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SITOR Extra-fast Fuses

SITOR Extra-fast Fuses are high-speed semiconductor protection fuses designed for the rigorous demands of power electronics and industrial automation. These fuses, often referred to as ultra-rapid fuses or semiconductor fuses, are engineered to provide superior current-limiting performance, protecting sensitive components like IGBTs, thyristors,...

SITOR Extra-fast Fuses are high-speed semiconductor protection fuses designed for the rigorous demands of power electronics and industrial automation. These fuses, often referred to as ultra-rapid fuses or semiconductor fuses, are engineered to provide superior current-limiting performance, protecting sensitive components like IGBTs, thyristors, and diodes from short-circuit faults. Key technical parameters include rated voltages typically ranging from 250V to 690V AC/DC, rated currents from a few amps up to several hundred amps, and extremely low I²t values for precise coordination. They feature a compact, blade-type or cylindrical body design with silver-plated contacts for low resistance and high reliability. The fuses are characterized by their ability to clear faults in under a millisecond, ensuring minimal thermal and mechanical stress on downstream equipment.

These fuses are predominantly used in variable frequency drives (VFDs), uninterruptible power supplies (UPS), DC power supplies, battery chargers, and welding equipment. They are also critical in renewable energy systems such as solar inverters and wind turbine converters, as well as in railway traction systems and electric vehicle charging stations. Their installation is common in control cabinets, power distribution panels, and industrial automation enclosures where space is at a premium and high fault currents are present.

The SITOR Extra-fast Fuses category includes subcategories such as blade-type fuses (e.g., SITOR 3NE1, 3NE2 series), cylindrical fuses (e.g., SITOR 3NC1, 3NC2 series), and high-voltage variants. Typical article codes follow a pattern like 3NE1 123-0A or 3NC2 456-0B, where the first digits indicate the series and physical size, and the suffix denotes rated current and voltage. For example, the 3NE1 series covers 10x38mm blade fuses with ratings from 1A to 100A at 690V, while the 3NC2 series includes 14x51mm cylindrical fuses for higher current applications up to 200A.

Partnering with Electric Automation Network ensures access to genuine SITOR fuses with real-time pricing and global express shipping. Our team of specialized engineers provides personalized technical support for fuse selection, coordination studies, and replacement strategies. We offer detailed technical documentation per article, including time-current curves and I²t data, to guarantee optimal protection for your semiconductor circuits. Whether you need a single fuse for a critical repair or bulk supply for a large-scale project, we deliver with speed and precision.

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Manufacturer Code Reference Catalog Number Description Delivery Price

8US1211-4TM00

8US1211-4TM00

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Busbar system Busbar center-to-center spacing 60 mm Device adapter, Width: 72 mm Bar thickness: 5.10 mm+TT profile for equipment with circuit breaker SIRIUS Size S3 (100 A) Length 182 mm Operating range 480-690 V

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4NC5431-0CH20

4NC5431-0CH20

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WINDOW-TYPE CURRENT TRANSFORMER, CLASS 1 1000A/1A, 10VA PRIMARY CURRENT 1000A, 10VA

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3NC2302-0MK

3NC2302-0MK

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SITOR cylindrical fuse link, 22x127 mm, 2 A, gS, Un AC: 1500 V, Un DC: 1000 V

PROTEC FUSE. SEMICOND. SITOR 22X127 2A GS 1500V AC/1000V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 5 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NE3635-0C

3NE3635-0C

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SITOR fuse link, with slotted blade contacts, NH3, In: 450 A, aR, Un AC: 1000 V, Un DC: 440 V, front indicator

SET OF FUSES SITOR FOR PROTECTION OF SEMICONDUCT. 450A AR 1000V SIZE 3 CONTACT METER CONNECTION 130MM ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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8US1941-2BA00

8US1941-2BA00

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Busbar system, accessories Busbar center-to-center spacing 40, 60 mm Connection terminal Bar thickness: 10 mm+TT profile for copper busbars and laminated copper bands on busbars 2x40x 10 mm also for longitudinal connections

