How do I start selecting an AiSHi snap-in capacitor?

Fix the voltage class from your rail with margin, size the capacitance for the ripple and hold-up, then check the ripple current rating and the case size. Finally confirm the terminal layout fits your PCB footprint. Those decisions narrow the range quickly.

What terminal layouts are available?

Snap-in capacitors use two or three terminals on a standardized spacing, so a part can drop into a common footprint. Check the terminal count and the hole spacing against your board before you commit. Our FAE team can confirm the layout.

How do I choose the temperature grade?

Choose a 105 °C long-life series such as the AiSHi LM range for a warm enclosure and a long service life. The endurance at the rated temperature and ripple is the headline number, and a cooler layout extends the life further. Match the grade to the hottest ambient in the enclosure.

Can BeiLuo help finalize my capacitor choice?

Yes. Send your rail voltage, capacitance, ripple and board space and we will propose a shortlist with ripple, life and stock status, then support the design-in. Getting the capacitor right saves project time.

How do I start selecting a screw-terminal capacitor?

Fix the voltage class from your DC bus with margin, size the capacitance for the ripple and hold-up, then check the ripple current rating and the can size. Finally confirm the terminal and mounting. Those decisions narrow the range quickly.

Why choose a screw or lug terminal capacitor?

A screw or lug terminal connects to a busbar or heavy cable, so the capacitor handles the high current and high ripple of a power stage far better than a leaded PCB part, and its large can provides the thermal mass to dissipate the ripple heating. That suits DC-link and bulk-storage designs.

How do I size the capacitance?

Size the capacitance for the acceptable bus ripple and the required hold-up, then check that the total ripple current is within the sum of the capacitor ratings. A larger bank lowers the ripple and extends the hold-up, but it costs more and takes space. Our FAE team can run the sizing.

How do I estimate the lifetime?

Aluminum electrolytic lifetime roughly doubles for every 10 °C reduction in core temperature, so estimate the core temperature from the case temperature and the ripple heating, then use the datasheet endurance and the rule. Our FAE team can run the lifetime estimate for you.

How do I estimate capacitor lifetime?

Estimate the core temperature from the case temperature and the ripple heating, then use the datasheet endurance and the rule that life roughly doubles for every 10 °C reduction in core temperature. Keep the ripple within the rating at the operating temperature. Our FAE team can run the lifetime estimate.

What is ripple current and why does it matter?

Ripple current is the AC current the capacitor carries in addition to the DC voltage, produced by the switching stage. It heats the capacitor through its equivalent series resistance, so it sets the core temperature and therefore the life. Keep it within the rating and derate at high temperature. The bank shares the ripple across the capacitors.

How do I keep the capacitors cool?

Space the capacitors for airflow, keep them away from the transformer and the switching devices, and use a larger can where more thermal mass is needed. A cooler capacitor ages far more slowly, so the layout is a direct lever on the life. Our FAE team can review the thermal layout.

Does paralleling change the ripple rating?

Paralleling shares the ripple, so the bank rating is the sum of the individual ratings, provided the current shares evenly. Keep the busbar impedance balanced so each capacitor carries its share, and verify the ripple on each part under load. Our FAE team can review the bank design.

My capacitor has lost capacitance. Why?

Capacitance loss is the normal aging of an aluminum electrolytic, and it accelerates with core temperature and ripple. If the loss is faster than expected, check the ripple margin and the case temperature, and verify the capacitor is not operating above its voltage or reverse-biased. Our FAE team can review the operating conditions.

My capacitor is running hot. What should I check?

Check the ripple current against the rating at the case temperature, the local ambient near the capacitor, and the airflow. A hot capacitor is usually carrying too much ripple, sitting near a heat source, or starved of airflow. Recheck the derating and the layout. Measure the case temperature at worst-case load.

The capacitor vented or failed. What caused it?

Venting usually follows an over-voltage, a reverse voltage, an over-temperature or excessive ripple that dried the electrolyte. Check the applied voltage against the rating with margin, confirm the polarity, and verify the ripple and temperature are within limits. A single failure often points to a bank imbalance.

The lug or snap-in terminal is loose. What should I check?

For a lug or screw terminal, confirm the tightening torque and the busbar flatness; for a snap-in terminal, confirm the hole spacing and the solder joint. A loose connection raises the contact resistance and heats the terminal, which can damage the capacitor. Our FAE team can advise on the connection.

What is the standout feature of the AiSHi range?

The standout feature is the breadth of the large-capacitance range across snap-in and lug (screw) terminal options, with 105 °C long-life series and high ripple capability, at a competitive cost for Chinese-manufactured capacitors. One supplier covers both the board-mounted and the busbar-connected DC-link needs. The main design care points are ripple and temperature.

Snap-in or lug terminal in practice?

In practice a snap-in capacitor is used for the lower-current rails and dense boards, where it mounts directly on the PCB, while a lug terminal capacitor is used for the high-current DC link, where it connects to a busbar. Most designs use both. Our FAE team can help partition the capacitance.

How does the long-life series help?

A long-life series such as the AiSHi LM range, with a 3000-hour endurance at 105 °C, extends the service interval in equipment that runs continuously and is hard to service, such as solar inverters and industrial converters. Keeping the case cool extends the life further. Match the series to the required life.

Can I get samples to evaluate?

Yes. We provide samples of the AiSHi capacitors for your own ripple, temperature and lifetime testing, with documentation included and FAE support during bring-up. Request a sample and we will confirm stock and lead time.

Technical Support | AiSHi Expertise | BeiLuo

Guides, application notes, troubleshooting and reviews from BeiLuo's FAE team covering AiSHi screw-terminal and snap-in aluminum electrolytic capacitors.

Guides 2 Application Notes 1 Troubleshooting 1 Reviews 1

How to Select an AiSHi Snap-In Capacitor

2026-07-26 - Guides - By Zhang Wei Lin

Compare AiSHi snap-in aluminum electrolytic capacitors by voltage, capacitance, ripple, case size and lifetime for compact PCB power and converter designs.

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How to Select an AiSHi Screw Terminal Capacitor

2026-07-21 - Guides - By Li Hao Chen

Compare AiSHi screw and lug terminal aluminum electrolytic capacitors by voltage, capacitance, ripple and lifetime for high-current DC-link designs and banks.

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AiSHi Capacitor Lifetime and Ripple Notes

2026-07-16 - Application Notes - By Wang Yu Bo

Ripple current, temperature and lifetime guidance for designing reliable AiSHi aluminum electrolytic capacitor banks in power converters and inverters.

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Troubleshooting AiSHi Capacitors: A Fault Guide

2026-07-09 - Troubleshooting - By Wang Yu Bo

A systematic method for diagnosing capacitance loss, overheating, venting and mounting problems in AiSHi aluminum electrolytic capacitors and systems.

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AiSHi Aluminum Capacitors: A Practical Review

2026-06-30 - Reviews - By Zhang Wei Lin

A hands-on review of AiSHi screw-terminal and snap-in aluminum electrolytic capacitors, covering ripple, lifetime, mounting and layout practice for converters.

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Meet Our FAE Team

Zhang Wei Lin

Senior FAE Engineer, Capacitors

Snap-InRippleInverters

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Li Hao Chen

FAE Engineer, Large Capacitors

Screw TerminalDC-LinkLayout

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Wang Yu Bo

FAE Engineer, Applications

LifetimeThermalReliability

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