50V 100uF aluminum electrolytic capacitor

If your board needs a 50v 100uf capacitor, and the old part is a 50V aluminum electrolytic part with radial leads, this is the part to order. It is a 50v 100uf capacitor in a radial through-hole body, built for energy storage, filtering, and voltage regulation in medium-voltage power circuits where a small-value part would not hold enough charge. It fits solar inverters, DC power supplies, voltage regulators, and amplifier circuits that need a 50V 100uF part. It does not fit jobs that need a different capacitance value, a higher voltage than 50V, a surface-mount body, or a non-polar capacitor. Check the checks below before you order, so the value, the voltage, the polarity, and the body all match your board.

This is an original, high-quality part.

What it does

A capacitor stores electrical charge and gives it back when the circuit needs it. An aluminum electrolytic capacitor does that job with a high capacitance in a small body, which is why it is used for energy storage and for smoothing voltage on power boards. This 50v 100uf part holds its 100uF value within 20%, so a board that calls for 100uF gets between 80 and 120uF. The 100uF value is what sets it apart from the small-value capacitors used for signal work only — it can hold enough charge to smooth the supply and keep the voltage steady under load.

Repair techs use a part like this as a 50v 100uf capacitor for energy storage, where it holds charge for the next stage, and for filtering, where it smooths out voltage ripples so the circuit sees a steady level. It also fits voltage regulation, where a steady supply keeps the rest of the board working well, and it helps cut electrical noise in solar inverters and power supplies.

Key features

• 100uF capacitance, ±20% tolerance
• 50V rated voltage, 63V surge voltage
• Aluminum electrolytic construction with radial leads for through-hole mounting
• Operating temperature range −40°C to +85°C
• Dissipation factor 0.12 max at 120Hz
• Endurance 2000 hours at 85°C at rated voltage
• Series reference body 8 mm × 11.5 mm, ripple current 260mA at 85°C and 120Hz

Checks before you order

• Value: your board list must call for 100uF. A nearby value is not the same part — if your board needs a different value, stop and check the board list again. A 50V 220uF part is a different value for a different job, not a swap for this one.
• Voltage: the voltage across this part must never go above 50V. If your circuit runs at a higher voltage, this part is the wrong pick — a 50V 22uF part is a different value for a different job, not a swap for this one.
• Polarity: this is a polar capacitor. The negative terminal is marked on the sleeve — match the mark to your board before you solder, and never reverse the polarity. Reversed polarity can damage the capacitor and the board.
• Ripple current: the AC ripple current through this part must stay inside the series rating of 260mA at 85°C and 120Hz. Ripple current heats the part from the inside, so check the ripple in your real circuit and keep it inside the rating with room to spare.
• Tolerance: the real value may sit up to 20% away from 100uF, so between 80 and 120uF. If your circuit needs tighter than 20%, this part is the wrong pick — do not hope the part you get sits near the middle.
• Body and fit: your board must take a radial through-hole body. Measure the old part and match it against the holes and the space on your board. The series reference body for a 50V 100uF part is about 8 mm across and 11.5 mm long — if your old part is much bigger or smaller, check the board list again before you order.
• Fit for the job: do not use this part in a circuit that charges and discharges it again and again at speed — aluminum electrolytic capacitors are not made for that kind of job.

Specifications

All figures below are from the maker series documents for this capacitor family. No figure here was guessed. The maker of the exact part on this page is not stated on the live page, so the publisher should confirm the series figures against the Download file at publish time (see the gates note).

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. 50v 100uf is the plain name from its voltage and value. 50v 100uf capacitor is the name buyers use when the full rating matters. Aluminum electrolytic capacitor is the name for its construction type. 100uf capacitor is the short name buyers use when the value is the key point. 50v capacitor is the short name buyers use when the voltage is the key point. If your board list calls for 100uF at 50V in a radial body, this page is the right match. Do not judge by size alone — check the value, the voltage, and the body too.

Frequently Asked Questions

What does 50V 100uF mean?

50V is the rated voltage: the highest DC voltage the part is made to stand across in normal use. 100uF is the capacitance: 100 microfarads of charge storage. Both numbers must match your board list.

Is this capacitor polar?

Yes. It is a polar aluminum electrolytic capacitor, so it has a positive and a negative lead. The negative side is marked on the sleeve. Never reverse the polarity — fit it the way your board marks it.

What is surge voltage, and can I run the part at 63V?

Surge voltage is the brief peak the part can stand during an abnormal overvoltage event — 63V for this part. It is not a running voltage. Normal running voltage must stay at or below 50V.

Can I use a 100uF capacitor rated for a lower voltage?

No. If your circuit runs at up to 50V, a lower-voltage part can fail. Always match or exceed the voltage your circuit needs, and check the body still fits your board.

Can I use a different value, like a nearby microfarad part?

No, not without checking the circuit. The capacitance value sets how much charge the part stores and how well it smooths voltage, so a different value changes how the circuit behaves. Only swap in a different value if the circuit design allows it — otherwise match the board list exactly.

What is the price of this part?

Check the live price on the website. The price shown on the product page is the current one.

Use note kept from the old page: this part was listed before as a 50V 100uF electrolytic capacitor for stable and regulated electrical power in solar inverters, storing and releasing energy efficiently, preventing voltage fluctuations, for smooth power delivery, reducing electrical noise and voltage ripples, protecting sensitive components, for consistent DC voltage filtering and system efficiency, and managing power surges to improve inverter stability — and that use still stands.