ECS-T1AX156R Equivalent & Substitute Parts

Part Overview

The ECS-T1AX156R is a 15 µF molded tantalum capacitor rated at 10 V with ±20% tolerance, manufactured by Panasonic Electronic Components in the TE series. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part is housed in a 1411 (3528 Metric) surface mount package with operating temperature range of -55°C to 125°C and unlimited moisture sensitivity level (MSL 1).

Substiute Parts

ECS-T1AX156R

Panasonic Electronic ComponentsIn Stock: 783ECS-T1AX156R Datasheet

Current PartRFQ

F931A156MBA

KYOCERA AVXIn Stock: 6704F931A156MBA Datasheet

DirectRFQ

TAJB156K020RNJ

KYOCERA AVXIn Stock: 3478TAJB156K020RNJ Datasheet

DirectRFQ

TAJB156M010RNJ

KYOCERA AVXIn Stock: 1929TAJB156M010RNJ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECS-T1AX156R are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 15 µF (exact match required)
• Voltage Rating: 10 V minimum (equal or higher acceptable)
• Tolerance: ±20% or tighter (±10% acceptable as improvement)
• Package / Case: 1411 (3528 Metric) footprint compatibility
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 125°C minimum
• Moisture Sensitivity Level: MSL 1 or better

Substitute Parts Identified:

1. TAJB156M010RNJ (KYOCERA AVX) – Direct electrical and mechanical equivalent with active product status
2. F931A156MBA (KYOCERA AVX) – Electrical equivalent with improved ESR specification and active product status
3. TAJB156K020RNJ (KYOCERA AVX) – Higher voltage rating (20 V) with tighter tolerance (±10%), suitable for applications with voltage margin requirements

Parameter Comparison

Engineering Selection Recommendations

TAJB156M010RNJ is the primary direct substitute, offering identical electrical specifications (15 µF, 10 V, ±20% tolerance) with active product status and ROHS3 compliance. This part maintains the same footprint and operating temperature range as the obsolete ECS-T1AX156R.

F931A156MBA provides an alternative with improved ESR performance (2 Ohm @ 100kHz) and active product status. The increased seated height (0.091" vs. 0.075") requires clearance verification in space-constrained applications.

TAJB156K020RNJ is suitable for designs requiring enhanced voltage margin or tighter tolerance specifications. The 20 V rating provides additional safety margin in applications subject to voltage transients, while the ±10% tolerance improves capacitance accuracy. The increased seated height (0.083") requires PCB layout verification.

All substitute parts are ROHS3 compliant and carry MSL 1 rating, meeting modern regulatory requirements where the original part does not.

Frequently Asked Questions (FAQ)

Q: Can TAJB156K020RNJ be used as a direct replacement for ECS-T1AX156R?

A: Yes. The 20 V rating is compatible with 10 V applications, providing voltage margin. The ±10% tolerance is tighter than the original ±20%, improving capacitance accuracy. Footprint and operating temperature range are identical.

Q: What is the impact of increased seated height on PCB design?

A: TAJB156M010RNJ has seated height of 0.083" (2.10mm) compared to the original 0.075" (1.90mm). F931A156MBA reaches 0.091" (2.30mm). Verify clearance with adjacent components and conformal coating processes if applicable.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts carry ROHS3 compliance. The original ECS-T1AX156R is RoHS non-compliant.

Q: What is the difference between TAJB156M010RNJ and F931A156MBA?

A: Both are 15 µF, 10 V, ±20% parts with identical footprint. F931A156MBA offers lower ESR (2 Ohm vs. 2.8 Ohm @ 100kHz) and includes lifetime specification (2000 Hrs @ 125°C). TAJB156M010RNJ is the direct electrical equivalent without ESR specification.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, provided PCB layout accommodates the maximum seated height of 0.091" (F931A156MBA). All parts share the same 1411 (3528 Metric) footprint and surface mount configuration.

Q: What is MSL 1 rating significance?

A: MSL 1 (Unlimited) indicates unlimited shelf life without moisture bake-out requirements. All parts, including the original, carry this rating.