SM-3TB101 Equivalent & Substitute Parts

Part Overview

The SM-3TB101 is a 100 Ohm, 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. Equivalent parts are identified when identical electrical specifications and mechanical compatibility are maintained across alternative manufacturers.

Substiute Parts

SM-3TB101

Nidec Components CorporationIn Stock: 777SM-3TB101 Datasheet

Current PartRFQ

3223G-1-101E

Bourns Inc.In Stock: 15543223G-1-101E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM-3TB101 are qualified based on the following critical parameters:

• Resistance value: 100 Ohms (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)

The 3223G-1-101E from Bourns Inc. meets all electrical and functional specifications. Minor dimensional variations in the face geometry (rectangular vs. square) do not affect electrical performance or circuit functionality when PCB layout accommodates the substitute footprint.

Parameter Comparison

Engineering Selection Recommendations

Both the SM-3TB101 and 3223G-1-101E are Active status components with ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts should be based on:

• PCB layout constraints: The rectangular face dimension of the 3223G-1-101E (3.90mm x 3.18mm) differs from the square face of the SM-3TB101 (3.90mm x 3.90mm). Verify footprint compatibility with existing PCB designs.
• Supply chain availability: The 3223G-1-101E currently has higher inventory (1485 pcs) compared to SM-3TB101 (756 pcs).
• Regulatory requirements: Both parts meet ROHS3 compliance. The 3223G-1-101E is REACH Affected; the SM-3TB101 is REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can the 3223G-1-101E replace the SM-3TB101 in existing designs?

A: Electrical substitution is direct due to identical resistance, power rating, tolerance, temperature coefficient, and turn count. Physical substitution requires PCB layout verification due to the rectangular versus square face dimension difference.

Q: Are there differences in adjustment resolution between these parts?

A: Both parts feature 11-turn adjustment with side adjustment capability. Functional resolution is identical.

Q: What is the significance of the REACH Affected status for the 3223G-1-101E?

A: REACH Affected indicates the part is subject to REACH regulatory requirements. This does not affect electrical performance but may impact supply chain documentation and compliance reporting requirements.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage or handling.

Q: Is the rectangular footprint of the 3223G-1-101E compatible with square footprint PCB layouts?

A: Footprint compatibility depends on specific PCB design. The 3223G-1-101E is narrower in one dimension (3.18mm vs. 3.90mm). PCB layout review is required before substitution.