Ross Hill 0301-0011-00 Fuse, ATQ3.5

Ross Hill 0301-0011-00 identifies the 3.5 A ATQ3.5 time-delay midget fuse, cataloged by Mersen as ATQ3-1/2. The exact item is rated 500 VAC at 50/60 Hz in a 10 x 38 mm ferrule format. Mersen classifies ATQ as a 500 VAC midget time-delay series for supplemental protection. The family data publishes a 12-second time delay at 200 percent rating and a 10 kA interrupting rating.

Independent supplier. Edmundson Industrial is not appointed, endorsed, or sponsored by Ross Hill, NOV, GE, ABB, Mersen, or any other manufacturer named on this page. Names and part numbers appear for identification only. Availability, condition, price, and lead time are confirmed for each request.

Part-number identification

ATQ3-1/2 fixes the manufacturer family, 3.5 A rating, time-delay characteristic, voltage class, and physical format. Match all of those fields with the fuse holder, protected load, and available fault current.

The complete installed label remains the ordering reference. Match the part number, electrical ratings, physical interface, and circuit duty before approving a replacement.

ATQ time delay protects control circuits through inrush

Control transformers, solenoids, and motor-control circuits can draw temporary inrush. The published ATQ delay prevents a permitted short-duration inrush from being treated like a sustained overcurrent. Coordination still depends on the actual load and equipment design.

Supplemental protection is the application boundary

Mersen states that ATQ3-1/2 is not for branch-circuit protection. Use it only where the equipment design calls for a supplemental midget fuse. A matching ampere and voltage marking does not authorize a different protection role.

The holder is part of the selection

The 10 x 38 mm (1-1/2 x 13/32 in.) cartridge must be checked with the installed holder. Confirm the holder catalog number, voltage rating, terminal condition, rejection or indication features, required approvals, and the circuit fault duty before returning it to service.

ATQ3.5 and ATQ3-1/2 identify one ampere value

Three and one-half amperes can be written as 3.5 or 3-1/2. Use ATQ3-1/2 for the current Mersen catalog item and retain ATQ3.5 in searches and legacy cross-reference records. Do not shorten either form to ATQ3, which is a separate 3 A fuse.

Also searched as

0301-0011-00 · 0301001100 · ATQ3.5 · ATQ3-1/2 · ATQ 3.5 amp fuse · Mersen ATQ3-1/2

What to send with your request

Identify the exact series, time characteristic, voltage, ampere rating, and holder.

• Complete RHCC number and every catalog marking on the fuse
• Photographs of the fuse and holder markings
• Circuit voltage, frequency, and AC or DC designation
• Protected load, expected inrush, and equipment function
• Required approvals, holder number, and available fault-current information
• Quantity required, acceptable condition, and need-by date

A purchase order is not required for an identification review. Send the complete numbers and clear equipment photographs so the quoted item can be checked against the application.

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