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FSMD300R
FSMD300R
RFE/Fuzetec
RESETTABLE FUSE - SMD, 1812 SIZE
31101 Pcs New Original In Stock
PTC Resettable Fuse 6V 3 A Ih Surface Mount 1812 (4532 Metric), Concave
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FSMD300R RFE/Fuzetec
4.9 / 5.0 - (241 Ratings)

FSMD300R

Product Overview

9865169

DiGi Electronics Part Number

FSMD300R-DG

Manufacturer

RFE/Fuzetec
FSMD300R

Description

RESETTABLE FUSE - SMD, 1812 SIZE

Inventory

31101 Pcs New Original In Stock
PTC Resettable Fuse 6V 3 A Ih Surface Mount 1812 (4532 Metric), Concave
PTC Resettable Fuses
FSMD300R Datasheet
Quantity
Minimum 1

Purchase and inquiry

Quality Assurance & Returns

365 - Day Quality Guarantee - Every part fully backed.

90 - Day Refund or Exchange - Defective parts? No hassle.

Limited Stock, Order Now - Get reliable parts without worry.

Global Shipping & Secure Packaging

Worldwide Delivery in 3-5 Business Days

100% ESD Anti-Static Packaging

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In Stock (All prices are in USD)
  • QTY Target Price Total Price
  • 50 0.2668 13.3400
  • 100 0.2325 23.2500
  • 250 0.2162 54.0500
  • 500 0.1900 95.0000
  • 1000 0.1638 163.8000
  • 1500 0.1209 181.3500
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FSMD300R Technical Specifications

Category PTC Resettable Fuses

Manufacturer RFE/Fuzetec

Packaging Tape & Reel (TR)

Series FSMD1812

Product Status Active

Type -

Voltage - Max 6V

Current - Hold (Ih) (Max) 3 A

Current - Trip (It) 5 A

Current - Max 100 A

Time to Trip 4 s

Resistance - Initial (Ri) (Min) 12 mOhms

Resistance - Post Trip (R1) (Max) 40 mOhms

Operating Temperature -40°C ~ 85°C

Ratings -

Mounting Type Surface Mount

Package / Case 1812 (4532 Metric), Concave

Size / Dimension 0.179" L x 0.128" W (4.55mm x 3.24mm)

Height - Seated (Max) -

Thickness (Max) 0.061" (1.55mm)

Lead Spacing -

Approval Agency cUL, TUV, UL

Datasheet & Documents

Datasheets

Download FSMD300R Product Specification (PDF)
HTML Datasheet

FSMD300R-DG

Environmental & Export Classification

RoHS Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8533.40.8070

Additional Information

Other Names
3451-FSMD300RTR
Standard Package
50

Reviews

4.9/5.0-(Show up to 5 Ratings)
童***者
Dec 02, 2025
5.0
配送速度令人驚喜，服務效率非常高！
Freu***okus
Dec 02, 2025
4.8
Bei DiGi Electronics ist der Service nach dem Kauf wirklich ausgezeichnet.
ふわ***こもこ
Dec 02, 2025
4.9
Di Digi Electronicsは、迅速な発送と丁寧なサポートで全て満足です。
Merr***adow
Dec 02, 2025
4.8
The shipment arrived in excellent condition and quickly, and customer care was top-notch.
Celes***lEcho
Dec 02, 2025
4.9
Whenever I have a question, their support team provides expert assistance promptly.
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Frequently Asked Questions (FAQ)

What is a PTC resettable fuse and how does it work?
A PTC resettable fuse is a protective component that automatically limits current flow when overload occurs, then resets once the fault is removed. It helps prevent circuit damage by tripling at a specific current level and restoring normal operation afterward.
Is the FSMD300R suitable for surface-mount applications in electronic devices?
Yes, the FSMD300R is designed as an SMD (Surface Mount Device) in 1812 size, making it ideal for compact and space-sensitive electronic circuit protection applications.
What are the key electrical specifications of the FSMD300R resettable fuse?
This fuse is rated for a maximum voltage of 6V, with a holding current of 3A, trip current of 5A, and a maximum surge current of 100A. It trips in approximately 4 seconds under overload conditions.
Is the FSMD300R compliant with international safety and environmental standards?
Yes, the fuse is certified by cUL, TUV, and UL, and is ROHS3 compliant, ensuring it meets safety, environmental, and quality standards for electronic products.
What are the operating temperature range and physical dimensions of the FSMD300R fuse?
The fuse operates reliably within -40°C to 85°C and measures 4.55mm in length and 3.24mm in width, with a thickness of 1.55mm, suitable for various circuit environments.
DiGi Certification
ISO 209001_2015
ISO 209001_2015
ISO 14001_2015
ISO 2014001_2015
ISO 45001_2018
ISO 2045001_2018
DUNS REGISTERED
DUNS REGISTERED
Companines Registry
Companines Registry
ASA Certificate
ASA Certificate
UKAS
UKAS
ESD Certificate
ESD Certificate
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FSMD300R CAD Models

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