MERSEN FUSE A 070 URD 31 TTI 0550 A070URD31TTI0550

Why Choose the Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 550A With Striker Flush Ends UNC Threads A070UD31TTI550?

Engineered for demanding industrial power protection, the Protistor® Size 31 high-speed fuse ensures reliable equipment safety with rapid fault interruption up to 550A. Certified to IEC 690VAC and UL 700VAC standards, it supports a wide range of critical and high-energy applications.

The robust square body design, integrated striker and flush ends with UNC threads simplify installation and enhance operational safety and system integration. Trust in proven arc-quenching and performance consistency, minimising costly downtime in sensitive environments.

Product Code: H300479

Key Benefits

• High-speed interruption for sensitive semiconductor protection
• Certified to IEC 690VAC and UL 700VAC for versatile global use
• Robust ceramic body ensures durability and heat resistance
• Integrated striker indication system for clear fault signalling
• Flush ends with UNC threads facilitate secure and easy mounting
• Silver-plated brass terminals provide excellent conductivity and corrosion resistance
• High breaking capacity of 200 kA for reliable fault clearing

Compatibility

This fuse is compatible with industrial motor drives, semiconductor devices, and power electronic circuits requiring fast and reliable overcurrent protection. It fits standard Size 31 fuse holders with bolted mounting and is suitable for systems operating up to 700 V AC.

Applications

• Protection of power semiconductors and inverters
• Industrial motor control and drives
• Power distribution panels and switchgear
• Renewable energy systems such as solar inverters
• High-speed fault clearing in sensitive electronic equipment

Technical Specifications

• Item number: H300479
• Catalogue No: A070UD31TTI550
• Description: Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 550A With Striker Flush ends UNC threads
• EAN/UPC Code: 3605340329087
• Rated voltage AC UL: 700 V
• Rated voltage AC IEC: 690 V
• Ampere Rating: 550 A
• RoHS Compliant: Yes
• AC or DC: AC
• Speed/Characteristic: aR
• Fuse Size: 31
• Mounting: Bolted
• Clearing I2t At Rated Voltage: 310000 A²s
• Melting I2t: 52000 A²s
• AC Max I.R./Breaking Capacity: I1: 200 kA
• Indication System: Yes
• Indication System Type: Striker
• Connection/Terminal Material: Silver-Plated Brass
• Connection/Terminal Type: Flush ends
• Product Width: 51 mm
• Product Length: 50.6 mm
• Product Height: 56.5 mm
• Sell Pack Quantity: 3 EA
• Sell Pack Weight: 1.155 kg
• Sell Pack Width: 85 mm
• Sell Pack Length: 168 mm
• Sell Pack Height: 65 mm
• Product group: Semiconductor Protection Fuses
• Body/Insulating Material: Ceramic
• Product Weight: 0.385 kg
• Power Dissipation at Rated Current Value: 70 W

Common Search Terms

High-speed fuse, Protistor fuse, Size 31 fuse, 550A fuse, semiconductor protection fuse, aR fuse, 690VAC fuse, UL rated fuse, industrial power fuse, striker fuse, ceramic body fuse