Mersen SMG4 - Miniature fuse SMG - Fast Acting 350VAC 4A
Mersen

SMG4

Alternate Item Number: SMG4

UPC: 782001237509

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Minimum Qty: 5

Multiplier: 5

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Overview

The Mersen SMG4 Miniature Fast-Acting Fuse (SKU: SMG4) is a 4A, 350VAC-rated fuse designed for compact electronic and industrial applications. This fast-acting fuse features a 5x15mm glass body, allowing visual inspection of the fuse element for quick status verification. Engineered to UL Standard 248-14, it provides rapid response to fault currents, protecting sensitive downstream components. The 5x15mm dimensions ensure compatibility with standard fuse holders, making it a convenient replacement or upgrade. Ideal for power supplies, control panels, and instrumentation, the SMG4 delivers dependable circuit safety backed by Mersen's expertise in electrical protection.
  • 4A fast-acting fuse rated for 350VAC applications
  • 5x15mm glass body for visual element inspection
  • UL Standard 248-14 compliant for reliable performance
  • Compatible with standard 5x15mm fuse holders
  • Ideal for power supplies, control panels, and instrumentation

Specifications

AC Voltage Rating
350 V
Amperage Rating
4 A
Application
Electronic circuits
Brand Name
Mersen
Class
Supplemental
Connection
Ferrule
Current Rating
4 A
Material
Glass
Mounting
Clip
Series
SMG
Size
0.57 x 0.18 in
Size
14.478 x 4.572 mm
Size
5 x 15 mm
Special Features
Glass body Fast Acting 5 x 15 mm
Standard
1/2A through 7A, 350VAC, UL and CSA Recognized 8A & 10A 125 VAC
Type
4.5x14.5mm
Voltage Rating
350 VAC
Package Dimensions (L x W x H)
0.57 in x 0.18 in x 0.18 in
Package Dimensions (L x W x H)
14.478 mm x 4.572 mm x 4.572 mm
Package Weight (Imperial)
0.010 lb
Package Weight (Metric)
0.005 kg
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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.