TC86F-1-503 Equivalent & Substitute Parts

Part Overview

The TC86F-1-503 is a 50 kOhm 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-1-503

Bourns Inc.In Stock: 884TC86F-1-503 Datasheet

Current PartRFQ

3306F-1-503

Bourns Inc.In Stock: 44403306F-1-503 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC86F-1-503 is determined by the following critical parameters:

• Resistance value: 50 kOhms (exact match required)
• Termination style: PC Pins (exact match required)
• Mounting type: Through Hole (exact match required)
• Adjustment type: Top Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Number of turns: 1 (exact match required)
• Temperature coefficient: ±250ppm/°C (exact match required)

The 3306F-1-503 qualifies as a substitute based on matching all critical electrical and mechanical parameters. While the power rating differs (0.2W versus 0.3W), the substitute maintains functional compatibility within the specified tolerance and environmental operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The 3306F-1-503 is the designated substitute for the obsolete TC86F-1-503. Both components are manufactured by Bourns Inc. and maintain ROHS3 compliance and identical MSL ratings. The substitute is currently in active production status, ensuring availability for procurement and long-term supply chain continuity.

The primary difference between the main part and substitute is the power rating reduction from 0.3W to 0.2W. This difference does not affect functional compatibility when the application circuit operates within the 0.2W power dissipation threshold. The tolerance specification widens from ±20% to ±25% in the substitute; applications requiring tighter tolerance control should evaluate circuit-level impact.

Physical dimensions differ slightly (0.303" versus 0.319" width), but both maintain the same height and PC pin configuration, allowing direct mechanical substitution in standard through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the 3306F-1-503 directly replace the TC86F-1-503 in existing designs?

A: Yes, the 3306F-1-503 is a direct substitute. Both components share identical resistance, termination style, mounting type, adjustment type, resistive material, number of turns, and temperature coefficient. Physical dimensions are compatible with standard through-hole PCB layouts.

Q: What is the impact of the lower power rating on the substitute part?

A: The substitute operates at 0.2W maximum power dissipation compared to the original 0.3W. Applications must ensure circuit design does not exceed 0.2W dissipation. If the original design operates below this threshold, no functional impact occurs.

Q: Does the tolerance difference between ±20% and ±25% affect circuit performance?

A: The wider tolerance of the substitute (±25% versus ±20%) introduces slightly greater resistance variation. Applications with tight tolerance requirements should evaluate whether the additional ±5% variation impacts circuit specifications or performance margins.

Q: Are there any compliance or environmental differences between the parts?

A: Both components are ROHS3 compliant with MSL rating 1 (Unlimited). No compliance or environmental differences exist between the main part and substitute.

Q: What is the physical size difference, and does it matter for PCB layout?

A: The substitute is 0.016" (0.40mm) wider (0.319" versus 0.303"). Both maintain identical height and PC pin spacing. Standard through-hole PCB layouts accommodate this minor width difference without modification.