Blue Sea 7721 Mega & AMG Safety Fuse BlockView all products in Fuse Blocks and Holders #:  25229
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Blue Sea 7721 Mega & AMG Safety Fuse Block

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Free Shipping This Item qualifies for Free Shipping on orders over $99! More Info...

Uses any MEGA or AMG Fuse.
More Details...   #25229
Brand:  Blue Sea Systems
MFG Part#:   7721
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Blue Sea 7721 MEGA® / AMG® Safety Fuse Block - Uses any MEGA or AMG Fuse.

  • Ignition protected for installation aboard gasoline or diesel powered boats
  • Sealed cover protects fuses from the harsh marine environment
  • Insulating cover satisfies ABYC/USCG insulation requirements
  • Cover breakouts allow wire access in any direction
  • Accepts Blue Sea Systems Square Format standard or custom label
  • Fuses sold separately
  • Meets ISO 8846 ignition protection, and SAE J1171 external ignition protection requirements
  • Maximum Amperage (Dependent on use of appropriately sized fuses and wire for a given application): 300A with 4/0 AWG (70 mm) cable
  • Maximum Voltage 32V DC
  • Stud Size M8 x 1.25
  • Recommended Stud Torque 120 in-lb (13.56 N·m)
  • Ring Terminal Size M8 (5/16")
  • Weight 0.15lb (0.07 kg)


Cover Material Polycarbonate
Maximum Terminal Torque 110 in-lbs
Maximum Amperage 300 Amperes DC
Weight Lb (Kg) 0.35 (0.16)
Maximum Voltage Rating 32 Volts DC
Base Material Reinforced PBT
SEA Fuses Available 100-300 Amperes DC

Share your knowledge of this product with other customers... Be the first to review this product Shipping FAQ

Q. Do you offer Free Shipping?
A. We have free ground shipping via UPS or Canada Post within Canada on most orders of $99 or more (pre-tax).

Q. What do you mean by most orders?
A. Some items are exempt from this offer and are indicated on the product page. Exempt items are usually bulky or heavy items such as buoys. Over 98% of the items on qualify for the free shipping offer.
To see what your shipping charge (if any) will be you can add the item(s) and quantities to the shopping cart and you will see a shipping cost calculator

Q. Where do you ship from?
A. We ship from Halifax, NS

Q. What is the delivery time?
A.  NS, NB, PE: 1 - 2 business days,
      ON, QC, NL: 2- 4 business days
      MB, SK, AB: 4-5 business days
      BC: 5-7 business days
When your order ships you will be emailed a tracking number which will give you the scheduled delivery date

Q. Do you offer Express Shipping?
A. We offer Express Shipping on some orders depending on the items ordered and the delivery address. If Express shipping is available for your order you will see the option on the checkout page. If you do not see the Express option and you want Express shipping please send an email and we will provide you with a quote (

Q. Do you require a signature on delivery?
A. We sometimes add a signature requirement especially if it is a high value package

Please Note:
Very Remote areas are exempt from Free Shipping offer. These are typically remote northern areas. Nunavut as well as many parts of the Yukon and NWT are exempt from free shipping

Money Back Guarantee
Guarantee You may return your purchase to us (with a return authorization number - use this form) within 30 days and we will refund the purchase price of the product. Items which are cut to order (rope, wire etc), software, chart cards and printed materials (paper charts, books) are not returnable.

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