ECW-U1C394JC9 Panasonic Capacitor (Capacitor Chip Non-polarised) In Stock
The ECW-U1C394JC9 is a 0.39 µF, 16V stacked polyethylene naphthalate (PEN) film capacitor from Panasonic with ±5% tolerance, rated to 105°C in a 6 x 4.1 x 2.4 mm chip body. It offers stable capacitance and low losses for signal filtering and bypass applications. Available in tape-and-reel packaging for automated SMT assembly in consumer and industrial electronics.
- Manufacturer
- Panasonic
- Package
- Capacitor Chip Non-polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ECW-U1C394JC9 Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.39 µF capacitance with ±5% tolerance and 16V rating in a compact 6 x 4.1 x 2.4 mm stacked PEN film chip body
- 105°C maximum operating temperature ensuring stable performance in thermally demanding automotive and industrial environments
- Stacked film construction providing low ESR and ESL for efficient AC signal filtering and bypass applications
- Tape-and-reel (T/R) packaging enabling high-volume automated SMT pick-and-place assembly
- Non-polarized PEN dielectric delivering long-term capacitance stability without DC bias sensitivity
Applications
The ECW-U1C394JC9 is used as a bypass and decoupling capacitor on 16V signal and logic rails in consumer electronics, audio equipment, and industrial control boards where stable capacitance up to 105°C is required. Its low-loss PEN film dielectric makes it suitable for EMI filter networks and snubber circuits in switching power supplies operating at frequencies from DC up to several hundred kilohertz. The tape-and-reel format supports high-speed automated assembly in camera modules, motor driver boards, and handheld instrument production lines.
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
How does the 105°C temperature rating of the ECW-U1C394JC9 benefit designs near heat-generating power stages?
Rated to 105°C, the ECW-U1C394JC9 retains its 0.39 µF capacitance within ±5% tolerance even when mounted adjacent to power MOSFETs or inductors that raise local board temperatures above 85°C, unlike standard 85°C-rated film capacitors that may drift out of specification in those conditions.
For an EMI snubber circuit across a 16V switching node, how does the PEN film dielectric of the ECW-U1C394JC9 compare to an equivalent ceramic capacitor?
PEN film capacitors like the ECW-U1C394JC9 maintain their 0.39 µF value without DC bias derating, whereas class-2 ceramic capacitors can lose 50% or more of rated capacitance at 16V, making the film type more reliable for snubber and filter circuits where consistent capacitance is critical.
What physical dimensions does the ECW-U1C394JC9 present on a PCB and how does that affect layout near SMT inductors?
At 6 mm x 4.1 mm x 2.4 mm, the ECW-U1C394JC9 occupies a moderate footprint that requires a courtyard clearance of at least 0.5 mm from adjacent components, but its 2.4 mm height stays within standard SMT profile limits, allowing placement beside common 2 mm-height shielded SMD inductors without height conflicts.
How many ECW-U1C394JC9 units are typically supplied per tape-and-reel and what minimum order quantities should procurement planners expect?
Panasonic film capacitors in the ECW-U series are typically packaged in reels of 2,000 or 4,000 units per reel depending on body size; for the 6 x 4.1 x 2.4 mm format, distributors commonly supply 2,000-piece reels, so procurement teams should plan orders in multiples of 2,000 to avoid partial-reel surcharges.
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