ST3TA203 Equivalent & Substitute Parts

Part Overview

The ST3TA203 is a 20 kOhms surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based trimmer features 0.125W power rating, ±20% tolerance, and top adjustment capability with J lead termination. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

ST3TA203

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1071ST3TA203 Datasheet

Current PartRFQ

3313J-1-203E

Bourns Inc.In Stock: 302953313J-1-203E Datasheet

MFR RecommendedRFQ

ST-32ETA203

Nidec Components CorporationIn Stock: 20236ST-32ETA203 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST3TA203 are qualified based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

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

Both identified substitutes meet all electrical specifications and functional requirements. Physical dimensions show minor variations within acceptable tolerances for PCB layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

3313J-1-203E (Bourns Inc., Trimpot® 3313 - Sealed Series)

This substitute is recommended as the primary replacement. It maintains identical electrical specifications and physical footprint compatibility. The part is in active production status with substantial inventory availability (30,200 pcs). ROHS3 compliance provides regulatory advantage for new designs and manufacturing environments with RoHS requirements.

ST-32ETA203 (Nidec Components Corporation, ST-32 Series)

This substitute provides full electrical equivalence with active product status and ROHS3 compliance. Physical dimensions show a square footprint (0.134" x 0.134") compared to the rectangular geometry of the original part (0.138" x 0.126"). This dimensional variation requires PCB layout verification to confirm mechanical fit within existing component placement constraints. Inventory availability is substantial (20,202 pcs).

Frequently Asked Questions (FAQ)

Q: Can the 3313J-1-203E and ST-32ETA203 be used interchangeably with the ST3TA203?

A: Both parts meet all electrical specifications (20 kOhms, 0.125W, ±20% tolerance, ±100ppm/°C temperature coefficient, 1 turn, top adjustment, cermet material, surface mount, J lead termination). The 3313J-1-203E maintains identical rectangular dimensions. The ST-32ETA203 has a square footprint requiring PCB layout verification.

Q: What is the significance of the product status change from Obsolete to Active?

A: Active status indicates current manufacturing and ongoing supply availability. This eliminates long-term supply chain risk associated with obsolete components and enables future design iterations without component sourcing constraints.

Q: Does RoHS3 compliance affect electrical performance?

A: RoHS3 compliance reflects manufacturing process changes to eliminate restricted substances. Electrical performance remains identical to the original part. RoHS3 compliance is required for many manufacturing environments and regulatory jurisdictions.

Q: Are there packaging differences between the substitutes?

A: The ST3TA203 packaging is not specified in available data. The 3313J-1-203E is supplied in Tape & Reel (TR) format. The ST-32ETA203 is supplied in Tape & Reel (TR) format. Confirm packaging requirements with procurement specifications.

Q: What is the impact of the dimensional difference in the ST-32ETA203?

A: The ST-32ETA203 has a square footprint (3.40mm x 3.40mm) versus the rectangular footprint of the original part (4.60mm x 3.20mm). PCB layout must be verified to confirm the component fits within the allocated space and does not interfere with adjacent components or traces.