ST-42ETH102 Equivalent & Substitute Parts

Part Overview

The ST-42ETH102 is a 1 kOhms, 0.25W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features gull wing termination and side adjustment capability, designed for precision tuning applications in electronic circuits. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and functional characteristics align with the original component, enabling seamless integration in existing designs or alternative sourcing scenarios.

Substiute Parts

ST-42ETH102

Nidec Components CorporationIn Stock: 1181ST-42ETH102 Datasheet

Current PartRFQ

23BR1KLFTR

TT Electronics/BIIn Stock: 224223BR1KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST-42ETH102 are identified based on strict alignment of the following critical parameters:

• Resistance value: 1 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: Gull Wing
• Physical dimensions: Rectangular - 0.197" x 0.177" Face (5.00mm x 4.50mm)
• Regulatory compliance: RoHS and REACH status

The 23BR1KLFTR from TT Electronics/BI qualifies as a substitute part because it maintains identical electrical specifications, material composition, mounting characteristics, and physical footprint. The primary functional difference is the adjustment mechanism (top adjustment versus side adjustment), which does not affect electrical performance or circuit compatibility in applications where adjustment accessibility is not a design constraint.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-42ETH102 and 23BR1KLFTR maintain active product status with full regulatory compliance. The ST-42ETH102 carries RoHS3 certification, while the 23BR1KLFTR holds RoHS compliance. Both components are REACH unaffected and classified under ECCN EAR99 with identical HTSUS coding (8533.40.8050).

Selection between these parts should be based on:

• Adjustment mechanism accessibility requirements in the application (side adjustment versus top adjustment)
• Packaging preference (Tape & Reel for ST-42ETH102 versus Cut Tape & Digi-Reel for 23BR1KLFTR)
• Inventory availability and lead time considerations
• Design layout constraints related to adjustment access

Both parts are electrically and mechanically interchangeable for applications where the adjustment mechanism difference does not impact circuit performance or manufacturing assembly procedures.

Frequently Asked Questions (FAQ)

Q: Can the 23BR1KLFTR replace the ST-42ETH102 in my circuit?

A: Yes, the 23BR1KLFTR is electrically and mechanically equivalent. Both components share identical resistance, power rating, tolerance, temperature coefficient, material composition, mounting type, termination style, and physical dimensions. The adjustment mechanism differs (top versus side), which affects how the potentiometer is tuned but not its electrical function.

Q: What is the difference between side adjustment and top adjustment?

A: Side adjustment allows tuning access from the side of the component, while top adjustment provides tuning access from the top surface. This difference affects PCB layout and assembly accessibility but does not alter electrical performance or circuit compatibility.

Q: Are both parts RoHS compliant?

A: Yes. The ST-42ETH102 is RoHS3 compliant, and the 23BR1KLFTR is RoHS compliant. Both meet environmental regulatory requirements for lead-free manufacturing.

Q: What packaging options are available?

A: The ST-42ETH102 is supplied in Tape & Reel (TR) packaging, while the 23BR1KLFTR is available in Cut Tape (CT) & Digi-Reel packaging. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Do these parts have moisture sensitivity concerns?

A: No. Both components carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling or storage requirements during manufacturing or assembly.

Q: Are there any compliance or certification differences?

A: Both parts are REACH unaffected and classified as EAR99 for export control purposes. The primary compliance difference is RoHS3 (ST-42ETH102) versus RoHS (23BR1KLFTR), both of which satisfy current environmental standards.