Mersen SMF3 - 300V 3/10 to 10A Fuse for protection of fluorescent lighting fixtures and ballasts 300 Volts 3 Amps SMF series.
Mersen

SMF3

Alternate Item Number: 782001751708

UPC: 782001751708

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Minimum Qty: 5

Multiplier: 5

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Overview

The Mersen SMF3 fuse (SKU: SMF3) is a specialized time-delay fuse engineered for the reliable protection of fluorescent lighting fixtures and their associated ballasts. As part of Mersen's SMF series, this fuse provides robust overcurrent protection, ensuring the longevity and operational integrity of sensitive lighting systems in commercial and industrial settings. With a voltage rating of 300VAC and a versatile current rating from 3/10 Amp to 10 Amps, the SMF3 is designed to precisely match the requirements of a wide array of fluorescent lighting circuits. Mersen, a leader in electrical protection, offers the SMF3 fuse with an interrupting rating (I.R.) of 10kA. This fuse is specifically designed to handle ballast inrush currents, a critical feature for fluorescent lighting applications. Its time-delay characteristic prevents nuisance tripping during normal startup while still providing essential protection against sustained overcurrents and short circuits. The SMF3 is UL Listed (File No. E10480) and CSA Certified, ensuring compliance with industry standards. Key specifications include: Volts: 300VAC, Amps: 3/10 to 10A, I.R.: 10kA. This fuse is compatible with Mersen's SHR fuse holders, which feature integral clips for panel mounting and accommodate standard 7/8" knock-outs. The SMF3 fuse is an essential component for maintaining the safety and efficiency of fluorescent lighting systems, preventing damage to ballasts and lamps, and minimizing downtime. Its compact design facilitates easy integration into existing fixture designs and electrical panels, making it a practical choice for both new installations and retrofitting projects.
  • Time-delay fuse specifically designed for fluorescent lighting fixtures and ballasts
  • 300VAC voltage rating
  • Current ratings from 3/10A to 10A
  • 10kA interrupting rating (I.R.)
  • UL Listed (File No. E10480) and CSA Certified

Specifications

Amperage Rating
3 A
Application
Protection of fluorescent lighting fixtures and ballasts
Brand Name
Ferraz Shawmut
Connection
Bayonet
Current Rating
0.3A-10A
Interrupt Rating
10 kA
Mounting
SHR-1 Or SHR
Series
SMF
Special Features
Integral fuse and insulating cap for use with SHR or SHR-1 fuse holders, fast-acting
Standard
UL Listed/CSA Certified
Type
1/4 X 1-1/4 W/integral Cap
Voltage Rating
300 VAC
Package Dimensions (L x W x H)
1.89 IN x 0.25 IN x 0.25 IN
Package Dimensions (L x W x H)
4.8006 cm x 6.35 mm x 6.35 mm
Package Weight (Imperial)
0.010 L
Package Weight (Metric)
0.005 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.
9F61 Size B Clips 1.6in

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9F61 Size B Clips 1.6in

Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.