ECS-T1DY684R Equivalent & Substitute Parts

Part Overview

The ECS-T1DY684R is a 0.68 µF molded tantalum capacitor manufactured by Panasonic Electronic Components, rated for 20 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C and features ±20% capacitance tolerance suitable for general-purpose applications.

Substiute Parts

ECS-T1DY684R

Panasonic Electronic ComponentsIn Stock: 1106ECS-T1DY684R Datasheet

Current PartRFQ

F931E684MAA

KYOCERA AVXIn Stock: 4481F931E684MAA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECS-T1DY684R is determined by the following critical parameters:

• Capacitance Value: Must be 0.68 µF (±20% tolerance acceptable)
• Voltage Rating: Substitute must meet or exceed 20 V rated voltage
• Package / Case: Must be 1206 (3216 Metric) surface mount
• Type: Molded tantalum construction
• Operating Temperature Range: Must support -55°C to 125°C minimum
• Moisture Sensitivity Level: MSL 1 or equivalent

The substitute part F931E684MAA from KYOCERA AVX meets all substitution criteria. It maintains identical capacitance, tolerance, package dimensions, and temperature range specifications. The substitute features a higher voltage rating (25 V versus 20 V), which provides additional design margin and is acceptable for direct substitution in applications requiring the original 20 V rating.

Parameter Comparison

Engineering Selection Recommendations

The F931E684MAA is a direct functional substitute for the ECS-T1DY684R based on matching electrical specifications and package compatibility. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

The F931E684MAA carries ROHS3 compliance and REACH unaffected status, providing regulatory advantages over the RoHS non-compliant original part. The elevated voltage rating (25 V) of the substitute creates additional design margin without affecting circuit performance in applications specified for 20 V operation.

Physical dimensions remain compatible within the 1206 package footprint. The maximum seated height increases by 0.008" (0.20mm) on the substitute part; this minor difference is within standard PCB assembly tolerances and does not impact board-level integration.

Frequently Asked Questions (FAQ)

Q: Can the F931E684MAA replace the ECS-T1DY684R in existing designs?

A: Yes. Both parts share identical capacitance (0.68 µF), tolerance (±20%), package (1206), and operating temperature range (-55°C to 125°C). The substitute's higher voltage rating (25 V) is compatible with circuits designed for 20 V operation.

Q: What is the significance of the voltage rating difference?

A: The substitute part's 25 V rating exceeds the original 20 V specification. This provides additional voltage margin and is acceptable for direct substitution. No circuit modifications are required.

Q: Are there physical compatibility concerns?

A: Both parts use the 1206 (3216 Metric) surface mount package with identical length and width (0.126" x 0.063"). The substitute's maximum seated height is 0.071" compared to 0.063" for the original—a 0.008" difference within standard assembly tolerances.

Q: What are the compliance differences?

A: The F931E684MAA is ROHS3 compliant and REACH unaffected, whereas the original ECS-T1DY684R is RoHS non-compliant. For applications requiring regulatory compliance, the substitute is the preferred choice.

Q: Is the substitute part readily available?

A: The F931E684MAA is in active production with 4400 pieces in stock, compared to the obsolete status of the original part. This ensures reliable procurement for new designs and ongoing production support.