MF-RX135/72-2 Bourns MF-RX135/72-2 is a 72V, 1.35A polymeric PTC resettable fuse in a radial disc package. It is RoHS, lead-free, and halogen-free compliant.
Mfr Part #:

MF-RX135/72-2

Available from 1 distributors
Mfr Name: Bourns
Bourns
Bourns MF-RX135/72-2 is a 72V, 1.35A polymeric PTC resettable fuse in a radial disc package. It is RoHS, lead-free, and halogen-free compliant.
Total Stock: 857 pcs
$ Price Range: $0.19 - $0.44

MF-RX135/72-2 Available from 1 distributor

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Non-Authorised
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857 pcs
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MF-RX135/72-2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Current - Max
Current - Trip (It)
Halogen Free
Height
Lead Spacing
Length
Mounting Type
Operating Temperature
Prop 65
Resistance
Resistance - Initial (Ri) (Min)
Resistance - Initial (Ri) (Typ)
Resistance - Post Trip (R1 Max)
Tape & Reel
Time to Trip
Tripped Power Dissipation (Typ)
Type
Voltage
Width

MF-RX135/72-2 Description

Short technical summary and product information.

The Bourns MF-RX135/72-2 is a polymeric PTC resettable fuse from the MF-RX/72 series, designed for overcurrent protection in low voltage circuits up to 72V. It has a hold current of 1.35A and a trip current of 2.70A, with a maximum current rating of 40A. The initial resistance ranges from 120mΩ typical to 300mΩ maximum, and the post-trip resistance is 380mΩ maximum. The time to trip at 1.35A is 9.6 seconds maximum, with a typical tripped power dissipation of 1.70W.

 

This component is housed in a radial disc package with a lead spacing of 5.10mm, measuring 12.26mm in length, 3.10mm in width, and a seated height of 18.26mm. It is designed for through-hole mounting and operates over a temperature range of -40°C to 85°C. The device uses a cured, flame retardant epoxy polymer insulating material that meets UL 94 V-0 requirements.

 

The MF-RX135/72-2 is suitable for applications such as security and fire alarm systems, loudspeakers, and power transformers. It is RoHS compliant, lead-free, and halogen-free, with agency recognitions including cUL and TÜV.

MF-RX135/72-2 Quick Information

Product Type: PTC Resettable Fuse
Series: MF-RX/72
Canonical Name: Bourns MF-RX135/72-2 PTC Resettable Fuse
Subcategory: Polymeric PTC

MF-RX135/72-2 Compliance

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

MF-RX135/72-2 Estimated Pricing

Qty Low High
1+ $0.44 $0.44
10+ $0.38 $0.38
50+ $0.34 $0.34
100+ $0.31 $0.31
250+ $0.28 $0.28
500+ $0.26 $0.26
1,000+ $0.22 $0.22
3,000+ $0.19 $0.19

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

MF-RX135/72-2 Features

  • Polymeric PTC resettable fuse design.
  • Rated for 72V maximum voltage.
  • 1.35A hold current with 2.70A trip current.
  • 40A maximum current handling capability.
  • RoHS, lead-free, and halogen-free compliant.

MF-RX135/72-2 Applications

  • Ideal for security and fire alarm systems.
  • Used in loudspeaker protection circuits.
  • Suitable for power transformer overcurrent protection.
  • Protects low voltage power supply circuits.

MF-RX135/72-2 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the MF-RX135/72-2?

The hold current (Ih) is 1.35A.

What is the maximum voltage rating?

The maximum voltage rating is 72V.

What is the trip current?

The trip current (It) is 2.70A.

What is the operating temperature range?

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

What is the package type?

The package type is Radial, Disc.

What is the maximum initial resistance?

The maximum initial resistance (Ri) is 300mΩ.

Is the MF-RX135/72-2 RoHS compliant?

Yes, it is RoHS3 compliant.

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