Why Review the AiSHi Range

AiSHi, the capacitor brand of the Aihua Group, has manufactured aluminum electrolytic capacitors since 1985 and is one of the largest producers in China, making around 19 billion capacitors a year. Its large-capacitance line spans snap-in and lug (screw) terminal parts for power supplies, converters and new-energy equipment. The datasheets give the numbers, but the datasheet only tells part of the story. This review examines the range from the perspective of an FAE who supports customers through selection and lifetime sign-off, focusing on ripple and lifetime, mounting, thermal practice and cost.

Ripple and Lifetime

The defining behavior of an aluminum electrolytic capacitor is that it ages with its core temperature, and the core temperature is set by the ambient and the ripple heating. On evaluation hardware the capacitance of a good part changed slowly at a moderate case temperature and much faster when the ripple was pushed to the rated limit in a hot ambient. The lesson is practical: the ripple rating is a limit to stay under, not a target to use in full, and a few degrees of case temperature make a large difference to the life because the aging is exponential. The AiSHi LM series, with a 3000-hour endurance at 105 °C, and the longer-life LT and LG series buy extra margin for products that must run for years.

Paralleling and Sharing

In a bank, the ripple shares across the capacitors, so the total rating is the sum of the individual ratings provided the sharing is even. On the bench the sharing was even when the busbar impedance was balanced, and uneven when it was not, which is why the layout of a bank matters as much as the choice of the capacitors.

Snap-In Parts

The snap-in parts are the practical choice for the lower-current rails and for dense boards. Because they mount directly on the PCB, assembly is simple and no clamp is needed, and the standardized terminal layout drops into a common footprint. The compact 105 °C series provide high capacitance in a small can, while a higher-capacitance part provides the hold-up for a low-voltage rail. The main care point is the board thermal design, because a snap-in capacitor sits in the board's local ambient and can be heated by nearby components.

Lug Terminal Parts

The lug (screw) terminal parts are the workhorses of the high-current DC link. Their busbar connection carries the high current, and their large thermal mass damps the ripple heating, so they tolerate the duty of a motor drive or a UPS. In practice the main care points are the terminal torque and the busbar design, and the clearance around the can for airflow. Because the lug terminal is offered in the same large-can series as the snap-in terminal, a design can choose the assembly that best fits the power stage.

Verdict

The AiSHi aluminum electrolytic range earns its reputation as a cost-effective, high-volume producer. It covers both the board-mounted snap-in and the busbar-connected lug terminal needs with 105 °C long-life series, and it stands up to testing when the ripple and temperature are managed. BeiLuo holds the mainstream models in regional stock and ships them with import declaration, certificate of origin and RoHS documents, so you can evaluate a sample and move to production without a supply gap.