The distinction lies in the type of power grid they are designed for. While the JETAF series is engineered for AC input networks, the JETDF series is dedicated exclusively to DC power architectures. JETDF filters are specifically optimized to suppress conducted emissions in direct current systems (such as 24V, 28V, 48V, or high-voltage DC buses) and are the perfect companion for our isolated DC/DC converters.
High-power switching DC/DC converters inherently generate high-frequency noise that can reflect back onto the host system’s DC bus. While internal filtering is enough for commercial use, defense and aerospace applications require absolute silence on the power line. Integrating a JETDF filter guarantees robust differential and common-mode noise suppression, ensuring your entire system easily passes strict MIL-STD-461 (CE101, CE102) and DO-160 conducted emission tests.
Yes, this is a critical feature for military and heavy industrial transport. DC grids in vehicles are notoriously unstable. Specific models within the JETDF series feature integrated Transient Voltage Suppression (TVS) networks. They absorb severe voltage spikes, inductive load dumps, and electrical transients, ensuring full compliance with vehicle power standards like MIL-STD-1275 and preventing catastrophic damage to downstream electronics.
Wiring mistakes happen, especially in field maintenance, and reversing the DC input can instantly destroy an entire array of power supplies. To prevent this, many JETDF modules incorporate active reverse polarity protection. If the positive and negative terminals are accidentally swapped, the filter blocks the current, safely protecting both the filter itself and all downstream DC/DC converters.
Absolutely. You do not need a separate filter for every single DC/DC module on your board. A single appropriately sized JETDF filter can act as a centralized DC power entry module. Simply calculate the maximum combined input current of all your downstream loads, and select a JETDF model with a continuous current rating that comfortably exceeds that total to avoid saturating the magnetic chokes.
