TC86F-1-105 Equivalent & Substitute Parts

Part Overview

The TC86F-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, top adjustment, and PC pin termination for through-hole mounting applications. The TC86F-1-105 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing production support and design continuity.

Substiute Parts

TC86F-1-105

Bourns Inc.In Stock: 832TC86F-1-105 Datasheet

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3306F-1-105

Bourns Inc.In Stock: 39713306F-1-105 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC86F-1-105 is determined by the following critical parameters:

• Resistance Value: 1 MOhm (exact match required)
• Resistive Material: Cermet (maintains performance characteristics)
• Termination Style: PC Pins (ensures PCB compatibility)
• Mounting Type: Through Hole (preserves board layout compatibility)
• Adjustment Type: Top Adjustment (maintains user interface consistency)
• Number of Turns: 1 Turn (functional equivalence)
• Temperature Coefficient: ±250ppm/°C (thermal stability requirement)

The 3306F-1-105 qualifies as a substitute based on matching all critical parameters. Variations in power rating (0.2W vs. 0.3W), tolerance (±25% vs. ±20%), and physical dimensions (8.10mm x 6.80mm vs. 7.70mm x 6.80mm) are within acceptable substitution criteria for this component category, provided the application power dissipation does not exceed the substitute's 0.2W rating.

Parameter Comparison

Engineering Selection Recommendations

The 3306F-1-105 is the designated substitute for the obsolete TC86F-1-105. Both components are manufactured by Bourns Inc. and maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99 ECCN classification). The 3306F-1-105 is currently in active production status, ensuring long-term availability and supply chain continuity.

Selection of the 3306F-1-105 requires verification that circuit power dissipation does not exceed 0.2W, as this represents the primary electrical difference from the original TC86F-1-105. The slight increase in physical width (8.10mm vs. 7.70mm) must be evaluated against available PCB layout space. Both components share identical MSL ratings, eliminating moisture sensitivity considerations during substitution.

Frequently Asked Questions (FAQ)

Q: Can the 3306F-1-105 directly replace the TC86F-1-105 in existing designs?

A: Direct replacement is possible when circuit power dissipation remains below 0.2W. The 3306F-1-105 has a lower power rating (0.2W vs. 0.3W) and slightly larger physical dimensions (8.10mm vs. 7.70mm width). PCB layout space must accommodate the increased width.

Q: What are the tolerance differences between these parts?

A: The TC86F-1-105 specifies ±20% tolerance, while the 3306F-1-105 specifies ±25% tolerance. Applications requiring tighter tolerance control should account for this 5% difference in acceptable resistance variation.

Q: Are both parts RoHS compliant?

A: Yes. Both the TC86F-1-105 and 3306F-1-105 are ROHS3 compliant with MSL rating 1 (Unlimited), making them suitable for lead-free manufacturing processes without moisture sensitivity restrictions.

Q: Why is the TC86F-1-105 obsolete?

A: The TC86F-1-105 has been discontinued by Bourns Inc. The 3306F-1-105 from the active Trimpot® 3306 series provides functional equivalence with current production availability.

Q: Are there any electrical performance differences?

A: Both components share identical resistance value (1 MOhm), temperature coefficient (±250ppm/°C), number of turns (1), and adjustment type (top adjustment). The primary differences are power rating and tolerance specification.