Mersen STG-V3/8 - 250V Time-Delay Glass 4.5mm x 14.5mm 250 Volts 0.375 Amps STG-V series.
Mersen

STG-V3/8

Alternate Item Number: 782001245504

UPC: 782001245504

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Multiplier: 10

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Overview

The Mersen STG-V3/8 is a precision-engineered time-delay glass fuse, meticulously designed to provide robust and reliable circuit protection for a wide array of industrial and electronic applications. Manufactured by Mersen, a globally recognized leader in electrical protection and power management, this fuse (SKU: STG-V3/8) exemplifies the company's commitment to quality, safety, and performance. At its core, the STG-V3/8 is built to safeguard sensitive electronic components and electrical systems from the damaging effects of overcurrents and short circuits. Its time-delay characteristic is crucial for applications where temporary, harmless inrush currents are common, such as motor starts or capacitor charging. This feature allows the fuse to withstand these brief surges without nuisance blowing, thereby ensuring uninterrupted operation and extending the lifespan of connected equipment. Conversely, it will reliably interrupt the circuit during sustained overloads or dangerous short circuits, preventing catastrophic failures and potential fire hazards. Key specifications of the Mersen STG-V3/8 include a maximum voltage rating of 250V, making it suitable for a broad spectrum of low-voltage industrial power distribution and control systems. The precise current rating of 0.375 Amps is critical for protecting low-power electronic circuits, control boards, and instrumentation where precise current management is paramount. The compact physical dimensions of 4.5mm in diameter and 14.5mm in length (often referred to as 5x20mm or similar metric equivalents) are a significant advantage, allowing for easy integration into densely populated circuit boards, compact enclosures, and specialized equipment where space is at a premium. This fuse is a component of Mersen's esteemed STG-V series, a line known for its consistent performance and adherence to stringent industry standards. Industries that commonly benefit from the reliable protection offered by the Mersen STG-V3/8 include: * **Industrial Automation:** Protecting control panels, PLCs, sensors, and actuators. * **Telecommunications:** Safeguarding sensitive network equipment and power supplies. * **Medical Devices:** Ensuring the safety and reliability of critical healthcare instrumentation. * **Consumer Electronics:** Providing protection in high-end audio-visual equipment and power adapters. * **Test and Measurement:** Protecting delicate laboratory instruments and diagnostic tools. Selecting the correct fuse is a critical step in system design and maintenance. Professionals rely on Mersen for fuses like the STG-V3/8 because of the manufacturer's deep understanding of electrical phenomena and their rigorous testing procedures. The consistent quality and predictable performance of Mersen fuses minimize downtime and reduce the risk of costly equipment damage. The glass construction of this particular fuse offers visual indication of a blown element (though visual inspection is not always a reliable method of confirmation), and its hermetically sealed design protects the internal element from environmental contaminants. When specifying fuses for critical applications, it is essential to match the fuse's voltage, current, and time-current characteristics to the protected circuit's requirements. The Mersen STG-V3/8, with its specific 250V, 0.375A time-delay rating and compact form factor, is an excellent choice for engineers and technicians seeking dependable protection for low-power, sensitive circuits. Trust in Mersen's legacy of innovation and quality to ensure the safety and longevity of your electrical systems.
  • 250V AC/DC voltage rating for versatile industrial applications.
  • 0.375 Amp current rating ideal for low-power sensitive circuits.
  • Time-delay characteristic protects against inrush currents without nuisance blowing.
  • Compact 4.5mm x 14.5mm glass construction for space-constrained designs.
  • Manufactured by Mersen, a trusted leader in electrical protection solutions.

Specifications

Amperage Rating
0.375 A
Application
Electronic circuits
Brand Name
Ferraz Shawmut
Connection
Ferrule
Current Rating
0.375 A
Interrupt Rating
0.035 kA
Material
Glass
Mounting
Clip
Series
STG-V
Size
4.5mm x 14.5mm
Special Features
Glass Body Fasting Acting 4.5 x 14.5mm 2AG SMG-V fuses have 1-1/2" wire lead each end.
Standard
1/10A & 3/8A, 250VAC UL Listed CSA Cert., 1/8A - 7A, 350VAC, UL/CSA Recognized 8A & 10A, 125VAC RoHS Compliant
Type
4.5 X 14.5 mm miniature fuses
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
3.59 IN x 0.217 IN x 0.217 IN
Package Dimensions (L x W x H)
9.1186 cm x 5.5118 mm x 5.5118 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.

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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.