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AEM Components’ High-Current, High-Power-Density Fuses Offer Full Range from 20A to 100A in Single Package Size

CMF Series fuses offer industry-leading safe power density; single package size simplifies circuit designs; robust package available in both commercial and automotive grade

Electronica 2018, Munich, Germany — AEM
AEM Components introduces a new line high-current, high-power density solid body fuses. The new CMF Series is available in both commercial and automotive grade versions, each with part numbers with ratings from 20A to 100A@125 Vdc. All models in this series are offered in the same 2822 surface-mount package. This standardized footprint for all models is a great benefit in platform design. The CMF Series also boasts industry-leading volumetric efficiency (178 mm3) and safe power density (506 VA/mm3@100A) which is about 3 times higher than the existing products in the market.

The CMF Series offer the best-in-class DCR ratings (1.85 mOhms@20A and 0.41 mOhms@100A) which limits excessive overheating due to temperature rise; high interrupt ratings (1500A@60Vdc/250A@125Vdc) and clearing time characteristics (250% < 60s) to support exceptional inrush current withstand capability and a wide operating temperature (-55C to 125C).

“The two major concerns with high current SMD fuses are the diversity of package sizes and safe power density,” reports Dr. Liwu Wang, AEM Components’ Director of Business Development. “AEM’s new CMF Series commercial and automotive grade fuses address both issues with performance that sets a new standard.”

The CMF Series builds on AEM components advanced manufacturing technology. The solid, robust structure of these fuses assures reliable operation in environments where temperature cycling and high mechanical vibration are present. The patented compact design in construction and arc suppression materials make achieving one of the best safe power density in high power applications. The devices singular fuse link/terminal construction eliminates problems that occur with traditional ceramic tube interconnection techniques. AEM’s new technology and products in SMD fuse are very well impressed by the customers and media presses during the Electronica show.

Sample quantities of the competitively-priced CMF Series are now available. Full production of the commercial grade series is scheduled for early 2019. Automotive grade versions are currently undergoing qualification testing to AEC-Q200 and production quantities are expected to be available in Q3 2019. 







 AEM presented a poster titled the “Importance of Reliable Circuit Protection as a Safety Measure in Automotive Applications” at the 18th annual Advanced Automotive Battery Conference (AABC18), June 4-7, 2018, in Hotel del Coronado San Diego, California.


As Electric Vehicles (EV’s) continue to play a larger role in the future of the automotive industry, circuit protection is becoming more and more vital. When faced with extreme high voltage and high current short circuit conditions, traditional fuse technologies have demonstrated an inadequate level of protection, which under certain circumstances, could put passenger safety at risk due to fires or explosions. This presentation highlights some potential concerns and issues associated with traditional options and the importance of insuring proper fuse selection for these system critical EV applications. Extensive studies have been made regarding the arc suppression characteristics and breaking capacities of conventional fuses and how they compare with advanced “Wire-in-Air” AirMatrix® fuses. Continuous arcing observed with conventional fuses is due primarily to secondary conduction of vaporized solder. In contrast, this study demonstrates how advanced solderless AirMatrix® fuse technology could yield much more consistent and reliable performance, making them a much better choice for safe protection in automotive battery pack applications.

Safety was one of the major topics in the battery engineering symposium. AEM’s poster and booth attracted many professional people from brand name EV and battery pack makers allowing for valuable discussions.

The conference focus is to share and discuss the latest technology, applications, and overall development challenges for electric and hybrid-electric vehicles It provides for lively informed discussions and ample networking opportunities to learn and connect with the companies, industry experts, and technology specialists from the entire supply chain of EV, HEV, and EREV vehicles.
The 3-day conference was held at the beautiful Hotel del Coronado in San Diego and the roughly 300 attendees were comprised of research scientists, design engineers, engineering managers, marketing/sales and government officials from around the globe. AEM was one of the sponsors for the AABC18 event.