Capacitor
470µF 25V Electrolytic Capacitor
470µF/25V polarized aluminum electrolytic — bulk energy storage on a power rail. Reversed polarity can vent the can.
Generic (every passive-components manufacturer)
Overview
A bulk/reservoir capacitor: large capacitance in a compact can, used to smooth out slower ripple and absorb load transients on a power rail — the DC-side equivalent of a small local battery that a regulator or supply can draw from faster than its own upstream source can respond, filling in the gap a 100nF decoupling cap is too small (and too fast-acting) to cover. Common jobs: across a linear or switching regulator's input/output, at the DC side of a rectified/unfiltered supply, or anywhere a sudden current draw (a motor starting, a WiFi radio's TX burst) would otherwise sag the rail. The critical thing that separates it from a ceramic cap: aluminum electrolytics are polarized. The can has a marked negative lead (usually a stripe with '-' symbols down the side, and often a shorter lead on a fresh part), and applying reverse voltage — even briefly — breaks down the internal oxide layer that IS the dielectric. That failure isn't graceful: the electrolyte can boil and vent through the can's pressure-relief score, sometimes forcefully enough to be startling (occasionally described as capacitors 'popping'). Always check the marking before soldering, and never assume 'it's just a capacitor, orientation doesn't matter' — that's true for the ceramic in this catalogue, not for this one.
Wiring tip: polarized — stripe marks the NEGATIVE lead, reversing it can vent the can
Pins & wiring
470µF 25V Electrolytic Capacitor
Linear package
Physical pin order shown left to right.
All pins
Hover · click to selectSelected pin
+
- Direction
- Passive
Positive lead — the LONGER of the two on a fresh, unmodified part. Always confirm against the can's printed stripe rather than lead length alone once a part has been handled or re-trimmed.
Full pin table
| Pin | Name | Role | Direction | Note |
|---|---|---|---|---|
| + | Other | Passive | Positive lead — the LONGER of the two on a fresh, unmodified part. Always confirm against the can's printed stripe rather than lead length alone once a part has been handled or re-trimmed. | |
| - | silk: stripe with – marks | Ground | Passive | Negative lead, marked with a printed stripe of minus signs down the can. This is the orientation cue that matters — get it backwards and the part can vent. |
Wiring examples
Bulk filtering on a regulator's output rail
Sits across the output of a linear or switching regulator, smoothing load transients that the regulator's own feedback loop is too slow to react to instantly.
| 470µF 25V Electrolytic Capacitor pin | Connects to | Note |
|---|---|---|
| + | LM2596 Buck Converter Module · vout_plus | — |
| - | LM2596 Buck Converter Module · vout_minus | — |
- Double-check polarity against the can's stripe before soldering — this is the single most common way this part fails, and a reversed electrolytic can vent when powered up.
- Confirm the voltage rating leaves real headroom above the rail it's connected to. 25V on a 5V or 12V rail is fine; using a 25V-rated part on a rail anywhere near 25V is not — electrolytics lose life expectancy (and safety margin) fast as you approach the rated voltage.
- This is a bulk/reservoir cap, not a substitute for local 100nF decoupling at each IC — the two serve different timescales and are normally used together.
Specifications
Electrical
- Capacitance
- 470 µFsrc
- Voltage Rating
- 25 Vsrc
- Tolerance
- Varies by vendor
Performance
- ESR
- Varies by vendor
- Ripple Current
- Varies by vendor
Physical
- Package
- Varies by vendor
- Dielectric
- electrolytic
- Mounting
- tht
Footprint
No independently verified physical footprint is on file for this part yet.
Alternatives
No alternatives are on file yet for this part.
Documents
No documents or CAD assets are on file for this part yet.
Frequently asked questions
What voltage does the 470µF 25V Electrolytic Capacitor run at?
The 470µF 25V Electrolytic Capacitor runs at 25V, per the spec sheet below. Always double-check against the specific board you have — some breakouts add an onboard regulator that changes the usable input range.
How many pins does the 470µF 25V Electrolytic Capacitor have?
The 470µF 25V Electrolytic Capacitor has 2 pins. See the full pinout table in Pins & wiring for each pin's role.
Can I simulate the 470µF 25V Electrolytic Capacitor before ordering hardware?
Not yet — the 470µF 25V Electrolytic Capacitor does not have a live simulation model in Banana Board today, so validate the wiring here and test on real hardware.
Related references
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