TC86F-1-502 Equivalent & Substitute Parts

Part Overview

The TC86F-1-502 is a 5 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 0.3W power rating. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

TC86F-1-502

Bourns Inc.In Stock: 1196TC86F-1-502 Datasheet

Current PartRFQ

3306F-1-502

Bourns Inc.In Stock: 78923306F-1-502 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3306F-1-502 qualifies as a substitute for the TC86F-1-502 based on the following alignment of critical parameters:

• Resistance value: Both rated at 5 kOhms
• Temperature coefficient: Both ±250ppm/°C
• Number of turns: Both single-turn (1 turn)
• Adjustment type: Both top adjustment
• Resistive material: Both cermet
• Mounting type: Both through hole
• Termination style: Both PC pins
• Compliance: Both ROHS3 compliant, REACH unaffected, EAR99 classified

The primary difference is power rating: the substitute operates at 0.2W (1/5W) versus the original 0.3W specification. This represents a reduction in maximum dissipation capacity. Additionally, tolerance widens from ±20% to ±25%, and physical dimensions show minor variation (0.319" x 0.268" versus 0.303" x 0.268" face).

Parameter Comparison

Engineering Selection Recommendations

The 3306F-1-502 is an active product with established supply availability, making it suitable for applications where the TC86F-1-502 is no longer procurable. Selection of this substitute requires verification that circuit design accommodates the reduced power rating of 0.2W and the widened tolerance of ±25%. Both components maintain identical temperature coefficient performance and comply with ROHS3 and REACH requirements. The minor increase in face width (0.016" / 0.40mm) must be evaluated against available PCB layout space. Both components are classified as MSL 1 with unlimited moisture sensitivity, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can the 3306F-1-502 directly replace the TC86F-1-502 in all applications?

A: Direct replacement is possible only when circuit design permits operation at 0.2W power dissipation and accepts ±25% tolerance. If the original design requires 0.3W capability or tighter ±20% tolerance, substitution requires circuit re-evaluation.

Q: What is the significance of the power rating difference?

A: Power rating defines maximum continuous power dissipation. The TC86F-1-502 supports 0.3W; the 3306F-1-502 supports 0.2W. Applications operating near the original 0.3W limit may exceed the substitute's thermal capability.

Q: Are there physical compatibility concerns?

A: The substitute is 0.016" (0.40mm) wider in face dimension. PCB layout must accommodate this increase. Both components use identical PC pin termination and through-hole mounting, so hole spacing remains compatible.

Q: Do both components meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both carry MSL 1 rating with unlimited moisture sensitivity.

Q: Why is the TC86F-1-502 obsolete?

A: Product obsolescence is determined by the manufacturer. The active 3306F-1-502 from the same manufacturer provides functional equivalence for most applications requiring 5 kOhms trimmer potentiometer capability.