Littelfuse L25S030 L25S Series Semiconductor Fuse, 250V 30A

Littelfuse L25S030 L25S Series Semiconductor Fuse, 250V 30A

The Littelfuse L25S030 L25S Series Semiconductor Fuse delivers extremely fast-acting, current-limiting protection for silicon controlled rectifiers (SCRs), diodes, thyristors, triacs, transistors, and similar solid-state devices used in variable speed drives, power rectifiers, UPS systems, DC power supplies, and a wide range of electronic equipment. Rated 250VAC / 250VDC at 30A with a Very Fast-Acting (FF) opening characteristic, this fuse offers 200,000 A.I.R. and an interrupting rating of 20000A@250VDC, meeting present and future system requirements wherever extremely fast-acting, current-limiting fuses with no time delay are required. It is UL Recognized under the components program of Underwriters Laboratories, Inc., permitting use for supplementary protection in UL Listed equipment.

Key Features

• Ampere Rating: 30A rating sized for supplementary protection of semiconductor devices.
• Voltage Rating: 250VAC / 250VDC for flexible AC and DC circuit protection.
• Opening Characteristic: Very Fast-Acting (FF) with no time delay, ideal for SCRs, diodes, thyristors, triacs, and transistors.
• Interrupting Rating: 200,000 A.I.R. (20000A@250VDC) for reliable interruption of overcurrents up to system limits.
• Extremely Current Limiting: Low I2t and peak let-through currents help meet demanding semiconductor protection requirements.
• Listing: UL Recognized component suitable for supplementary protection in UL Listed equipment.

Certifications & Compliance

• UL Recognized Component (Underwriters Laboratories)
• CSA Certified (1422-30-029862)
• CE Compliant

Technical Specifications

• VAC (V): 250
• VDC (V): 250
• Ampere Rating (A): 30
• Opening: Very Fast-Acting (FF)
• Interrupting Rating: 20000A@250VDC

Typical Applications

• Variable Speed Drives
• Power Rectifiers
• UPS Systems
• DC Power Supplies
• Supplementary Protection for SCRs, Diodes, Thyristors, Triacs, and Transistors
• Electronic and Solid-State Power Equipment

Why Littelfuse?

Littelfuse engineers semiconductor fuses using advanced metallurgical, polymer, and materials research combined with mathematical modeling and computerized statistical analysis to deliver accuracy, consistent quality, reliability, and predictable performance. The L25S030 is UL Recognized for supplementary protection in UL Listed equipment, giving specifiers confidence in code-compliant performance for demanding solid-state power applications such as variable speed drives, power rectifiers, and UPS systems.