3303C-1-502E Equivalent & Substitute Parts

Part Overview

The Bourns 3303C-1-502E is a 5 kOhms surface mount trimmer potentiometer with 0.15W power rating, cermet resistive material, and 1.0 turn adjustment capability. This component belongs to the Trimpot® 3303 series and features top and bottom adjustment access. The part is currently obsolete, making identification of suitable alternatives necessary for ongoing design support and production continuity.

Substiute Parts

3303C-1-502E

Bourns Inc.In Stock: 11183303C-1-502E Datasheet

Current PartRFQ

TC42X-2-502E

Bourns Inc.In Stock: 16615TC42X-2-502E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3303C-1-502E is determined by the following critical parameters:

• Resistance value: 5 kOhms (exact match required)
• Resistive material: Cermet (maintains performance characteristics)
• Termination style: J Lead (ensures PCB compatibility)
• Mounting type: Surface Mount (preserves assembly process)
• Number of turns: 1 (functional equivalence)
• Temperature coefficient: ±250ppm/°C (thermal stability requirement)
• Tolerance: ±25% (acceptable variance specification)

The TC42X-2-502E meets these core substitution criteria. While power rating differs (0.1W versus 0.15W), adjustment access is reduced (top only versus top and bottom), and physical dimensions are smaller, the electrical parameters and functional specifications align with substitution requirements for this product category.

Parameter Comparison

Engineering Selection Recommendations

The TC42X-2-502E is an active production substitute for the obsolete 3303C-1-502E. Both components share identical resistance, tolerance, temperature coefficient, and resistive material specifications. Both maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility.

The TC42X-2-502E operates at reduced power dissipation (0.1W versus 0.15W) and features a smaller footprint. These characteristics are acceptable for applications where the original 0.15W rating provides design margin. The TC42X series adjustment access is limited to top-only operation, whereas the 3303C series provides top and bottom access. This difference requires evaluation based on specific assembly and maintenance requirements.

Frequently Asked Questions (FAQ)

Q: Can the TC42X-2-502E directly replace the 3303C-1-502E in all applications?

A: Electrical substitution is valid based on matching resistance, tolerance, temperature coefficient, and cermet material. Physical footprint reduction and adjustment access limitation require design verification for specific applications.

Q: What is the significance of the power rating difference (0.15W versus 0.1W)?

A: The 3303C-1-502E is rated for 0.15W dissipation, while the TC42X-2-502E is rated for 0.1W. Substitution is appropriate when circuit design ensures power dissipation remains within the 0.1W limit of the TC42X series.

Q: Does the smaller physical size of the TC42X-2-502E affect PCB layout compatibility?

A: The TC42X-2-502E footprint is smaller (2.60mm x 2.20mm versus 3.75mm x 3.00mm). PCB layout must accommodate the reduced dimensions. J Lead termination style remains consistent between both parts.

Q: Are both parts compliant with current regulatory requirements?

A: Both the 3303C-1-502E and TC42X-2-502E are ROHS3 compliant and carry MSL 1 rating. The TC42X-2-502E is in active production status, ensuring ongoing availability and regulatory support.

Q: What is the impact of top-only adjustment versus top and bottom adjustment?

A: The 3303C-1-502E provides adjustment access from both top and bottom surfaces. The TC42X-2-502E provides top-only access. Assembly and field adjustment procedures must be evaluated for compatibility with this functional difference.