ST-4ETH104 Equivalent & Substitute Parts

Part Overview

The ST-4ETH104 is a 100 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 applications requiring precision variable resistance in compact form factors. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter set.

Substiute Parts

ST-4ETH104

Nidec Components CorporationIn Stock: 1162ST-4ETH104 Datasheet

Current PartRFQ

23BR100KLFTR

TT Electronics/BIIn Stock: 738723BR100KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-4ETH104 is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 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: 5.00mm x 4.50mm face
• Packaging format: Tape & Reel

The identified substitute part maintains all electrical and mechanical specifications within these parameters. Variations in adjustment type (side versus top adjustment) do not affect electrical performance or circuit functionality and remain within acceptable substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-4ETH104 and 23BR100KLFTR meet the electrical and mechanical requirements for direct substitution. Selection between these parts should be based on:

• Availability and lead time requirements
• Procurement cost and inventory positioning
• Adjustment type preference (side adjustment for ST-4ETH104; top adjustment for 23BR100KLFTR)
• Compliance certifications: Both parts maintain RoHS compliance and unlimited MSL rating, suitable for standard storage and handling conditions
• Manufacturing continuity: Both parts carry active product status

Frequently Asked Questions (FAQ)

Q: Can the 23BR100KLFTR replace the ST-4ETH104 in existing designs?

A: Yes. Both parts share identical electrical specifications (100 kOhms, 0.25W, ±20% tolerance, ±100ppm/°C), resistive material (cermet), mounting type (surface mount), termination style (gull wing), and physical dimensions (5.00mm x 4.50mm). The difference in adjustment type (top versus side) does not affect circuit performance.

Q: What is the significance of adjustment type differences?

A: Adjustment type refers to the physical orientation of the trimmer adjustment mechanism. Side adjustment and top adjustment are mechanical variations that do not alter electrical characteristics or circuit functionality. Selection depends on PCB layout and accessibility requirements during calibration.

Q: Are both parts suitable for high-reliability applications?

A: Both parts maintain RoHS compliance and MSL Level 1 (unlimited moisture sensitivity), indicating suitability for standard industrial and commercial applications. Specific reliability requirements should be evaluated against application-level specifications.

Q: What packaging considerations apply to these parts?

A: Both parts are supplied in Tape & Reel (TR) format, standard for automated assembly processes. Handling and storage follow standard MSL Level 1 protocols with no special moisture control requirements.

Q: Are there any compliance differences between the two parts?

A: Both parts are RoHS compliant and REACH unaffected. The ST-4ETH104 carries RoHS3 designation, while the 23BR100KLFTR carries standard RoHS designation. Both meet regulatory requirements for their respective markets.