ECS-F1CE105K Equivalent & Substitute Parts

Part Overview

The ECS-F1CE105K is a 1 µF conformal coated tantalum capacitor rated at 16 V with ±20% tolerance, manufactured by Panasonic Electronic Components in the EF series. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and production continuity. Conformal coated radial tantalum capacitors in this capacitance and voltage range are widely available from multiple manufacturers, enabling direct functional replacement with parts meeting or exceeding the original specifications.

Key Parameters

Parameter	Value
Capacitance	1 µF
Voltage Rating	16 V
Tolerance	±20%
Type	Conformal Coated
Mounting Type	Through Hole
Package / Case	Radial
Operating Temperature Range	-55°C ~ 105°C
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the ECS-F1CE105K is determined by the following critical parameters:

Capacitance: Must be 1 µF (exact match required)
Voltage Rating: Must be ≥16 V (higher ratings provide design margin)
Type: Must be conformal coated tantalum capacitor
Mounting Type: Must be through hole radial configuration
Operating Temperature Range: Must support -55°C ~ 105°C minimum
Tolerance: ±10% or better is acceptable (tighter than original ±20%)

All substitute parts listed meet or exceed these parameters. Substitute parts with higher voltage ratings (20 V or 25 V) and improved tolerance specifications (±10%) provide enhanced reliability margins while maintaining full functional compatibility.

Parameter Comparison

Parameter	ECS-F1CE105K (Main)	T350A105K025AS	TAP105K020SCS	199D105X9025A1V1E3	T350A105K025AT
Manufacturer	Panasonic	KEMET	KYOCERA AVX	Vishay Sprague	KEMET
Capacitance	1 µF	1 µF	1 µF	1 µF	1 µF
Voltage Rating	16 V	25 V	20 V	25 V	25 V
Tolerance	±20%	±10%	±10%	±10%	±10%
Type	Conformal Coated	Conformal Coated	Conformal Coated	Conformal Coated	Conformal Coated
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
ESR	—	10 Ohm	10 Ohm	—	10 Ohm
RoHS Status	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

TAP105K020SCS (KYOCERA AVX) is the primary recommended substitute. This part maintains the original 20 V voltage specification while providing ±10% tolerance, improved operating temperature range (-55°C ~ 125°C), and ROHS3 compliance. Lead spacing matches the original at 0.098" (2.50mm), ensuring direct PCB compatibility without layout modifications.

T350A105K025AS and T350A105K025AT (KEMET) offer 25 V rated alternatives with enhanced voltage margin. Both parts are active products with ROHS3 compliance (T350A105K025AT) or non-compliant status (T350A105K025AS). These parts feature slightly larger physical dimensions (0.177" diameter vs. 0.130" original) and 0.100" lead spacing, requiring PCB footprint verification before selection.

199D105X9025A1V1E3 (Vishay Sprague TANTALEX™ series) provides a 25 V rated option with ROHS3 compliance and documented 1000 Hrs @ 85°C lifetime rating. Physical dimensions (0.173" diameter, 0.100" lead spacing) fall between the original and KEMET alternatives, requiring footprint assessment.

For new designs prioritizing regulatory compliance, TAP105K020SCS, T350A105K025AT, or 199D105X9025A1V1E3 are preferred. For legacy production requiring closest physical match, TAP105K020SCS is optimal.

Frequently Asked Questions (FAQ)

Q: Can I use a 25 V rated substitute in place of the 16 V original?

A: Yes. Higher voltage ratings provide design margin and are functionally compatible. The 25 V substitutes (T350A105K025AS, T350A105K025AT, 199D105X9025A1V1E3) will operate correctly in circuits designed for 16 V components.

Q: What is the significance of ±10% tolerance versus ±20%?

A: The substitute parts offer tighter tolerance specifications, reducing capacitance variation across production batches. This improves circuit performance predictability without introducing incompatibility.

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

A: TAP105K020SCS maintains the original lead spacing (0.098" / 2.50mm) and is the best footprint match. KEMET and Vishay alternatives use 0.100" (2.54mm) lead spacing and larger body diameters, requiring PCB verification before substitution.

Q: Are all substitute parts RoHS compliant?

A: TAP105K020SCS, T350A105K025AT, and 199D105X9025A1V1E3 are ROHS3 compliant. T350A105K025AS is RoHS non-compliant. Select compliant alternatives for applications requiring regulatory adherence.

Q: What is the operating temperature advantage of the substitutes?

A: Substitute parts support -55°C ~ 125°C, extending the upper operating limit by 20°C compared to the original -55°C ~ 105°C specification. This provides additional thermal margin in high-temperature applications.

Q: Can I interchange T350A105K025AS and T350A105K025AT?

A: Both are KEMET T350 series 1 µF 25 V parts with identical electrical specifications. The primary difference is RoHS compliance status (T350A105K025AT is compliant). Electrical and physical compatibility is equivalent.

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