Authorized Mersen Distributor
Mersen S076928 - High-Speed Cylindrical Fuse Protistor® Size 10x38 aR 500VAC IEC 4A With Striker

Mersen S076928 High-Speed Cylindrical Fuse Protistor® Size 10x38 aR 500VAC IEC 4A With Striker

Alternate Item Number: A050URD4T13I


Documents & Media
Specification Sheet

Contact for Pricing

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

The Mersen Protistor® Size 10x38 aR 500VAC 4A High-Speed Fuse with Striker (SKU: S076928) is a precision cylindrical fuse designed for semiconductor and power electronics protection in industrial applications. This aR-rated fuse provides an interrupting rating of 50 kA at 500VAC, ensuring reliable fault current interruption in sensitive power semiconductor circuits. With a pre-arcing I²t of 6.7 A²s and clearing I²t of 12 A²s, it delivers fast response to overcurrent conditions critical for protecting inverters, UPS systems, and discrete semiconductor devices. The integrated striker mechanism enables remote indication of fuse operation, improving system monitoring and maintenance efficiency. This 10x38mm cylindrical fuse operates at 1.7W power dissipation at rated current and weighs 9.2g. Compatible with IEC 60269-4 standards, it is part of Mersen's Protistor® series of high-speed fuses for AC protection. The fuse is packaged in quantities of 10 and measures 10.3mm diameter x 38mm length with a maximum diameter of 10.5mm.
  • 10x38mm cylindrical fuse size for semiconductor protection
  • aR-rated for high-speed interruption in power electronics
  • 50 kA interrupting rating at 500VAC
  • Integrated striker mechanism for remote fault indication
  • Pre-arcing I²t: 6.7 A²s, Clearing I²t: 12 A²s
  • 1.7W power dissipation at rated 4A current
  • Compliant with IEC 60269-4 standards
  • Package quantity: 10 fuses per box
  • Weight: 9.2g per fuse

Specifications

AC Voltage Rating
500 V
Amperage Rating
4 A
Brand Name
Mersen
Case
Ceramic
Connection
Ferrule
Mounting
Clip
Size
1.54 x 0.41 in
Size
39.2 x 10.3 mm
Special Features
Voltage rating 500-600 VAC With trip-indicator (1 to 30A), a Mersen speciality (minimum operating voltage for trip-indicator: 20V) Without blown fuse indication 0.10 up to 0.80 A (higher ratings without blown fuse indicator 10x38gRB - 690VAC) aR-Class according to VDE 636-23 IEC 60269-4
Standard
IEC standard 60269-1 IEC standard 60269-4 VDE 636-23
Sub Brand
Protistor®
Type
IEC High-Speed Cylindrical Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
500 V
Wattage
1.8 W
Package Dimensions (L x W x H)
1.54 in x 0.41 in x 0.41 in
Package Dimensions (L x W x H)
39.2 mm x 10.3 mm x 10.3 mm
Package Weight (Imperial)
0.020 lb
Package Weight (Metric)
0.009 kg
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip

30323R

Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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

9F61BWW460

9F61 Size B Clips 1.6in

Frequently Asked Questions

What is the voltage rating for these semiconductor fuses?

These fuses have a voltage rating of 500 to 600 VAC.

What breaking capacity do these fuses offer?

They offer a tested breaking capacity of 200 kA at 600 V and 50 kA at 500 V.

Are there fuses with and without a blown fuse indicator?

Yes, fuses are available without a blown fuse indicator from 0.10 to 0.80 A, and with a trip-indicator from 1 to 30 A.

What is the minimum operating voltage for the trip indicator?

The minimum operating voltage for the trip indicator is 20 V.

What are the dimensions of these ferrule fuses?

The fuses have dimensions of 10.3x38 mm.

What is the pre-arcing I2t for a 1A fuse?

The pre-arcing I2t for a 1A fuse is 0.5 A2s.

What is the Watts loss for a 10A fuse?

The Watts loss for a 10A fuse is 1.9 W at 0.8 IN and 1.3 W at IN.

How does operating voltage affect total clearing time?

The total clearing time (I2tt) and duration (tt) vary with the operating voltage (U), as shown in the corrective factor curves.

What is the peak arc voltage at 600V operating voltage?

The peak arc voltage at 600V operating voltage is approximately 1.2 times the operating voltage.

What is the class rating for these fuses?

These fuses are rated aR-CLASS according to VDE 636-23 IEC 60269-4.

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.