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Sierra FS84120 Marine Battery Fuse Holder 50A with Protective Cap

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

FS84120
06/02/2036 9:03 AM
Sale Price

$19.92

4 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra FS84120 marine-rated battery fuse holder provides essential circuit protection directly at the battery source. This bolt-down fuse holder mounts securely onto the positive battery stud, making it ideal for high-vibration marine environments where reliability is critical.

Key Features:

  • Ignition protected when used with Sierra MRBF fuses for safe marine electrical systems
  • Bolt-down design withstands constant vibration on boats and marine vessels
  • Standard isolated M8 stud design allows stacking of multiple terminals for flexible wiring
  • Protective insulating cap prevents accidental shorts and protects connections from moisture
  • Compact footprint fits in tight engine compartments and battery boxes
  • Clear fuse window provides easy visual fault indication without disassembly
  • 300A maximum amperage rating handles high-current applications
  • Meets ABYC requirements for DC main circuit protection on large battery banks

This fuse holder is designed for demanding marine applications including DC main circuits, bow thrusters, inverters, and windlass systems. The high-interrupt rating ensures reliable protection for critical electrical systems. Includes 50A MRBF fuse. The isolated stud design and protective cap make this an excellent choice for professional marine electrical installations where safety and compliance are paramount.

Products specifications

Amps

50

Color

Red

Fast and easy process, very good deal !

Good price with a quick delivery time

Quick service, thank you!

great

great and simple

It was done very well

great so far.

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