ECS-T1DX475R Equivalent & Substitute Parts

Part Overview

The ECS-T1DX475R is a 4.7 µF molded tantalum capacitor rated at 20 V, manufactured by Panasonic Electronic Components in the TE series. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part is housed in a 1411 (3528 Metric) surface mount package with general purpose application characteristics.

Key Parameters

Parameter	Value
Capacitance	4.7 µF
Voltage Rating	20 V
Tolerance	±20%
Package / Case	1411 (3528 Metric)
Type	Molded Tantalum
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ECS-T1DX475R is determined by the following critical parameters:

Capacitance Value: Must be 4.7 µF
Voltage Rating: Must be ≥ 20 V (higher voltage ratings are acceptable)
Package / Case: Must be 1411 (3528 Metric)
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must support -55°C ~ 125°C
Type: Molded Tantalum

Substitute parts are classified into two categories:

Direct Equivalents maintain identical electrical specifications (4.7 µF, 20 V, ±20% tolerance) with active product status and modern compliance certifications.

Compatible Alternatives meet all critical parameters but may differ in tolerance (±10% vs ±20%) or voltage rating (25 V vs 20 V), remaining functionally suitable for the application.

Parameter Comparison

Parameter	ECS-T1DX475R	F931D475MBA	TAJB475M020RNJ	TAJB475K025RNJ	293D475X0020B2TE3	293D475X9020B2TE3
Manufacturer	Panasonic	KYOCERA AVX	KYOCERA AVX	KYOCERA AVX	Vishay Sprague	Vishay Sprague
Capacitance	4.7 µF	4.7 µF	4.7 µF	4.7 µF	4.7 µF	4.7 µF
Voltage Rating	20 V	20 V	20 V	25 V	20 V	20 V
Tolerance	±20%	±20%	±20%	±10%	±20%	±10%
Package / Case	1411 (3528 Metric)	1411 (3528 Metric)	1411 (3528 Metric), 1210	1411 (3528 Metric), 1210	1411 (3528 Metric)	1411 (3528 Metric)
Height - Seated (Max)	0.075" (1.90mm)	0.091" (2.30mm)	0.083" (2.10mm)	0.083" (2.10mm)	0.083" (2.11mm)	0.083" (2.11mm)
ESR (Equivalent Series Resistance)	—	2.8Ohm @ 100kHz	3Ohm	1.5Ohm	2.9Ohm	2.9Ohm
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalents for ECS-T1DX475R Replacement:

F931D475MBA, TAJB475M020RNJ, and 293D475X0020B2TE3 are direct electrical equivalents with identical capacitance (4.7 µF), voltage rating (20 V), and tolerance (±20%). All three are active products with ROHS3 compliance and REACH unaffected status, providing modern supply chain continuity. These parts are suitable for direct substitution in existing designs without circuit modification.

Compatible Alternative with Enhanced Tolerance:

TAJB475K025RNJ maintains the 4.7 µF capacitance and 1411 package but operates at 25 V with ±10% tolerance. The higher voltage rating provides additional design margin, and the tighter tolerance improves circuit performance. This part is suitable where the application can accommodate the increased voltage rating.

Compatible Alternative with Tighter Tolerance:

293D475X9020B2TE3 matches the ECS-T1DX475R in capacitance, voltage, and package but offers ±10% tolerance instead of ±20%. This part is suitable for applications requiring improved capacitance accuracy.

All substitute parts maintain the required operating temperature range (-55°C ~ 125°C), surface mount configuration, and MSL 1 rating. Selection should prioritize active product status and modern compliance certifications for long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can TAJB475K025RNJ be used as a direct replacement for ECS-T1DX475R?

A: Yes. Although TAJB475K025RNJ operates at 25 V versus the original 20 V rating, the higher voltage rating is compatible with circuits designed for 20 V operation. The ±10% tolerance is tighter than the original ±20%, which may improve circuit performance. All other critical parameters (4.7 µF capacitance, 1411 package, surface mount, operating temperature range) are identical.

Q: What is the difference between the Vishay Sprague 293D475X0020B2TE3 and 293D475X9020B2TE3?

A: Both parts are identical except for tolerance. The 293D475X0020B2TE3 has ±20% tolerance matching the original ECS-T1DX475R, while the 293D475X9020B2TE3 has ±10% tolerance. Selection depends on circuit tolerance requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, whereas the original ECS-T1DX475R is RoHS non-compliant. This compliance upgrade is beneficial for modern manufacturing and regulatory requirements.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the 1411 (3528 Metric) package with identical length (0.138" / 4.60mm) and width (0.110" / 2.80mm). Height variations are minor (1.90mm to 2.30mm maximum seated height) and do not affect PCB layout compatibility for standard surface mount applications.

Q: Which substitute part has the lowest ESR?

A: TAJB475K025RNJ has the lowest ESR at 1.5Ohm. The other active substitutes range from 2.8Ohm to 2.9Ohm. Lower ESR may be beneficial in high-frequency or high-current applications.

Q: Is the ECS-T1DX475R still available?

A: The ECS-T1DX475R is classified as obsolete. While 1071 pieces are listed as in stock, long-term availability is not assured. Migration to an active substitute part is recommended for new designs and ongoing production.

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