TC89P-1-105 Equivalent & Substitute Parts

Part Overview

The TC89P-1-105 is a 1 MOhm, 0.5W through-hole trimmer potentiometer manufactured by Bourns Inc. under the Trimpot® TC89 series. This component features cermet resistive material, PC pin termination, and top adjustment capability in a rectangular form factor (11.50mm x 8.80mm). The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

TC89P-1-105

Bourns Inc.In Stock: 1134TC89P-1-105 Datasheet

Current PartRFQ

409HA105M

TE Connectivity Passive ProductIn Stock: 680409HA105M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC89P-1-105 is determined by strict equivalence across the following critical parameters:

• Electrical Specifications: Resistance value (1 MOhm), power rating (0.5W), tolerance (±20%), and temperature coefficient (±250ppm/°C) must match exactly
• Physical Form Factor: Rectangular dimensions (11.50mm x 8.80mm) and through-hole mounting type ensure mechanical compatibility
• Termination & Material: PC pin termination and cermet resistive material maintain circuit interface compatibility
• Adjustment Configuration: Single-turn (1 turn) adjustment capability is required for functional equivalence
• Regulatory Compliance: ROHS3 compliance and MSL 1 rating ensure environmental and handling compatibility

The substitute part 409HA105M from TE Connectivity meets all these criteria. The primary distinction is adjustment type: the TC89P-1-105 provides top adjustment only, while the 409HA105M provides both top and bottom adjustment. This difference does not prevent substitution, as top adjustment functionality is preserved.

Parameter Comparison

Engineering Selection Recommendations

The 409HA105M from TE Connectivity Passive Product is a direct functional equivalent for the obsolete TC89P-1-105. Both components are ROHS3 compliant and carry MSL 1 rating, ensuring regulatory and environmental compatibility. The 409HA105M is currently in active production status with confirmed inventory availability (661 pcs), providing supply continuity for legacy system support and repair applications.

The adjustment type difference (top-only versus top-and-bottom) does not compromise substitution suitability. The 409HA105M retains full top adjustment functionality required by the original design while offering additional bottom adjustment capability. This represents a compatible enhancement rather than a functional limitation.

Frequently Asked Questions (FAQ)

Q: Can the 409HA105M be used as a direct replacement for the TC89P-1-105 in existing circuit boards?

A: Yes. Both components share identical electrical specifications (1 MOhm, 0.5W, ±20% tolerance, ±250ppm/°C), physical dimensions (11.50mm x 8.80mm), and PC pin termination. The through-hole mounting footprint is identical, enabling direct PCB substitution without layout modification.

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

A: The TC89P-1-105 provides top adjustment only, while the 409HA105M provides both top and bottom adjustment. This difference does not prevent substitution. The 409HA105M retains the required top adjustment functionality. The additional bottom adjustment access does not interfere with circuit operation or mechanical fit.

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

A: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. No compliance barriers exist for substitution. The 409HA105M's active product status ensures ongoing availability and support compared to the obsolete TC89P-1-105.

Q: What inventory considerations apply to this substitution?

A: The TC89P-1-105 is obsolete with limited remaining stock (1089 pcs reported). The 409HA105M is in active production with confirmed availability (661 pcs). For new designs or ongoing production, the 409HA105M is the recommended selection to ensure supply continuity.

Q: Are there any mechanical fit concerns when substituting these components?

A: No. Both components are rectangular through-hole trimmers with identical face dimensions (0.453" x 0.346" / 11.50mm x 8.80mm). PC pin termination and spacing are equivalent, ensuring mechanical compatibility without modification to mounting hardware or PCB layout.