SM4A102 Equivalent & Substitute Parts

Part Overview

The SM4A102 is a 1 kOhms 0.25W surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This cermet-based component features J Lead termination with side adjustment capability and 12 turns of adjustment resolution. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Substiute Parts

SM4A102

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 932SM4A102 Datasheet

Current PartRFQ

PVG5H102C03R00

Bourns Inc.In Stock: 1359PVG5H102C03R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM4A102 is based on strict equivalence across the following critical parameters:

• Resistance value: 1 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±10%
• Adjustment type: Side Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Moisture sensitivity level: 1 (Unlimited)

The PVG5H102C03R00 from Bourns Inc. meets all these core substitution criteria. Minor variations in number of turns (11 vs. 12) and temperature coefficient (±150ppm/°C vs. ±100ppm/°C) remain within acceptable engineering tolerances for trimmer potentiometer applications. Physical dimensions are comparable (4.80mm x 3.70mm vs. 4.90mm x 3.70mm), ensuring mechanical compatibility in standard PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

The PVG5H102C03R00 is the primary substitute for the obsolete SM4A102. This selection is based on:

• Active product status: The Bourns component is currently in active production, ensuring long-term availability and supply chain stability.
• RoHS3 compliance: The substitute meets RoHS3 requirements, whereas the original SM4A102 is RoHS non-compliant. This compliance status is advantageous for new designs and regulatory adherence.
• REACH affected status: The PVG5H102C03R00 is REACH affected, indicating full regulatory documentation and traceability.
• Functional equivalence: All critical electrical parameters match or remain within acceptable tolerances for trimmer potentiometer applications.
• Mechanical compatibility: Physical dimensions and mounting characteristics ensure direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the PVG5H102C03R00 be used as a direct replacement for the SM4A102 in existing designs?

A: Yes. The substitute meets all core electrical and mechanical specifications. The 11-turn versus 12-turn difference and ±150ppm/°C versus ±100ppm/°C temperature coefficient variation are within acceptable tolerances for standard trimmer potentiometer applications. PCB footprints and mounting requirements are compatible.

Q: What is the significance of the temperature coefficient difference?

A: The SM4A102 specifies ±100ppm/°C while the PVG5H102C03R00 specifies ±150ppm/°C. This difference represents a wider temperature stability range in the substitute. For applications requiring tighter temperature stability, this parameter should be evaluated against circuit performance requirements.

Q: Does the 11-turn versus 12-turn adjustment difference affect functionality?

A: The reduction from 12 to 11 turns represents a minor decrease in adjustment resolution. Both configurations provide adequate fine-tuning capability for typical trimmer potentiometer applications. The practical impact depends on the specific adjustment sensitivity required by the circuit design.

Q: Why is RoHS3 compliance important for the substitute?

A: RoHS3 compliance ensures the component meets current environmental and hazardous substance restrictions. This is particularly relevant for new designs, products destined for regulated markets, and long-term supply chain sustainability.

Q: Are there packaging differences between the main part and substitute?

A: The SM4A102 packaging information is not specified in the available data. The PVG5H102C03R00 is supplied in Tape & Reel (TR) packaging, which is standard for surface mount trimmer potentiometers and suitable for automated assembly processes.