Eaton S506-1.25-R 1.25 A 250 Vac Time-Delay Glass Tube Fuse
Eaton S506-1.25-R 1.25 A 250 Vac Time-Delay Glass Tube Fuse

Eaton S506-1.25-R 1.25 A 250 Vac Time-Delay Glass Tube Fuse

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pEaton S506-1.25-R — 1.25 A, 250 V, time-delay glass cartridge fuse, 35 A at 250 Vac, 50 Hz interrupting./p
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    Eaton S506-1.25-R 1.25 A 250 Vac Time-Delay Glass Tube Fuse

    Eaton S506-1.25-R 1.25 A 250 Vac Time-Delay Glass Tube Fuse belongs to the Eaton range. It carries 1.25 A, rated 250 Vac, uses a time-delay element, in a glass body.

    Technical Data

    ParameterRating
    ParameterValue
    Orderable part numberS506-1.25-R (BK- prefix = 100 pcs carton, BK1- = 1,000 pcs polybag)
    Current rating1.25 A
    Interrupting rating35 A at 250 Vac, 50 Hz
    Typical melting I2t10.05 A2s
    Body5 x 20 mm glass tube, nickel-plated brass end caps
    Dissipation at rating0.11 W
    DC cold resistance, typical0.059 Ohm
    AgencycURus (E19180, JDYX2); SEMKO; VDE; BSI; IMQ; PSE (JET); KC; CCC
    Typical voltage drop86 mV at rated current
    Design standardIEC 60127-1 and 60127-2
    Time-delay classT (time-lag)
    Voltage rating250 Vac

    Design Notes

    • Interrupting capability is 35 A at 250 Vac, 50 Hz — confirm the circuit's prospective fault current stays below this.
    • Time-delay element rides through motor starting and capacitive inrush without nuisance opening.
    • Startup surges of several times rated current are tolerated for a short window.
    • Glass body lets you inspect the element after a fault.
    • Best kept for lower fault-current circuits where visual diagnosis matters.
    • Working voltage must stay at or below 250 Vac; a lower-rated part is not a safe substitute.
    • Do not upsize beyond 1.25 A to stop nuisance trips — fix the cause instead.

    Where It Is Used

    Typical places this fuse turns up:

    • EV
    • appliance
    • transformer

    Common Questions

    What are the ratings of the S506-1.25-R?

    1.25 A continuous at 250 Vac, interrupting rating 35 A at 250 Vac, 50 Hz.

    Is the S506-1.25-R fast-acting or time-delay?

    It is time-delay. It tolerates short inrush surges.

    Can the S506-1.25-R be used on a higher fault-current circuit?

    No — its interrupting rating is 35 A at 250 Vac, 50 Hz. Choose a part whose breaking capacity exceeds the prospective fault current.

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