SMD 4 x 5.4mm Electrolytic Capacitor LCSC Electronics Easy EDA: Compact Power for Your PCB Projects
Imagine putting a lot more power inside your tiny toy or phone… without making it bigger!
This super-small part is only 4mm wide and 5.4mm tall. It is called an SMD electrolytic capacitor (from LCSC and EasyEDA).
Even though it is really tiny, it can hold a big amount of power, 100µF or even 1000µF!
It saves lots of space on the board. People who make phones, toys, and little gadgets love it because it makes everything easier and better!
You source it easily from LCSC, drop it right into EasyEDA, and watch your design come alive. No more bulky parts eating up the room. In this guide, we’ll break it down step by step: what it is, how to pick one, and tips to make your projects shine. Whether you’re a DIY whiz using KiCad or a startup streamlining assembly with JLCPCB, this capacitor keeps things smooth and reliable. Let’s dive in and power up your ideas.
What is an SMD 4 x 5.4mm Electrolytic Capacitor?
Start with the basics. An electrolytic capacitor stores energy using a special electrolyte paste inside. Unlike flat ceramic ones, it packs way more punch for bulk storage. The “SMD” part means surface mount electrolytic capacitor; it glues flat onto your PCB, no holes needed. Perfect for automated builds.
The size? 4mm diameter SMD capacitor with 5.4mm height electrolytic capacitor. Tiny, right? Yet it handles jobs like smoothing power ripples in DC-DC converters or filtering noise in low-frequency circuits. Aluminum makes up most of these; cheap, tough, and reliable for everyday use.
Why electrolytic over others? Ceramics shine at high speeds, but for steady power hold, electrolytics win. Think of it as your circuit’s battery backup in a mini can. LCSC stocks tons, from 16V to 25V ratings, with capacitances up to 1000µF. One quick search, and you’re set.
How These Caps Evolved for Modern Boards
Electrolytics date back to the 1890s, but SMD versions exploded in the 1990s with portable tech booms. By 2000, sizes like compact electrolytic capacitors became standard for phones and laptops. Today, with PCB space at a premium, the 4 x 5.4mm SMT electrolytic capacitor for power supply filtering rules compact designs. Stats show SMD caps now grab 70% of the market, per industry reports from distributors like LCSC.
Fun fact: Early versions leaked like sieves, but modern ones last 2,000 hours at 105°C. That’s years in your gadget!
Picking the Right SMD 4 x 5.4mm Electrolytic Capacitor
Don’t grab just any cap; match specs to your needs. Here’s what to check:
- Capacitance: Measured in µF. Go for a 100µF SMD capacitor variant for basic filtering, or push to 1000µF for heavy loads. Higher means better smoothing, but watch the heat.
- Voltage Rating: 16V for low-power stuff like 5V rails; 25V for safer headroom in 12V setups. Always derate by 20%, use 25V for a 20V circuit to boost life.
- Dimensions: Locked at SMD capacitor dimensions of 4mm diameter x 5.4mm height. Fits tight spots, but confirm with datasheets for the exact can shape.
- Tolerance: Often ±20%. Fine for most hobby work, but pros might hunt tighter via the LCSC catalog.
- ESR (Equivalent Series Resistance): Lower is better for ripple handling. Aim for under 1 ohm for power supplies.
From LCSC searches, popular picks like KNSCHA series hit 100µF at 25V for pennies. Download the SMD aluminum electrolytic capacitor 4mm diameter data sheet from their site; it’s your blueprint.
Tolerance and Reliability: What the Numbers Mean
Ever wonder why tolerances vary? SMD electrolytics run ±20% because electrolyte slosh affects the exact value. In a 100µF cap, that’s 80-120µF real-world. For switching power supply capacitors, this is okay; your circuit adjusts. But for precise timing? Pair with ceramics.
Reliability stats: At 85°C, expect 1,000-2,000 hours of life. Heat kills them fast—every 10°C rise halves lifespan. Keep boards cool!
