Mersen D-Sicherungseinsatz D II 20A blau DIIGG50V20

In industrial control panels and distribution boards, a reliable fuse is the last line of defense against overloads and short circuits. The Mersen D-Fuse Link DII 20A 500V AC gG Blue is a screw-in Diazed fuse designed to protect cables and conductors in low-voltage networks. With a rated current of 20 A and a breaking capacity of 50 kA, it safely interrupts fault currents while the blue visual indicator shows its status at a glance.

Key specifications

• Fuse type: D-Fuse (Diazed), size DII (E27)
• Rated current: 20 A
• Rated voltage: 500 V AC
• Breaking capacity: 50 kA
• Fuse class: gG (general purpose, full-range breaking capacity)
• Indicator: visual, blue
• Standard: IEC 60269-3-1
• Body material: ceramic
• Contact material: silver-plated copper
• Power dissipation: 2.5 W at rated current
• Operating temperature: -5°C to +40°C
• Frequency: 50/60 Hz
• Number of poles: 1

Why choose it

The Mersen D-Fuse Link combines proven Diazed technology with robust ceramic construction and silver-plated contacts for low contact resistance and long service life. Its blue indicator provides immediate visual confirmation of a blown fuse, reducing downtime during troubleshooting. Compliant with IEC 60269-3-1, it ensures safe and reliable protection for cables and conductors in a wide range of industrial and commercial installations.

Ideal use cases

• Protection of cables and conductors in low-voltage distribution systems
• Industrial control panels and switchgear
• Building installations with Diazed fuse bases
• Backup protection for motors and transformers

Good to know

This fuse is designed for screw-in mounting in standard DII (E27) fuse bases. Always replace a blown fuse with one of the same type and rating to maintain protection coordination. The ambient operating temperature range is -5°C to +40°C, making it suitable for most indoor applications.