ST-42ETA103 Equivalent & Substitute Parts

Part Overview

The ST-42ETA103 is a 10 kOhms surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This 0.25W cermet trimmer features J lead termination with top adjustment capability and 1.0 turn rotation. The component is actively produced and stocked, with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Substiute Parts

ST-42ETA103

Nidec Components CorporationIn Stock: 1147ST-42ETA103 Datasheet

Current PartRFQ

23AR10KLFTR

TT Electronics/BIIn Stock: 208723AR10KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-42ETA103 is determined by strict equivalence across the following critical parameters:

• Resistance value: 10 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
• Physical dimensions: Rectangular - 0.197" x 0.177" Face (5.00mm x 4.50mm)
• Packaging format: Tape & Reel (TR)

The substitute part 23AR10KLFTR manufactured by TT Electronics/BI meets all specified electrical and mechanical parameters, enabling direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-42ETA103 and 23AR10KLFTR are actively produced components with equivalent compliance certifications. The ST-42ETA103 maintains ROHS3 compliance, while the 23AR10KLFTR carries RoHS compliance. Both components are REACH unaffected and classified under EAR99 export control. Selection between these parts may be based on availability, lead time, or supply chain considerations, as electrical performance and mechanical compatibility are identical. Current inventory levels show 1042 units of ST-42ETA103 and 2000 units of 23AR10KLFTR available in Tape & Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can the 23AR10KLFTR replace the ST-42ETA103 in existing designs?

A: Yes. The 23AR10KLFTR meets all electrical specifications (10 kOhms, 0.25W, ±20% tolerance, ±100ppm/°C temperature coefficient) and mechanical requirements (1.0 turn top adjustment, J lead termination, identical physical dimensions) of the ST-42ETA103. Both components use cermet resistive material and surface mount technology with identical packaging format.

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

A: Both components are REACH unaffected and classified as EAR99. The ST-42ETA103 carries ROHS3 compliance while the 23AR10KLFTR carries RoHS compliance. Both maintain MSL rating 1 (unlimited moisture sensitivity). Compliance differences do not affect functional equivalence.

Q: What are the critical parameters for substitution?

A: Substitution is valid when resistance (10 kOhms), power rating (0.25W), tolerance (±20%), temperature coefficient (±100ppm/°C), number of turns (1), adjustment type (top), resistive material (cermet), mounting type (surface mount), termination style (J lead), and physical dimensions (5.00mm x 4.50mm) remain identical.

Q: Does packaging format affect compatibility?

A: No. Both the ST-42ETA103 and 23AR10KLFTR are supplied in Tape & Reel (TR) format, ensuring compatibility with standard pick-and-place assembly equipment and handling procedures.

Q: Are there any performance differences between manufacturers?

A: Both components share identical electrical specifications and mechanical dimensions. Performance differences, if any, would fall within the specified ±20% tolerance and ±100ppm/°C temperature coefficient ranges common to both parts.