What are the key differences in electrical performance between the substitutes?

A: The 23AR20KLFTR provides tighter tolerance (±20%) and superior temperature stability (±100ppm/°C) compared to both the original part and the TC33X-1-203E. The TC33X-1-203E maintains identical tolerance and temperature coefficient to the original part. Selection depends on application requirements for accuracy and thermal stability.

Q: Are both substitutes RoHS compliant?

A: Yes. The 23AR20KLFTR carries RoHS compliance certification. The TC33X-1-203E carries ROHS3 compliance certification. Both meet regulatory requirements for RoHS-restricted substance limitations.

Q: What is the impact of physical size differences on PCB design?

A: The 23AR20KLFTR is larger (5.00mm x 4.50mm) and may require additional PCB space. The TC33X-1-203E is smaller (3.80mm x 3.60mm) and may enable PCB space reduction. PCB layout files must be reviewed to confirm mounting pad compatibility and clearance requirements for the selected substitute.

Q: Can both substitutes be used interchangeably in existing designs?

A: Both substitutes are electrically compatible with the original part specifications. However, physical dimensions differ, requiring PCB layout verification before implementation. Packaging format (Tape & Reel for both substitutes) must also be confirmed compatible with assembly equipment.

Q: Why is the original 3150W203P classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The identified active substitutes provide equivalent or superior functionality and ensure continued availability for new production and design updates.