MF-R050 Bourns MF-R050 is a polymeric PTC resettable fuse rated for 60V max and 500mA hold current, with 1A trip current in a radial through-hole package.
Mfr Part #:

MF-R050

Available from 2 distributors
Mfr Name: Bourns
Bourns
Bourns MF-R050 is a polymeric PTC resettable fuse rated for 60V max and 500mA hold current, with 1A trip current in a radial through-hole package.
Total Stock: 49,561 pcs
$ Price Range: $0.17 - $0.40

MF-R050 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
49,500 pcs
49500 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
61 pcs
61 pcs On Request 1 On Request On Request On Request On Request On Request

MF-R050 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Current
Current - Trip (Itrip)
Halogen Free
Height
Lead Spacing
Lead Style
Mounting Type
Operating Temperature
Power Dissipation (Tripped)
Prop 65
Resistance
Resistance (Initial)
Storage Temperature
Tape & Reel
Time to Trip
Type
Voltage

MF-R050 Description

Short technical summary and product information.

The Bourns MF-R050 is a polymeric positive temperature coefficient (PTC) resettable overcurrent protection device. It is designed to protect circuits from overcurrent faults by transitioning from a low-resistance state to a high-resistance state when the current exceeds the trip threshold. Once the fault is cleared and power is removed, the device resets to its low-resistance state.

 

Key electrical specifications include a maximum voltage of 60V, a hold current of 500 mA, and a trip current of 1 A. The initial resistance ranges from 0.41 Ω to 0.77 Ω, with a maximum post-trip resistance of 1.17 Ω. The maximum time to trip at 2.5 A is 4 seconds, and typical power dissipation when tripped is 0.75 W.

 

The MF-R050 is housed in a radial disc package with through-hole mounting, measuring 7.90 mm diameter by 3.10 mm thickness, with a height of 13.70 mm and lead spacing of 5.10 mm. It operates over a temperature range of -40°C to 85°C. The device is RoHS compliant, lead-free, and halogen-free.

MF-R050 Quick Information

Product Type: PTC Resettable Fuse
Series: MF-R050
Canonical Name: Bourns MF-R050 PTC Resettable Fuse
Subcategory: Polymeric PTC

MF-R050 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 70
REACH Status: REACH Unaffected
Lead Free: Lead Free

MF-R050 Estimated Pricing

Qty Low High
1+ $0.40 $0.40
10+ $0.35 $0.35
50+ $0.30 $0.30
100+ $0.27 $0.27
250+ $0.24 $0.24
500+ $0.22 $0.22
1,000+ $0.21 $0.21
3,000+ $0.18 $0.18
6,000+ $0.17 $0.17

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

MF-R050 Features

  • Polymeric PTC resettable overcurrent protection.
  • Rated for 60V maximum voltage operation.
  • 500 mA hold current with 1 A trip current.
  • Radial through-hole package for easy mounting.
  • RoHS compliant, lead-free, and halogen-free.

MF-R050 Applications

  • Overcurrent protection in power supply circuits.
  • Protection for battery charging and management systems.
  • Used in telecommunications and networking equipment.
  • Ideal for consumer electronics and industrial controls.

MF-R050 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the Bourns MF-R050?

The hold current (Ihold) is 500 mA.

What is the maximum voltage rating for the MF-R050?

The maximum voltage is 60 V.

What is the trip current of the MF-R050?

The trip current (Itrip) is 1 A.

What is the operating temperature range?

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

What is the package type of the MF-R050?

The package is Radial, Disc with through-hole mounting.

What is the maximum time to trip at 2.5 A?

The maximum time to trip at 2.5 A is 4 seconds.

Is the MF-R050 RoHS compliant?

Yes, the MF-R050 is RoHS compliant and lead-free.

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