Bussmann F15A250V6AS Eaton series F15A fuse, Military qualified fuse, Silver-plated fuse caps, Instruments, power and telephone, 6 A, Non-indicating, Standard, 250 V

Go by the body size: the F15A250V6AS measures 2 inches long by .562 inch in the other two dimensions. Fuse clips and holders are sized to the body, so measure the holder you are replacing into before ordering. If your existing fuse is a shorter or smaller-diameter cartridge, this one will not seat.

6 amps at 250 volts. That rating is the ceiling, not a target, so it suits a branch or instrument circuit whose operating current sits below 6 A and whose system voltage does not exceed 250 V. Using it on a higher-voltage circuit is not acceptable regardless of the current draw.

It is a military qualified fuse aimed at instruments, power and telephone circuits. That is the kind of low-current, sensitive-equipment service where a controlled 6 A interruption matters more than raw breaking capacity, which is why it shows up in telecom racks, signal and instrumentation panels.

No. The F15A250V6AS is non-indicating, so there is no pop-up pin or lamp to show it has opened. Troubleshooting means pulling the fuse and checking continuity, or metering across the holder. If your maintenance crew relies on a visual check down a row of holders, specify an indicating fuse instead.

The silver plating on the fuse caps is there for contact conductivity and resistance to corrosion at the clip interface. On instrument and telephone circuits where current is low and a few milliohms of contact resistance can show up as signal or measurement error, that plated cap keeps the joint stable over time. For a rough industrial load it is not the deciding feature; for metering and telecom it is.

It comes in standard packaging rather than a bulk or specialty pack, at a listed product weight of .4 lb, which makes it straightforward to hold on a shelf as a spare for instrument and telephone panels. Order by the Bussmann part number F15A250V6AS so you get the 6 A, 250 V silver-capped version and not another rating in the F15A family.