ST-42ETH103 Equivalent & Substitute Parts

Part Overview

The ST-42ETH103 is a 10 kOhms, 0.25W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This Cermet-based component features gull wing termination, side adjustment capability, and a 1.0 turn configuration in a compact rectangular form factor (5.00mm x 4.50mm). The part is actively produced and widely stocked, with 786 units available in inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility requirements are met, enabling procurement flexibility and supply chain continuity.

Substiute Parts

ST-42ETH103

Nidec Components CorporationIn Stock: 796ST-42ETH103 Datasheet

Current PartRFQ

23BR10KLFTR

TT Electronics/BIIn Stock: 222823BR10KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-42ETH103 is determined by strict alignment of the following critical parameters:

• Resistance value: 10 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1.0
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: Gull Wing
• Physical dimensions: Rectangular - 5.00mm x 4.50mm face
• Moisture sensitivity level: 1 (Unlimited)

The 23BR10KLFTR qualifies as a substitute part because it matches all critical electrical and mechanical parameters. The primary distinction is the adjustment type: the ST-42ETH103 features side adjustment, while the 23BR10KLFTR provides top adjustment. Both configurations maintain identical electrical performance and physical compatibility within the specified form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-42ETH103 and 23BR10KLFTR are active production components with full regulatory compliance. The ST-42ETH103 carries ROHS3 Compliant status, while the 23BR10KLFTR is RoHS Compliant. Both parts are REACH Unaffected and classified under ECCN EAR99. Selection between these parts should be based on adjustment accessibility requirements within the application: side adjustment (ST-42ETH103) versus top adjustment (23BR10KLFTR). Inventory availability also factors into procurement decisions, with the 23BR10KLFTR currently stocked at 2200 units compared to 786 units for the ST-42ETH103.

Frequently Asked Questions (FAQ)

Q: Can the 23BR10KLFTR replace the ST-42ETH103 in existing designs?

A: Yes, provided the application accommodates top adjustment instead of side adjustment. All electrical parameters, physical dimensions, and mounting characteristics are identical.

Q: What is the primary difference between these two parts?

A: The adjustment mechanism differs. The ST-42ETH103 uses side adjustment, while the 23BR10KLFTR uses top adjustment. This affects the physical orientation of the adjustment screw and accessibility during calibration.

Q: Are there any compliance differences between these parts?

A: Both parts meet RoHS requirements. The ST-42ETH103 is ROHS3 Compliant, while the 23BR10KLFTR is RoHS Compliant. Both are REACH Unaffected.

Q: Do these parts have different moisture sensitivity requirements?

A: No. Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling is required during storage or assembly.

Q: Can these parts be used interchangeably on the same PCB layout?

A: Physical dimensions and termination style are identical, so PCB footprints are compatible. However, the adjustment mechanism orientation differs, which may affect access to the adjustment screw depending on board layout and enclosure design.