View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsCircuit ProtectionFuses0451004.MRSN
0451004.MRSN Image
Image may be representation.
See specifications for product details.
EXPRESS OPTION
Payment method

0451004.MRSN - Littelfuse Inc.

Manufacturer Part Number
0451004.MRSN
Manufacturer
Littelfuse
Allelco Part Number
32D-0451004.MRSN
ECAD Model
Parts Description
FUSE BOARD MOUNT 4A 125VAC 2SMD
Package
2-SMD, Square End Block
Data sheet
Cylindrical Battery Holders.pdf
Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
Our certification
In stock: 50980

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity
EXPRESS OPTION
Payment method
Our certification

Specifications

0451004.MRSN Tech Specifications
Littelfuse Inc. - 0451004.MRSN technical specifications, attributes, parameters and parts with similar specifications to Littelfuse Inc. - 0451004.MRSN

Product Attribute Attribute Value  
Manufacturer Littelfuse  
Voltage Rating - AC 125 V  
Size / Dimension 0.240' L x 0.106' W x 0.106' H (6.10mm x 2.69mm x 2.69mm)  
Series NANO²® 451  
Response Time Fast Blow  
Package / Case 2-SMD, Square End Block  
Package Tape & Reel (TR)  
Operating Temperature -55°C ~ 125°C  
Product Attribute Attribute Value  
Mounting Type Surface Mount  
Melting I²t 3.152  
Fuse Type Board Mount (Cartridge Style Excluded)  
DC Cold Resistance 0.016 Ohms  
Current Rating (Amps) 4 A  
Color -  
Breaking Capacity @ Rated Voltage 50A  
Approval Agency CSA, METI, UR  

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8536.10.0040

Parts Introduction

Manufacturer Part Number

MRSN

Manufacturer

Littelfuse

Introduction

The Littelfuse NANO² 451 series is a compact, surface mount fuse designed for modern, space-constrained circuit protection applications. This fuse offers a fast-acting response time and high breaking capacity, making it a reliable solution for protecting sensitive electronic components.

Product Features and Performance

Current Rating: 4A

Voltage Rating: 125V AC

Response Time: Fast Blow

Package/Case: 2-SMD, Square End Block

Breaking Capacity @ Rated Voltage: 50A

Melting I²t: 3.152

Operating Temperature: -55°C to 125°C

Product Advantages

Compact size for efficient space utilization

Fast-acting response for reliable circuit protection

High breaking capacity to handle fault conditions

Suitable for a wide range of operating temperatures

Key Reasons to Choose This Product

Robust circuit protection for sensitive electronics

Reliable performance in demanding applications

Optimized for modern, space-constrained designs

Approved by leading safety agencies (CSA, METI, UR)

Quality and Safety Features

Approved by leading safety agencies (CSA, METI, UR)

Designed and manufactured to stringent quality standards

Compatibility

This fuse is compatible with a wide range of electronic devices and applications that require compact, fast-acting circuit protection.

Application Areas

Consumer electronics

Industrial equipment

Telecommunications equipment

Automotive electronics

Product Lifecycle

The Littelfuse NANO² 451 series is an active product, and there are no plans for its discontinuation. There are no direct equivalent or alternative models available at this time. If you require further information or assistance, please contact our sales team through our website.

Parts with Similar Specifications

The three parts on the right have similar specifications to Littelfuse Inc. 0451004.MRSN

Product Attribute 0451004.MRSN 0451005.MR 045101.5MR 0451004.NRL
Part Number 0451004.MRSN 0451005.MR 045101.5MR 0451004.NRL
Manufacturer Littelfuse Inc. Littelfuse Inc. Littelfuse Inc. Littelfuse Inc.
Approval Agency CSA, METI, UR CSA, PSE, UL CSA, PSE, UL CSA, PSE, UL
Size / Dimension 0.240' L x 0.106' W x 0.106' H (6.10mm x 2.69mm x 2.69mm) 0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm) 0.240' L x 0.106' W x 0.106' H (6.10mm x 2.69mm x 2.69mm) 0.240" L x 0.106" W x 0.106" H (6.10mm x 2.69mm x 2.69mm)
Current Rating (Amps) 4 A 5 A 1.5 A 4 A
DC Cold Resistance 0.016 Ohms 0.0125 Ohms 0.063 Ohms 0.016 Ohms
Breaking Capacity @ Rated Voltage 50A 50A 50A 50A
Response Time Fast Blow Fast Blow Fast Blow Fast Blow
Package Tape & Reel (TR) Tape & Reel (TR) Tape & Reel (TR) Tape & Reel (TR)
Fuse Type Board Mount (Cartridge Style Excluded) Board Mount (Cartridge Style Excluded) Board Mount (Cartridge Style Excluded) Board Mount (Cartridge Style Excluded)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Operating Temperature -55°C ~ 125°C -55°C ~ 125°C -55°C ~ 125°C -55°C ~ 125°C
Melting I²t 3.152 5.566 0.853 3.152
Voltage Rating - AC 125 V 125 V 125 V 125 V
Series NANO²® 451 NANO²® 451 NANO²® 451 NANO²® 451
Package / Case 2-SMD, Square End Block 2-SMD, Square End Block 2-SMD, Square End Block 2-SMD, Square End Block
Color - - - -

0451004.MRSN Datasheet PDF

Download 0451004.MRSN pdf datasheets and Littelfuse Inc. documentation for 0451004.MRSN - Littelfuse Inc..

Datasheets
Cylindrical Battery Holders.pdf
HTML Datasheet
Cylindrical Battery Holders.pdf

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Your Faithful Supply Chain Partner -

Contact us if you have any questions.

  1. Phone
    +00852 9146 4856

Certifications & Memberships

View More
0451004.MRSN Image

0451004.MRSN

Littelfuse Inc.
32D-0451004.MRSN

Want a better price? Please Add to Cart, we'll contact you immediately.

0 RFQ
Shopping cart (0 Items)
It is empty.
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB