MERSEN FUSE H 3609P BCKUP 537-56/20 E3609PIB-D1537/20

Why Choose the Mersen W209365 Limitor®-PD High Voltage Back-up Fuse?

The Mersen W209365 is a dependable Limitor®-PD high voltage DIN back-up fuse-link designed to protect medium voltage transformers against the damaging effects of short-circuit currents. Developed for use in high voltage switchgear, controlgear and electrical distribution systems, it provides reliable fault interruption in demanding industrial and utility installations.

As part of the established Mersen Limitor®-PD range, the W209365 is manufactured using pure silver fuse elements, silver-coated copper end caps and a durable ceramic body. This high quality construction provides consistent electrical performance, mechanical strength and a long operating life within medium voltage power systems.

Rated at 36 kV AC with a 20 A current rating, the W209365 has a standard DIN body measuring 56 mm in diameter and 537 mm in length. Its integrated 80 N striker supports operation with compatible switchgear mechanisms, making the fuse suitable for transformer protection in substations and industrial distribution networks.

Key Advantages

• Designed for reliable medium voltage transformer protection.
• 36 kV AC voltage rating for high voltage distribution systems.
• 20 A rated current for transformer primary protection.
• Back-up fuse performance in accordance with established international standards.
• Integrated 80 N striker for compatible switchgear operation.
• Pure silver fuse elements and ceramic construction for dependable service life.

Key Features

• Mersen Limitor®-PD back-up fuse-link.
• Catalogue number: 45DB360V20PD.
• Rated voltage: 36 kV AC.
• Rated current: 20 A.
• Fuse dimensions: 56 mm diameter × 537 mm length.
• Striker force: 80 N.
• High voltage DIN fuse format.
• Designed to protect transformers against short-circuit currents.

Reliable Protection for Medium Voltage Transformers

High voltage back-up fuse-links are designed to interrupt significant short-circuit currents before they can cause serious thermal or mechanical damage to transformers and associated switchgear. This helps improve installation safety, reduce equipment damage and minimise costly electrical downtime.

The Mersen Limitor®-PD range provides proven transformer protection for high voltage installations. Its robust materials, DIN-compatible construction and reliable striker mechanism make the W209365 suitable for new switchgear assemblies, transformer installations and maintenance replacement projects.

Typical Applications

• Medium voltage transformer primary protection.
• Industrial substations and distribution networks.
• High voltage switchgear and controlgear.
• Utility electrical infrastructure.
• Commercial and industrial power distribution.
• Transformer maintenance and replacement projects.