ST-42ETA102 Equivalent & Substitute Parts

Part Overview

The ST-42ETA102 is a 1 kOhms 0.25W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features J lead termination, top adjustment capability, and a single turn design housed in a rectangular 5.00mm x 4.50mm package. The part is active in production status and widely used in applications requiring precision resistive adjustment in compact form factors. Equivalent and substitute parts are identified when component availability is constrained or when design flexibility permits alternative qualified sources meeting identical electrical and mechanical specifications.

Substiute Parts

ST-42ETA102

Nidec Components CorporationIn Stock: 750ST-42ETA102 Datasheet

Current PartRFQ

23AR1KLFTR

TT Electronics/BIIn Stock: 1078123AR1KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-42ETA102 is determined by strict equivalence across the following critical parameters: resistance value (1 kOhms), power rating (0.25W), 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), and physical package dimensions (5.00mm x 4.50mm). The part 23AR1KLFTR manufactured by TT Electronics/BI meets all these specifications and qualifies as a direct substitute. Both parts maintain identical electrical performance characteristics and mechanical compatibility within the same PCB footprint and assembly process.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-42ETA102 and 23AR1KLFTR are active production components with full regulatory compliance. The ST-42ETA102 carries ROHS3 certification, while the 23AR1KLFTR maintains RoHS compliance. Both parts are REACH unaffected and classified under ECCN EAR99 with identical HTSUS coding (8533.40.8050). Selection between these parts may be based on supply availability, lead time requirements, or established supplier relationships, as electrical and mechanical performance are equivalent. The 23AR1KLFTR currently maintains higher inventory levels (10,703 pcs) compared to the ST-42ETA102 (716 pcs), which may influence procurement decisions during supply constraints.

Frequently Asked Questions (FAQ)

Q: Can the 23AR1KLFTR be used as a direct replacement for the ST-42ETA102 in existing designs?

A: Yes. Both parts share identical electrical specifications (1 kOhms, 0.25W, ±20% tolerance, ±100ppm/°C temperature coefficient) and mechanical characteristics (J lead termination, top adjustment, 5.00mm x 4.50mm package). No PCB layout or schematic modifications are required.

Q: Are there differences in RoHS compliance between these parts?

A: The ST-42ETA102 is ROHS3 compliant, while the 23AR1KLFTR is RoHS compliant. Both meet regulatory requirements for their respective markets. Verify compliance requirements for your specific application and region.

Q: Do both parts use the same packaging format?

A: Yes. Both the ST-42ETA102 and 23AR1KLFTR are supplied in Tape & Reel (TR) format, ensuring compatibility with standard pick-and-place assembly equipment and processes.

Q: What is the moisture sensitivity level for these components?

A: Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control measures are required during storage, handling, or assembly.

Q: Are there any differences in temperature coefficient performance?

A: No. Both parts maintain an identical temperature coefficient of ±100ppm/°C, ensuring equivalent thermal stability across the operating temperature range.