ECS-T1AY475R Equivalent & Substitute Parts

Part Overview

The ECS-T1AY475R is a 4.7 µF molded tantalum capacitor rated at 10 V with ±20% tolerance in a 1206 (3216 Metric) surface mount package, manufactured by Panasonic Electronic Components. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across capacitance, voltage rating, tolerance, and physical package specifications.

Key Parameters

Parameter	Value
Capacitance	4.7 µF
Voltage Rating	10 V
Tolerance	±20%
Package / Case	1206 (3216 Metric)
Type	Molded Tantalum
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)
Height - Seated (Max)	0.063" (1.60mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 4.7 µF (exact match required)
Voltage Rating: 10 V minimum (equal or higher acceptable)
Tolerance: ±20% or tighter (±10% acceptable as improvement)
Package / Case: 1206 (3216 Metric) (exact match required)
Type: Molded Tantalum (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

Substitute Classification:

Direct Substitutes (all primary criteria met):

F931A475MAA (KYOCERA AVX) — Identical electrical and mechanical specifications
TAJA475M010RNJ (KYOCERA AVX) — Identical electrical and mechanical specifications
293D475X0010A2TE3 (Vishay Sprague) — Identical electrical and mechanical specifications

Functional Substitute (voltage rating exceeds requirement):

TAJA475K020RNJ (KYOCERA AVX) — 20 V rating provides additional design margin; tolerance improved to ±10%

Parameter Comparison

Parameter	ECS-T1AY475R	F931A475MAA	TAJA475M010RNJ	TAJA475K020RNJ	293D475X0010A2TE3
Manufacturer	Panasonic	KYOCERA AVX	KYOCERA AVX	KYOCERA AVX	Vishay Sprague
Capacitance	4.7 µF	4.7 µF	4.7 µF	4.7 µF	4.7 µF
Voltage Rating	10 V	10 V	10 V	20 V	10 V
Tolerance	±20%	±20%	±20%	±10%	±20%
Package / Case	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)	1206 (3216 Metric)
Type	Molded	Molded	Molded	Molded	Molded
ESR @ 100kHz	—	4 Ohm	5 Ohm	4 Ohm	5 Ohm
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Height - Seated (Max)	0.063" (1.60mm)	0.071" (1.80mm)	0.071" (1.80mm)	0.071" (1.80mm)	0.071" (1.80mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

F931A475MAA, TAJA475M010RNJ, and 293D475X0010A2TE3 are electrically and mechanically equivalent to the ECS-T1AY475R. All three are active products with ROHS3 compliance, providing regulatory advantage over the obsolete original part. Selection among these three should be based on availability, lead time, and procurement cost.

For Enhanced Design Margin:

TAJA475K020RNJ provides a 20 V voltage rating compared to the 10 V requirement, delivering additional safety margin in the circuit. The tolerance is improved to ±10%, reducing capacitance variation. This part is suitable for applications where voltage transients or design margin enhancement is beneficial. Height increase from 0.063" to 0.071" must be verified against PCB layout constraints.

Compliance Consideration:

All substitute parts are ROHS3 compliant, whereas the original ECS-T1AY475R is non-compliant. This transition supports regulatory requirements for new production and design updates.

Frequently Asked Questions (FAQ)

Q: Can TAJA475K020RNJ be used in place of ECS-T1AY475R?

A: Yes. TAJA475K020RNJ meets all primary substitution criteria with identical capacitance, tolerance, package, and operating temperature range. The 20 V rating exceeds the 10 V requirement, providing additional design margin. The ±10% tolerance is tighter than the original ±20%, improving capacitance accuracy. Physical height increases from 0.063" to 0.071", which must be confirmed against PCB clearance requirements.

Q: What is the difference between F931A475MAA and TAJA475M010RNJ?

A: Both parts are direct substitutes with identical electrical specifications (4.7 µF, 10 V, ±20%). The primary difference is ESR: F931A475MAA specifies 4 Ohm @ 100kHz, while TAJA475M010RNJ specifies 5 Ohm. Both are within acceptable ranges for general-purpose tantalum capacitor applications. Selection should be based on availability and procurement preference.

Q: Why is the seated height different between the original and substitute parts?

A: The original ECS-T1AY475R has a maximum seated height of 0.063" (1.60mm), while all substitute parts measure 0.071" (1.80mm). This 0.008" (0.20mm) increase is within typical PCB design tolerances but must be verified against component placement constraints, solder joint clearance, and any height-restricted applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All four substitute parts (F931A475MAA, TAJA475M010RNJ, TAJA475K020RNJ, and 293D475X0010A2TE3) are ROHS3 compliant. The original ECS-T1AY475R is non-compliant, making substitution necessary for regulatory compliance in new designs and production updates.

Q: Can I use 293D475X0010A2TE3 if my design requires Tape & Reel packaging?

A: Yes. 293D475X0010A2TE3 is supplied in Tape & Reel (TR) packaging, meeting this requirement. F931A475MAA and TAJA475M010RNJ are available in both Cut Tape (CT) and Digi-Reel® packaging options. Packaging format should be confirmed with your supplier based on production requirements.

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