ST3TA102 Equivalent & Substitute Parts

Part Overview

The ST3TA102 is a 1 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

ST3TA102

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1005ST3TA102 Datasheet

Current PartRFQ

3313J-1-102E

Bourns Inc.In Stock: 108653313J-1-102E Datasheet

MFR RecommendedRFQ

ST-32ETA102

Nidec Components CorporationIn Stock: 3549ST-32ETA102 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ST3TA102 are qualified based on matching the following critical parameters:

• Resistance value: 1 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 qualified substitutes maintain identical electrical specifications and mechanical compatibility with the original part. Physical dimensions may vary within acceptable tolerances for PCB footprint compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both 3313J-1-102E (Bourns Inc.) and ST-32ETA102 (Nidec Components Corporation) are active product substitutes for the obsolete ST3TA102. Selection between these alternatives should be based on:

Product Availability: The 3313J-1-102E offers higher inventory availability (10,800 pcs) compared to ST-32ETA102 (3,514 pcs), supporting volume production requirements.

Regulatory Compliance: Both substitute parts are ROHS3 compliant, meeting current environmental and regulatory standards. The original ST3TA102 is RoHS non-compliant and unsuitable for new designs subject to RoHS requirements.

Packaging Format: Both substitutes are supplied in Tape & Reel (TR) packaging, standard for automated assembly processes.

Certification Status: Both parts maintain REACH Unaffected and EAR99 ECCN classifications, matching the original part's export and compliance profile.

Frequently Asked Questions (FAQ)

Q: Can ST3TA102 be directly replaced with 3313J-1-102E or ST-32ETA102?

A: Yes. Both substitutes match all critical electrical parameters (resistance, power rating, tolerance, temperature coefficient, number of turns, adjustment type, and resistive material) and mechanical specifications (surface mount, J lead termination, MSL rating). Physical dimensions are within acceptable tolerances for PCB footprint compatibility.

Q: What is the primary reason to substitute the ST3TA102?

A: The ST3TA102 is obsolete and no longer manufactured. Active substitutes ensure design continuity, production support, and compliance with current regulatory standards.

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

A: Yes. The ST3TA102 is RoHS non-compliant, while both 3313J-1-102E and ST-32ETA102 are ROHS3 compliant. For applications subject to RoHS requirements, substitutes are mandatory.

Q: Do the substitute parts require PCB layout modifications?

A: The ST-32ETA102 has a square footprint (0.134" x 0.134"), while the ST3TA102 and 3313J-1-102E have rectangular footprints (0.138" x 0.126"). Verify PCB footprint compatibility before design implementation.

Q: Which substitute offers better long-term availability?

A: The 3313J-1-102E (Bourns Trimpot® 3313 series) is an active product with higher inventory levels, supporting sustained production and design longevity.