TC73X-1-502E Equivalent & Substitute Parts

Part Overview

The TC73X-1-502E is a 5 kOhm surface mount trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC73 closed frame series. This component features 0.05W power rating, carbon resistive material, J lead termination, and top adjustment capability with 1.0 turn operation. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

TC73X-1-502E

Bourns Inc.In Stock: 887TC73X-1-502E Datasheet

Current PartRFQ

TC33X-2-502E

Bourns Inc.In Stock: 95341TC33X-2-502E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC73X-1-502E is based on maintaining electrical and mechanical compatibility across the following critical parameters:

• Resistance value: 5 kOhms (exact match required)
• Termination style: J Lead (mechanical fit requirement)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Adjustment type: Top Adjustment (operational interface)
• Number of turns: 1.0 (functional equivalence)
• Temperature coefficient: ±250ppm/°C (thermal stability match)

The TC33X-2-502E qualifies as a direct substitute based on matching all critical parameters. While the TC33X series uses cermet resistive material versus the carbon material of the TC73X, and features increased power rating (0.1W versus 0.05W) and improved tolerance (±25% versus ±30%), these differences represent functional enhancements rather than incompatibilities. The TC33X-2-502E maintains identical resistance, termination, mounting, adjustment, and turn specifications.

Parameter Comparison

Engineering Selection Recommendations

The TC33X-2-502E is the designated substitute for the obsolete TC73X-1-502E. Selection of this substitute is supported by the following factors:

• Both components are manufactured by Bourns Inc., ensuring consistent design and quality standards
• Electrical parameters (resistance, temperature coefficient, number of turns) are identical
• Mechanical compatibility is maintained through matching J lead termination and surface mount configuration
• The TC33X-2-502E holds active product status with established supply chain availability, addressing the obsolescence of the TC73X-1-502E
• Both components maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility
• The TC33X-2-502E provides enhanced specifications (higher power rating and tighter tolerance) that support broader application flexibility without introducing incompatibility

Frequently Asked Questions (FAQ)

Q: Can the TC33X-2-502E be used as a direct replacement for the TC73X-1-502E in existing designs?

A: Yes. The TC33X-2-502E maintains identical resistance (5 kOhms), termination style (J Lead), mounting type (surface mount), adjustment type (top adjustment), number of turns (1.0), and temperature coefficient (±250ppm/°C). The substitute is mechanically and electrically compatible with the original component.

Q: What are the differences between the TC73X-1-502E and TC33X-2-502E?

A: The primary differences are resistive material (carbon versus cermet), power rating (0.05W versus 0.1W), tolerance (±30% versus ±25%), and physical dimensions (0.142" x 0.122" versus 0.150" x 0.142" face). The TC33X-2-502E represents an enhanced specification variant. The TC73X-1-502E is obsolete; the TC33X-2-502E is active production.

Q: Will the slightly larger size of the TC33X-2-502E affect PCB layout?

A: The TC33X-2-502E dimensions are 0.150" x 0.142" face (3.80mm x 3.60mm) compared to the TC73X-1-502E at 0.142" x 0.122" face (3.60mm x 3.10mm). PCB footprint compatibility must be verified for the specific application. Consult the respective component datasheets for detailed dimensional specifications and land pattern requirements.

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

A: Both components are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity rating, and are REACH unaffected. No compliance or certification barriers exist for substitution.

Q: Why is the TC73X-1-502E obsolete?

A: The TC73X-1-502E is listed as obsolete product status. The TC33X-2-502E from the active Trimpot® TC33 series provides equivalent functionality with enhanced specifications and ongoing manufacturing support.