ECW-FE2W334KA Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECW-FE2W334KA is a 0.33 µF film capacitor manufactured by Panasonic Electronic Components, rated for 450V DC operation with polypropylene metallized dielectric. This radial through-hole component is designed for EMI/RFI suppression, high-frequency switching, and high pulse applications. The part is currently active in production with ROHS3 compliance and maintains 711 units in new original stock inventory.

Identifying equivalent and substitute parts is necessary when primary inventory becomes unavailable, when procurement lead times require alternative sourcing, or when design flexibility permits selection from qualified alternatives meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	0.33 µF
Tolerance	±10%
Voltage Rating - DC	450V
Dielectric Material	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Through Hole
Package / Case	Radial
Size / Dimension	0.512" L x 0.236" W (13.00mm x 6.00mm)
Height - Seated (Max)	0.472" (12.00mm)
Lead Spacing	0.394" (10.00mm)
Termination	PC Pins
Applications	EMI, RFI Suppression; High Frequency, Switching; High Pulse, DV/DT
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ECW-FE2W334KA is determined by strict equivalence across the following critical parameters:

Capacitance value: 0.33 µF (exact match required)
Tolerance: ±10% (exact match required)
DC voltage rating: 450V (exact match required)
Dielectric material: Polypropylene (PP), Metallized (exact match required)
Operating temperature range: -40°C ~ 105°C (exact match required)
Mounting type: Through Hole (exact match required)
Package type: Radial (exact match required)
Physical dimensions: 13.00mm x 6.00mm length and width (exact match required)
Lead spacing: 10.00mm (exact match required)
Termination style: PC Pins (exact match required)

The ECW-FE2W334K qualifies as a parametric equivalent based on matching all critical electrical and mechanical parameters. Both parts share the same base product number (ECW-FE) and series designation (ECWFE), confirming design compatibility within the Panasonic ECWFE film capacitor family.

Parameter Comparison

Parameter	ECW-FE2W334KA (Main Part)	ECW-FE2W334K (Substitute)
Manufacturer	Panasonic Electronic Components	Panasonic Electronic Components
Capacitance	0.33 µF	0.33 µF
Tolerance	±10%	±10%
Voltage Rating - DC	450V	450V
Dielectric Material	Polypropylene (PP), Metallized	Polypropylene (PP), Metallized
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C
Mounting Type	Through Hole	Through Hole
Package / Case	Radial	Radial
Size / Dimension	13.00mm x 6.00mm	13.00mm x 6.00mm
Height - Seated (Max)	12.00mm	12.00mm
Lead Spacing	10.00mm	10.00mm
Termination	PC Pins	PC Pins
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Series	ECWFE	ECWFE
Base Product Number	ECW-FE	ECW-FE

Engineering Selection Recommendations

Both the ECW-FE2W334KA and ECW-FE2W334K are active production parts manufactured by Panasonic Electronic Components with ROHS3 compliance certification. Selection between these parts is based on inventory availability and procurement requirements rather than electrical or mechanical performance differences.

The ECW-FE2W334K offers significantly higher inventory availability (5210 units in stock) compared to the ECW-FE2W334KA (711 units in stock), making it the preferred choice for applications requiring immediate procurement or high-volume orders. Both parts meet identical compliance requirements including ROHS3 status and REACH unaffected designation.

Frequently Asked Questions (FAQ)

Q: Can ECW-FE2W334K be used as a direct replacement for ECW-FE2W334KA?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters including capacitance, voltage rating, dielectric material, operating temperature range, physical dimensions, and lead spacing. Direct substitution is permissible in all applications.

Q: Are there any differences in performance between these two parts?

A: No performance differences exist. Both parts share identical electrical characteristics (0.33 µF, ±10%, 450V DC), dielectric composition (polypropylene metallized), temperature operating range (-40°C ~ 105°C), and mechanical specifications (radial through-hole, 13.00mm x 6.00mm, 10.00mm lead spacing).

Q: What is the significance of the different part number suffixes (KA vs K)?

A: The suffix variation reflects internal Panasonic product designation but does not indicate functional or performance differences. Both parts belong to the same ECWFE series and share the same base product number ECW-FE.

Q: Are both parts suitable for EMI/RFI suppression applications?

A: Yes. Both ECW-FE2W334KA and ECW-FE2W334K are specified for EMI/RFI suppression, high-frequency switching, and high pulse DV/DT applications.

Q: Do these parts require any special handling or storage considerations?

A: Both parts carry identical compliance designations (ROHS3 Compliant, REACH Unaffected, Moisture Sensitivity Level Not Applicable), indicating equivalent handling and storage requirements.

Q: Can these capacitors be used in AC applications?

A: These parts are rated for DC operation at 450V. The ECW-FE2W334K includes an AC voltage rating specification of 84V, while the ECW-FE2W334KA does not specify an AC rating. For AC applications, verify that the 84V AC rating of ECW-FE2W334K meets your circuit requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message