Siemens Sitor cylindrical fuse link, 40A, 700VDC, 14 x 51mm Part number 3NC1440

Product Overview

The Siemens SITOR cylindrical fuse link, article number 3NC1440, is a semiconductor protection fuse designed for use in power distribution and low-voltage switchgear applications. It features a cylindrical 14 × 51 mm form factor with an operational class of aR and a rated current of 40 A, providing reliable overcurrent protection for industrial electrical systems operating at rated voltages up to 690 V AC and 700 V DC.

Key Features

• SITOR cylindrical fuse link for semiconductor protection
• 14 × 51 mm physical size
• Rated current 40 A
• Operational class aR for full-range semiconductor protection
• High breaking capacity for industrial applications
• Designed for use in low-voltage switchgear and distribution
• Robust construction for reliable performance

Technical Specifications

• Article Number: 3NC1440
• Product Type: SITOR cylindrical fuse link
• Rated Current: 40 A
• Operational Class: aR
• Dimensions: 14 mm × 51 mm
• Rated Voltage (AC): Up to 690 V
• Rated Voltage (DC): Up to 700 V
• Application Category: Semiconductor protection
• Mounting Form: Fuse base or switchgear housing

Compliance & Standards

• Part of Siemens SITOR fuse system family
• Designed to meet industrial electrical protection standards
• Manufactured to Siemens quality and safety specifications
• Suitable for use in low-voltage switchgear and power distribution

Applications

The Siemens 3NC1440 SITOR cylindrical fuse link is used for protecting semiconductor devices and power circuits in industrial power distribution systems. It is commonly installed in low-voltage switchgear, control panels, converters, motor drives, and other electrical installations where semiconductor overcurrent protection is required to prevent damage to sensitive components and ensure operational reliability.