ECS-F1EE336 Equivalent & Substitute Parts

Part Overview

The ECS-F1EE336 is a 33 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 discontinued status, identifying equivalent substitute parts with compatible electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

ECS-F1EE336

Panasonic Electronic ComponentsIn Stock: 1190ECS-F1EE336 Datasheet

Current PartRFQ

T350J336K025AS

KEMETIn Stock: 744T350J336K025AS Datasheet

DirectRFQ

TAP336K035CCS

KYOCERA AVXIn Stock: 1543TAP336K035CCS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECS-F1EE336 are qualified based on the following criteria:

Primary Compatibility Parameters:

• Capacitance value: 33 µF (exact match required)
• Voltage rating: Equal to or greater than 25 V
• Type: Conformal coated tantalum capacitor
• Mounting: Through hole radial configuration
• Lead spacing: 5.00mm nominal tolerance

Secondary Considerations:

• Tolerance: ±10% or tighter acceptable (tighter tolerance than original ±20%)
• Operating temperature range: Minimum -55°C ~ 105°C coverage
• Package dimensions: Physical fit within PCB layout constraints

Two substitute parts meet these criteria with active product status and improved specifications.

Parameter Comparison

Engineering Selection Recommendations

T350J336K025AS (KEMET T350 Series): This substitute provides exact voltage rating matching (25 V) with improved tolerance (±10% vs. ±20%). Operating temperature extends to 125°C, exceeding the original specification. Lead spacing is nominally compatible at 5.08mm. Physical dimensions are slightly larger (0.331" diameter, 0.500" height), requiring PCB layout verification. Product status is active with established supply chain availability. RoHS non-compliance matches the original part classification.

TAP336K035CCS (KYOCERA AVX TAP Series): This substitute offers elevated voltage rating (35 V) providing design margin above the 25 V requirement. Tolerance is ±10%, and operating temperature extends to 125°C. Lead spacing matches exactly at 5.00mm. Physical dimensions are larger (0.354" diameter, 0.571" height), requiring PCB layout clearance verification. Product status is active. ROHS3 compliance represents an improvement over the original non-compliant part, supporting regulatory requirements in new designs.

Both substitutes are functionally compatible for 33 µF, 25 V applications. Selection depends on PCB layout constraints and regulatory compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can T350J336K025AS directly replace ECS-F1EE336 in existing designs?

A: T350J336K025AS is electrically compatible with identical capacitance (33 µF) and voltage rating (25 V). Lead spacing is nominally compatible (5.08mm vs. 5.00mm). Physical dimensions are larger (0.331" diameter vs. 0.295" diameter), requiring verification that PCB layout accommodates the increased size. No circuit modifications are necessary.

Q: What is the advantage of TAP336K035CCS over the original ECS-F1EE336?

A: TAP336K035CCS provides three improvements: elevated voltage rating (35 V vs. 25 V) for design margin, tighter tolerance (±10% vs. ±20%) for precision applications, and ROHS3 compliance for regulatory alignment. Lead spacing matches exactly. Physical dimensions are larger and require PCB layout verification.

Q: Are there mechanical compatibility concerns with the substitute parts?

A: Both substitutes have larger diameters and heights than the original ECS-F1EE336. T350J336K025AS measures 0.331" diameter × 0.500" height; TAP336K035CCS measures 0.354" diameter × 0.571" height compared to the original 0.295" diameter × 0.492" height. PCB layout must be verified to ensure clearance around component placement and adjacent circuitry.

Q: Which substitute is recommended for new designs?

A: Selection depends on application requirements. For voltage-critical applications, TAP336K035CCS provides 35 V rating and ROHS3 compliance. For cost-optimized designs matching original specifications, T350J336K025AS provides exact 25 V rating with active product status. Both are conformal coated tantalum capacitors with through-hole radial mounting.

Q: Do the substitute parts have different ESR characteristics?

A: Yes. T350J336K025AS specifies 1.2 Ohm ESR; TAP336K035CCS specifies 1 Ohm ESR. The original ECS-F1EE336 does not specify ESR. Lower ESR in TAP336K035CCS may provide improved performance in high-frequency or low-impedance applications.

Q: What is the lead spacing tolerance for PCB design?

A: ECS-F1EE336 specifies 0.197" (5.00mm) lead spacing. T350J336K025AS specifies 0.200" (5.08mm); TAP336K035CCS specifies 0.197" (5.00mm). Standard PCB design tolerances accommodate these nominal variations. Verify footprint compatibility with your PCB design tool before layout finalization.