SM4A202 Equivalent & Substitute Parts

Part Overview

The SM4A202 is a 2 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 a 12-turn configuration. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SM4A202

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 928SM4A202 Datasheet

Current PartRFQ

PVG5H202C03R00

Bourns Inc.In Stock: 2961PVG5H202C03R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM4A202 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2 kOhms (exact match required)
• Power rating: 0.25W, 1/4W (exact match required)
• Tolerance: ±10% (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Surface Mount (exact match required)
• Termination style: J Lead (exact match required)
• Adjustment type: Side Adjustment (exact match required)

The PVG5H202C03R00 from Bourns Inc. meets all critical substitution criteria. Minor variations in number of turns (11 vs. 12) and temperature coefficient (±150ppm/°C vs. ±100ppm/°C) are within acceptable engineering tolerances for this component category and do not preclude functional equivalence in standard applications.

Parameter Comparison

Engineering Selection Recommendations

The PVG5H202C03R00 is the direct functional equivalent for SM4A202 replacement. Selection is based on the following engineering factors:

Product Status: The SM4A202 is obsolete with no ongoing manufacturing. The PVG5H202C03R00 is active production, ensuring long-term availability and supply chain continuity.

Compliance: The substitute part is ROHS3 compliant, whereas the original is non-compliant. For applications subject to RoHS regulations, the PVG5H202C03R00 provides regulatory alignment. For legacy systems without RoHS requirements, both parts remain functionally equivalent.

Electrical Equivalence: All critical electrical parameters match exactly. The 1-turn reduction (11 vs. 12) and increased temperature coefficient (±150ppm/°C vs. ±100ppm/°C) represent minor variations that do not affect functional performance in standard potentiometer applications.

Physical Compatibility: Dimensional variation is minimal (0.10mm width difference). Both parts maintain identical height and J Lead termination, ensuring PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can PVG5H202C03R00 be used as a direct replacement for SM4A202?

A: Yes. Both parts share identical resistance, power rating, tolerance, resistive material, mounting type, termination style, and adjustment type. The substitute is functionally equivalent and physically compatible with SM4A202 PCB layouts.

Q: What is the significance of the 1-turn difference (11 vs. 12)?

A: The number of turns affects adjustment resolution. The PVG5H202C03R00 with 11 turns provides slightly coarser adjustment granularity compared to the 12-turn SM4A202. For applications requiring fine-tuning precision, this difference should be evaluated against specific circuit requirements.

Q: Does the temperature coefficient difference affect performance?

A: The PVG5H202C03R00 has a ±150ppm/°C coefficient versus ±100ppm/°C for the SM4A202. This represents a 50ppm/°C increase in temperature sensitivity. For applications operating across wide temperature ranges or requiring high stability, this parameter should be verified against circuit specifications.

Q: Are there packaging differences?

A: The SM4A202 packaging is not specified in available data. The PVG5H202C03R00 is supplied in Tape & Reel (TR) format. Confirm packaging requirements with your procurement process.

Q: Is the size difference significant?

A: The PVG5H202C03R00 is 0.10mm narrower (4.80mm vs. 4.90mm). This minimal difference does not affect standard PCB footprint compatibility. Verify against your specific PCB layout constraints if space is critical.

Q: What about RoHS compliance?

A: The SM4A202 is RoHS non-compliant. The PVG5H202C03R00 is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute provides compliance alignment.