ECS-F1EE475K Equivalent & Substitute Parts

Part Overview

The ECS-F1EE475K is a 4.7 µF conformal coated tantalum capacitor rated at 25 V with radial through-hole mounting. Manufactured by Panasonic Electronic Components as part of the EF series, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing production support and design continuity.

Substiute Parts

ECS-F1EE475K

Panasonic Electronic ComponentsIn Stock: 979ECS-F1EE475K Datasheet

Current PartRFQ

T350C475K025AS

KEMETIn Stock: 1578T350C475K025AS Datasheet

DirectRFQ

TAP475K025SCS

KYOCERA AVXIn Stock: 3086TAP475K025SCS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECS-F1EE475K is determined by the following critical parameters:

• Capacitance value: 4.7 µF (exact match required)
• Voltage rating: 25 V (minimum requirement)
• Type: Conformal coated tantalum capacitor
• Mounting: Through hole radial configuration
• Operating temperature range: Must support -55°C to 105°C minimum

The substitute parts identified—T350C475K025AS (KEMET) and TAP475K025SCS (KYOCERA AVX)—meet all core electrical and mechanical requirements. Both are active production components with conformal coating, identical capacitance and voltage ratings, and compatible radial through-hole packages. Tolerance specifications differ (±10% vs. ±20%), and physical dimensions vary slightly, but these variations remain within acceptable substitution parameters for this product category.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are functionally equivalent to the ECS-F1EE475K based on electrical specifications. Selection between them should consider the following factors:

T350C475K025AS (KEMET T350 series) is an active production component with established supply availability. It maintains the same conformal coating specification and operating temperature range extended to 125°C. The ±10% tolerance provides improved capacitance accuracy compared to the original ±20% specification.

TAP475K025SCS (KYOCERA AVX TAP series) is an active production component with ROHS3 compliance, meeting modern regulatory requirements. It includes specified lifetime data (1000 Hrs @ 85°C) and REACH unaffected status. Lead spacing matches the original 0.098" (2.50mm) specification, reducing potential PCB layout modifications.

Physical dimensions of both substitutes are slightly larger than the original part. PCB layout verification is necessary to confirm clearance compatibility, particularly in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can T350C475K025AS or TAP475K025SCS be used as direct replacements for ECS-F1EE475K?

A: Both parts meet the core electrical requirements: 4.7 µF capacitance, 25 V rating, conformal coating, and through-hole radial mounting. Physical dimensions are slightly larger, requiring PCB layout verification before implementation.

Q: What is the difference between ±20% and ±10% tolerance?

A: The original ECS-F1EE475K has ±20% tolerance, meaning capacitance can range from 3.76 µF to 5.64 µF. The substitute parts have ±10% tolerance, ranging from 4.23 µF to 5.17 µF. The tighter tolerance of substitutes provides improved capacitance accuracy for circuit performance.

Q: Are there RoHS compliance differences?

A: The ECS-F1EE475K and T350C475K025AS are both RoHS non-compliant. TAP475K025SCS is ROHS3 compliant, meeting current environmental regulations. Selection depends on application regulatory requirements.

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

A: Lead spacing differs slightly: ECS-F1EE475K uses 0.098" (2.50mm), T350C475K025AS uses 0.100" (2.54mm), and TAP475K025SCS uses 0.098" (2.50mm). TAP475K025SCS matches the original lead spacing exactly. Physical diameter and height are larger for both substitutes, requiring clearance verification.

Q: What is ESR and why does it matter?

A: Equivalent Series Resistance (ESR) affects capacitor performance in high-frequency applications and ripple current handling. Both substitute parts specify 4 Ohm ESR, while the original part does not provide this specification. Lower ESR generally improves circuit stability.

Q: Which substitute should I choose?

A: Selection depends on application requirements. TAP475K025SCS is preferred for new designs requiring RoHS3 compliance and exact lead spacing match. T350C475K025AS is suitable for applications where RoHS compliance is not required and extended temperature range (to 125°C) is beneficial.