TC86F-1-203 Equivalent & Substitute Parts

Part Overview

The TC86F-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, cermet resistive material, and 0.3W power rating with top adjustment capability. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

TC86F-1-203

Bourns Inc.In Stock: 861TC86F-1-203 Datasheet

Current PartRFQ

3306F-1-203

Bourns Inc.In Stock: 49683306F-1-203 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3306F-1-203 qualifies as a functional substitute for the TC86F-1-203 based on the following critical parameters:

• Resistance Value: Both components are rated at 20 kOhms
• Termination Style: Both use PC pins for through-hole mounting
• Adjustment Type: Both feature top adjustment
• Resistive Material: Both utilize cermet construction
• Temperature Coefficient: Both maintain ±250ppm/°C stability
• Number of Turns: Both are single-turn potentiometers
• Compliance: Both are ROHS3 compliant with MSL 1 rating

The primary differences are power rating (0.3W vs. 0.2W) and tolerance specification (±20% vs. ±25%), along with minor dimensional variation (0.303" x 0.268" vs. 0.319" x 0.268" face dimensions).

Parameter Comparison

Engineering Selection Recommendations

The 3306F-1-203 is the designated substitute for the obsolete TC86F-1-203. Both components are manufactured by Bourns Inc. and maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99 classification). The 3306F-1-203 is currently in active production status, ensuring long-term availability for replacement and new applications.

When selecting the 3306F-1-203 as a substitute, verify that the application circuit can accommodate the lower power rating (0.2W vs. 0.3W) and the relaxed tolerance specification (±25% vs. ±20%). The minor dimensional increase (0.016" width difference) must be evaluated against available PCB layout space. Both components share identical electrical performance characteristics in terms of temperature coefficient and resistive material properties.

Frequently Asked Questions (FAQ)

Q: Can the 3306F-1-203 directly replace the TC86F-1-203 in existing designs?

A: The 3306F-1-203 is functionally compatible for applications where the 0.2W power rating is sufficient. Verify that your circuit does not require the higher 0.3W dissipation capability of the original TC86F-1-203. The ±25% tolerance of the 3306F-1-203 is acceptable for most trimmer potentiometer applications; however, if your design requires the tighter ±20% tolerance, additional circuit compensation may be necessary.

Q: What are the dimensional considerations for substitution?

A: The 3306F-1-203 has a slightly wider face dimension (0.319" vs. 0.303"), representing a 0.016" increase in width. Confirm that your PCB layout accommodates this dimensional difference. Both components maintain identical height (0.268") and use identical PC pin termination, so vertical clearance and solder pad spacing remain unchanged.

Q: Are both components RoHS compliant?

A: Yes. Both the TC86F-1-203 and 3306F-1-203 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both are REACH Unaffected and classified under ECCN EAR99 for export purposes.

Q: Why is the TC86F-1-203 obsolete?

A: The TC86F-1-203 has been discontinued by Bourns Inc. The 3306F-1-203, part of the active Trimpot® 3306 series, represents the current production alternative for 20 kOhms trimmer potentiometer applications with PC pin termination and top adjustment.

Q: Are there any performance differences between the two components?

A: Both components share identical temperature coefficient (±250ppm/°C), resistive material (cermet), and adjustment characteristics (1-turn, top adjustment). The primary differences are power rating and tolerance specification. The temperature stability and long-term reliability characteristics are equivalent for both components.