# 0451005.MR (Component) ## Description 5A 125V 125V Fuse Board Mount (Cartridge Style Excluded) Surface Mount 2-SMD, Square End Block The 0451005.MR is a surface-mount (SMD) board-level fuse from Littelfuse, part of the NANO²® 451 series, designed to provide overcurrent protection in compact electronic circuits. It is a fast-acting fuse used to protect sensitive components from damage caused by short circuits or overload conditions, especially in high-density PCB designs. Key Features Type: Surface-mount chip fuse Designed for PCB mounting (2-SMD package) Current Rating 5 A nominal current Voltage Rating 125 V AC / 125 V DC Fast-Acting Response Quickly interrupts fault currents to protect circuitry Compact Size Approx. 6.10 mm × 2.69 mm × 2.69 mm Ideal for space-constrained PCB designs High Breaking Capacity Around 50 A interrupt rating Wide Operating Temperature -55°C to +125°C Construction Ceramic body for high thermal and mechanical stability Mounting Type Surface mount (SMD), suitable for automated PCB assembly Agency Approvals UL, CSA, PSE certified (varies by variant) ## Component Details - **Owner:** adrian95 - **Created:** 4/29/2026 - **Last Updated:** 4/29/2026 - **Visibility:** Public - **Part Type:** Fuse - **License:** https://creativecommons.org/licenses/by/4.0/ - **Manufacturer Part Number:** 0451005.MR - **Manufacturer Name:** Littelfuse Inc. - **Datasheet URL:** https://www.littelfuse.com/assetdocs/littelfuse-fuse-451-453-datasheet?assetguid=533cd5cc-956c-4243-867f-6ab5a62f6ba1 - **Current Rating:** 5A - **Used in:** 10 projects ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [LCSC](https://www.lcsc.com/product-detail/C19377093.html) | $3.0314 | 0 | | [Mouser](https://www.mouser.com/ProductDetail/Littelfuse/0451005.MR?qs=OJFHm2hVE4Eb0%2FcLZDnJag%3D%3D) | N/A | N/A | - **Part Type:** Circuit Protection Devices - **Manufacturer:** Littelfuse - **MPN:** 0451005.MR - **Mount Type:** Surface Mount - **Package / Case Code:** KEY-SMD - **Pin Count:** 2 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | P1 | | | 2 | P2 | | --- *Generated from [https://www.flux.ai/adrian95/0451005pmr~rk6](https://www.flux.ai/adrian95/0451005pmr~rk6)*