TC86W-1-503 Equivalent & Substitute Parts

Part Overview

The TC86W-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, side adjustment, and a 0.3W power rating with cermet resistive material. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and legacy system support. Equivalent parts must maintain the same resistance value, adjustment type, mounting configuration, and electrical performance characteristics.

Substiute Parts

TC86W-1-503

Bourns Inc.In Stock: 1184TC86W-1-503 Datasheet

Current PartRFQ

3306W-1-503

Bourns Inc.In Stock: 22973306W-1-503 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC86W-1-503 is determined by the following critical parameters:

• Resistance Value: Must be 50 kOhms
• Adjustment Type: Must be side adjustment
• Mounting Configuration: Must be through-hole with PC pin termination
• Resistive Material: Must be cermet
• Number of Turns: Must be 1 turn
• Temperature Coefficient: Must be ±250ppm/°C
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The 3306W-1-503 qualifies as a substitute based on these parameters. While the power rating differs (0.2W versus 0.3W), the 3306W-1-503 maintains all critical electrical and mechanical specifications required for functional equivalence in applications where the lower power rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The 3306W-1-503 is the qualified substitute for the obsolete TC86W-1-503. Selection should be based on the following criteria:

Power Dissipation Requirements: The 3306W-1-503 has a 0.2W power rating compared to the original 0.3W. Verify that circuit power dissipation does not exceed 0.2W at maximum operating conditions. If the application requires the full 0.3W capability, the 3306W-1-503 is not suitable.

Tolerance Specifications: The 3306W-1-503 carries a ±25% tolerance versus the original ±20%. Applications requiring tighter tolerance control should evaluate whether the wider tolerance is acceptable for circuit performance.

Availability and Compliance: The 3306W-1-503 is in active production with ROHS3 compliance and unlimited MSL rating, ensuring long-term availability and regulatory compliance for new designs and legacy system support.

Physical Fit: Both components are rectangular through-hole designs with PC pin termination. Minor dimensional differences exist (0.303" x 0.268" versus 0.268" x 0.319"), but both fit standard PCB layouts designed for side-adjustment trimmer potentiometers.

Frequently Asked Questions (FAQ)

Q: Can the 3306W-1-503 directly replace the TC86W-1-503 in all applications?

A: The 3306W-1-503 is functionally equivalent for applications where power dissipation does not exceed 0.2W. If the original design requires 0.3W capability, alternative substitutes must be evaluated. The wider tolerance (±25% versus ±20%) may affect circuit performance in precision applications.

Q: What is the primary reason for substitution?

A: The TC86W-1-503 is obsolete. The 3306W-1-503 maintains all critical electrical and mechanical specifications while being in active production, ensuring component availability for repairs and legacy system support.

Q: Are there dimensional compatibility concerns?

A: Both components are through-hole trimmer potentiometers with side adjustment and PC pin termination. Minor dimensional variations exist, but both fit standard PCB footprints designed for this component category. Verify PCB layout clearances if space is constrained.

Q: Does the substitute meet compliance requirements?

A: Yes. The 3306W-1-503 is ROHS3 compliant with MSL 1 (unlimited) rating, matching the compliance profile of the original TC86W-1-503.

Q: What parameters must match for substitution to be valid?

A: Resistance value (50 kOhms), adjustment type (side adjustment), mounting configuration (through-hole PC pins), resistive material (cermet), number of turns (1), and temperature coefficient (±250ppm/°C) must all match. Power rating and tolerance may vary within acceptable limits depending on application requirements.