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0451.125MR The Littelfuse 0451.125MR is a very fast-acting surface mount fuse rated at 125mA and 125V with a breaking capacity of 50A in a compact Nano2 package.
Mfr Part #:

0451.125MR

Available from 2 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
The Littelfuse 0451.125MR is a very fast-acting surface mount fuse rated at 125mA and 125V with a breaking capacity of 50A in a compact Nano2 package.
Total Stock: 1,500 pcs

0451.125MR Available from 2 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
1,000 pcs
1000 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
500 pcs
500 pcs On Request 1 On Request On Request On Request On Request On Request

0451.125MR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Approval Agency
Breaking Capacity
Breaking Capacity @ Rated Voltage
Cold Resistance
Current Rating
Current Rating (Amps)
Fuse Type
Halogen Free
Height
Lead Style
Length
Melting I²t
Mounting Type
Operating Temperature
Operating Temperature Range
Package / Case
Response Time
SVHC Present
Size / Dimension
Tape & Reel
Voltage Rating
Width

0451.125MR Description

Short technical summary and product information.

The Littelfuse 0451.125MR is a Nano2 SMF (Surface Mount Fuse) designed for secondary side over-current protection in electronic circuits. It offers a very fast-acting (fast blow) response, making it suitable for protecting sensitive components.

 

The fuse is rated at 125 mA with a voltage rating of 125 V (AC/DC) and has a breaking capacity of 50A at the rated voltage. The cold resistance is 1.7000 Ohms, and the melting I²t is 0.00286 A²s. It operates over a temperature range of -55°C to 125°C.

 

This board mount fuse comes in a 2-SMD, square end block package with dimensions of 6.10mm x 2.69mm x 2.69mm and is designed for surface mount technology (SMT) assembly. It is RoHS compliant and Halogen Free, and carries CSA and UL approvals.

0451.125MR Quick Information

Product Type: SMD Fuse
Series: 451/453 Series
Canonical Name: Littelfuse 0451.125MR Nano2 SMD Very Fast-Acting Fuse, 125mA, 125V, 50A Breaking Capacity
Subcategory: Very Fast-Acting Board Mount Fuse

0451.125MR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): Level 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

0451.125MR Features

  • Very fast-acting response time.
  • Rated for 125mA at 125V.
  • 50A breaking capacity at rated voltage.
  • RoHS and Halogen Free compliant.
  • Surface mount Nano2 package.

0451.125MR Applications

  • Secondary side over-current protection.
  • Notebook and LCD PC power circuits.
  • Portable device battery charging circuits.
  • Server and telecom power supply protection.
  • Industrial equipment circuit protection.

0451.125MR FAQs

5 frequently asked questions generated from this part’s specifications.
What is the current rating of the 0451.125MR fuse?

The current rating is 125 mA.

What is the voltage rating for this Littelfuse fuse?

The voltage rating is 125 V.

What is the breaking capacity of the 0451.125MR?

The breaking capacity is 50A at the rated voltage.

Is the 0451.125MR a fast-acting or slow-blow fuse?

It is a very fast-acting (fast blow) fuse.

What package type does the 0451.125MR use?

It comes in a 2-SMD, square end block package for surface mount mounting.

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