TAJS156K004RNJ Equivalent & Substitute Parts

Part Overview

The TAJS156K004RNJ is a 15 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 4 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as Active product status and is designed for general purpose applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C. Substitute parts are identified when the original part becomes unavailable, when inventory constraints exist, or when design requirements permit operation at higher voltage ratings while maintaining identical capacitance, tolerance, and package specifications.

Substiute Parts

TAJS156K004RNJ

KYOCERA AVXIn Stock: 798TAJS156K004RNJ Datasheet

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TAJS156K006RNJ

KYOCERA AVXIn Stock: 1162TAJS156K006RNJ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TAJS156K004RNJ is permissible when the following conditions are met:

Critical Parameters for Substitution:

• Capacitance: 15 µF (must be identical)
• Tolerance: ±10% (must be identical)
• Type: Molded tantalum (must be identical)
• ESR: 4 Ohm (must be identical)
• Operating Temperature Range: -55°C ~ 125°C (must be identical or exceed)
• Mounting Type: Surface Mount (must be identical)
• Package / Case: 1206 (3216 Metric) (must be identical)
• Physical Dimensions: 0.126" L x 0.063" W, Height 0.047" max (must be identical)
• Manufacturer Size Code: S (must be identical)
• RoHS Status: ROHS3 Compliant (must be maintained)
• Moisture Sensitivity Level: 1 (Unlimited) (must be maintained)

Allowable Variation:

• Voltage - Rated: May be equal to or greater than 4 V, provided the circuit design permits operation at the higher voltage rating

The TAJS156K006RNJ qualifies as a direct substitute because it maintains all critical parameters while offering an increased voltage rating of 6.3 V, which is compatible with circuits designed for 4 V operation.

Parameter Comparison

Engineering Selection Recommendations

Both the TAJS156K004RNJ and TAJS156K006RNJ maintain Active product status and full compliance with ROHS3, REACH Unaffected, and EAR99 classifications. The TAJS156K006RNJ is suitable for direct substitution in applications where the circuit design operates at or below 4 V, as the higher voltage rating of 6.3 V provides additional safety margin without affecting capacitance, tolerance, ESR, or thermal performance. Selection between these parts should be based on inventory availability and circuit voltage requirements. Both components are manufactured by KYOCERA AVX and share identical mechanical and electrical characteristics except for voltage rating.

Frequently Asked Questions (FAQ)

Q: Can TAJS156K006RNJ replace TAJS156K004RNJ in all applications?

A: Yes, provided the circuit design operates at or below 4 V. The TAJS156K006RNJ has a higher voltage rating (6.3 V) and identical capacitance, tolerance, ESR, package dimensions, and operating temperature range. Higher voltage rating does not degrade performance in lower voltage applications.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 1206 (3216 Metric) package with dimensions of 0.126" L x 0.063" W and maximum seated height of 0.047". They are mechanically interchangeable on PCB layouts.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both TAJS156K004RNJ and TAJS156K006RNJ have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What is the significance of the ESR value in substitution?

A: ESR (Equivalent Series Resistance) of 4 Ohm is a critical electrical parameter that affects circuit performance, particularly in filtering and ripple current applications. Both parts maintain identical ESR, ensuring equivalent electrical behavior in the circuit.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and classified as EAR99. They share identical regulatory and environmental compliance status.