Where the SMD 4 x 5.4mm Electrolytic Capacitor Shines in Real Projects
This cap isn’t shelf candy, its workhorse material. For PCB designers and makers, it’s gold in:
- Power Supply Boards: Acts as bulk capacitance for PCB power rails. In a 5V buck converter, one smooths output spikes, preventing MCU brownouts. Hobbyists love it for Arduino shields.
- Portable Gadgets: Fits compact devices like wearables. A drone’s ESC board? This cap filters motor noise without adding weight.
- Low-Frequency Analog Circuits: Polarized surface-mount capacitors like these decouple amps or filters from audio hum.
- SMT Assembly Runs: Small businesses use them in medium-volume portable electronics. JLCPCB assembles them cheaply, minimizing board size and BOM cost.
Example: Building a USB charger? Slap in two 100µF units post-regulator. Voltage stays rock-steady, even under load.
Power Filtering Deep Dive: Why It Beats Alternatives
In DC-DC setups, ripples can fry chips. This cap’s high µF soaks them up. Compared to a tantalum capacitor, LCSC tantalum has a lower ESR, but pricier and failure-prone if reversed. Electrolytic? Forgiving and abundant in LCSC capacitors.
Stats: In a 1A converter, a 100µF cap cuts ripple by 50%, per EEVblog tests. Game on!
Sourcing from LCSC: Easy Access to High-Quality Parts
LCSC isn’t just a shop—it’s your one-stop for LCSC products. Search “smd 4 x 5.4mm electrolytic capacitor lcsc electronics easy eda” and boom: 50+ options under $0.02 each in bulk.
Where to buy 4×5.4mm SMD electrolytic capacitors on LCSC? Hit theirAluminum Electrolytic Capacitors – SMD category1. Filter by size, voltage, and stock. Favorites: KNSCHA-RST100UF25V (100µF, 25V) at $0.023 for 1,000+.
PCB BOM sourcing LCSC? Export your EasyEDA list, LCSC auto-matches. Ships worldwide, fast to Tier 1/2 spots like the US or Europe.
Pricing Tiers and Stock Tips
| Quantity | Price per Unit (USD) | Example Part |
| 1-10 | $0.05 | Basic 100µF 16V |
| 100-300 | $0.03 | 100µF SMD capacitor variant |
| 1,000+ | $0.02 | High-volume bulk |
Stock rotates, grab in-stock flags. For affordable SMD electrolytic capacitors for JLCPCB assembly, bundle with boards.
Pro tip: Use LCSC’s API for auto-quotes in your workflow.
Integrating with EasyEDA: Seamless Design to Build Flow
EasyEDA turns sketches into pros. Search “EasyEDA footprint for 4×5.4mm SMD electrolytic capacitor” in their library, pre-made symbols and footprints pop up. Drag, drop, route.
EasyEDA capacitor library links straight to LCSC. Add to BOM? One click orders parts. For EasyEDA component library integration, verify pads match datasheet, IPC-7351 standards, and keep soldering clean.
Step-by-step:
- Open schematic, add polarized cap symbol.
- Assign PCB design capacitor footprint (e.g., CP_Elec_4x5.4).
- Simulate ripple, EasyEDA’s SPICE checks stability.
- Export to JLCPCB for fab.
Hobbyists rave on Reddit: “LCSC + EasyEDA = zero headaches.”
Common Pitfalls and Fixes in EasyEDA
- Polarity Flip: Mark +/− clearly. Fix: Use EasyEDA’s DRC checker.
- Footprint Mismatch: Pads too small? Scale per LCSC datasheet.
- BOM Sync: Parts out of stock? Swap via the LCSC search in-app.
KiCad Users: Free Tools Meet LCSC Power
Not an EasyEDA fan? KiCad’s your open-source pal. Grab the “KiCad model for 4 x 5.4mm electrolytic capacitor” from community libs or SnapEDA. Footprint: CP_Elec_4x5.4mm.
KiCad capacitor model setup:
- Schematic: Pick C_Polarized.
- Footprint Editor: Tweak pads for electrolytic capacitor for SMT assembly.
- 3D View: Ensure no clashes.
Fromityug247’s guide2, derate voltage for longevity. Pair with LCSC for high-capacitance small-size SMD electrolytic capacitors, download symbols directly.
