ST7TA503 Trimmer Potentiometer - Equivalent & Substitute Parts

Part Overview

The ST7TA503 is a 50 kOhm surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This component features a 0.25W power rating, cermet resistive element, and top adjustment mechanism with J lead termination. The part is currently classified as obsolete, making identification of suitable substitutes necessary for ongoing production and maintenance applications. Active equivalent parts maintain identical electrical and mechanical specifications while offering current availability and updated compliance certifications.

Substiute Parts

ST7TA503

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1017ST7TA503 Datasheet

Current PartRFQ

ST-7ETA503

Nidec Components CorporationIn Stock: 816ST-7ETA503 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ST7TA503 is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part ST-7ETA503 qualifies as a direct equivalent because it maintains identical specifications in the following key areas:

• Resistance value: 50 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±20%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 3
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Physical dimensions: Rectangular - 0.252" x 0.240" Face (6.40mm x 6.10mm)
• Moisture sensitivity level: 1 (Unlimited)

Both parts belong to the ST7 series and share identical functional and dimensional characteristics, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The ST-7ETA503 manufactured by Nidec Components Corporation is the direct equivalent substitute for the obsolete ST7TA503. Selection of the ST-7ETA503 is supported by the following factors:

• All electrical parameters are identical to the original part
• All mechanical and dimensional specifications match exactly
• The substitute part maintains active product status with current availability
• The substitute part achieves ROHS3 compliance, providing improved environmental and regulatory alignment compared to the non-compliant original
• Both parts share identical moisture sensitivity classification and REACH unaffected status
• Packaging in Tape & Reel format supports automated assembly processes

The ST-7ETA503 provides functional and physical compatibility for direct replacement in applications currently using or requiring the ST7TA503 specification.

Frequently Asked Questions (FAQ)

Q: Can the ST-7ETA503 be used as a direct replacement for the ST7TA503?

A: Yes. The ST-7ETA503 is a direct equivalent substitute. All electrical parameters (resistance, power rating, tolerance, temperature coefficient, number of turns) and mechanical specifications (dimensions, termination style, mounting type) are identical between the two parts.

Q: What is the primary reason to substitute the ST7TA503?

A: The ST7TA503 is classified as obsolete. The ST-7ETA503 provides an active, currently available equivalent that maintains identical specifications while offering improved RoHS3 compliance.

Q: Are there any differences in physical dimensions between these parts?

A: No. Both parts share identical rectangular dimensions of 0.252" x 0.240" face (6.40mm x 6.10mm), ensuring compatibility with existing PCB layouts and mechanical assemblies.

Q: Does the packaging format differ between the original and substitute?

A: The ST7TA503 packaging is not specified in available documentation. The ST-7ETA503 is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly processes.

Q: Are there compliance differences between the two parts?

A: Yes. The ST7TA503 is RoHS non-compliant, while the ST-7ETA503 achieves ROHS3 compliance. Both parts maintain identical REACH unaffected status and moisture sensitivity level 1 (unlimited) classification.

Q: What is the series designation for these parts?

A: Both the ST7TA503 and ST-7ETA503 belong to the ST7 trimmer potentiometer series, confirming their functional and design equivalence.