TC86K-1-105 Equivalent & Substitute Parts

Part Overview

The TC86K-1-105 is a 1 MOhm, 0.3W through-hole trimmer potentiometer manufactured by Bourns Inc. as part of the Trimpot® TC86 series. This component features cermet resistive material, side adjustment capability, and PC pin termination for through-hole mounting applications. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and component procurement.

Substiute Parts

TC86K-1-105

Bourns Inc.In Stock: 840TC86K-1-105 Datasheet

Current PartRFQ

3306K-1-105

Bourns Inc.In Stock: 9513306K-1-105 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3306K-1-105 qualifies as a functional substitute for the TC86K-1-105 based on the following critical parameters:

Matching Parameters:

• Resistance value: 1 MOhms (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: 0.3W (TC86K-1-105) vs. 0.2W/1/5W (3306K-1-105)
• Tolerance: ±20% (TC86K-1-105) vs. ±25% (3306K-1-105)
• Physical dimensions: 0.303" x 0.268" (TC86K-1-105) vs. 0.268" x 0.319" (3306K-1-105)
• Product status: Obsolete (TC86K-1-105) vs. Active (3306K-1-105)

The 3306K-1-105 is suitable for applications where the lower power rating (0.2W) and slightly relaxed tolerance (±25%) are acceptable within circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

The 3306K-1-105 is the designated substitute for the obsolete TC86K-1-105. Both components are manufactured by Bourns Inc. and maintain identical electrical characteristics for resistance, temperature coefficient, and adjustment functionality. The 3306K-1-105 carries active product status, ensuring ongoing availability and supply chain continuity.

Selection of the 3306K-1-105 requires verification that the application circuit tolerates the reduced power rating (0.2W versus 0.3W) and the wider tolerance specification (±25% versus ±20%). Both components maintain ROHS3 compliance and unlimited moisture sensitivity ratings, supporting equivalent environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 3306K-1-105 directly replace the TC86K-1-105 in existing designs?

A: Direct replacement is possible when circuit design margins accommodate the lower power rating (0.2W) and wider tolerance (±25%). The identical resistance value, temperature coefficient, adjustment type, and termination style ensure functional compatibility in most applications. Physical dimensions differ slightly; verify PCB layout clearances before implementation.

Q: What is the primary reason for substitution?

A: The TC86K-1-105 is obsolete. The 3306K-1-105 provides an active, in-stock alternative from the same manufacturer with matching core electrical specifications.

Q: Are there compliance differences between these parts?

A: Both components are ROHS3 compliant with unlimited MSL ratings. No compliance barriers exist for substitution.

Q: How do the power ratings affect component selection?

A: The TC86K-1-105 is rated for 0.3W while the 3306K-1-105 is rated for 0.2W. Applications operating near the original 0.3W specification require thermal analysis to confirm the substitute operates within safe dissipation limits.

Q: Do tolerance differences impact circuit performance?

A: The TC86K-1-105 specifies ±20% tolerance while the 3306K-1-105 specifies ±25%. Applications with tight tolerance requirements must evaluate whether the wider specification affects circuit performance or calibration procedures.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Dimensions differ: TC86K-1-105 is 0.303" x 0.268" while 3306K-1-105 is 0.268" x 0.319". Verify PCB footprint and mounting clearances before design implementation.