EEE-FK1H391AQ Panasonic Capacitor Polarised (Other) In Stock
The EEE-FK1H391AQ is a Panasonic surface-mount aluminum electrolytic capacitor rated at 390 µF and 50 V, offering high capacitance in a compact SMD form factor for bulk energy storage and decoupling in power supply circuits.
- Manufacturer
- Panasonic
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- EEE-FK1H391AQ Datasheet PDF
- Category
- Capacitor Polarised
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 390 µF capacitance at 50 V rating for high-density bulk energy storage in compact SMD designs
- Aluminum electrolytic construction with SMD termination for reflow-compatible automated PCB assembly
- Panasonic FK series design optimized for low ESR and long operational life in power conversion applications
Applications
The EEE-FK1H391AQ is commonly used in switching power supplies, DC-DC converters, and motor drive circuits where 390 µF of bulk capacitance at 50 V is required in a surface-mount format. It serves as an output filter capacitor to smooth voltage ripple and as a hold-up capacitor to maintain rail stability during load transients. Its SMD package suits high-volume automated assembly in industrial and consumer electronics products.
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 are the capacitance and voltage ratings of the EEE-FK1H391AQ, and what applications do they target?
The EEE-FK1H391AQ is rated at 390 µF capacitance and 50 V, making it well-suited for output filtering in 24 V to 48 V switching power supplies and DC-DC converters. This combination provides substantial charge storage to handle load transients and reduce output voltage ripple in medium-power electronic systems.
How does the SMD package of the EEE-FK1H391AQ benefit PCB assembly compared to through-hole electrolytic capacitors?
The EEE-FK1H391AQ uses a surface-mount (SMD) package compatible with reflow soldering, eliminating the need for through-hole drilling and wave soldering. This reduces PCB fabrication cost and assembly time in high-volume production, while also allowing tighter component placement density compared to traditional through-hole aluminum electrolytic capacitors of similar 390 µF / 50 V rating.
When should a designer choose the EEE-FK1H391AQ over a multilayer ceramic capacitor (MLCC) for bulk decoupling?
The EEE-FK1H391AQ is preferred over MLCCs when the design requires 390 µF at 50 V in a single package, since MLCCs of equivalent capacitance at 50 V would require many parallel devices and significantly more board area. Aluminum electrolytic capacitors also tolerate DC bias voltage better than high-capacitance MLCCs, which can lose over 50% of capacitance at rated voltage due to DC bias derating.
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