TC33B-1-502E Equivalent & Substitute Parts

Part Overview

The TC33B-1-502E is a 5 kOhms surface mount trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC33 - Open Frame series. This component features 0.1W power rating, J Lead termination, and bottom adjustment capability with cermet resistive material. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

TC33B-1-502E

Bourns Inc.In Stock: 1054TC33B-1-502E Datasheet

Current PartRFQ

3314R-1-502E

Bourns Inc.In Stock: 17763314R-1-502E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC33B-1-502E is determined by the following critical parameters:

• Resistance value: 5 kOhms (exact match required)
• Resistive material: Cermet (maintains performance characteristics)
• Mounting type: Surface Mount (PCB compatibility)
• Adjustment type: Bottom Adjustment (functional requirement)
• Number of turns: 1 (operational specification)
• Regulatory compliance: ROHS3 and REACH status

The 3314R-1-502E qualifies as a substitute based on matching resistance, cermet material, surface mount configuration, bottom adjustment capability, and single-turn specification. Differences in power rating, tolerance, temperature coefficient, termination style, and physical dimensions are secondary considerations that do not prevent functional substitution when circuit requirements permit.

Parameter Comparison

Engineering Selection Recommendations

The 3314R-1-502E is an active product with current manufacturing support, addressing the obsolescence status of the TC33B-1-502E. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The 3314R-1-502E provides improved specifications in tolerance (±20% versus ±25%) and temperature coefficient (±100ppm/°C versus ±250ppm/°C), resulting in enhanced stability and precision. The higher power rating (0.25W versus 0.1W) offers additional thermal margin in applications.

Physical differences include termination style (Gull Wing versus J Lead) and footprint dimensions (square 4.50mm versus rectangular 3.80mm x 3.60mm). PCB layout modifications are required to accommodate the larger footprint and different lead configuration. The Gull Wing termination provides improved solder joint reliability compared to J Lead configuration.

Frequently Asked Questions (FAQ)

Q: Can the 3314R-1-502E directly replace the TC33B-1-502E without PCB modification?

A: No. The 3314R-1-502E uses Gull Wing termination and a larger square footprint (4.50mm x 4.50mm) compared to the TC33B-1-502E J Lead rectangular footprint (3.80mm x 3.60mm). PCB layout redesign is required.

Q: Are the resistance values identical between these components?

A: Yes. Both components are rated at 5 kOhms with cermet resistive material and single-turn bottom adjustment configuration.

Q: What are the tolerance differences, and do they affect circuit performance?

A: The 3314R-1-502E has ±20% tolerance versus ±25% for the TC33B-1-502E. The improved tolerance of the substitute provides tighter resistance control. Circuit impact depends on application sensitivity to resistance variation.

Q: Does the higher power rating of the 3314R-1-502E create any compatibility issues?

A: No. The 0.25W rating of the 3314R-1-502E is a superset of the 0.1W requirement. Higher power rating provides additional thermal capacity without negative effects in applications designed for lower power dissipation.

Q: Are both components compliant with current regulatory standards?

A: Yes. Both the TC33B-1-502E and 3314R-1-502E are ROHS3 compliant and REACH unaffected. The 3314R-1-502E maintains active product status with ongoing compliance support.

Q: What is the significance of the temperature coefficient difference?

A: The 3314R-1-502E temperature coefficient of ±100ppm/°C is superior to the TC33B-1-502E at ±250ppm/°C. This means the substitute exhibits less resistance drift across temperature variations, improving circuit stability in temperature-sensitive applications.