Mersen STG-V3 - Miniature fuse STG-V - Time-Delay 350VAC 3A
Mersen

STG-V3

Alternate Item Number: STG-V3

UPC: 782001245610

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Minimum Qty: 10

Multiplier: 10

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Overview

The **Mersen STG-V3 Miniature Time-Delay Fuse** is a high-performance, glass-body fuse designed for precise circuit protection in industrial and commercial applications. Rated at **350VAC and 3A**, this fuse combines reliability with fast-acting response to safeguard sensitive electronic components from overcurrent conditions. Engineered with a **time-delay** characteristic, the STG-V3 allows brief inrush currents—common in motors, transformers, and capacitive loads—without nuisance tripping, ensuring uninterrupted operation while maintaining critical protection. **Key Features and Specifications:** - **Voltage Rating:** 350VAC, making it ideal for high-voltage industrial circuits. - **Current Rating:** 3A, providing precise protection for low-to-medium current applications. - **Material:** High-quality glass body ensures durability and clear visibility of the fuse element for quick inspection. - **Dimensions:** Compact **5x15mm** design allows for easy integration into tight spaces and standard fuse holders. - **Series:** Part of Mersen’s **STG-V series**, known for consistent performance and adherence to international safety standards. **Industry Applications and Use Cases:** The STG-V3 is widely used across multiple sectors, including **power distribution, telecommunications, industrial machinery, and renewable energy systems**. Typical applications include: - Protection of **control circuits** in PLCs and automation systems. - Safeguarding **transformers and power supplies** from transient overloads. - Use in **HVAC systems**, where inrush currents from compressors and motors require time-delayed response. - Critical roles in **solar inverters and wind turbine controllers**, where stable operation under variable loads is essential. **Why Choose Mersen for Fuse Protection?** Mersen, a global leader in electrical protection and thermal management solutions, has built a reputation for innovation and reliability. The company’s fuses, including the STG-V3, are trusted by engineers worldwide due to: - **Stringent Quality Control:** Each fuse undergoes rigorous testing to meet or exceed industry standards, including **UL, IEC, and CE certifications**. - **Proven Performance:** Mersen’s fuses are deployed in mission-critical applications, from aerospace to heavy industrial equipment, where failure is not an option. - **Technical Support and Expertise:** Mersen provides comprehensive documentation, including datasheets and application guides, to assist engineers in selecting the optimal fuse for their systems. - **Sustainability Focus:** The company emphasizes eco-friendly materials and manufacturing processes, aligning with modern industrial sustainability goals. **Installation and Selection Considerations:** When selecting a fuse like the STG-V3, professionals must consider several factors to ensure optimal protection: - **Voltage Compatibility:** Ensure the fuse’s voltage rating (350VAC) matches or exceeds the system voltage to prevent breakdown. - **Current Rating:** The 3A rating should align with the circuit’s nominal current while accounting for startup surges. - **Time-Delay vs. Fast-Acting:** The STG-V3’s time-delay feature is ideal for applications with transient inrush currents, whereas fast-acting fuses are better for sensitive electronics. - **Environmental Conditions:** Glass-body fuses like the STG-V3 are suitable for most indoor environments but may require additional protection in dusty or corrosive settings. - **Fuse Holder Compatibility:** Verify that the fuse dimensions (5x15mm) fit standard fuse holders or clips in your system. **Industry Trends and Future-Proofing:** As industrial systems become more complex and interconnected, the demand for reliable, high-performance fuses continues to grow. The STG-V3 addresses this need by offering a balance of **speed, precision, and durability**. Additionally, Mersen’s commitment to R&D ensures that products like the STG-V3 remain at the forefront of electrical protection technology, supporting advancements in **smart grids, electric vehicles, and industrial IoT**. For engineers and procurement professionals seeking a trusted, high-quality fuse solution, the **Mersen STG-V3 Miniature Time-Delay Fuse** delivers unmatched performance, backed by decades of expertise in electrical protection. Whether protecting a single control circuit or an entire power distribution system, this fuse is a dependable choice for safeguarding your most critical assets.
  • 350VAC voltage rating for high-voltage industrial applications
  • 3A current rating with time-delay feature for inrush current handling
  • Glass body for durability and easy inspection
  • Compact 5x15mm size fits standard fuse holders
  • Part of Mersen’s trusted STG-V series for reliable protection

Specifications

AC Voltage Rating
350 V
Amperage Rating
3 A
Application
Electronic circuits
Brand Name
Mersen
Class
Supplemental
Connection
Ferrule
Mounting
Clip
Size
4 x 0.18 in
Size
101.6 x 4.572 mm
Special Features
Glass body Time-delay 5 x 15 mm
Standard
1/2A through 7A, 350VAC, UL and CSA Recognized
Type
4.5x14.5mm
Voltage Rating
350 VAC
Package Dimensions (L x W x H)
4 in x 0.18 in x 0.18 in
Package Dimensions (L x W x H)
101.6 mm x 4.572 mm x 4.572 mm
Package Weight (Imperial)
0.010 lb
Package Weight (Metric)
0.005 kg
Miniature fuse STG - Time-Delay 350VAC 3A

STG3

Miniature fuse STG - Time-Delay 350VAC 3A
FUSE 250V FA 3AB PB-FREE H-PACK 3A. The 3AB Very Fast-Acting Fuse for protection of Silicon Controlled Rectifiers and similar solid-state devices. Features: Designed to meet UL248-14. RoHS Compliant and Lead-Free. Available in cartridge type only.

H332003P

FUSE 250V FA 3AB PB-FREE H-PACK 3A. The 3AB Very Fast-Acting Fuse for protection of Silicon Controlled Rectifiers and similar solid-state devices. Features: Designed to meet UL248-14. RoHS Compliant and Lead-Free. Available in cartridge type only.

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.