ECW-U2473JC9 Panasonic Capacitor (Other) In Stock
Panasonic ECW-U2473JC9 is a 47 nF, 630 V stacked metallized PPS (polyphenylene sulfide) film capacitor with a mold-less construction offering excellent high-temperature stability and low dissipation factor for precision filtering and resonant circuit applications. Designed for demanding power electronics and audio circuits where tight capacitance tolerance and thermal stability are required. Available from stock with worldwide shipping.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ECW-U2473JC9 Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 47 nF capacitance at 630 V DC rating for high-voltage filtering and resonant circuit applications
- Stacked metallized PPS film dielectric provides superior temperature stability and low dissipation factor
- Mold-less construction reduces package stress and improves long-term capacitance stability
- PPS dielectric maintains capacitance within tight tolerance across -55°C to +150°C operating range
- Self-healing metallized electrode construction for improved reliability under overvoltage conditions
Applications
The ECW-U2473JC9 is used in precision resonant circuits, EMI filter networks, and high-voltage coupling stages in power supply units, inverters, and professional audio equipment where stable 47 nF capacitance at up to 630 V DC is required. Its PPS film dielectric makes it particularly suitable for applications demanding stable capacitance over wide temperature swings, such as switching power supply snubber circuits and high-precision tuned filters operating up to 150°C. The mold-less construction also reduces mechanical stress, making it a preferred choice for long-life industrial and instrumentation designs.
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 capacitance value and voltage rating of the ECW-U2473JC9, and what dielectric does it use?
The ECW-U2473JC9 has a capacitance of 47 nF rated at 630 V DC, using a stacked metallized PPS (polyphenylene sulfide) film as the dielectric. PPS film provides significantly better capacitance stability with temperature compared to polyester (PET) film, maintaining tight tolerance across the -55°C to +150°C operating range, which is critical in resonant and precision filter circuits.
Why is PPS film chosen for ECW-U2473JC9 in high-temperature power electronics over standard polyester film capacitors?
PPS film has a much lower temperature coefficient of capacitance than polyester (PET) film, typically remaining stable within ±1% from -55°C to +150°C compared to PET's ±5% or more over the same range. For power electronics snubber circuits or resonant tank capacitors in switching converters operating at junction temperatures up to 125°C, this stability prevents resonant frequency drift and ensures consistent EMI suppression performance over the product lifetime.
Can ECW-U2473JC9 be used as a snubber capacitor in a 400 V DC bus inverter switching at 50 kHz?
Yes, ECW-U2473JC9 with its 630 V DC rating provides adequate voltage margin on a 400 V DC bus for snubber duty. Its 47 nF capacitance combined with a snubber resistor can be tuned to dampen MOSFET or IGBT switching voltage spikes at 50 kHz switching frequency. The PPS film's low dissipation factor, typically below 0.1% at 1 kHz, minimizes self-heating in the snubber, extending capacitor operating life even at elevated PCB temperatures.
What does mold-less construction mean for ECW-U2473JC9, and how does it affect long-term reliability?
Mold-less construction means the capacitor winding is not encapsulated in a hard epoxy mold, eliminating the mechanical stress that hard encapsulants can impose on the film winding during thermal cycling between -55°C and +150°C. This reduces the risk of internal delamination or capacitance drift over thousands of thermal cycles, improving the capacitor's long-term reliability in instrumentation and industrial equipment with 10 to 20 year service life requirements.
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