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Mersen H302779 - Cylindrical fuse-link aM Size 10x38 IEC 690VAC 1A
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Mersen H302779 Cylindrical fuse-link aM Size 10x38 IEC 690VAC 1A

Alternate Item Number: FR10AM69V1


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Specification Sheet

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Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

Mersen H302779 cylindrical fuse-link aM (Size 10x38) is a high-performance partial-range fuse designed for industrial electrical distribution circuits. Rated at 690VAC and 1A, this fuse provides robust short-circuit protection with a breaking capacity of 120kA, ensuring reliable operation in high-fault-current environments. The ceramic body and silver-plated contacts deliver superior thermal stability and low power dissipation (0.2W at 1A), minimizing energy loss and heat generation. Engineered for motor circuit protection, the H302779 aM fuse cuts off currents exceeding 6.3xIn, safeguarding sensitive equipment from destructive overcurrents. Its compact 10x38mm cylindrical design with axial leads allows for easy integration into IEC-compliant fuse holders and switchgear. The fuse-link is optimized for installation switchgear in motor circuits, where precise current rating selection aligns with motor nominal currents for optimal protection. Manufactured by Mersen (France), the H302779 combines decades of fuse technology expertise with rigorous quality control to ensure consistent performance. Suitable for 400VAC to 690VAC systems, this fuse-link is a critical component in industrial automation, power distribution, and machinery protection applications.
  • Rated 690VAC, 1A with 120kA breaking capacity for high-fault-current protection
  • Ceramic body with silver-plated contacts for thermal stability and low power dissipation (0.2W at 1A)
  • Size 10x38mm cylindrical design with axial leads for IEC-compliant fuse holders
  • Partial-range aM fuse cuts off currents >6.3xIn, protecting motors and switchgear
  • Optimized for motor circuit protection with precise current rating alignment

Specifications

AC Voltage Rating
690 V
Amperage Rating
1 A
Application
aM type for protection of motors, transformers and other loads with in-rush currents.
Body Material
Ceramic
Brand Name
Mersen
Connection
Ferrule
Connection Material
Silver-Plated Copper
Interrupt Rating
120 kA
Mounting
Clip
Size
1.5 x 0.41 in
Size
38 x 10.3 mm
Special Features
Reduced size Visual indication of fuse operation Safest and most reliable protection system Optional indicator
Standard
IEC 60269-1 & -2 (electrically only for the range with striker) Approved by various shipping organizations
Type
IEC Cylindrical Fuse-Links
Package Dimensions (L x W x H)
1.5 in x 0.41 in x 0.41 in
Package Dimensions (L x W x H)
38 mm x 10.3 mm x 10.3 mm
Package Weight (Imperial)
0.018 lb
Package Weight (Metric)
0.008 kg
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Frequently Asked Questions

What is the voltage range for these fuse-links?

The voltage range for these fuse-links is 400 to 690 VAC.

What is the ampere range for these fuse-links?

The ampere range for these fuse-links is from 0.16 A to 32 A.

What is the breaking capacity of these fuse-links?

The rated breaking capacity for these fuse-links is 120 kA AC (IEC) for most variants, and 100 kA AC for variants with a striker.

What materials are the fuse-links made of?

These fuse-links have ceramic bodies and silver-plated copper contacts.

What are the dimensions of the 10x38 fuse-links?

The dimensions are 10.1 mm diameter and 38 ± 0.6 mm length for standard versions, with slight variations for versions with indicators or strikers.

What applications are these fuse-links suitable for?

They are suitable for protecting motors, transformers, and other loads with in-rush currents in electrical distribution circuits and industrial applications.

What is the purpose of the 'aM' classification?

The 'aM' classification indicates partial range fuses used for protecting electrical devices against destruction from high short-circuit currents.

Are there options for activating an auxiliary contact?

Yes, size 10x38 fuse-links are available with an optional striker to activate an auxiliary contact.

Are there options for visual indication of fuse operation?

Yes, some models are available with an optional visual indicator to show fuse operation.

What is the weight of a single fuse-link?

The weight of a single fuse-link is approximately 8.3 g for standard versions and 9.2 g for versions with a striker.

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.