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Mersen D1000273 - High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 12kVAC IEC 125A d88mm, L292mm With Thermal Striker 80N

Mersen D1000273 High Voltage DIN Back-up fuse for Transformer Limitor® VDE T402 12kVAC IEC 125A d88mm…

Alternate Item Number: 45DB120V125PTD


Documents & Media
Specification Sheet

Contact for Pricing

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

Overview

The Mersen D1000273 Limitor® VDE T402 high-voltage DIN back-up fuse is a critical component for transformer protection in high-voltage switchgear and controlgear systems. Designed to IEC 60282-1 and VDE 0670 T402 standards, this fuse provides reliable safeguarding against severe thermal and dynamic stresses from short-circuit currents. With a voltage rating of 12kVAC and a current rating of 125A, it is engineered for high breaking capacity and low power losses, ensuring energy efficiency in demanding applications. Key features include a high-speed switching mechanism, low inductance module structure, and a thermal striker rated at 80N for additional protection against overheating. The fuse body is constructed from durable ceramic, with fuse elements made of pure silver and caps of silver-coated copper for superior conductivity and longevity. Physical dimensions are 88mm diameter and 292mm length, optimized for integration with HV switchgear. This fuse is specifically designed for transformer protection, supporting repeated peak currents during motor starting and short-circuit events. It is suitable for indoor use and is compatible with air or gas-insulated switchgear, as recommended by leading manufacturers like Siemens and Ormazabal. The D1000273 is part of Mersen’s trusted Limitor® series, which has been a trusted choice for critical infrastructure protection for decades.
  • Voltage rating: 12kVAC, current rating: 125A
  • Physical dimensions: 88mm diameter x 292mm length
  • Thermal striker rated at 80N for overheating protection
  • High breaking capacity and low power losses for energy efficiency
  • Designed for transformer protection in HV switchgear and controlgear systems

Specifications

AC Voltage Rating
12 kV
Amperage Rating
125 A
Application
HV Transformer protection
Body Material
Ceramic
Brand Name
Mersen
Connection
Cylindrical
Connection Material
Silver-Plated Copper
Interrupt Rating
63 kA
Mounting
Clip
Size
14.09 x 3.46 in
Size
358 x 88 mm
Special Features
High breaking capacity High current limitation Low switching voltage Medium striker 80N/30mm CPD striker: controlled power dissipation Indoor and outdoor applications Quick breaking Non-ageing Energy efficiency New cap design for a better compatibility with all types of clips and easier assembly Coordination with IEC 60787, IEC 62271-105, IEC/TR 62655 and VDE 0670 T303
Standard
IEC 60282-1 VDE 0670 part 4 VDE 0670 part 402 DIN 43625
Sub Brand
Limitor®
Type
DIN HV Back-up Fuses for Transformers
Type Of Indicators
Striker
Package Dimensions (L x W x H)
14.09 in x 3.46 in x 3.46 in
Package Dimensions (L x W x H)
358 mm x 88 mm x 88 mm
Package Weight (Imperial)
8.378 lb
Package Weight (Metric)
3.800 kg
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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 standards do the Limitor®-PTD HV fuse-links comply with?

The Limitor®-PTD HV fuse-links comply with IEC 60282-1, VDE 0670 part 4, VDE 0670 part 402, and DIN 43625.

What are the primary applications for these HV fuse-links?

These fuse-links are dedicated to protecting transformers in combination with air or gas insulated switchgear against short-circuit currents.

What materials are used in the construction of Limitor®-PTD HV fuse-links?

Fuse-elements are made of pure silver, caps are copper coated with silver, and bodies are ceramic.

What is the rated voltage range for the Limitor®-PTD fuses?

The rated voltage ranges are 6/12kV, 10/24kV, and 20/36kV, depending on the specific model.

What is the length of the 6/12kV Limitor®-PTD fuse-links?

The 6/12kV Limitor®-PTD fuse-links have a length of 292mm.

What is the length of the 10/24kV Limitor®-PTD fuse-links?

The 10/24kV Limitor®-PTD fuse-links have a length of 442mm.

What is the length of the 20/36kV Limitor®-PTD fuse-links?

The 20/36kV Limitor®-PTD fuse-links have a length of 537mm.

What is the rated current range for the 6/12kV fuse-links?

The rated current range for the 6/12kV fuse-links is 10 A to 160 A.

What is the rated current range for the 10/24kV fuse-links?

The rated current range for the 10/24kV fuse-links is 6.3 A to 100 A.

What is the rated current range for the 20/36kV fuse-links?

The rated current range for the 20/36kV fuse-links is 6.3 A to 50 A.

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.