SM-3TB103 Equivalent & Substitute Parts

Part Overview

The SM-3TB103 is a 10 kOhms, 0.125W surface mount trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features gull wing termination and side adjustment capability with 11 turns of resolution. The part is Active status and widely used in precision analog circuit applications requiring adjustable resistance in compact form factors. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance align with the original component requirements.

Substiute Parts

SM-3TB103

Nidec Components CorporationIn Stock: 1071SM-3TB103 Datasheet

Current PartRFQ

3223G-1-103E

Bourns Inc.In Stock: 16043223G-1-103E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM-3TB103 are qualified based on the following critical parameters:

• Resistance value: 10 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: 11 (exact match required)
• Adjustment type: Side Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: Gull Wing (exact match required)
• RoHS compliance: ROHS3 Compliant (minimum requirement)
• MSL rating: 1 or better (exact match required)

The 3223G-1-103E from Bourns Inc. meets all electrical and mechanical substitution criteria. Minor dimensional variations in the face geometry (rectangular vs. square) do not affect functional performance or PCB layout compatibility for standard applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SM-3TB103 and 3223G-1-103E are Active status components with full ROHS3 compliance and unlimited moisture sensitivity ratings. The Bourns 3223G-1-103E (Trimpot® 3223 - Sealed series) is functionally equivalent for all electrical and mechanical applications. Selection between these parts should be based on availability, lead time, and cost considerations, as all critical performance parameters are identical. The rectangular face geometry of the Bourns part accommodates standard PCB footprints designed for 10 kOhms, 0.125W gull wing surface mount trimmers.

Frequently Asked Questions (FAQ)

Q: Can the 3223G-1-103E replace the SM-3TB103 in existing designs?

A: Yes. All electrical specifications, mechanical mounting characteristics, and regulatory compliance parameters are identical. The minor difference in face geometry (rectangular vs. square) does not affect PCB layout compatibility or functional performance.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant with MSL rating 1 (Unlimited). The SM-3TB103 is REACH Unaffected; the 3223G-1-103E is REACH Affected. Verify REACH compliance requirements for your specific application and end-use region.

Q: What determines substitution eligibility for this trimmer potentiometer?

A: Substitution is based on exact matching of resistance value, power rating, tolerance, temperature coefficient, number of turns, adjustment type, resistive material, mounting type, termination style, and moisture sensitivity level. All these parameters must align for functional equivalence.

Q: Are packaging formats interchangeable?

A: Both parts are supplied in Tape & Reel (TR) packaging. Verify reel specifications and tape dimensions with your procurement requirements before ordering.

Q: What is the significance of the 11-turn specification?

A: The 11-turn specification defines the mechanical resolution and adjustment range of the potentiometer. This parameter must remain constant for equivalent performance in applications requiring precise resistance tuning.