“freeXpansion Design” is a trademark of Bourns, Inc.

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their specific applications.

MF-USMF Series - PTC Resettable Fuses

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.

Thermal Derating Chart - Ihold (Amps)

Model

Ambient Operating Temperature

-40 ˚C

-20 ˚C

0 ˚C

23 ˚C

40 ˚C

50 ˚C

60 ˚C

70 ˚C

85 ˚C

MF-USMF005

0.08

0.07

0.06

0.05

0.04

0.04

0.03

0.03

0.02

MF-USMF010

0.15

0.13

0.12

0.10

0.09

0.08

0.07

0.06

0.05

MF-USMF020

0.32

0.28

0.24

0.20

0.18

0.16

0.14

0.12

0.10

MF-USMF035

0.51

0.46

0.40

0.34

0.30

0.27

0.24

0.22

0.18

MF-USMF050

0.76

0.66

0.58

0.48

0.42

0.38

0.35

0.29

0.23

MF-USMF075

1.10

0.97

0.86

0.72

0.64

0.58

0.55

0.47

0.39

MF-USMF110

1.60

1.42

1.26

1.10

0.94

0.86

0.80

0.70

0.58

MF-USMF150

2.30

2.02

1.76

1.43

1.24

1.11

1.00

0.85

0.65

MF-USMF175X

2.80

2.45

2.10

1.75

1.55

1.45

1.35

1.25

1.10

0.001

0.01

0.1

1

10

100

0.1

1

10

100

Fault Current (Amps)

MF-USMF010

MF-USMF020

MF-USMF035

MF-USMF050

MF-USMF150

MF-USMF175X

MF-USMF110

MF-USMF075

MF-USMF005

How to Order

MF - USMF 010 X - 2

Designator

Series

USMF = 1210 Surface Mount

Component

Hold Current, Ihold

005-175 (0.05-1.75 Amps)

Packaging

Packaged per EIA 481-1

-2 = Tape and Reel

Typical Part Marking

Represents total content. Layout may vary.

PART IDENTIFICATION:

MF-USMF005 = 0

MF-USMF010 = 1

MF-USMF020 = 2

MF-USMF035 = 3

MF-USMF050 = 4

MF-USMF075 = 5

MF-USMF110 = 6

MF-USMF150 = 8

MF-USMF175X = 9

BIWEEKLY DATE CODE:

WEEK 1 AND 2 = A

WEEK 51 AND 52 = Z

6

A

UNDERSCORE

SIGNIFIES

HALOGEN FREE

COMPLIANCE

MF-USMF SERIES, REV. N, 09/13