ST-4ETH202 Equivalent & Substitute Parts

Part Overview

The ST-4ETH202 is a 2 kOhm, 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 compact form factors. The part is currently active in production with full inventory availability. Substitute parts may be required due to supply constraints, manufacturing discontinuation, or specific application requirements such as adjustment mechanism preference or lead time optimization.

Substiute Parts

ST-4ETH202

Nidec Components CorporationIn Stock: 842ST-4ETH202 Datasheet

Current PartRFQ

23BR2KLFTR

TT Electronics/BIIn Stock: 144823BR2KLFTR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST-4ETH202 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2 kOhms (exact match required)
• Power rating: 0.25W, 1/4W (exact match required)
• Tolerance: ±20% (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Number of turns: 1 (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: Gull Wing (exact match required)
• Physical dimensions: 5.00mm x 4.50mm face (exact match required)
• Moisture sensitivity level: 1 (exact match required)

The 23BR2KLFTR qualifies as a direct substitute based on full parameter equivalence. The only functional difference is the adjustment mechanism: the ST-4ETH202 features side adjustment, while the 23BR2KLFTR features top adjustment. Both adjustment types provide equivalent tuning capability and are mechanically compatible with standard PCB layouts designed for gull wing trimmer potentiometers of this form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the ST-4ETH202 and 23BR2KLFTR are active production components with full regulatory compliance. The ST-4ETH202 maintains ROHS3 compliance, while the 23BR2KLFTR maintains RoHS compliance. Both parts carry MSL 1 rating and are REACH unaffected.

Selection between these parts should be based on adjustment mechanism accessibility requirements for the specific application. The side adjustment feature of the ST-4ETH202 provides access from the component side, while the top adjustment of the 23BR2KLFTR provides access from the top surface. PCB layout and tuning access constraints determine which adjustment type is appropriate. Both parts are electrically and mechanically interchangeable within standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 23BR2KLFTR replace the ST-4ETH202 in existing designs?

A: Yes, the 23BR2KLFTR is a direct electrical and mechanical substitute. The primary consideration is adjustment mechanism accessibility. If the PCB layout accommodates top adjustment access, the 23BR2KLFTR is fully compatible. If side adjustment access is required, the ST-4ETH202 must be used.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts share identical electrical specifications: 2 kOhm resistance, 0.25W power rating, ±20% tolerance, and ±100ppm/°C temperature coefficient. Electrical performance is equivalent.

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

A: Adjustment type affects physical access to the tuning mechanism during assembly and field calibration. Side adjustment allows tuning from the component edge, while top adjustment allows tuning from the top surface. The choice depends on PCB layout constraints and accessibility requirements.

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

A: Both parts carry MSL 1 rating (unlimited moisture sensitivity protection) and full RoHS/ROHS3 compliance, making them suitable for standard commercial and industrial applications. Specific reliability requirements should be evaluated against application environmental conditions.

Q: What is the packaging format for both parts?

A: Both the ST-4ETH202 and 23BR2KLFTR are supplied in Tape & Reel (TR) packaging, standard for surface mount component automation and high-volume assembly processes.