ECW-U4333V17 Panasonic Capacitor (Capacitor Chip Non-polarised) In Stock
Panasonic ECW-U4333V17 is a 0.033 uF, 400 VDC film capacitor with 5% tolerance in a 2420 chip package. It offers stable capacitance and low loss characteristics suitable for high-voltage filtering, coupling, and decoupling applications. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Panasonic
- Package
- Capacitor Chip Non-polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ECW-U4333V17 Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.033 uF capacitance at 400 VDC rating provides high-voltage film decoupling and coupling performance in a compact 2420 chip footprint
- 5% tolerance ensures predictable impedance behavior across AC filtering, snubber, and timing circuit designs without manual capacitor selection
- Non-polarized film dielectric delivers stable capacitance over temperature and frequency, outperforming electrolytic types in high-AC-stress power electronics applications
Applications
The ECW-U4333V17 is well suited for AC line filtering, power factor correction snubber networks, and resonant tank circuits in switching power supplies operating up to 400 VDC. Its stable 0.033 uF film dielectric and 5% tolerance make it appropriate for coupling and bypass duties in industrial inverters, motor drives, and audio amplifier output stages where electrolytic capacitors cannot meet the AC ripple current requirements.
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 is the voltage rating and capacitance of the ECW-U4333V17, and how do they affect its use in power supplies?
The ECW-U4333V17 is rated at 400 VDC with a capacitance of 0.033 uF and 5% tolerance. This 400 VDC rating allows direct use on rectified 230 VAC line voltages in switching power supply snubber and filter circuits, where a minimum 350 VDC component rating is required to handle transient overvoltage spikes above the nominal 325 V peak.
Why choose a film capacitor like the ECW-U4333V17 over a ceramic capacitor for high-voltage AC filtering at 400 VDC?
Film capacitors such as the ECW-U4333V17 maintain stable 0.033 uF capacitance across the full 400 VDC bias range with under 1% capacitance drift, whereas ceramic X7R capacitors can lose 50% to 80% of rated capacitance at high DC bias. This stability is critical in snubber and resonant filter circuits where capacitance deviation shifts the resonant frequency and degrades power conversion efficiency.
For which high-frequency applications is the 2420 chip package of the ECW-U4333V17 particularly advantageous?
The 2420 chip form factor of the ECW-U4333V17 provides shorter lead inductance than axial or radial through-hole film capacitors, typically keeping equivalent series inductance below 3 nH. This low inductance is important in switching power supply clamp circuits operating above 100 kHz, where lead inductance in through-hole equivalents would degrade the voltage clamping effectiveness on MOSFET drain spikes.
How does the 5% tolerance of the ECW-U4333V17 compare to tighter tolerance film capacitors for resonant circuit designs?
In resonant circuits tuned to a specific frequency, the 5% tolerance of the ECW-U4333V17 introduces up to a 2.5% shift in resonant frequency relative to nominal, which is acceptable for broadband filtering but may require hand-selection for narrow-band resonators targeting accuracy within 1%. For most snubber and AC coupling applications at 400 VDC, the 5% grade balances cost and performance across the 0.033 uF value.
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