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LITTELFUSE

Littelfuse is a manufacturer of circuit protection components, with a product portfolio that includes fuses, fuse holders, fuse blocks, and related accessories. The company was founded in 1927 and has since expanded its offerings to serve industrial, commercial, and electronic markets. Littelfuse products are used in a wide range of applications, from semiconductor protection to branch circuit protection. 3G Electric supplies Littelfuse fuses and fuse accessories to industrial buyers worldwide. The product line includes very-fast-acting square body fuses, time-delay cylindrical fuses, Class G, Class L, Class RK5 fuses, and axial-lead fuses. These products are designed to meet various standards, including UL, CSA, CE, and RoHS. Littelfuse fuses are available in a variety of voltage and current ratings, with options for AC and DC applications. The PSR series, for example, offers very-fast-acting protection for power semiconductors, with ratings up to 1.6 kA and 650 V AC / 500 V DC. The CCMR series provides time-delay performance for branch circuits, with dual-element design. The SLC series is a Class G fuse rated 6 A at 600 V AC. The KLPC series is a Class L bolt-on fuse rated 3 kA at 600 V AC and 480 V DC. The FLSR series is a Class RK5 fuse rated 250 mA at 600 V AC and 300 V DC. The 473 series is a miniature axial-lead fuse with time-delay characteristics. These fuses are used in industrial equipment such as drives, rectifiers, power supplies, and control circuits. 3G Electric supports the Littelfuse line by stocking a range of these products and providing technical specifications to help buyers select the appropriate fuse for their application. Our team can assist with cross-referencing, availability, and order fulfillment. We ship globally, serving plant engineers, maintenance managers, and procurement specialists who require reliable circuit protection components. Littelfuse products are known for their consistent performance and adherence to industry standards. By offering Littelfuse fuses, 3G Electric aims to meet the needs of industrial facilities seeking quality circuit protection solutions. Whether you need semiconductor fuses for drive protection or time-delay fuses for branch circuits, 3G Electric can supply the Littelfuse products you require. Contact us for a quote or to discuss your specific requirements.

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About LITTELFUSE

Littelfuse is a manufacturer of circuit protection components, with a product portfolio that includes fuses, fuse holders, fuse blocks, and related accessories. The company was founded in 1927 and has since expanded its offerings to serve industrial, commercial, and electronic markets. Littelfuse products are used in a wide range of applications, from semiconductor protection to branch circuit protection. 3G Electric supplies Littelfuse fuses and fuse accessories to industrial buyers worldwide. The product line includes very-fast-acting square body fuses, time-delay cylindrical fuses, Class G, Class L, Class RK5 fuses, and axial-lead fuses. These products are designed to meet various standards, including UL, CSA, CE, and RoHS. Littelfuse fuses are available in a variety of voltage and current ratings, with options for AC and DC applications. The PSR series, for example, offers very-fast-acting protection for power semiconductors, with ratings up to 1.6 kA and 650 V AC / 500 V DC. The CCMR series provides time-delay performance for branch circuits, with dual-element design. The SLC series is a Class G fuse rated 6 A at 600 V AC. The KLPC series is a Class L bolt-on fuse rated 3 kA at 600 V AC and 480 V DC. The FLSR series is a Class RK5 fuse rated 250 mA at 600 V AC and 300 V DC. The 473 series is a miniature axial-lead fuse with time-delay characteristics. These fuses are used in industrial equipment such as drives, rectifiers, power supplies, and control circuits. 3G Electric supports the Littelfuse line by stocking a range of these products and providing technical specifications to help buyers select the appropriate fuse for their application. Our team can assist with cross-referencing, availability, and order fulfillment. We ship globally, serving plant engineers, maintenance managers, and procurement specialists who require reliable circuit protection components. Littelfuse products are known for their consistent performance and adherence to industry standards. By offering Littelfuse fuses, 3G Electric aims to meet the needs of industrial facilities seeking quality circuit protection solutions. Whether you need semiconductor fuses for drive protection or time-delay fuses for branch circuits, 3G Electric can supply the Littelfuse products you require. Contact us for a quote or to discuss your specific requirements.

