MF-SM300-2 Bourns MF-SM300-2 is a polymeric PTC resettable fuse with 3A hold current, 6V max voltage, and 100A fault current rating. Surface mount in 2-SMD package.
Mfr Part #:

MF-SM300-2

Available from 2 distributors
Mfr Name: Bourns
Bourns
Bourns MF-SM300-2 is a polymeric PTC resettable fuse with 3A hold current, 6V max voltage, and 100A fault current rating. Surface mount in 2-SMD package.
Total Stock: 42 pcs
$ Price Range: $0.18 - $0.52

MF-SM300-2 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
33 pcs
33 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
9 pcs
9 pcs On Request 1 On Request On Request On Request On Request On Request

MF-SM300-2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Agency Approvals
Automotive Grade
Current
Halogen Free
Lead Style
Length
Max Current (Imax)
Mounting Type
Operating Temperature
Prop 65
Ratings
Resistance
Resistance - Minimum
Tape & Reel
Termination Style
Thickness (Max)
Time to Trip
Trip Current (Itrip)
Tripped Power Dissipation
Type
Voltage
Width

MF-SM300-2 Description

Short technical summary and product information.

The Bourns MF-SM300-2 is a polymeric positive temperature coefficient (PTC) resettable fuse from the MF-SM series. It is designed for overcurrent protection in low-voltage applications. The device offers a hold current of 3 A at 23°C and a trip current of 6 A, with a maximum voltage rating of 6 V and a maximum fault current of 100 A.

 

Electrical characteristics include a minimum resistance of 15 mΩ and a maximum resistance of 48 mΩ at 23°C. The typical time to trip is 35 seconds at 23°C, and the tripped power dissipation is 1.5 W. The operating temperature range is -40°C to +85°C.

 

The MF-SM300-2 is a surface mount device in a 2-SMD package, measuring 7.31 mm in length, 5.44 mm in width, and 3.00 mm maximum thickness. It is suitable for automated assembly. The component is RoHS compliant, lead-free, and halogen-free. It carries agency approvals from cUL and TÜV.

MF-SM300-2 Quick Information

Product Type: PTC Resettable Fuse
Series: MF-SM300
Canonical Name: Bourns MF-SM300-2 PTC Resettable Fuse
Subcategory: Surface Mount PTC

MF-SM300-2 Compliance

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

MF-SM300-2 Estimated Pricing

Qty Low High
1+ $0.52 $0.52
10+ $0.39 $0.39
50+ $0.37 $0.37
100+ $0.28 $0.28
200+ $0.26 $0.26
500+ $0.24 $0.24
1,000+ $0.21 $0.21
2,000+ $0.20 $0.20
4,000+ $0.18 $0.18

Estimated market price range - modelled values for guidance only, not live distributor offers.

MF-SM300-2 Features

  • 3A hold current at 23°C.
  • 6V maximum voltage rating.
  • 100A maximum fault current capability.
  • Surface mount 2-SMD package.
  • cUL and TÜV agency approved.

MF-SM300-2 Applications

  • Used in overcurrent protection circuits.
  • Suitable for battery pack protection.
  • Ideal for low-voltage power supplies.
  • Applied in automotive electronics (AEC-Q200 pending).

MF-SM300-2 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the MF-SM300-2?

3 A at 23°C.

What is the maximum voltage rating?

6 V.

What is the maximum fault current?

100 A.

What is the typical time to trip?

35 seconds at 23°C.

What is the operating temperature range?

-40°C to +85°C.

What package is the MF-SM300-2 available in?

Surface mount 2-SMD package.

What agency approvals does it have?

cUL and TÜV.

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