What type of power fuse is used in the 24VAC controllers?

Issue

Having blown the power fuse of a i2/b3 controller what is its part number?

Product Line

Andover Continuum

Environment

Fuse replacement

i2 and b3 controllers

Power fuse

Fuses

24VAC supply

Cause

The fuse type used is not documented.

Resolution

Most controller fuses are not supplied through the factory.

Faulty controllers can be repaired through the regular repairs process, but power fuses can be purchased through local suppliers.

The power fuse for the following 24VAC controllers is:

Type: Surface Mount Fuse
NANO2® Very Fast-Acting, 448 Series

Datasheet

2A Rating: i2/b3867, i2/b3850 series. (If you purchase via the US, this fuse is currently avaliable in iPortal with part number: 01-2180-004)

3A Rating: bCX1, i2/b3810 series, i2/b3800 series, i2/b3600 series. (If you purchase via the US, this fuse is currently avaliable in iPortal with part number: 01-2180-009)

5A Rating ACX5740, ACX5720

Note: Fuses are fitted to protect the controllers from damage, when replacing one always replace it with an equivalent rating. Also determine the reason why a fuse has blown before replacing, under normal operation a fuse should never blow.
 

CX9702 (115 VA) Main Power Fuse 250 VAC 1.5Amp

Outputs have 125 VAC 3.5Amp replaceable

Inputs/Outputs are surface mount non-replaceable

For i2/b3814 outputs see Lessons Learned Article #7583