Common Applications

  • Industrial drives — Littelfuse PSR series semiconductor fuses for overcurrent protection of variable-frequency drives and DC bus circuits.
  • Branch circuit protection — Littelfuse CCMR series time-delay fuses in control panels and distribution boards.
  • Compact equipment — Littelfuse SLC series Class G fuses in rejection-style holders for space-constrained branch circuits.
  • Main service entrance — Littelfuse KLPC series Class L bolt-on fuses for high-current industrial power distribution.
  • Motor circuits — Littelfuse FLSR series Class RK5 time-delay fuses for motor branch circuits and transformers.
  • Power supplies — Littelfuse 473 series axial-lead time-delay fuses for solder-in protection in power supplies and instrumentation.

Frequently asked questions

Common questions about LITTELFUSE from 3G Electric.

What is the voltage and current rating of the Littelfuse PSR series semiconductor fuse?

The Littelfuse PSR series includes very-fast-acting square body fuses with ratings such as 1.6 kA at 650 V AC and 500 V DC, and 160 A at 1,300 V AC and 1,000 V DC. These fuses are designed for overcurrent protection of power semiconductors in applications like variable-frequency drives and rectifiers. They are available in threaded flush-end configurations and carry certifications including UL Recognized, CE, and RoHS compliance. The PSR series is suitable for DC bus circuits and other power electronics where fast response to overcurrent events is required.

What are the key features of Littelfuse CCMR series fuses?

The Littelfuse CCMR series is a line of time-delay cylindrical fuses with dual-element construction. They are rated 600 V AC and available in current ratings such as 200 mA and 300 mA. These fuses are non-indicating and measure 13/32 inch by 1-1/2 inches. They are designed for branch circuit protection and are compatible with LFPSC fuse blocks. The dual-element design allows the fuse to withstand temporary inrush currents without opening, while still providing reliable overcurrent protection. CCMR fuses are commonly used in industrial control panels and distribution circuits.

What is the difference between Class G and Class L Littelfuse fuses?

Class G and Class L are distinct fuse classes with different physical sizes and interrupting ratings. Littelfuse Class G fuses, such as the SLC series, are compact cylindrical fuses rated up to 600 V AC and available in currents like 6 A. They are time-delay and non-indicating, suitable for branch circuits with limited space. Class L fuses, like the KLPC series, are larger bolt-on fuses with higher current ratings, such as 3 kA at 600 V AC and 480 V DC. They are used in main service entrances and large distribution panels where high fault currents are possible. Both classes are time-delay and provide overcurrent protection.

Are Littelfuse fuses RoHS compliant?

Many Littelfuse fuse series are RoHS compliant, meaning they meet the Restriction of Hazardous Substances directive. For example, the PSR series and SLC series are listed as RoHS compliant. However, compliance can vary by specific part number and series. It is important to check the individual product datasheet or specification to confirm RoHS status. 3G Electric can provide documentation for the Littelfuse products we supply to help verify compliance with environmental regulations.

What applications are suitable for Littelfuse FLSR series fuses?

Littelfuse FLSR series fuses are Class RK5 time-delay fuses rated 600 V AC and 300 V DC, with current ratings such as 250 mA. They are non-indicating and provide overcurrent protection for circuits with inductive loads, such as motors and transformers. The time-delay characteristic allows them to ride through temporary inrush currents without nuisance opening. Typical applications include industrial control panels, branch circuits, and equipment where motor starting currents are present. FLSR fuses are UL Listed and CSA Certified, and they are available in a range of ampere ratings to suit different circuit requirements.

Does 3G Electric supply LITTELFUSE products?

Yes — 3G Electric (S) Pte. Ltd. supplies LITTELFUSE products. We stock the LITTELFUSE catalog and supply genuine factory-original products with full manufacturer warranty and technical support.