ECA-1HM221B Panasonic Capacitor Polarised (Capacitor, Polarized Radial Diameter) In Stock
The Panasonic ECA-1HM221B is a 220 µF, 50 V radial aluminum electrolytic capacitor from the M Series with a 2000-hour rated lifetime in a 10 mm x 12.5 mm through-hole package. It provides reliable bulk energy storage and filtering for AC-DC power supplies. Available in stock worldwide with competitive pricing for prototype and production runs.
- Manufacturer
- Panasonic
- Package
- Capacitor, Polarized Radial Diameter
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- ECA-1HM221B Datasheet PDF
- Category
- Capacitor Polarised
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 220 µF capacitance at 50 V rating in a compact 10 mm diameter x 12.5 mm height radial through-hole package for space-efficient power supply filtering
- 2000-hour rated operational life at maximum temperature, ensuring long-term reliability in consumer and industrial power supply designs
- Panasonic M Series aluminum electrolytic construction with low ESR characteristics enabling effective 50/60 Hz and high-frequency ripple current suppression
Applications
The ECA-1HM221B is a standard bulk filtering capacitor for AC-DC linear and switching power supplies operating at output voltages up to 35 V with a 50 V rated component. Its 220 µF value provides substantial charge reservoir for smoothing full-wave rectifier outputs in 30 W to 60 W power adapters and desktop supply units. The 10 mm x 12.5 mm radial package fits standard PCB footprints and is compatible with automatic radial insertion equipment in volume production.
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 voltage and capacitance does the ECA-1HM221B offer for power supply bulk filtering?
The ECA-1HM221B provides 220 µF of capacitance rated at 50 V, suitable for bulk filtering on 24 V to 35 V DC output rails in linear and switching power supplies. The 220 µF charge reservoir reduces peak-to-peak output voltage ripple by approximately 50% compared to a 100 µF capacitor at equivalent load current, improving load regulation in regulated 24 V or 28 V industrial supply designs.
How does the 2000-hour lifetime rating of the ECA-1HM221B affect product design reliability calculations?
The 2000-hour lifetime at maximum rated temperature is the baseline for calculating the expected service life of the ECA-1HM221B using the 10°C-per-doubling Arrhenius rule. Operating the capacitor 10°C below its rated maximum temperature extends expected life to approximately 4000 hours. At 25°C below maximum temperature, projected life reaches 16000 hours, supporting multi-year service intervals in always-on industrial power supply designs.
In which power supply topologies does the ECA-1HM221B 10 mm x 12.5 mm radial package provide the best fit?
The 10 mm diameter, 12.5 mm height radial package of the ECA-1HM221B fits the standard capacitor footprint in AC-DC flyback converters, linear post-regulators, and bridge rectifier output stages rated from 20 W to 60 W. Its body height of 12.5 mm is within the common 15 mm PCB clearance zone used in commercial power adapters and open-frame supply designs, allowing use without mechanical interference in most standard enclosures.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About Panasonic
Panasonic is a leading electronic component manufacturer. FindMyChip sources Panasonic ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”