ST3TA502 Equivalent & Substitute Parts

Part Overview

The ST3TA502 is a 5 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 part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

ST3TA502

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 821ST3TA502 Datasheet

Current PartRFQ

3313J-1-502E

Bourns Inc.In Stock: 304683313J-1-502E Datasheet

MFR RecommendedRFQ

ST-32ETA502

Nidec Components CorporationIn Stock: 20484ST-32ETA502 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST3TA502 is determined by strict equivalence across the following critical parameters: resistance value (5 kOhms), power rating (0.125W), 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), and moisture sensitivity level (MSL 1). Physical dimensions may vary within acceptable tolerances for PCB footprint compatibility. All identified substitutes meet these core electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts—3313J-1-502E (Bourns Inc.) and ST-32ETA502 (Nidec Components Corporation)—are active products with full electrical and mechanical equivalence to the obsolete ST3TA502. Both substitutes achieve ROHS3 compliance, addressing regulatory requirements that the original part does not meet. Selection between these two alternatives should be based on availability, lead time, packaging format (both supplied in Tape & Reel), and established supplier relationships. Physical dimensions show minor variation: the Bourns part maintains the original rectangular face (0.138" x 0.126"), while the Nidec part features a square face (0.134" x 0.134"). PCB layout verification is required to confirm footprint compatibility with the selected substitute.

Frequently Asked Questions (FAQ)

Q: Can the 3313J-1-502E and ST-32ETA502 be used interchangeably with the ST3TA502?

A: Both parts meet all electrical specifications (5 kOhms, 0.125W, ±20% tolerance, ±100ppm/°C temperature coefficient, 1 turn, top adjustment, cermet material, J lead termination, MSL 1). Physical dimensions differ slightly; PCB footprint compatibility must be confirmed before substitution.

Q: What is the primary reason for substituting the ST3TA502?

A: The ST3TA502 is classified as obsolete. The recommended substitutes are active products with current manufacturing support and improved RoHS3 compliance.

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

A: The ST3TA502 is RoHS non-compliant. Both substitute parts (3313J-1-502E and ST-32ETA502) are ROHS3 compliant. All three parts share identical REACH and ECCN classifications.

Q: How do the physical dimensions affect substitution?

A: The Bourns 3313J-1-502E maintains a rectangular face (0.138" x 0.126"), matching the original ST3TA502 footprint. The Nidec ST-32ETA502 features a square face (0.134" x 0.134"). Verify PCB layout compatibility before final selection.

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

A: Both substitute parts are supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.