TE Connectivity 3150W503P Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3150W503P is a 50 kOhm surface mount trimmer potentiometer rated at 0.2W (1/5W) with J Lead termination and top adjustment capability. This component belongs to the 3150 series and utilizes cermet resistive material for reliable performance across industrial applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility while ensuring continued supply chain availability and compliance with current manufacturing standards.

Substiute Parts

3150W503P

TE Connectivity Passive ProductIn Stock: 12313150W503P Datasheet

Current PartRFQ

TC33X-1-503E

Bourns Inc.In Stock: 16978TC33X-1-503E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete TE Connectivity 3150W503P is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 50 kOhms
• Termination style: J Lead
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Temperature coefficient: ±250ppm/°C
• Tolerance: ±25%
• Number of turns: 1
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

Allowable Variation:

• Power rating: The substitute part (TC33X-1-503E) is rated at 0.1W (1/10W), which is lower than the original 0.2W rating. This represents a reduction in power dissipation capability and must be evaluated against actual circuit requirements.
• Face dimension: The substitute measures 0.150" x 0.142" (3.80mm x 3.60mm), which is slightly smaller than the original 0.165" x 0.150" (4.20mm x 3.80mm). Physical board layout compatibility must be confirmed.

Parameter Comparison

Engineering Selection Recommendations

The Bourns TC33X-1-503E serves as a functional equivalent for the obsolete TE Connectivity 3150W503P based on electrical parameter alignment and active product status. Both components maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory consistency.

Critical Considerations for Implementation:

The TC33X-1-503E operates at a reduced power rating of 0.1W compared to the original 0.2W specification. Circuit designs operating near the original power dissipation limit require thermal analysis to confirm the substitute's adequacy. Applications with power dissipation below 0.1W proceed without thermal constraint.

The substitute component features a marginally reduced footprint (0.150" x 0.142" versus 0.165" x 0.150"). Existing printed circuit board layouts designed for the original part accommodate the smaller substitute without modification. New designs benefit from the reduced board space requirement.

The TC33X-1-503E is supplied in Tape & Reel packaging, supporting automated assembly processes. The original part's packaging specification is not provided; packaging compatibility with existing manufacturing workflows must be confirmed independently.

Both components share identical electrical characteristics: 50 kOhm resistance, ±25% tolerance, ±250ppm/°C temperature coefficient, single-turn adjustment, cermet construction, and J Lead surface mount termination. These parameters ensure direct functional substitution in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can the TC33X-1-503E directly replace the 3150W503P in existing designs?

A: The TC33X-1-503E provides electrical equivalence across all primary parameters: resistance value, tolerance, temperature coefficient, adjustment type, and termination style. Physical board layout compatibility requires confirmation due to the slightly smaller footprint. Power rating reduction from 0.2W to 0.1W necessitates thermal analysis for applications operating near maximum dissipation limits.

Q: What is the significance of the power rating difference between these parts?

A: The original 3150W503P is rated at 0.2W (1/5W), while the TC33X-1-503E is rated at 0.1W (1/10W). This represents a 50% reduction in maximum continuous power dissipation capability. Circuits designed to operate below 0.1W dissipation experience no functional impact. Applications requiring power dissipation between 0.1W and 0.2W require thermal evaluation to confirm the substitute's suitability.

Q: Are there dimensional compatibility issues between these components?

A: The TC33X-1-503E measures 0.150" x 0.142" (3.80mm x 3.60mm) compared to the original 0.165" x 0.150" (4.20mm x 3.80mm). The substitute is smaller in both dimensions. Existing board layouts accommodate the smaller component without modification. New designs may benefit from the reduced footprint.

Q: Do both parts meet the same compliance standards?

A: Both the 3150W503P and TC33X-1-503E are ROHS3 compliant and carry identical Moisture Sensitivity Level 1 (Unlimited) ratings. Regulatory compliance remains consistent across the substitution.

Q: What is the difference between the 3150 series and the TC33 series?

A: The 3150W503P belongs to the TE Connectivity 3150 series (now obsolete), while the TC33X-1-503E is part of the Bourns Trimpot® TC33 Open Frame series (active production). Both series employ cermet resistive material and J Lead termination for surface mount applications. The TC33 series maintains current manufacturing support and supply chain availability.

Q: How does the packaging format affect implementation?

A: The TC33X-1-503E is supplied in Tape & Reel (TR) format, supporting automated pick-and-place assembly. The original part's packaging specification is not documented. Manufacturing process compatibility with Tape & Reel packaging must be confirmed for existing production workflows.

Q: Are the adjustment mechanisms identical between these parts?

A: Both components feature top adjustment with single-turn (1-turn) operation. Adjustment torque, resolution, and mechanical feel specifications are not provided in the available data. Physical evaluation is recommended if adjustment characteristics are critical to application performance.