Ferraz Shawmut A4BY1200 1200A 600V Class L Time Delay Current Limiting Fuse
Ferraz Shawmut A4BY1200 1200A 600V Class L Time Delay Current Limiting Fuse

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Ferraz Shawmut

Ferraz Shawmut A4BY1200 1200A 600V Class L Time Delay Current Limiting Fuse

Only 3 left
SKU: BY1200 UPC: 782001939168
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$500.00
-20% $625.00 $500.00
Only 3 left
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Condition

A4BY1200 application note: Mersen/Ferraz Shawmut A4BY1200 is an Amp-Trap fuse in the UL Class L family for high-capacity service and feeder protection. Its delayed response allows normal system inrush while the current-limiting design reduces fault energy under specified conditions.

A4BY1200 specifications

  • Catalog number: A4BY1200
  • Series: A4BY Amp-Trap
  • Fuse class: UL Class L with time delay
  • Current: 1200A
  • Voltage: 600VAC / 300VDC
  • Terminal form: Class L blade/bolted connection

Coordination matters

A4BY fuses are 100%-rated and have a minimum four-second delay at 500% of rating. That behavior is useful for inrush and ground-fault coordination, but it must be checked against the project's time-current and arc-flash studies.

Fuse and holder verification

Confirm the exact A4BY1200 marking, Class L mounting dimensions, voltage, interrupting requirement, holder hardware, and equipment listing. Do not install or remove a fuse on energized equipment. Selection and service should be handled by qualified electrical personnel.

There is a $15 charge for delivery. Additional charges will be imposed by our couriers for delivery to remote areas, a surcharge may be levied to cover carriage to these areas.

Warranty Coverage

We stand behind every product we sell. Coverage depends on the condition of the item at time of purchase:

  • New: 12-month warranty
  • New Open Box: 10-month warranty
  • Reconditioned: 90-day warranty

Warranty coverage begins on the date of delivery and covers manufacturing and functional defects under normal use. It does not cover damage from misuse, improper installation, or unauthorized repair. To make a warranty claim, contact us at support@breakersmart.com with your order number and a description of the issue.