Busbar adapter system, connection terminal for flat profiles and Cu tapes up to 2 x 40 x 10mm to busbars, with 10mm thickness, as well as to T and double T profiles also for longitudinal connections up to 30 x 10mm ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Multipurpose Order 3 Units ** )

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3NE1333-0

3NE1333-0

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SITOR fuse link, with blade contacts, NH2, In: 450 A, gS, Un AC: 690 V, Un DC: 440 V, front indicator

SITOR Service Class GR Fuse, DIN 43620 450A, AC 690V (GR. 2) ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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3NE1333-2

3NE1333-2

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SITOR fuse link, with blade contacts, NH2, In: 450 A, gR, Un AC: 690 V, Un DC: 440 V, front indicator

SET OF FUSES SITOR CLASS SERVICE GR, DIN 43620 450A, AC 690V (TAM. 2) ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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3NE1333-3

3NE1333-3

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SITOR fuse link, with slotted blade contacts, NH2, In: 450 A, gR, Un AC: 690 V, Un DC: 440 V, front indicator

SET OF FUSES SITOR FOR PROTECTION OF SEMICONDUCT. 450A GR 690V SIZE 2 CONTACT METER CONNECTION 110MM ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NC3338-6U

3NC3338-6U

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SITOR fuse link, with female thread on both sides, NH3, In: 800 A, aR, Un AC: 1000 V, Un DC: 440 V, front indicator

SITOR FUSE 800A AR 1000V MBC=6XIN ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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8US1922-2DA00

8US1922-2DA00

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Busbar system, accessories Busbar center-to-center spacing 60 mm Cover profile, TT busbar Length 1000 mm

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3NC2240

3NC2240

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SITOR cylindrical fuse link, 22x58 mm, 40 A, aR, Un AC: 690 V, Un DC: 700 V, DC according to UL

CART. CILIND FUSE. SITOR AR 40A, 660V AC/700V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 5 Units ** ). Cancelations and returns limited. Consult conditions.

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3NC2632-0MK

3NC2632-0MK

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SITOR fuse link, with Bolt-on links, In: 32 A, gR, Un AC: 690 V, Un DC: 440 V, without indicator

PROTEC FUSE. SEMICOND. SITOR 32A T. 690V AC/440V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NE8230-3MK

3NE8230-3MK

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SITOR fuse link, with slotted blade contacts, NH1, In: 315 A, aR, Un AC: 690 V, Un DC: 440 V, front indicator

PROTEC FUSE. SEMICOND. SITOR 315A AR 690V AC/440V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NE3232-0B

3NE3232-0B

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SITOR fuse link, with slotted blade contacts, NH1, In: 400 A, aR, Un AC: 1000 V, front indicator

Fuse SITOR 400A, AC 1000V, GR.1/110mm ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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8US1922-2EA00

8US1922-2EA00

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Spare panel support 32 mm for busbar system 60 mm suitable for spare panel cover

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3NC3340-1U

3NC3340-1U

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SITOR fuse link, with slotted blade contacts, NH3, In: 900 A, aR, Un AC: 1000 V, Un DC: 440 V, front indicator

SITOR FUSE 900A AR 1000V MBC=6XIN ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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4NC5122-0CE20

4NC5122-0CE20

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WINDOW-TYPE CURRENT TRANSFORMER, CLASS 1 200A/1A, 5VA PRIMARY CURRENT 200A, 5VA

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3NE1020-2

3NE1020-2

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SITOR fuse link, with blade contacts, NH00, In: 80 A, gR, Un AC: 690 V, Un DC: 250 V, front indicator

SET OF FUSES SITOR CLASS SERVICE GR, DIN 43620 80A, AC 690V (TAM. 00) ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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3NE8817-0MK

3NE8817-0MK

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SITOR fuse link, with blade contacts, NH000, In: 50 A, gR, Un AC: 690 V, Un DC: 440 V, front indicator

PROTEC FUSE. SEMICOND. SITOR 50A T. 690V AC/440V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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8US1011-4TM00

