MF-R300-2 Bourns MF-R300-2 is a polymeric PTC resettable fuse rated for 30V max and 3A hold current in a radial through-hole package.
Mfr Part #:

MF-R300-2

Available from 2 distributors
Mfr Name: Bourns
Bourns
Bourns MF-R300-2 is a polymeric PTC resettable fuse rated for 30V max and 3A hold current in a radial through-hole package.
Total Stock: 1,350 pcs
$ Price Range: $0.22 - $0.52

MF-R300-2 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
1,340 pcs
1340 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
10 pcs
10 pcs On Request 1 On Request On Request On Request On Request On Request

MF-R300-2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Agency Approvals
Automotive Grade
Current
Halogen Free
Height
Hold Current (Ihold)
Initial Resistance (Rmin/Rmax)
Lead Spacing
Length
Max Current (Imax)
Max Voltage (Vmax)
Mounting Type
Operating Temperature
Prop 65
Resistance
SVHC Present
Tape & Reel
Time to Trip
Trip Current (Itrip)
Tripped Power Dissipation
Type
Voltage
Width

MF-R300-2 Description

Short technical summary and product information.

The Bourns MF-R300-2 is a polymeric positive temperature coefficient (PTC) resettable fuse designed for overcurrent protection in electronic circuits. It has a hold current of 3 A at 23°C and a trip current of 6 A, with a maximum voltage rating of 30 V and a maximum interrupt current of 40 A.

 

This device features a low initial resistance range of 0.020 Ω to 0.050 Ω and a maximum post-trip resistance of 80 mΩ. The time to trip at 15 A is 10.8 seconds maximum, and typical tripped power dissipation is 2 W. It operates over a temperature range of -40°C to 85°C.

 

The MF-R300-2 is packaged in a radial disc form factor with through-hole mounting and 5.10 mm lead spacing. It measures 12.00 mm long, 3.00 mm wide, and 18.30 mm high. The component is RoHS3 compliant, halogen free, and carries cUL and TUV agency approvals.

MF-R300-2 Quick Information

Product Type: PTC Resettable Fuse
Series: MF-R
Canonical Name: Bourns MF-R300-2 PTC Resettable Fuse
Subcategory: PTC Resettable Fuse

MF-R300-2 Compliance

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

MF-R300-2 Estimated Pricing

Qty Low High
1+ $0.52 $0.52
10+ $0.48 $0.48
50+ $0.39 $0.39
100+ $0.36 $0.36
250+ $0.33 $0.33
500+ $0.30 $0.30
1,000+ $0.27 $0.27
3,000+ $0.23 $0.23
6,000+ $0.22 $0.22

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

MF-R300-2 Features

  • Hold current 3 A at 23°C.
  • Maximum voltage rating of 30 V.
  • Maximum interrupt current of 40 A.
  • Low initial resistance 0.020 Ω to 0.050 Ω.
  • Radial through-hole package with 5.10 mm spacing.

MF-R300-2 Applications

  • Overcurrent protection in power supplies.
  • Protection for battery charging circuits.
  • Used in automotive and industrial electronics.
  • Suitable for general purpose low voltage circuits.

MF-R300-2 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the hold current of the MF-R300-2?

The hold current is 3 A at 23°C.

What is the maximum voltage rating?

The maximum voltage is 30 V.

What is the trip current?

The trip current is 6 A at 23°C.

What package type is the MF-R300-2?

It comes in a radial disc through-hole package.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C.

Does the MF-R300-2 have agency approvals?

Yes, it is recognized by cUL (E174545) and TÜV (R50366745).

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