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045903.5UR Littelfuse 045903.5UR is a 3.5A, 125VAC/VDC, very fast-acting surface mount fuse in a 2-SMD J-Lead package. It features a breaking capacity of 50A AC and 300A DC.
Mfr Part #:

045903.5UR

Available from 3 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse 045903.5UR is a 3.5A, 125VAC/VDC, very fast-acting surface mount fuse in a 2-SMD J-Lead package. It features a breaking capacity of 50A AC and 300A DC.
Total Stock: 8,013 pcs

045903.5UR Available from 3 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
6,000 pcs
6000 pcs On Request 1 On Request On Request 14+ On Request On Request
Non-Authorised Inventory information
2,000 pcs
2000 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
13 pcs
13 pcs On Request 1 On Request On Request On Request On Request On Request

045903.5UR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Approval Agency
Breaking Capacity
Breaking Capacity @ Rated Voltage
Current Rating
Current Rating (Amps)
Fuse Type
Height
Length
Melting I²t
Mounting Type
Operating Temperature
Package / Case
Resistance
Response Time
Standard Package Qty
Termination Style
Voltage Rating
Width

045903.5UR Description

Short technical summary and product information.

The Littelfuse 045903.5UR is a 459 Series PICO SMF very fast-acting surface mount fuse. It is rated for 3.5A at 125VAC and 125VDC, with a breaking capacity of 50A AC and 300A DC. The fuse has a nominal cold resistance of 0.0233 Ω and a melting I²t of 1.65 A²sec.

 

This fuse is designed for overcurrent protection in a wide range of applications including wireless base stations, network equipment, and telecom equipment. It operates over a temperature range of -55°C to 125°C and is RoHS compliant.

 

The device is housed in a 2-SMD, J-Lead package measuring 7.24mm x 4.32mm x 3.05mm. It is supplied in tape and reel packaging with a standard quantity of 500 pieces per reel.

045903.5UR Quick Information

Product Type: Surface Mount Fuse
Series: 459
Canonical Name: Littelfuse 459 Series PICO SMF Very Fast-Acting Surface Mount Fuse, 3.5A, 125VAC/VDC
Subcategory: Surface Mount Fuse

045903.5UR Compliance

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

045903.5UR Features

  • Very fast-acting response time.
  • Rated 3.5A at 125VAC/VDC.
  • 50A AC / 300A DC breaking capacity.
  • Surface mount 2-SMD J-Lead package.
  • RoHS compliant and CSA/UL approved.

045903.5UR Applications

  • Overcurrent protection in wireless base stations.
  • Protection for network equipment circuits.
  • Used in telecom power supply modules.
  • Suitable for board-level power distribution.

045903.5UR FAQs

5 frequently asked questions generated from this part’s specifications.
What is the current rating of the 045903.5UR fuse?

The current rating is 3.5 A.

What is the voltage rating of this fuse?

The voltage rating is 125 VAC and 125 VDC.

What is the breaking capacity of the 045903.5UR?

The breaking capacity is 50A AC at 125VAC and 300A DC at 125VDC.

Is the 045903.5UR a fast-acting or slow-blow fuse?

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

What package does the 045903.5UR come in?

It comes in a 2-SMD, J-Lead surface mount package.

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