ST-42ETH104 Equivalent & Substitute Parts

Part Overview

The ST-42ETH104 is a 100 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 maintains full RoHS3 compliance with unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same functional category.

Substiute Parts

ST-42ETH104

Nidec Components CorporationIn Stock: 1019ST-42ETH104 Datasheet

Current PartRFQ

23BR100KLFTR

TT Electronics/BIIn Stock: 738723BR100KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The 23BR100KLFTR qualifies as a direct substitute based on the following matched parameters:

• Resistance value: 100 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 - 0.197" x 0.177" Face (5.00mm x 4.50mm)
• RoHS compliance: Active compliance status
• MSL rating: 1 (Unlimited)

The primary functional difference is the adjustment type: the ST-42ETH104 features side adjustment, while the 23BR100KLFTR features top adjustment. Both configurations maintain identical electrical performance and mechanical compatibility within the same PCB footprint.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-42ETH104 and 23BR100KLFTR are active production components with full RoHS compliance. Selection between these parts depends on adjustment accessibility requirements within the application:

• ST-42ETH104: Select when side adjustment access is required or preferred in the circuit design.
• 23BR100KLFTR: Select when top adjustment access is required or preferred in the circuit design.

Both parts maintain identical electrical performance, mechanical footprint compatibility, and regulatory compliance status. The choice is determined by physical access requirements during calibration or field adjustment operations.

Frequently Asked Questions (FAQ)

Q: Can the 23BR100KLFTR replace the ST-42ETH104 in existing designs?

A: Yes, provided the adjustment access point (top vs. side) is compatible with the PCB layout and mechanical design. All electrical parameters and physical dimensions are identical.

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

A: Both parts maintain RoHS compliance. The ST-42ETH104 is RoHS3 compliant, while the 23BR100KLFTR is RoHS compliant. Both meet current regulatory requirements.

Q: What is the significance of the adjustment type difference?

A: Adjustment type determines the physical location of the trimmer screw access point. Side adjustment places the adjustment screw on the side face, while top adjustment places it on the top face. This affects PCB layout and mechanical clearance planning but does not impact electrical performance.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both parts carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Do both parts use the same resistive material?

A: Yes. Both utilize Cermet resistive material, ensuring identical electrical characteristics and temperature stability across the specified operating range.