Littelfuse 25103.5L - VERY FAST-ACTING PICO II LEADS 3.5A. The PICO® II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating.
Littelfuse

25103.5L

Alternate Item Number: 025103.5VXL

UPC: 079458126723

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Overview

The Littelfuse PICO II 3.5A Very Fast-Acting Subminiature Fuse (SKU 25103.5L) delivers ultra-precise overcurrent protection in a compact subminiature package. Designed for applications requiring rapid fault interruption, this fuse ensures minimal damage to sensitive electronic components by responding to overcurrent conditions in milliseconds. With a current rating of 3.5A, it supports a wide operating range from 62mA to 15A, making it ideal for diverse electronic systems including power supplies, telecommunications equipment, automotive electronics, and medical devices. Key specifications include a very fast-acting response time, subminiature size (occupying minimal PCB space), and axial leads for easy soldering. The fuse is RoHS compliant and available in halogen-free options to meet stringent environmental standards. Its wide operating temperature range (-55°C to 125°C) and low temperature rerating capability ensure reliable performance across varied environmental conditions. Engineered for high-density circuit board layouts, the PICO II series is trusted by engineers for applications where space constraints and precision protection are critical. The 3.5A rating provides a balance between sensitivity and robustness, making it suitable for both low-power and moderate-load applications. Whether protecting delicate sensors, microcontrollers, or power conversion circuits, this fuse offers consistent and dependable performance. Littelfuse, a global leader in circuit protection, manufactures this fuse in the US, ensuring adherence to rigorous quality standards. The PICO II series exemplifies Littelfuse’s commitment to innovation and reliability in safeguarding electronic systems worldwide.
  • Very fast-acting response time for rapid fault interruption
  • Subminiature design with axial leads for minimal PCB space
  • Wide current rating range: 62mA to 15A
  • RoHS compliant with halogen-free options available
  • Operating temperature range: -55°C to 125°C

Specifications

Amperage Rating
3.5 Amps
Application
electronic equipment & appliances
Brand Name
Littelfuse
Connection Type
Axial Leads
Connection Type
Axial Lead
Current Rating
3.5 A
Series
PICO II
Size
Subminiature
Special Features
Wide operating temperature range
Standard
CSA Approval
Sub Brand
251 Series PICO II
Type
Small Size
250V PICO FUSE 3.5A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

26303.5L

250V PICO FUSE 3.5A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
250V PICO FUSE 3A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

263003L

250V PICO FUSE 3A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
FUSE 125V FM02A MIL MICRO FUSE 4A. Developed originally for the U.S. Space Program, MICRO™ fuse provides reliability in a compact design. The MICRO™ fuse is available in plug–in or radial lead styles and a complete range of ampere ratings from 0.002A to 5A to suit a wide variety of design needs. Features: Military grade available. High breaking capacity. Clear cover option to view fuse element status. Available from very low ampere of 0.002A to 5A. Plug-in with short or long leads option. Applications: Printed circuit boards and similar equipment. Electronic components.

274004

FUSE 125V FM02A MIL MICRO FUSE 4A. Developed originally for the U.S. Space Program, MICRO™ fuse provides reliability in a compact design. The MICRO™ fuse is available in plug–in or radial lead styles and a complete range of ampere ratings from 0.002A to 5A to suit a wide variety of design needs. Features: Military grade available. High breaking capacity. Clear cover option to view fuse element status. Available from very low ampere of 0.002A to 5A. Plug-in with short or long leads option. Applications: Printed circuit boards and similar equipment. Electronic components.
VERY FAST-ACTING PICO II LEADS 3A. The PICO® II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating.

251003L

VERY FAST-ACTING PICO II LEADS 3A. The PICO® II Very Fast-Acting Fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating.
SLO-BLO GLASS AXIAL V-PACK 4A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.

0313004.VXIDP

SLO-BLO GLASS AXIAL V-PACK 4A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.
250V PICO FUSE 4A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

263004L

250V PICO FUSE 4A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
250V PICO FUSE BULK M-PACK 3A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

0263003.MXL

250V PICO FUSE BULK M-PACK 3A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
250V PICO FUSE BULK M-PACK 4A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

0263004.MXL

250V PICO FUSE BULK M-PACK 4A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
SLO-BLO GLASS AXIAL V-PACK 5A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.

0313005.VXIDP

SLO-BLO GLASS AXIAL V-PACK 5A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.
250V PICO FUSE 2A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

263002L

250V PICO FUSE 2A. The PICO® II 263 Series Fuse is a specially designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
250V PICO FUSE BULK M-PACK 2A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.

0263002.MXL

250V PICO FUSE BULK M-PACK 2A. The PICO® II 263 Series Fuse is a specifically designed axial leaded fuse that achieves a 250V rating in a small package. Features: Very fast-acting. Small size. Wide current rating range (62mA- 15A). RoHS compliant. Halogen-free available. Wide operating temperature range. Low temperature rerating. 250V rating.
FUSE 125V FM02A MIL MICRO FUSE 2A. Developed originally for the U.S. Space Program, MICRO™ fuse provides reliability in a compact design. The MICRO™ fuse is available in plug–in or radial lead styles and a complete range of ampere ratings from 0.002A to 5A to suit a wide variety of design needs. Features: Military grade available. High breaking capacity. Clear cover option to view fuse element status. Available from very low ampere of 0.002A to 5A. Plug-in with short or long leads option. Applications: Printed circuit boards and similar equipment. Electronic components.

274002

FUSE 125V FM02A MIL MICRO FUSE 2A. Developed originally for the U.S. Space Program, MICRO™ fuse provides reliability in a compact design. The MICRO™ fuse is available in plug–in or radial lead styles and a complete range of ampere ratings from 0.002A to 5A to suit a wide variety of design needs. Features: Military grade available. High breaking capacity. Clear cover option to view fuse element status. Available from very low ampere of 0.002A to 5A. Plug-in with short or long leads option. Applications: Printed circuit boards and similar equipment. Electronic components.

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.