TC89P-1-503 Equivalent & Substitute Parts

Part Overview

The TC89P-1-503 is a 50 kOhm, 0.5W through-hole trimmer potentiometer manufactured by Bourns Inc. as part of the Trimpot® TC89 open frame series. This component features cermet resistive material, PC pin termination, and top adjustment capability with a single turn design. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and legacy equipment repair.

Substiute Parts

TC89P-1-503

Bourns Inc.In Stock: 1162TC89P-1-503 Datasheet

Current PartRFQ

409HA503M

TE Connectivity Passive ProductIn Stock: 940409HA503M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC89P-1-503 is determined by strict equivalence across the following critical parameters:

• Resistance value: 50 kOhms (exact match required)
• Power rating: 0.5W minimum
• Tolerance: ±20% or better
• Temperature coefficient: ±250ppm/°C or better
• Number of turns: 1 turn
• Resistive material: Cermet
• Mounting type: Through hole
• Termination style: PC pins
• Physical dimensions: 11.50mm x 8.80mm face
• Environmental compliance: ROHS3 compliant minimum

The TE Connectivity 409HA503M meets all substitution criteria. While this part offers top and bottom adjustment capability compared to the TC89P-1-503's top-only adjustment, this represents an enhancement rather than a limitation, as the additional adjustment access does not compromise compatibility in applications requiring only top adjustment.

Parameter Comparison

Engineering Selection Recommendations

The TC89P-1-503 is classified as obsolete. The TE Connectivity 409HA503M is an active product that satisfies all electrical and mechanical parameters required for direct substitution. Both components maintain ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring compatibility with current manufacturing and environmental standards. The 409HA503M is currently available in inventory (875 pcs), whereas the TC89P-1-503 stock is limited (1108 pcs). For new designs or system refreshes, the 409HA503M is the appropriate selection. For legacy equipment requiring exact form-factor and adjustment-method matching, the TC89P-1-503 remains available while stock permits.

Frequently Asked Questions (FAQ)

Q: Can the 409HA503M replace the TC89P-1-503 in existing circuit boards?

A: Yes. Both components share identical electrical specifications (50 kOhms, 0.5W, ±20% tolerance, ±250ppm/°C), resistive material (cermet), mounting type (through hole), termination style (PC pins), and physical dimensions (11.50mm x 8.80mm). The 409HA503M's additional bottom adjustment access does not affect compatibility.

Q: What is the significance of the adjustment type difference?

A: The TC89P-1-503 provides top adjustment only, while the 409HA503M provides both top and bottom adjustment. In applications where only top adjustment is required, both parts function identically. The additional bottom adjustment on the 409HA503M does not introduce incompatibility.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity). No compliance barriers exist for substitution.

Q: What is the inventory status for each part?

A: The TC89P-1-503 has 1108 pcs in stock (obsolete status). The 409HA503M has 875 pcs in stock (active status). For long-term availability, the 409HA503M is the recommended choice.

Q: Are the physical dimensions identical?

A: Yes. Both components have a rectangular face measuring 0.453" x 0.346" (11.50mm x 8.80mm), ensuring identical PCB footprint compatibility.