TC86F-1-204 Equivalent & Substitute Parts

Part Overview

The TC86F-1-204 is a 200 kOhms trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC86 series. This through-hole component features PC pin termination, cermet resistive material, and top adjustment capability with 1 turn operation. The part is rated for 0.3W power dissipation with ±20% tolerance and ±250ppm/°C temperature coefficient.

The TC86F-1-204 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this model is no longer readily procurable from primary sources.

Substiute Parts

TC86F-1-204

Bourns Inc.In Stock: 951TC86F-1-204 Datasheet

Current PartRFQ

3306F-1-204

Bourns Inc.In Stock: 72843306F-1-204 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC86F-1-204 is determined by the following critical parameters:

• Resistance value: 200 kOhms (exact match required)
• Resistive material: Cermet (maintains performance characteristics)
• Mounting type: Through Hole (PCB assembly compatibility)
• Termination style: PC Pins (board connection method)
• Adjustment type: Top Adjustment (user interface consistency)
• Number of turns: 1 (operational consistency)
• Temperature coefficient: ±250ppm/°C (thermal stability requirement)

The 3306F-1-204 meets all primary substitution criteria. While it operates at 0.2W versus the original 0.3W rating and has slightly different tolerance (±25% versus ±20%), these parameters remain within acceptable substitution boundaries for equivalent functionality. The dimensional difference (0.319" x 0.268" versus 0.303" x 0.268") requires verification for PCB layout compatibility in space-constrained applications.

Parameter Comparison

Engineering Selection Recommendations

The 3306F-1-204 is the primary substitute for the obsolete TC86F-1-204. Both parts are manufactured by Bourns Inc. and share identical core electrical specifications: 200 kOhms resistance, ±250ppm/°C temperature coefficient, cermet material, 1-turn top adjustment, and through-hole PC pin termination.

The 3306F-1-204 carries Active product status, ensuring ongoing availability and supply chain continuity. Both parts maintain ROHS3 compliance and MSL Level 1 rating, meeting current regulatory and environmental requirements.

The substitute part operates at 0.2W versus the original 0.3W specification. This reduced power rating is acceptable in applications where the original 0.3W margin is not critical to circuit operation. The tolerance difference (±25% versus ±20%) represents a minor specification relaxation and does not preclude substitution in standard trimmer potentiometer applications.

Physical dimensions differ by 0.016" (0.4mm) in width. PCB layout verification is required to confirm that the 3306F-1-204 footprint accommodates the slightly larger body without interference or rework.

Frequently Asked Questions (FAQ)

Q: Can the 3306F-1-204 directly replace the TC86F-1-204 without PCB modification?

A: Direct replacement is possible if PCB layout accommodates the 0.319" width of the 3306F-1-204 versus the 0.303" width of the original part. The height remains identical at 0.268". Verify mounting hole spacing and adjacent component clearance before implementation.

Q: What is the impact of the 0.1W power rating reduction?

A: The 3306F-1-204 is rated for 0.2W versus the original 0.3W. This reduction is acceptable in applications where circuit power dissipation does not exceed the substitute part's thermal limits. Verify actual operating power in your specific application.

Q: Are tolerance differences significant for this substitution?

A: The 3306F-1-204 tolerance of ±25% versus the original ±20% represents a 5% specification relaxation. For trimmer potentiometer applications where fine adjustment compensates for component variation, this difference is typically acceptable. Applications requiring tighter initial tolerance should evaluate circuit sensitivity to the expanded tolerance band.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the TC86F-1-204 and 3306F-1-204 are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting current environmental and handling standards.

Q: Why is the TC86F-1-204 obsolete while the 3306F-1-204 remains active?

A: The TC86 series has been superseded by the 3306 series within Bourns Inc.'s product portfolio. The 3306 series maintains equivalent electrical performance and functionality while offering improved supply availability and ongoing manufacturer support.