CT-94X-104 Equivalent & Substitute Parts

Part Overview

The CT-94X-104 is a 100 kOhms, 0.5W through-hole trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based component features 18-turn side adjustment with PC pin termination and rectangular form factor (9.60mm x 4.80mm). The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical performance and mechanical compatibility while meeting current compliance requirements.

Substiute Parts

CT-94X-104

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 736CT-94X-104 Datasheet

Current PartRFQ

CT-94EX104

Nidec Components CorporationIn Stock: 1709CT-94EX104 Datasheet

DirectRFQ

3296X-1-104

Bourns Inc.In Stock: 11893296X-1-104 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters: resistance value (100 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), adjustment type (side adjustment), resistive material (cermet), mounting type (through hole), and termination style (PC pins).

Two substitute parts meet these criteria:

CT-94EX104 (Nidec Components Corporation): Maintains all electrical specifications and mechanical form factor identical to the main part. Differs only in product status (active vs. obsolete) and RoHS compliance (ROHS3 compliant vs. non-compliant).

3296X-1-104 (Bourns Inc.): Maintains all electrical specifications and termination style. Differs in number of turns (25 vs. 18) and face dimension (0.395" x 0.190" vs. 0.378" x 0.189"), representing a minor mechanical variation within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

CT-94EX104 is the primary substitute for direct replacement applications. This part maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. Selection of this part eliminates obsolescence risk and aligns with current environmental regulations.

3296X-1-104 serves as an alternative substitute where mechanical tolerance permits. The 25-turn configuration provides finer adjustment resolution compared to the 18-turn main part. The face dimension increase (10.03mm x 4.83mm vs. 9.60mm x 4.80mm) represents a 0.43mm width and 0.03mm height variation. This part maintains active status but carries REACH-affected designation and non-compliant RoHS status.

Selection between CT-94EX104 and 3296X-1-104 depends on PCB layout constraints and adjustment resolution requirements. CT-94EX104 is recommended for space-constrained applications and compliance-critical designs. 3296X-1-104 is suitable for applications where increased turn count provides operational advantage and mechanical tolerance permits the dimensional variation.

Frequently Asked Questions (FAQ)

Q: Can CT-94EX104 replace CT-94X-104 without circuit modification?

A: Yes. CT-94EX104 maintains identical electrical specifications (100 kOhms, 0.5W, ±10% tolerance, ±100ppm/°C) and mechanical form factor (9.60mm x 4.80mm face dimension). Direct substitution is supported.

Q: What is the significance of the 25-turn vs. 18-turn difference between CT-94X-104 and 3296X-1-104?

A: Turn count affects adjustment resolution. The 25-turn configuration in 3296X-1-104 provides finer incremental adjustment per rotation compared to the 18-turn main part. Both maintain the same resistance range and electrical performance. Selection depends on application-specific adjustment precision requirements.

Q: Does the 0.43mm width increase in 3296X-1-104 affect PCB compatibility?

A: The 3296X-1-104 face dimension (10.03mm x 4.83mm) differs from the main part (9.60mm x 4.80mm). PCB layout must accommodate this variation. Verify mounting hole spacing and adjacent component clearance before selection.

Q: Why is CT-94EX104 marked ROHS3 compliant while the main part is non-compliant?

A: RoHS compliance reflects manufacturing process and material composition standards. CT-94EX104 meets current RoHS3 requirements, making it suitable for applications subject to environmental regulations. The main part, classified as obsolete, predates current compliance mandates.

Q: Are there packaging differences between the substitute parts?

A: CT-94EX104 is supplied in bulk packaging. 3296X-1-104 is supplied in tube packaging. Packaging selection may affect procurement logistics and component handling procedures but does not impact electrical or mechanical performance.