TMK107BJ334MA-T Equivalent & Substitute Parts

Part Overview

The TMK107BJ334MA-T is a 0.33 µF ±20% 25V ceramic capacitor manufactured by Taiyo Yuden in 0603 (1608 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) features X5R temperature coefficient and is designed for SMPS filtering applications. The part is marked as "Not For New Designs," indicating it has been superseded. Equivalent and substitute parts are necessary for ongoing production support, design flexibility, and inventory optimization while maintaining electrical and mechanical compatibility.

Substiute Parts

TMK107BJ334MA-T

Taiyo YudenIn Stock: 1008TMK107BJ334MA-T Datasheet

Current PartRFQ

C1608X5R1E334M080AC

TDK CorporationIn Stock: 6486C1608X5R1E334M080AC Datasheet

DirectRFQ

C1608X5R1E334K080AC

TDK CorporationIn Stock: 16114C1608X5R1E334K080AC Datasheet

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C1608X5R1H334K080AB

TDK CorporationIn Stock: 25655C1608X5R1H334K080AB Datasheet

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C1608X5R1H334M080AB

TDK CorporationIn Stock: 27643C1608X5R1H334M080AB Datasheet

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C1608X5R1V334K080AB

TDK CorporationIn Stock: 5193C1608X5R1V334K080AB Datasheet

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C1608X5R1V334M080AB

TDK CorporationIn Stock: 5764C1608X5R1V334M080AB Datasheet

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KGM15BR51E334KT

KYOCERA AVXIn Stock: 7202KGM15BR51E334KT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the TMK107BJ334MA-T is based on strict electrical and mechanical parameter matching:

Direct Equivalents (Same Electrical Specifications): Parts with identical capacitance (0.33 µF), voltage rating (25V), tolerance (±20%), temperature coefficient (X5R), and package (0603) are direct equivalents. These parts maintain full functional interchangeability.

Upgraded Substitutes (Enhanced Specifications): Parts with improved tolerance (±10% instead of ±20%) or higher voltage ratings (35V or 50V) are acceptable upgrades. These provide superior performance characteristics while maintaining the same capacitance, temperature coefficient, and package dimensions. Higher voltage ratings provide additional design margin; tighter tolerances improve circuit accuracy.

Critical Matching Parameters:

• Capacitance value must be 0.33 µF
• Package must be 0603 (1608 Metric)
• Temperature coefficient must be X5R
• Operating temperature range must be -55°C ~ 85°C
• Mounting type must be Surface Mount, MLCC
• RoHS3 compliance and MSL 1 rating required

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection: C1608X5R1E334M080AC (TDK Corporation) is the primary direct equivalent, offering identical electrical specifications to the TMK107BJ334MA-T with higher inventory availability (6475 units). Both parts maintain ±20% tolerance and 25V rating with X5R temperature coefficient in 0603 package. Both are ROHS3 compliant with MSL 1 rating.

Upgraded Substitute Selection: For applications requiring improved tolerance performance, C1608X5R1E334K080AC provides ±10% tolerance at 25V rating with significantly higher inventory (16045 units). This part is suitable for circuits where tighter capacitance accuracy is beneficial.

Higher Voltage Rating Substitutes: C1608X5R1H334K080AB and C1608X5R1H334M080AB offer 50V ratings, providing additional design margin for circuits operating at lower voltage levels. These parts are available in high quantities (25624 and 27586 units respectively) and support both ±10% and ±20% tolerance options.

C1608X5R1V334K080AB and C1608X5R1V334M080AB provide 35V ratings as intermediate voltage upgrades with ±10% and ±20% tolerance options respectively.

Active Product Alternative: KGM15BR51E334KT (KYOCERA AVX) is the only active product in this substitution group, offering ±10% tolerance at 25V rating. This part is recommended for new designs requiring ongoing long-term availability and support, with 7157 units in inventory.

All substitute parts maintain identical package dimensions (0603/1608 Metric), operating temperature range (-55°C ~ 85°C), and compliance certifications (ROHS3, MSL 1).

Frequently Asked Questions (FAQ)

Q: Can I use a 50V rated capacitor in place of the 25V TMK107BJ334MA-T? A: Yes. Higher voltage ratings are acceptable substitutes. The C1608X5R1H334K080AB and C1608X5R1H334M080AB (both 50V) provide additional voltage margin and are electrically compatible. The circuit will function identically; the higher voltage rating simply provides additional safety margin.

Q: What is the difference between ±20% and ±10% tolerance parts? A: Tolerance specifies the allowable deviation from the nominal 0.33 µF capacitance value. ±20% allows deviation from 0.264 µF to 0.396 µF, while ±10% allows deviation from 0.297 µF to 0.363 µF. Tighter tolerance (±10%) is beneficial for precision filtering circuits but not required for general SMPS filtering applications.

Q: Are all substitute parts in the same 0603 package? A: Yes. All listed substitute parts use the 0603 (1608 Metric) surface mount package with identical footprint dimensions (0.063" L x 0.031" W / 1.60mm x 0.80mm). Direct PCB footprint compatibility is maintained across all substitutes.

Q: Why is KGM15BR51E334KT marked as "Active" while others are "Not For New Designs"? A: KGM15BR51E334KT from KYOCERA AVX maintains active production status, indicating ongoing manufacturer support and long-term availability. Parts marked "Not For New Designs" are legacy products with limited future support. For new designs, KGM15BR51E334KT is the recommended choice.

Q: Do all substitute parts meet RoHS3 compliance? A: Yes. All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the original TMK107BJ334MA-T.

Q: Can I substitute a TDK part for the Taiyo Yuden original? A: Yes. C1608X5R1E334M080AC (TDK) is a direct equivalent with identical electrical and mechanical specifications. Both manufacturers produce MLCC components to industry standards, and the parts are functionally interchangeable in the same application.

Q: What is the significance of the X5R temperature coefficient? A: X5R specifies the capacitance change over temperature range (-55°C to +85°C), with maximum capacitance variation of ±15% across this range. This temperature coefficient is required for stable SMPS filtering performance and must be maintained in all substitutes.

Q: Are there any physical dimension differences between substitute parts? A: All parts share identical length and width (0.063" x 0.031" / 1.60mm x 0.80mm). Thickness varies slightly: TMK107BJ334MA-T and TDK parts are 0.035" (0.90mm) maximum, while KGM15BR51E334KT is 0.037" (0.95mm) maximum. This minor difference does not affect PCB assembly compatibility.