ST3TA202 Equivalent & Substitute Parts

Part Overview

The ST3TA202 is a 2 kOhms, 0.125W surface mount trimmer potentiometer with J lead termination, cermet resistive material, and top adjustment capability. Manufactured by Vishay Beyschlag/Draloric/BC Components as part of the ST3 series, this component is classified as obsolete. Due to its discontinued status and limited availability relative to active alternatives, equivalent substitute parts are necessary for ongoing design support and production continuity.

Substiute Parts

ST3TA202

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 908ST3TA202 Datasheet

Current PartRFQ

3313J-1-202E

Bourns Inc.In Stock: 154403313J-1-202E Datasheet

MFR RecommendedRFQ

ST-32ETA202

Nidec Components CorporationIn Stock: 118121ST-32ETA202 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST3TA202 are qualified based on matching the following critical electrical and mechanical parameters:

• Resistance value: 2 kOhms
• Power rating: 0.125W (1/8W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Moisture sensitivity level: 1 (Unlimited)

Both substitute parts meet these criteria. Minor dimensional variations in face geometry (rectangular vs. square) do not affect electrical performance or functional compatibility in standard PCB layouts designed for J lead surface mount trimmers.

Parameter Comparison

Engineering Selection Recommendations

The 3313J-1-202E (Bourns Trimpot® 3313 - Sealed) and ST-32ETA202 (Nidec ST-32 series) are both qualified substitutes for the obsolete ST3TA202. Selection between these two active alternatives should be based on:

• Availability: ST-32ETA202 maintains higher inventory levels (118,083 pcs) compared to 3313J-1-202E (15,400 pcs)
• Compliance: Both parts are ROHS3 compliant, addressing regulatory requirements that the original ST3TA202 does not meet
• Packaging: Both are supplied in Tape & Reel format suitable for automated assembly
• Dimensional compatibility: The ST-32ETA202 features a square face geometry (0.134" x 0.134", 3.40mm x 3.40mm) versus the rectangular face of the 3313J-1-202E (0.138" x 0.126", 4.60mm x 3.20mm). PCB layout verification is required if dimensional tolerance is critical to the application

Frequently Asked Questions (FAQ)

Q: Can the 3313J-1-202E and ST-32ETA202 be used interchangeably with the ST3TA202?

A: Yes, both parts are electrically and functionally equivalent. All critical parameters—resistance, power rating, tolerance, temperature coefficient, adjustment type, and termination style—are identical. Mechanical compatibility depends on PCB pad layout and available space for the slight dimensional differences.

Q: What is the primary reason to substitute the ST3TA202?

A: The ST3TA202 is obsolete and has limited inventory. The substitute parts are active products with established supply chains and higher stock levels, ensuring long-term availability for production and design support.

Q: Are there compliance differences between the original and substitute parts?

A: Yes. The ST3TA202 is RoHS non-compliant, while both 3313J-1-202E and ST-32ETA202 are ROHS3 compliant. If RoHS compliance is required for your application, either substitute part is suitable.

Q: Do the dimensional differences between the rectangular and square face geometries affect circuit performance?

A: No. The face geometry does not affect electrical performance. However, PCB pad layout and available mounting space must accommodate the specific dimensions of the selected substitute. Verify pad spacing and clearances during design review.

Q: What packaging formats are available for the substitute parts?

A: Both 3313J-1-202E and ST-32ETA202 are supplied in Tape & Reel (TR) format, standard for automated surface mount assembly processes.

Q: Are the substitute parts rated for the same environmental conditions?

A: Yes. Both substitute parts have Moisture Sensitivity Level 1 (Unlimited), matching the ST3TA202. Temperature coefficient and operating specifications are identical across all three parts.