ECW-U2474KCV Panasonic Capacitor (Capacitor Chip Non-polarised) In Stock
The ECW-U2474KCV by Panasonic is a 0.47 µF 250 V metallized polyester (PEN) film capacitor in a 3931 SMD case size with ±10% tolerance. It delivers high voltage film capacitance for AC filtering, snubber, and EMI suppression circuits in power conversion and motor drive applications requiring stable, non-polarized dielectric performance.
- Manufacturer
- Panasonic
- Package
- Capacitor Chip Non-polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ECW-U2474KCV Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.47 µF capacitance at 250 V rating providing robust film energy storage for high-voltage AC filtering and snubber circuit protection
- Metallized polyester (PEN) film dielectric offering self-healing capability and stable capacitance across frequency and temperature variations
- Non-polarized 3931 SMD chip form factor enabling surface-mount assembly on both AC and DC circuit nodes without polarity concerns
Applications
The ECW-U2474KCV is suited for AC line filtering, snubber networks across power switches, and EMI suppression circuits in switch-mode power supplies, inverters, and motor drive controllers operating at voltages up to 250 V. Its 0.47 µF PEN film construction provides self-healing performance and low ESR compared to electrolytic capacitors, making it reliable in high-frequency resonant converter and class-D amplifier output filter stages. The compact 3931 SMD package enables fully automated surface-mount assembly in industrial and consumer power electronics.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What capacitance, voltage rating, and tolerance does the ECW-U2474KCV film capacitor offer?
The ECW-U2474KCV is rated at 0.47 µF with a 250 V voltage rating and ±10% capacitance tolerance. The metallized polyester (PEN) film dielectric provides stable capacitance across a wide frequency range, making it appropriate for resonant snubber networks, EMI filtering, and power factor correction circuits where consistent 0.47 µF performance at elevated voltages is required.
For a MOSFET snubber network in a 200 V buck converter, why is the ECW-U2474KCV preferable to a ceramic or electrolytic capacitor?
The ECW-U2474KCV's 250 V metallized film construction is inherently self-healing and non-polarized, withstanding repetitive high-frequency voltage transients across MOSFET drain-source nodes that would cause ceramic capacitors to crack or electrolytic capacitors to degrade. At 0.47 µF and 250 V, it absorbs the inductive energy spike during MOSFET turn-off in a 200 V converter without piezoelectric noise or polarity constraints, providing a more robust and reliable snubber solution.
How does the 3931 SMD case size of the ECW-U2474KCV compare to equivalent through-hole film capacitors for board layout?
The ECW-U2474KCV's 3931 SMD footprint (approximately 9.3 mm × 7.9 mm) occupies significantly less board height than a comparable 0.47 µF 250 V through-hole film capacitor, which typically stands 15–20 mm tall with 22.5 mm lead spacing. The SMD format eliminates manual insertion and wave soldering, reducing assembly cost and enabling double-sided PCB placement in compact power electronics enclosures.
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