TC89P-1-203 Equivalent & Substitute Parts

Part Overview

The TC89P-1-203 is a 20 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-1-203

Bourns Inc.In Stock: 829TC89P-1-203 Datasheet

Current PartRFQ

409HA203M

TE Connectivity Passive ProductIn Stock: 1002409HA203M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC89P-1-203 is determined by strict equivalence across the following critical parameters:

• Resistance value: 20 kOhms (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Tolerance: ±20% (exact match required)
• Temperature coefficient: ±250ppm/°C (exact match required)
• Number of turns: 1 (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Through hole (exact match required)
• Termination style: PC pins (exact match required)
• Physical dimensions: Rectangular 0.453" x 0.346" face / 11.50mm x 8.80mm (exact match required)

The TE Connectivity 409HA203M meets all substitution criteria. While this part offers both top and bottom adjustment capability compared to the TC89P-1-203's top-only adjustment, the additional adjustment option does not compromise functional equivalence in applications requiring top adjustment only. Both parts maintain identical electrical specifications, physical footprint, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 409HA203M (Citec series) is the qualified substitute for the obsolete TC89P-1-203. Selection is based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly, including resistance, power rating, tolerance, and temperature coefficient. The parts are functionally interchangeable in circuit applications.

Physical Compatibility: Identical footprint and PC pin termination ensure direct board-level substitution without layout modification.

Compliance Status: Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying environmental and moisture sensitivity requirements.

Product Availability: The 409HA203M is currently in active production status with confirmed inventory availability, providing supply chain continuity for legacy system support and new production runs.

Adjustment Capability: The 409HA203M's dual adjustment option (top and bottom) provides operational flexibility while maintaining full compatibility with applications designed for top adjustment only.

Frequently Asked Questions (FAQ)

Q: Can the 409HA203M directly replace the TC89P-1-203 without circuit modification?

A: Yes. The 409HA203M meets all electrical and physical specifications of the TC89P-1-203. Direct substitution is possible without circuit redesign or board layout changes.

Q: What is the significance of the adjustment type difference (top only vs. top and bottom)?

A: The TC89P-1-203 provides top adjustment only, while the 409HA203M offers both top and bottom adjustment. This difference does not affect substitution compatibility. Applications using top adjustment will function identically with the 409HA203M.

Q: Are there compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant with MSL 1 rating. No compliance barriers exist for substitution.

Q: What is the physical footprint compatibility?

A: Both parts share identical rectangular dimensions of 0.453" x 0.346" face (11.50mm x 8.80mm) and PC pin termination. Board-level compatibility is confirmed.

Q: Why is the TC89P-1-203 obsolete?

A: The TC89P-1-203 is listed as obsolete by the manufacturer. The 409HA203M represents the current active alternative for this resistance and power rating combination.

Q: Are there inventory considerations for the substitute part?

A: The 409HA203M is in active production with confirmed new original stock availability, ensuring supply continuity for both legacy support and new applications.