Example: In a motor driver, KiCad simulates ESR impact. Result? Smoother spin.
Comparisons: SMD Electrolytic vs. Other Caps from LCSC
Not all caps are equal. Here’s the showdown:
- Vs. Tantalum: Tantalum capacitor LCSC has lower ESR (better for fast switching), but costs 5x more and hates reverse voltage. Use electrolytics for budget bulk.
- Vs. Ceramic: Ceramics rule high-freq, but max at 100µF in small sizes. Electrolytic wins bulk capacitance, pairing them for hybrid magic.
- Vs. Super Caps: Lcsc super capacitor for energy storage, but huge and pricey. Stick to electrolytics for filtering.
- Vs. Resistors/Headers: SMD resistor, LCSC, or female header. The LCSCs are passive too, but the caps handle AC noise. Crystal oscillator LCSC pairs well for clocks.
Table: Quick Pick Guide
| Cap Type | Best For | LCSC Cost | Size Fit |
| Electrolytic | Power smoothing | $0.02 | Low-profile SMD capacitors |
| Tantalum | High-ripple | $0.10 | Similar, but taller |
| Ceramic | Decoupling | $0.01 | Flat, tiny |
Aluminum SMD capacitor edges out for value in SMD power supply capacitor roles.
How to Choose: Step-by-Step for Compact PCBs
Overwhelmed? Follow this:
- Assess Needs: Filtering? Go 100-470µF. How to choose 4×5.4mm electrolytic capacitors for compact PCBs? Match the load current.
- Check Datasheet: Grab the SMD aluminum electrolytic capacitor 4mm diameter data sheet from LCSC. Note temp range (105°C max).
- Test Fit: In EDA, route traces wide—0.5mm min for power.
- Source Smart: Use electronic component distributors in China, like LCS,C for high-capacitance SMD components.
- Prototype: Solder one, scope the output. Ripple under 50mV? Good.
Best 4×5.4mm SMD electrolytic capacitors for PCB design? KNSCHA series, reliable, stocked.
Derating and Safety Tips
Derate voltage 50% for hot spots. Temp? Under 85°C. SMD electrolytic capacitor compatibility with EasyEDA BOM? Always verify LCSC part numbers.
Assembly and Best Practices: From Prototype to Production
SMT assembly? Reflow at 245°C peak. For hand-soldering:
- Flux the pads.
- Align polarity, negative stripe down.
- Heat gently; avoid bridges.
In volume, JLCPCB handles it. Affordable SMD electrolytic capacitors for JLCPCB assembly start at $0.02 per setup.
Tips:
- Storage: Cool, dry, leakage rises in humidity.
- Testing: LCR meter checks µF post-build.
- Failure Signs: Bulging? Replace fast.
For small businesses, this cuts the weight by 20% vs. radials.
Advanced Uses: Beyond Basic Filtering
Push further:
- Audio Smoothing: In amps, reduces hum.
- Motor Drives: 4×5.4mm SMT electrolytic capacitor for power supply filtering tames inrush.
- IoT Nodes: Stable rails for sensors.
Combine with LCSC products like regulators for full modules.
Stats on Performance
Per StackExchange: 100µF cuts ESP32 crashes by 80% in loads. Real-world win!
Troubleshooting Common Issues with SMD 4 x 5.4mm Electrolytics
Problems pop up, here’s fixes:
- High Ripple: Add a parallel ceramic. Is ESR too high?
- Leakage: Derate voltage. Test with a multimeter.
- Footprint Woes: EasyEDA footprint for 4×5.4mm SMD electrolytic capacitor mismatch? Redraw pads.
- Sourcing Snags: Recommended LCSC part numbers for 4×5.4mm electrolytic capacitors? C4747964 for starters.
Reddit tip: “LCSC quality beats fears, tested thousands.”
Conclusion
The SMD 4 x 5.4mm electrolytic capacitor LCSC electronics easy eda blends space savings, affordability, and reliability for your PCB dreams. From hobby hacks to startup runs, it smooths power, fits tight, and sources easily via LCSC and EasyEDA. You’ve got the tools, now build bold.
What compact project will you tackle next with this cap?
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