SM4W102 Equivalent & Substitute Parts

Part Overview

The SM4W102 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 top adjustment capability and a 12-turn configuration. The product is currently obsolete, making identification of suitable equivalent parts essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

SM4W102

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1164SM4W102 Datasheet

Current PartRFQ

PVG5A102C03R00

Bourns Inc.In Stock: 11025PVG5A102C03R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM4W102 is determined by strict equivalence across the following critical parameters:

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

The PVG5A102C03R00 from Bourns Inc. meets all critical substitution criteria. Minor variations in number of turns (11 vs. 12), temperature coefficient (±150ppm/°C vs. ±100ppm/°C), and face dimensions (0.189" x 0.138" vs. 0.193" x 0.146") are within acceptable engineering tolerances for this component category and do not prevent functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The PVG5A102C03R00 is the manufacturer-recommended substitute for the SM4W102. This substitution is supported by exact parameter matching across all critical electrical and mechanical specifications. The Bourns component offers additional advantages: active product status ensures ongoing availability and supply chain continuity, and ROHS3 compliance provides environmental regulatory alignment for new designs and manufacturing processes. The minor dimensional variation (approximately 0.004" and 0.008" reduction in face dimensions) is within standard PCB layout tolerances for surface mount components of this class.

Frequently Asked Questions (FAQ)

Q: Can the PVG5A102C03R00 be used as a direct replacement for the SM4W102 on existing PCBs?

A: Yes. The PVG5A102C03R00 is electrically and mechanically equivalent. The J Lead termination, surface mount configuration, and face dimensions are compatible with standard PCB layouts designed for the SM4W102. The slight reduction in face size (approximately 0.004" x 0.008") does not affect mounting or electrical performance.

Q: What is the significance of the 11-turn versus 12-turn difference?

A: Both configurations provide equivalent adjustment resolution for this resistance value and power rating. The 11-turn PVG5A102C03R00 delivers the same functional adjustment capability as the 12-turn SM4W102 within the tolerance and application requirements of this component class.

Q: Does the temperature coefficient difference (±150ppm/°C vs. ±100ppm/°C) affect substitution?

A: The PVG5A102C03R00 temperature coefficient of ±150ppm/°C remains within acceptable performance parameters for applications originally designed for the SM4W102. This specification difference does not prevent functional equivalence for standard trimmer potentiometer applications.

Q: Why is the SM4W102 listed as obsolete?

A: The SM4W102 has been discontinued by the manufacturer. The PVG5A102C03R00 is an active product from Bourns Inc., ensuring continued availability and supply chain support for equivalent functionality.

Q: Is the ROHS3 compliance of the PVG5A102C03R00 relevant for legacy system repairs?

A: ROHS3 compliance indicates environmental regulatory alignment and modern manufacturing standards. For legacy system repairs and maintenance, this compliance status does not affect electrical or mechanical compatibility but may be relevant for procurement and regulatory documentation purposes.