SM4W103 Equivalent & Substitute Parts

Part Overview

The SM4W103 is a 10 kOhms surface mount trimmer potentiometer manufactured by Vishay Beyschlag/Draloric/BC Components. This component features 0.25W power rating, 12-turn top adjustment, and cermet resistive material with J lead termination. The product is currently obsolete, necessitating identification of functionally equivalent active alternatives for new designs and ongoing production requirements.

Substiute Parts

SM4W103

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 848SM4W103 Datasheet

Current PartRFQ

3224W-1-103E

Bourns Inc.In Stock: 339063224W-1-103E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SM4W103 is determined by strict equivalence across the following critical parameters:

• Resistance value: 10 kOhms
• Power rating: 0.25W (1/4W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 12
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Surface Mount
• Termination style: J Lead
• Moisture sensitivity level: 1 (Unlimited)

The 3224W-1-103E from Bourns Inc. meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent. Minor dimensional variation (0.189" x 0.138" versus 0.193" x 0.146") remains within acceptable tolerance for surface mount applications with identical J lead termination.

Parameter Comparison

Engineering Selection Recommendations

The 3224W-1-103E represents the primary substitute for the obsolete SM4W103. Selection is based on:

• Complete electrical parameter equivalence across resistance, power rating, tolerance, and temperature coefficient
• Identical mechanical configuration: 12-turn top adjustment cermet trimmer with J lead surface mount termination
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance providing regulatory advantage for new designs and production environments requiring environmental standards adherence
• Established Bourns Trimpot® 3224 series platform with documented reliability and manufacturing consistency

The minor dimensional reduction (approximately 0.004" and 0.008" in respective axes) does not impact functional performance or PCB layout compatibility for standard surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the 3224W-1-103E be used as a direct replacement for SM4W103 in existing designs?

A: Yes. The 3224W-1-103E meets all electrical specifications (10 kOhms, 0.25W, ±10% tolerance, ±100ppm/°C) and mechanical requirements (12-turn top adjustment, cermet material, J lead termination, surface mount). The minor dimensional difference does not affect PCB footprint compatibility.

Q: What is the significance of the product status difference?

A: The SM4W103 is obsolete, meaning Vishay no longer manufactures or supports this component. The 3224W-1-103E is active, ensuring reliable supply, technical support, and continued manufacturing consistency from Bourns.

Q: Does RoHS compliance affect substitution suitability?

A: The 3224W-1-103E is ROHS3 compliant, while the SM4W103 is non-compliant. For new designs and production environments subject to environmental regulations, the 3224W-1-103E provides regulatory alignment. For legacy systems without RoHS requirements, both components remain functionally equivalent.

Q: Are there packaging differences between these parts?

A: The SM4W103 packaging information is not specified in available data. The 3224W-1-103E is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, standard for high-volume surface mount applications.

Q: What tolerance should be expected when substituting these components?

A: Both components specify ±10% resistance tolerance and ±100ppm/°C temperature coefficient. No performance degradation occurs with substitution.