Eaton ABC-1/2-R 500 mA Fast-Blow Fuse - 1/4 x 1-1/4 in, 250 Vac

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pEaton ABC-1/2-R — 500 mA, 250 V, fast-acting fuse, 35 A at 250 Vac; 10,000 A at 125 Vac; 10,000 A at 125 Vdc interrupting./p

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250V Fuse Eaton Fuse Ceramic Tube Fuse Fast-Acting Fuse 500mA Fuse

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Eaton ABC-1/2-R 500 mA Fast-Blow Fuse - 1/4 x 1-1/4 in, 250 Vac

The ABC-1/2-R from Eaton carries 500 mA, rated 125 Vdc, uses a fast-acting element.

Technical Data

Parameter	Rating
Part number	ABC-1/2-R
End caps	nickel-plated brass
Rated current	500 mA (1/2 A)
Design standard	UL 248-14
Voltage rating, DC	125 Vdc
Voltage rating	250 Vac
Typical voltage drop	0.41 V
Typical melting I2t	0.039 A²s
Element	single element
Typical DC cold resistance	0.587 Ω
AC interrupting rating	35 A at 250 Vac; 10,000 A at 125 Vac; 10,000 A at 125 Vdc
Body	Ceramic tube, 1/4 x 1-1/4 in (6.4 x 31.7 mm)

Practical Notes

Interrupting capability is 35 A at 250 Vac; 10,000 A at 125 Vac; 10,000 A at 125 Vdc — confirm the circuit's prospective fault current stays below this.
Fast element suits resistive and semiconductor loads rather than motors with high inrush.
Because it opens within milliseconds, downstream semiconductors see less let-through energy.
Working voltage must stay at or below 125 Vdc; a lower-rated part is not a safe substitute.
Do not upsize beyond 500 mA to stop nuisance trips — fix the cause instead.

Application Scenarios

Common installation contexts include:

EV

Questions and Answers

What are the ratings of the ABC-1/2-R?

500 mA continuous at 125 Vdc, interrupting rating 35 A at 250 Vac; 10,000 A at 125 Vac; 10,000 A at 125 Vdc.

Is the ABC-1/2-R fast-acting or time-delay?

It is fast-acting. Expect it to open quickly on overload.

Can the ABC-1/2-R be used on a higher fault-current circuit?

No — its interrupting rating is 35 A at 250 Vac; 10,000 A at 125 Vac; 10,000 A at 125 Vdc. Choose a part whose breaking capacity exceeds the prospective fault current.

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