MF-RX/72 Series - PTC Resettable Fuses

Test Procedures and Requirements

Item

Test Conditions

Accept/Reject Criteria

Visual/Mechanical

Verify dimensions and materials

Per MF physical description

Resistance

In still air @ 23 °C

Rmin ≤ R ≤ Rmax

Time to Trip

5 times Ihold, Vmax, 23 °C

T ≤ max. time to trip (seconds)

Hold Current

30 min. at Ihold

No trip

Trip Cycle Life

Vmax, Imax, 100 cycles

No arcing or burning

Trip Endurance

Vmax, 48 hours

No arcing or burning

Solderability

245 °C ± 5 °C, 5 seconds

95 % min. coverage

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

Typical Time to Trip at 23 ˚C

The Time to Trip curves represent

typical performance of a device in a

simulated application environment.

Actual performance in specific

customer applications may differ from

these values due to the influence of

other variables.

100

1000

10

1

0.1

0.01

0.001

0.1

110

100

Fault Current (Amps)

0.01

0.001

110

100

0.1

1

10

100

1000

Fault Current (Amps)