TMK042CG4R3CD-W Equivalent & Substitute Parts

Part Overview

The TMK042CG4R3CD-W is a 4.3 pF ceramic capacitor manufactured by Taiyo Yuden, rated for 25V with C0G/NP0 temperature coefficient characteristics. This component is packaged in 01005 (0402 Metric) form factor as a surface-mount multilayer ceramic capacitor (MLCC). The part is designated as "Not For New Designs," indicating its obsolescence status. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate production continuity, and enable migration to active product lines where applicable.

Substiute Parts

TMK042CG4R3CD-W

Taiyo YudenIn Stock: 619TMK042CG4R3CD-W Datasheet

Current PartRFQ

TMK042CG4R3BD-W

Taiyo YudenIn Stock: 2146TMK042CG4R3BD-W Datasheet

UpgradeRFQ

MLAST042SCG4R3CWNA01

Taiyo YudenIn Stock: 963MLAST042SCG4R3CWNA01 Datasheet

Parametric EquivalentRFQ

MSART042SCG4R3CWRA01

Taiyo YudenIn Stock: 715MSART042SCG4R3CWRA01 Datasheet

Parametric EquivalentRFQ

MSAST042SCG4R3CWNA01

Taiyo YudenIn Stock: 790MSAST042SCG4R3CWNA01 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMK042CG4R3CD-W is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Capacitance: 4.3 pF
• Voltage Rating: 25V
• Temperature Coefficient: C0G, NP0
• Package / Case: 01005 (0402 Metric)
• Operating Temperature Range: -55°C ~ 125°C
• Mounting Type: Surface Mount, MLCC
• Physical Dimensions: 0.016" L x 0.008" W (0.40mm x 0.20mm)
• Moisture Sensitivity Level: 1 (Unlimited)

Tolerance Consideration: The main part specifies ±0.25 pF tolerance. One substitute (TMK042CG4R3BD-W) offers tighter tolerance at ±0.1 pF, which is a functional upgrade. All other substitutes maintain ±0.25 pF tolerance matching the original specification.

Packaging Format Variation: The main part is supplied in Tape & Reel (TR) format. One substitute (TMK042CG4R3BD-W) is available in Cut Tape (CT) format. Both formats are compatible for component placement and assembly operations.

Product Status Variation: The main part and one substitute (TMK042CG4R3BD-W) are designated "Not For New Designs." Three substitutes (MLAST042SCG4R3CWNA01, MSART042SCG4R3CWRA01, MSAST042SCG4R3CWNA01) carry "Active" product status, indicating ongoing manufacturer support and availability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Obsolescence Support): TMK042CG4R3BD-W serves as a direct upgrade substitute for TMK042CG4R3CD-W. Both parts maintain identical electrical specifications and physical form factor. The upgrade offers improved tolerance performance (±0.1 pF versus ±0.25 pF) while retaining all compliance certifications including ROHS3 compliance. Packaging format differs (Cut Tape versus Tape & Reel), which affects supply chain logistics but not functional compatibility.

For New Design Migration: MLAST042SCG4R3CWNA01, MSART042SCG4R3CWRA01, and MSAST042SCG4R3CWNA01 are recommended for new designs and long-term production continuity. All three parts carry "Active" product status, ensuring ongoing manufacturer support and stable supply. These parts maintain complete electrical and mechanical equivalence to the original specification while offering superior lifecycle support.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. MLAST042SCG4R3CWNA01, MSART042SCG4R3CWRA01, and MSAST042SCG4R3CWNA01 include REACH Unaffected status documentation, providing additional regulatory assurance for applications requiring enhanced compliance verification.

Series Selection:

• M and MSAR series: General Purpose applications
• MLAS series: Medical and Non-Critical applications

Selection between active substitutes should be based on application requirements and supply chain availability rather than electrical performance, as all three active alternatives are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can TMK042CG4R3BD-W directly replace TMK042CG4R3CD-W in existing assemblies?

A: Yes. TMK042CG4R3BD-W is a direct functional replacement. Both parts share identical capacitance (4.3 pF), voltage rating (25V), temperature coefficient (C0G/NP0), package form factor (01005/0402 Metric), and physical dimensions. The substitute offers tighter tolerance (±0.1 pF) as an upgrade feature. Packaging format differs (Cut Tape versus Tape & Reel), affecting supply logistics only.

Q: What is the difference between the active substitutes (MLAST042SCG4R3CWNA01, MSART042SCG4R3CWRA01, MSAST042SCG4R3CWNA01)?

A: All three active substitutes are electrically and mechanically identical to the original part. Differences exist only in manufacturer series designation (MLAS, MSAR, MSAS respectively) and intended application classification. MLAST042SCG4R3CWNA01 is designated for Medical and Non-Critical applications, while MSART042SCG4R3CWRA01 and MSAST042SCG4R3CWNA01 are designated for General Purpose applications. Selection should be based on application requirements and supply availability.

Q: Why is the original TMK042CG4R3CD-W marked "Not For New Designs"?

A: This designation indicates the part is in obsolescence phase. Taiyo Yuden continues to support existing production but does not recommend this part for new circuit designs. Active alternatives (MLAST042SCG4R3CWNA01, MSART042SCG4R3CWRA01, MSAST042SCG4R3CWNA01) provide equivalent performance with ongoing manufacturer support and guaranteed long-term availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance certification, matching the original part's regulatory status.

Q: Does packaging format (Tape & Reel versus Cut Tape) affect component performance?

A: No. Packaging format affects supply chain logistics and assembly line handling only. Electrical and mechanical performance is identical regardless of packaging format. TMK042CG4R3BD-W (Cut Tape) and all Tape & Reel alternatives are functionally equivalent.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity limitations. Storage and handling do not require special moisture control measures, simplifying logistics and reducing component damage risk during supply chain operations.

Q: Can I use MLAST042SCG4R3CWNA01 in a general purpose application instead of MSAST042SCG4R3CWNA01?

A: Yes. Although MLAST042SCG4R3CWNA01 is designated for Medical and Non-Critical applications, it is electrically and mechanically identical to general purpose alternatives. Application designation reflects intended market segment rather than functional capability. Component selection should prioritize supply availability and cost considerations.

Q: Are all parts manufactured by Taiyo Yuden?

A: Yes. All parts listed (main part and all substitutes) are manufactured by Taiyo Yuden, ensuring consistent quality standards and manufacturing processes across the product family.