Depends on the voltage across the fuse. For fuses rated below 9 amps, the two types are almost identical (MDL has slightly lower AC Interrupting amperages), and both are rated for use up to 250V. For fuses rated above 9 amps, the MDL fuses are rated for use up to 32V, while the MDA fuses are rated for use up to 250V. More info on Cooper Bussmann (link below).
The difference between MDL fuses and ADL fuses are that MDL fuses are a slow blow fuse with a long time lag. ADL fuses on the other hand, are normal blow fuses with a medium time lag.
Time delay fuse.
Slow, 1/4" glass fuse. Long obsolete. Replaced by Bussmann MDL fuses.
AGC Series Fast-Acting Glass Tube ABC Series Fast-Acting Ceramic Tube MDL Series Time-Delay Glass Tube MDA Series Time-Delay Ceramic Tube GBB Series Very Fast-Acting Ceramic Tube
MDL Chime was created in 1998.
My dad Col. David Q. Cummings - Dfc mdl Also received during his carear - am mdl , AF comedation mdl, Pres Unit Citation, Af Outstanding Unit Awd, Combat rediness mdl, AF good conduct mdl, American Def Svc Mdl, National Def Svc mdl, Korean Svc mdl, Vietnam Svcmdl w/BSS (what ever BSS is ?), Af Long gevity svc Awd, Expert Marksman-Af, Meritorious Svc mdl, Air Medal , AF Commendation mdl, and Rp of VN Campaign mdl. I think that's all. OH, Outstanding dad award.
JB MDL Dix was created in 1917.
JB MDL McGuire was created in 1942.
It was manufactured between 1963-1971
1952, Wnichester Mdl 70 and Mdl 88
The airport code for JB MDL McGuire is WRI.