Product Details

Description

The Siemens 5SB2 81 is a high-quality DIAZED fuse-link designed for reliable circuit protection. As part of the SENTRON portfolio, this fuse offers superior performance for general applications. It is rated for a current of 25A and a voltage of 500V AC, making it suitable for a wide range of industrial and commercial electrical systems. Its gG characteristic ensures protection against both overload and short-circuit conditions.

Specifications

• Manufacturer: Siemens
• Type Number: 5SB2 81
• System: DIAZED
• Size: DII
• Rated Current: 25 A
• Rated Voltage: 500 V AC
• Operating Class: gG (General purpose cable and line protection)
• Breaking Capacity: 50 kA

Label Info

• Brand: SIEMENS
• Model: 5SB2 81
• EAN: 4001869002392

Application

This fuse-link is ideal for use in distribution boards, control panels, and machine control circuits to protect against overcurrents. It is commonly used in building infrastructure and industrial plants to safeguard valuable equipment and ensure operational safety.

Country of Origin

Made in Slovenia.

CO2 Impact

By purchasing this reused component, you help avoid the production of a new one, saving approximately 1.0 kg of CO2. This saving is comparable to the emissions from driving a standard car for 5 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

The 'gG' characteristic indicates a general purpose fuse-link. It is designed for the protection of cables and lines against both overload and short-circuit currents, making it suitable for a wide range of standard applications.

No, a DII size fuse-link like the 5SB2 81 cannot be directly used in a larger DIII fuse base. Each DIAZED size (DI, DII, DIII) has specific physical dimensions to prevent incorrect installation. To use a DII fuse in a DIII base, a specific adapter piece, called a gauge piece or 'Passschraube', would be required.

The Siemens 5SB2 81 fuse-link has a rated breaking capacity of 50 kA at 500V AC. This means it can safely interrupt a short-circuit current of up to 50,000 Amperes without damage to the fuse holder or surrounding equipment.

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Last Update: Friday, March 13, 2026