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Qualification is done to validate the initial component capability to meet the critical specification requirements; while Group C Testing is done to validate a given component manufactured lot meets the critical specification requirements.

EM stands for Engineering Models. Engineering Models are shipped with a C of C only. 

A slow blow fuse is different from a fast acting fuse in its capability to withstand transient pulse currents, i.e., it can withstand the surge current upon power-on/off, thus ensuring the equipment works normally. Therefore, slow blow fuses are often called time-delay fuses. Technically, a slow blow fuse features a higher I2t value, and it requires more energy to blow, so it is more capable of withstanding pulses compared with a fast acting fuse of same rated current.

Per MIL-PRF-23419/12F here is the list and table of the group B testing. 

Group C inspection: Group C inspection shall be in accordance with MIL-PRF-23419, except 16 samples shall be subjected to the subgroup I inspections as specified in table V. Maximum clearing I2t for subgroups II and IV shall be performed at 600 percent of the +25°C rated current.

The "H" designation signifies that a high temperature solder has been used in the manufacture of the fuse.

Submit a request for information through the AEM website.

We create STEP files at the customer request, if you would like a STEP file, please email hrcsales@aem-usa.com and we will make a STEP file for you as soon as possible.

"-US" parts are up-screened parts. 

Finished HRB-US products are up-screened to DSCC 03024 specifications.

AEM’s Tin Whisker Mitigation (TWM) process is done by adding lead (Pb) to components with pure tin (Sn) terminals. Our Sn-Pb conversion process involves both Sn-Pb plating and subsequent fusion processing to ensure that the resultant component terminations are a homogenous mixture of Sn-Pb. The AEM Sn-Pb conversion process is NOT a hot solder dip operation that introduces the risk of thermal shock to the components.

The majority of parts ran (~70%) are passive ferrite chip, capacitors , inductors, resistors. Also able to do active components like diodes and Mosfets

No, AEM HRB/DLA 03024 components are not ESD sensitive.

All AEM Hi-Rel Fuses and our Hi-Rel Beads (HRB/03024 types) products are rated MSL-1 (not moisture sensitive).

Ferrite chip beads are DC current sensitive and not voltage sensitive from an operational perspective. All electrode layers within a ferrite chip bead including AEM’s HRB/03024 series components are at the same voltage potential. The rated DC current should not be exceeded for steady state operating conditions. 

Note that Dielectric Withstanding Voltage (DWV) testing is conducted during Group C Testing per MIL-STD-202-302 (Condition A) with 100V applied between the ferrite body and terminals. DWV testing does not represent a condition we would expect during normal operation, but it does provide one aspect of voltage rating, at least in terms of DWV.