TC33B-1-204E Equivalent & Substitute Parts

Part Overview

The TC33B-1-204E is a 200 kOhms surface mount trimmer potentiometer manufactured by Bourns Inc., part of the Trimpot® TC33 - Open Frame series. This component is rated at 0.1W (1/10W) with J Lead termination and bottom adjustment capability. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations where this resistance value and power rating are required.

Substiute Parts

TC33B-1-204E

Bourns Inc.In Stock: 1121TC33B-1-204E Datasheet

Current PartRFQ

3314R-1-204E

Bourns Inc.In Stock: 9923314R-1-204E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC33B-1-204E is determined by the following critical parameters:

• Resistance Value: 200 kOhms (exact match required)
• Mounting Type: Surface Mount (required for PCB compatibility)
• Adjustment Type: Bottom Adjustment (functional requirement)
• Resistive Material: Cermet (performance characteristic)
• Number of Turns: 1 (operational specification)
• Compliance Standards: ROHS3 Compliant, REACH Unaffected (regulatory requirement)

The 3314R-1-204E qualifies as a substitute based on matching resistance, mounting type, adjustment type, resistive material, and turn count. Differences in power rating, tolerance, temperature coefficient, termination style, and physical dimensions represent trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 3314R-1-204E is an active product from Bourns Inc. and represents a viable substitute for the obsolete TC33B-1-204E based on matching core electrical parameters: 200 kOhms resistance, 1-turn operation, bottom adjustment, and Cermet resistive material. Both components maintain ROHS3 compliance and unlimited MSL ratings.

The 3314R-1-204E offers improved specifications in tolerance (±20% versus ±25%) and temperature coefficient (±100ppm/°C versus ±250ppm/°C), along with higher power dissipation capability (0.25W versus 0.1W). These enhancements provide greater performance margin in applications where the original TC33B-1-204E was specified.

Physical differences require consideration: the 3314R-1-204E uses Gull Wing termination and a larger square footprint (4.50mm x 4.50mm) compared to the rectangular J Lead configuration (3.80mm x 3.60mm) of the TC33B-1-204E. PCB layout modifications and reflow profile adjustments may be necessary to accommodate the different termination style and dimensions.

Frequently Asked Questions (FAQ)

Q: Can the 3314R-1-204E directly replace the TC33B-1-204E without PCB modifications?

A: The 3314R-1-204E matches the critical electrical parameters (200 kOhms, 1-turn, bottom adjustment, Cermet material) but differs in termination style (Gull Wing versus J Lead) and physical dimensions. PCB footprint redesign is required.

Q: What is the significance of the power rating difference (0.1W versus 0.25W)?

A: The 3314R-1-204E has a higher power dissipation rating. If the original application operates below 0.1W, the substitute provides additional thermal margin. If the application requires exactly 0.1W operation, the higher rating does not create incompatibility.

Q: Why does the 3314R-1-204E have better tolerance and temperature coefficient specifications?

A: The 3314R-1-204E belongs to the Trimpot® 3314 - Sealed series, which represents a more recent product line with improved manufacturing processes and performance characteristics compared to the obsolete TC33 - Open Frame series.

Q: Are both components compliant with current regulatory standards?

A: Yes. Both the TC33B-1-204E and 3314R-1-204E are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging considerations apply to the 3314R-1-204E?

A: The 3314R-1-204E is supplied in Tape & Reel (TR) packaging. Verify that your assembly process accommodates this packaging format and the Gull Wing termination style.