TC86W-1-203 Equivalent & Substitute Parts

Part Overview

The TC86W-1-203 is a 20 kOhms trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC86 series. This through-hole component features PC pin termination, side adjustment, and a 0.3W power rating with cermet resistive material. The TC86W-1-203 is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement planning. The primary substitute maintains the same resistance value and core electrical characteristics while offering active product status and improved availability.

Substiute Parts

TC86W-1-203

Bourns Inc.In Stock: 752TC86W-1-203 Datasheet

Current PartRFQ

3306W-1-203

Bourns Inc.In Stock: 19493306W-1-203 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The 3306W-1-203 qualifies as a functional substitute for the TC86W-1-203 based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Resistance value: 20 kOhms (identical)
• Temperature coefficient: ±250ppm/°C (identical)
• Number of turns: 1 (identical)
• Adjustment type: Side adjustment (identical)
• Resistive material: Cermet (identical)
• Mounting type: Through hole (identical)
• Termination style: PC pins (identical)
• RoHS compliance: ROHS3 compliant (identical)
• MSL rating: 1 (Unlimited) (identical)

Differing Parameters:

• Power rating: 0.2W (1/5W) versus 0.3W
• Tolerance: ±25% versus ±20%
• Physical dimensions: 0.268" x 0.319" (6.81mm x 8.10mm) versus 0.303" x 0.268" (7.70mm x 6.80mm)
• Product status: Active versus Obsolete

The substitute maintains electrical functionality across the specified resistance and temperature operating range. Physical dimension differences require verification against PCB layout constraints.

Parameter Comparison

Engineering Selection Recommendations

The 3306W-1-203 is the primary substitute for the obsolete TC86W-1-203. Both components are manufactured by Bourns Inc. and maintain ROHS3 compliance and unlimited moisture sensitivity ratings, supporting continued use in regulated applications.

The 3306W-1-203 offers active product status with established supply chain availability (1912 pcs in stock versus 661 pcs for the TC86W-1-203). This substitute is suitable for applications where the 0.2W power rating meets or exceeds circuit requirements and where the ±25% tolerance specification is acceptable.

Physical dimension differences between the two components require PCB layout verification prior to implementation. The substitute's slightly different footprint may necessitate minor layout adjustments in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 3306W-1-203 directly replace the TC86W-1-203 in existing designs?

A: Electrical substitution is valid when circuit power dissipation does not exceed 0.2W and tolerance requirements accept ±25%. Physical dimensions differ, requiring PCB layout verification before implementation.

Q: What is the impact of the lower power rating on the 3306W-1-203?

A: The 0.2W rating of the 3306W-1-203 is lower than the 0.3W rating of the TC86W-1-203. Verify that actual circuit power dissipation remains below 0.2W to ensure reliable operation and component longevity.

Q: Are there compliance differences between these components?

A: Both components are ROHS3 compliant with MSL rating 1 (Unlimited). No compliance barriers exist for substitution in regulated applications.

Q: How do tolerance differences affect circuit performance?

A: The TC86W-1-203 specifies ±20% tolerance while the 3306W-1-203 specifies ±25%. Applications requiring tighter tolerance control may require additional circuit compensation or selection screening.

Q: What are the physical dimension implications?

A: The TC86W-1-203 measures 0.303" x 0.268" while the 3306W-1-203 measures 0.268" x 0.319". Verify PCB hole spacing and component clearances before substitution to ensure mechanical compatibility.

Q: Why is the TC86W-1-203 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 3306W-1-203 represents the active alternative within the Bourns trimmer potentiometer portfolio for this resistance value and configuration.