TC33B-1-102E Equivalent & Substitute Parts

Part Overview

The TC33B-1-102E is a 1 kOhms surface mount trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC33 - Open Frame series. This component features a 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-1-102E

Bourns Inc.In Stock: 742TC33B-1-102E Datasheet

Current PartRFQ

3314R-1-102E

Bourns Inc.In Stock: 44553314R-1-102E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC33B-1-102E is based on the following critical parameters that must remain consistent:

• Resistance value: 1 kOhms (exact match required)
• Resistive material: Cermet (maintains performance characteristics)
• Adjustment type: Bottom Adjustment (functional requirement)
• Mounting type: Surface Mount (PCB compatibility)
• Number of turns: 1 (operational specification)
• RoHS3 compliance and MSL 1 rating (regulatory and environmental requirements)

The 3314R-1-102E qualifies as a substitute despite differences in power rating, tolerance, temperature coefficient, termination style, and package dimensions. These variations remain within acceptable engineering parameters for applications where the TC33B-1-102E was originally specified, provided the circuit design accommodates the higher power rating and alternative termination geometry.

Parameter Comparison

Engineering Selection Recommendations

The 3314R-1-102E is the designated substitute for the obsolete TC33B-1-102E. Both components maintain ROHS3 compliance and MSL 1 ratings, ensuring regulatory and environmental compatibility. The 3314R-1-102E offers improved specifications in tolerance (±20% versus ±25%) and temperature coefficient (±100ppm/°C versus ±250ppm/°C), providing enhanced stability in temperature-sensitive applications.

The primary design consideration is termination style transition from J Lead to Gull Wing, which requires PCB footprint modification. The increased package size (square 4.50mm x 4.50mm versus rectangular 3.80mm x 3.60mm) must be evaluated against available board space. The higher power rating (0.25W versus 0.1W) provides additional thermal margin and is not a limiting factor for substitution.

Frequently Asked Questions (FAQ)

Q: Can the 3314R-1-102E directly replace the TC33B-1-102E without PCB modification?

A: No. The termination style differs (Gull Wing versus J Lead) and package dimensions are larger. PCB footprint redesign is required.

Q: Are the resistance and adjustment characteristics identical between these parts?

A: Yes. Both components provide 1 kOhms resistance, 1-turn operation, and bottom adjustment functionality with cermet resistive material.

Q: Does the improved tolerance of the 3314R-1-102E affect circuit compatibility?

A: The tighter tolerance (±20% versus ±25%) of the 3314R-1-102E provides better initial accuracy and is compatible with any circuit designed for the TC33B-1-102E.

Q: What is the impact of the different temperature coefficients?

A: The 3314R-1-102E exhibits lower temperature drift (±100ppm/°C versus ±250ppm/°C), resulting in improved stability across operating temperature ranges.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the TC33B-1-102E and 3314R-1-102E are ROHS3 compliant with MSL 1 ratings, meeting current environmental and handling standards.

Q: What packaging options are available for the 3314R-1-102E?

A: The 3314R-1-102E is supplied in Cut Tape (CT) and Digi-Reel® packaging formats.