ST32TA503 Equivalent & Substitute Parts

Part Overview

The ST32TA503 is a 50 kOhms surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based trimmer features 0.125W power rating, 1-turn top adjustment, and J lead termination in a square 3.40mm x 3.40mm package. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

ST32TA503

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1180ST32TA503 Datasheet

Current PartRFQ

22AR50KLFTR

TT Electronics/BIIn Stock: 1919922AR50KLFTR Datasheet

MFR RecommendedRFQ

ST-32ETA503

Nidec Components CorporationIn Stock: 9417ST-32ETA503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST32TA503 is determined by strict equivalence across the following critical parameters:

• Resistance value: 50 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)

All identified substitutes meet these electrical and mechanical requirements. Physical dimensions may vary within acceptable tolerances for PCB layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both 22AR50KLFTR and ST-32ETA503 are qualified substitutes for the obsolete ST32TA503. Selection between these alternatives should be based on the following factors:

22AR50KLFTR (TT Electronics/BI): Active product status with 19,136 units in stock. Rectangular package dimensions (4.60mm x 3.20mm) differ slightly from the original square format. RoHS compliant. Suitable for new designs and high-volume production requiring extended supply availability.

ST-32ETA503 (Nidec Components Corporation): Active product status with 9,346 units in stock. Maintains identical square package dimensions (3.40mm x 3.40mm) as the original ST32TA503, minimizing PCB layout modifications. ROHS3 compliant. Recommended for direct replacement in existing designs where package footprint compatibility is critical.

Both substitutes maintain full electrical equivalence and regulatory compliance (RoHS, REACH, EAR99).

Frequently Asked Questions (FAQ)

Q: Can the 22AR50KLFTR be used as a direct drop-in replacement for ST32TA503?

A: Electrical parameters are fully equivalent. Physical dimensions differ: 22AR50KLFTR is rectangular (4.60mm x 3.20mm) versus the original square format (3.40mm x 3.40mm). PCB layout verification is required to confirm footprint compatibility.

Q: Is the ST-32ETA503 a pin-for-pin equivalent?

A: Yes. The ST-32ETA503 maintains identical electrical specifications and square package dimensions (3.40mm x 3.40mm) as the ST32TA503, enabling direct substitution without PCB modifications.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both designations indicate RoHS compliance. ROHS3 refers to compliance with the third iteration of the RoHS directive. All three parts meet current RoHS requirements.

Q: Are both substitutes suitable for new product designs?

A: Yes. Both 22AR50KLFTR and ST-32ETA503 are active products with established supply chains. Selection depends on PCB layout constraints and packaging preferences.

Q: What is the MSL rating significance?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling, simplifying logistics and inventory management.