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Ⅰ.Overview of product

0451001.MRL is a surface-mount fast-blow fuse launched by Littelfuse, belonging to the NANO²® 451 series. It is a compact board-mount circuit protection component designed for low-voltage electronic circuit overcurrent protection scenarios.

Ⅱ.Core parameter

Category:Circuit Protection,Fuses

Voltage Rating - DC:125 V

Mfr:Littelfuse Inc.

Response Time:Fast Blow

Series:NANO²® 451

Package / Case:2-SMD, Square End Block

Packaging:Tape & Reel

Breaking Capacity @ Rated Voltage:50A

Part Status:Active

Melting I²t:0.459

Mounting Type:Surface Mount

Approval Agency:CSA, PSE, UL

Fuse Type:Board Mount (Cartridge Style Excluded)

Operating Temperature:-55°C ~ 125°C

Current Rating (Amps):1 A

Size / Dimension:0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm)

Voltage Rating - AC:125 V

DC Cold Resistance:0.153 Ohms

Ⅲ.Main characteristics

Fast Response:This fuse adopts a fast blow response mechanism. It can quickly cut off the circuit when overcurrent occurs to avoid component damage.
Compact Size:It features a miniature SMD square block structure with ultra-small overall dimensions. It saves valuable PCB layout space for compact electronic products.
Stable Voltage:It supports 125V AC and DC dual voltage rating. It is adaptable to most low-voltage electronic circuit working environments.
High Breaking:It has a 50A high breaking capacity at rated voltage. It can withstand sudden large current impact and ensure circuit safety.
Multi-certified:The product has obtained CSA, PSE and UL authoritative certifications. It meets global mainstream electrical safety standards.
SMT Adaptable:It adopts surface mount mounting and tape & reel packaging. It is fully compatible with automated industrial assembly and mass production.

Ⅳ.Application field

Tablet Circuits:It is used for overcurrent protection of tablet computer internal power supply sub-circuits. It protects core boards from burnout caused by instantaneous current surge.
Smart Watch:It serves the battery power supply circuit of smart wearable watches. It ensures safe power supply and avoids short-circuit damage of wearable devices.
Portable Charger:It applies to internal voltage stabilization and power supply circuits of mobile power banks. It provides reliable overcurrent protection for charging and discharging loops.
Vehicle Recorder:It protects the power input circuit of car driving recorders. It adapts to complex vehicle power supply environments and prevents circuit failure.
Bluetooth Module:It is used for overcurrent protection of wireless Bluetooth communication modules. It guarantee stable operation of small signal transmission equipment.
Industrial Sensor:It protects low-voltage power supply circuits of miniature industrial sensors. It adapts to high and low temperature industrial working conditions.

Ⅴ.Summary

0451001.MRL is a high-performance miniature SMD fast-blow fuse with reliable overcurrent protection capability and wide environmental adaptability. It is an ideal safety protection component for miniaturized, low-voltage portable and industrial electronic equipment.