TC86P-1-503 Equivalent & Substitute Parts

Part Overview

The TC86P-1-503 is a 50 kOhm trimmer potentiometer manufactured by Bourns Inc. as 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 compatible substitute components essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

TC86P-1-503

Bourns Inc.In Stock: 1146TC86P-1-503 Datasheet

Current PartRFQ

3306P-1-503

Bourns Inc.In Stock: 21983306P-1-503 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3306P-1-503 qualifies as a substitute for the TC86P-1-503 based on the following critical parameters:

Matching Parameters:

• Resistance value: 50 kOhms (identical)
• Temperature coefficient: ±250ppm/°C (identical)
• Number of turns: 1 (identical)
• Adjustment type: Top 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)

Allowable Variations:

• Power rating: 0.3W (main) vs. 0.2W/1/5W (substitute) — The substitute has lower power dissipation capacity
• Tolerance: ±20% (main) vs. ±25% (substitute) — The substitute has wider tolerance
• Physical dimensions: 7.70mm x 6.80mm (main) vs. 8.10mm x 6.80mm (substitute) — Minimal dimensional difference in one axis
• Product status: Obsolete (main) vs. Active (substitute) — The substitute is currently in production

Parameter Comparison

Engineering Selection Recommendations

The 3306P-1-503 is suitable as a substitute for the obsolete TC86P-1-503 in applications where the following conditions are met:

Electrical Compatibility: The substitute maintains identical resistance, temperature coefficient, and adjustment characteristics. Both components are cermet-based, single-turn trimmer potentiometers with top adjustment and PC pin termination.

Power Dissipation Consideration: The substitute has a lower power rating (0.2W vs. 0.3W). Substitution is appropriate only in circuits where the actual power dissipation does not exceed 0.2W. Applications requiring the full 0.3W capacity require alternative sourcing.

Tolerance Impact: The substitute has a wider tolerance specification (±25% vs. ±20%). In precision applications where the tighter tolerance of the original component is critical, this difference must be evaluated against circuit requirements.

Physical Fit: The substitute is 0.4mm wider (8.10mm vs. 7.70mm) in one dimension. PCB layout and mechanical clearance must be verified before substitution.

Compliance and Availability: Both components maintain ROHS3 compliance and unlimited MSL rating. The substitute is currently in active production, ensuring long-term availability compared to the obsolete original.

Frequently Asked Questions (FAQ)

Q: Can the 3306P-1-503 directly replace the TC86P-1-503 in all applications?

A: Direct replacement is possible only when circuit power dissipation does not exceed 0.2W and PCB layout accommodates the 0.4mm width increase. Tolerance differences (±25% vs. ±20%) must be acceptable for the application.

Q: What is the primary difference between these two components?

A: The main differences are power rating (0.3W vs. 0.2W), tolerance (±20% vs. ±25%), and physical dimensions (7.70mm vs. 8.10mm width). All other electrical and mechanical parameters are identical.

Q: Are both components RoHS compliant?

A: Yes, both the TC86P-1-503 and 3306P-1-503 are ROHS3 compliant with unlimited MSL rating.

Q: What should I verify before substituting the 3306P-1-503?

A: Verify that circuit power dissipation remains below 0.2W, confirm PCB layout accommodates the slightly larger footprint, and assess whether the ±25% tolerance meets circuit specifications.

Q: Why is the TC86P-1-503 obsolete?

A: The TC86 series has been superseded by the 3306 series. The 3306P-1-503 represents the current production equivalent within the Bourns Trimpot® product line.

Q: Is the 3306P-1-503 available in stock?

A: Yes, the 3306P-1-503 is an active product with current inventory availability, unlike the obsolete TC86P-1-503.