8US1011-4TM00

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Busbar system Busbar center-to-center spacing 40 mm Device adapter, Width: 72 mm Bar thickness: 5+10 mm for circuit breaker SIRIUS, S3 (100 A) Operating range 480-690 V Length 182 mm

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3NC3245-1U

3NC3245-1U

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SITOR fuse link, with slotted blade contacts, NH3, In: 1600 A, aR, Un AC: 500 V, Un DC: 440 V, front indicator

SITOR FUSE FOR PROTEC. SEMICONDUCTORS 1600A AR 500V A.C. MBC=4.5XIN SIZE 3 WITH BLADES CONT. SLOTS ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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3NE4332-3

3NE4332-3

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SITOR fuse link, with slotted blade contacts, NH2, In: 400 A, gR, Un AC: 750 V, front indicator

SITOR FUSE FOR PROTEC. SEMICONDUCTORS 400A T. 750V A.C. SIZE 2 WITH BLADES CONT. SLOTTED DIMENSION 110MM ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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8US1921-2BE00

8US1921-2BE00

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Busbar system, accessories Busbar center-to-center spacing 40, 60 mm Busbar connection piece Bar thickness: 5.10 mm Width: 20-30 mm Length 40 mm

BAR SYSTEM, SEPARAC ACCESSORY. CENTERS BARS 40,60 MM ELEMENT UNION BARS BAR THICKNESS: 5,10MM WIDTH: 20-30MM ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Multiplo of Order 6 Units ** )

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3NC1450-0MK

3NC1450-0MK

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SITOR cylindrical fuse link, 14x51 mm, 50 A, gR, Un AC: 690 V, Un DC: 250 V

PROTEC FUSE. SEMICOND. SITOR 14X51 50A T. 690V AC/250V DC ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 10 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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8US1061-5FK08

8US1061-5FK08

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Busbar system Busbar center-to-center spacing 40 mm Device adapter, Width: 55 mm Bar thickness: 5+10 mm for circuit breaker or contactor size S2 with 1 DIN rail 35 mm, up to 56 Length 139 mm

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3NE9440-6

3NE9440-6

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SITOR fuse link, with female thread on both sides, In: 850 A, gR, Un AC: 600 V, Un DC: 250 V, front indicator

SITOR 850A, AC 660V fuse ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NB2357-4KK16

3NB2357-4KK16

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SITOR fuse link, with slotted blade contacts, 2 x NH3L, In: 1600 A, aR, Un DC: 1250 V, front indicator

SITOR FUSE SIZE 3L 2X PARALLEL 1600A 1250V DC 1500V DC (VSI) CLASS AR BLADES CONT. SLOTTED. Cancelations and returns limited. Consult conditions.

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3NE1331-2

3NE1331-2

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SITOR fuse link, with blade contacts, NH2, In: 350 A, gR, Un AC: 690 V, Un DC: 250 V, front indicator

SET OF FUSES SITOR CLASS GR SERVICE, DIN 43620 350A, AC 690V (TAM. 2) ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Cancelations and returns limited. Consult conditions.

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3NE1331-3

3NE1331-3

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SITOR fuse link, with slotted blade contacts, NH2, In: 350 A, gR, Un AC: 690 V, Un DC: 250 V, front indicator

SET OF FUSES SITOR FOR PROTECTION OF SEMICONDUCT. 350A GR 690V SIZE 2 CONTACT METER CONNECTION 110MM ( ** ATTENTION : Price per 1 Unit and Minimum Quantity / Order Multiple 3 Units ** ). Manufactured to order. Non-Cancelable Non-Returnable.

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3NE1331-0

3NE1331-0

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SITOR fuse link, with blade contacts, NH2, In: 350 A, gS, Un AC: 690 V, Un DC: 250 V, front indicator

SITOR service class GR fuse, DIN 43620 350A, AC 690V (GR. 2) ( ** ATTENTION: Price per 1 Unit and Minimum Quantity/Order Multiple 3 Units ** ).

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