ST4TA104 Equivalent & Substitute Parts

Part Overview

The ST4TA104 is a 100 kOhms surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based trimmer features 0.25W power rating, 1-turn top adjustment, and J-lead termination in a compact rectangular package (5.00mm x 4.50mm). The part is classified as obsolete, making identification of active equivalent alternatives essential for new designs and ongoing production support.

Substiute Parts

ST4TA104

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 801ST4TA104 Datasheet

Current PartRFQ

23AR100KLFTR

TT Electronics / BI TechnologiesIn Stock: 269423AR100KLFTR Datasheet

MFR RecommendedRFQ

ST-42ETA104

Nidec Components CorporationIn Stock: 1142ST-42ETA104 Datasheet

MFR RecommendedRFQ

ST-4ETA104

Nidec Components CorporationIn Stock: 6452ST-4ETA104 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ST4TA104 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for functional interchangeability:

• Resistance value: 100 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Package dimensions: Rectangular - 0.197" x 0.177" Face (5.00mm x 4.50mm)
• Packaging format: Tape & Reel (TR)
• Moisture sensitivity level: 1 (Unlimited)

Three active substitute parts meet these criteria: ST-4ETA104 (Nidec Components Corporation, ST4 series), ST-42ETA104 (Nidec Components Corporation, ST42 series), and 23AR100KLFTR (TT Electronics / BI Technologies, 23 series).

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—ST-4ETA104, ST-42ETA104, and 23AR100KLFTR—provide electrical and mechanical equivalence to the obsolete ST4TA104. Selection among these alternatives should be based on product status and regulatory compliance.

ST-4ETA104 (Nidec Components Corporation, ST4 series) maintains the same series designation as the original part and carries ROHS3 compliance. This option provides continuity with the original design lineage while offering active production status and the highest inventory availability (6423 units).

ST-42ETA104 (Nidec Components Corporation, ST42 series) is also manufactured by Nidec Components Corporation with ROHS3 compliance and active product status. This represents an alternative within the Nidec product portfolio with moderate inventory availability (1054 units).

23AR100KLFTR (TT Electronics / BI Technologies, 23 series) is manufactured by a different supplier and carries RoHS compliance. This option provides an alternative sourcing path with substantial inventory availability (2672 units).

All three parts are REACH Unaffected and classified under ECCN EAR99 with identical HTSUS coding (8533.40.8050).

Frequently Asked Questions (FAQ)

Q: Can ST-4ETA104, ST-42ETA104, and 23AR100KLFTR be used interchangeably with ST4TA104?

A: Yes. All three substitute parts match the ST4TA104 across all critical electrical parameters (100 kOhms resistance, 0.25W power rating, ±20% tolerance, ±100ppm/°C temperature coefficient, 1-turn adjustment) and mechanical specifications (surface mount, J-lead termination, identical package dimensions, tape & reel packaging, MSL 1).

Q: What is the primary reason for substitution?

A: The ST4TA104 is classified as obsolete. The three substitute parts are all active products, ensuring long-term availability and production support.

Q: Are there compliance differences between the main part and substitutes?

A: Yes. The ST4TA104 is RoHS non-compliant. All three substitutes are RoHS compliant (ST-4ETA104 and ST-42ETA104 are ROHS3 Compliant; 23AR100KLFTR is RoHS Compliant). All parts share identical REACH Unaffected status, ECCN EAR99 classification, and HTSUS coding.

Q: Do the substitute parts have different package dimensions?

A: No. All substitute parts maintain the identical rectangular package dimensions of 0.197" x 0.177" face (5.00mm x 4.50mm) and are supplied in tape & reel format.

Q: Which substitute offers the best inventory availability?

A: ST-4ETA104 offers the highest inventory availability with 6423 units in stock, followed by 23AR100KLFTR with 2672 units and ST-42ETA104 with 1054 units.

Q: Are there differences in manufacturer sourcing?

A: Yes. ST-4ETA104 and ST-42ETA104 are both manufactured by Nidec Components Corporation. 23AR100KLFTR is manufactured by TT Electronics / BI Technologies, providing an alternative supplier option.