Siemens 5SB251 Diazed Fuse 1 Pack

Product Description

The SIEMENS 5SB251 is a DIAZED-style fuse designed for overcurrent protection in low-voltage electrical distribution systems. DIAZED fuses are a standardized European-origin cartridge fuse format widely used in industrial control panels, switchgear, and power distribution equipment. This fuse provides reliable short-circuit and overload protection where a compact, size-specific fusible element is required. It is installed by licensed electricians and industrial maintenance technicians working on low-voltage distribution panels and control circuits. The package contains one fuse per pack.

The 5SB251 is suited for use in industrial and commercial electrical systems that specify DIAZED-format fuse holders. Typical installations include motor control centers, distribution boards, and industrial control panels where standardized fuse sizing and form factor are critical to maintaining system protection coordination. This fuse format is common in facilities with European-specification equipment or legacy switchgear that requires DIAZED-compatible components.

Key Features

• DIAZED cartridge fuse format for standardized overcurrent protection
• Compact form factor fits DIAZED-compatible fuse holders and bases
• Single fuse per pack for precise quantity control on service calls
• Lightweight at 0.060 pounds for easy handling and transport

Compatibility

Designed as an OEM-style replacement for DIAZED-format fuse holders used in low-voltage industrial and commercial electrical distribution panels.

Installation Notes

Installation should be performed by a qualified licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit using proper LOTO procedures before removing or installing any fuse. Verify that the replacement fuse matches the required current rating, voltage rating, and DIAZED size designation of the existing fuse before installation. Do not install a fuse with a higher current rating than the circuit is designed to carry.

Technical Specifications

• Fuse Type: DIAZED
• Package Quantity: 1 per pack
• Length: 4.370 inches
• Width: 0.984 inches
• Height: 2.008 inches
• Weight: 0.060 pounds
• UPC: 75455421449

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 5SB251