What does "HAC" mean for a T2A, 250 V HAC, slow-blow Fuse?

[metrologist]

All I find is stuff about Honda and hill-climb assist.

[ArthurDent]

"HACR stands for “Heating, Air-conditioning, refrigeration” For equipment or in a panel or enclosure feeding the HACR rated equipment."

Apparently these fuses are rated for inductive loads like motors, etc., and can stand repetitive inrush current on equipment start-up. It would be wise to replace with the same type and rating of fuse. I found one size on Amazon.

https://www.amazon.com/Edison-HAC-R-30-Buss-FUSE-HACR30/dp/B009EC7F1W

[tooki]

If you google "HAC fuse -honda", you quickly find reference to the Bussmann HAC-R fuse line. However, it seems to be larger, high-current fuses.

It looks like HAC-R was a series of current-limiting fuses: http://www.cooperindustries.com/content/dam/public/bussmann/Electrical/Resources/product-datasheets-a/Bus_Ele_DS_1038_HAC-R.pdf

[tooki]

And this is the recommended replacement, which does have a 2A model: http://www.cooperindustries.com/content/dam/public/bussmann/Electrical/Resources/product-datasheets-b/Bus_Ele_DS_1019_FRN-R_1_10-60A.pdf

[metrologist]

This is the actual part number for the fuse as it comes from the MFG. I don't HAC should be listed. 

https://www.newark.com/littelfuse/0213002-mxp/fuse-cartridge-2a-5-x-20mm-slow/dp/26K7595

[metrologist]

It goes in a low power device like an O-scope.

[tooki]

So I guess they just needed any old slow-blow fuse and got a good deal on those HVAC ones.