Applications

■

Protection of automotive circuitry including engine control modules

■

Overcurrent surge protection of electronic equipment required to operate at high operating temperature ranges

■

Resettable fault protection for general electronic equipment

MF-USHT Series - PTC Resettable Fuses

Test Procedures and Requirements

Item

Test Condition

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

At specified current, Vmax, 23 °C, still air

T ≤ max. time to trip (seconds)

Hold Current

30 min. at Ihold, still air

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

Thermal Derating Table - Ihold (Amps)

Model

Ambient Operating Temperature

-40 °C

-20 °C

0 °C

+23 °C

+40 °C

+50 °C

+60 °C

+70 °C

+85 °C

+125 °C

MF-USHT010KX

0.15

0.13

0.12

0.10

0.09

0.08

0.07

0.07

0.06

0.03

MF-USHT016KX

0.23

0.21

0.19

0.16

0.14

0.13

0.12

0.11

0.09

0.04

MF-USHT020KX

0.29

0.26

0.23

0.20

0.18

0.16

0.15

0.13

0.11

0.05

MF-USHT035KX

0.51

0.46

0.41

0.35

0.31

0.28

0.26

0.23

0.20

0.09

MF-USHT050KX

0.73

0.66

0.58

0.50

0.44

0.41

0.37

0.34

0.28

0.14

MF-USHT075KX

1.09

0.98

0.87

0.75

0.66

0.61

0.56

0.50

0.42

0.20

MF-USHT110KX

1.60

1.44

1.28

1.10

0.97

0.89

0.81

0.74

0.62

0.30

MF-USHT125KX

1.81

1.64

1.45

1.25

1.10

1.01

0.93

0.84

0.70

0.34

MF-USHT150KX

2.18

1.97

1.74

1.50

1.32

1.22

1.11

1.01

0.84

0.41

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

Product Dimensions

K

C

Bottom View

D

E

A

B

C

Top View

Side View

Recommended Pad Layout

2.50

(0.098)

2.00

(0.079)

1.00

(0.039)

Terminal Material:

ENIG-plated terminals

Model

AB

C

D

E

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Min.

MF-USHT010KX

3.00

(0.118)

3.43

(0.135)

2.35

(0.093)

2.80

(0.110)

0.40

(0.016)

0.85

(0.033)

0.30

(0.012)

0.05

(0.002)

MF-USHT016KX

MF-USHT020KX

MF-USHT035KX

MF-USHT050KX

MF-USHT075KX

3.00

(0.118)

3.43

(0.135)

2.35

(0.093)

2.80

(0.110)

0.60

(0.024)

1.20

(0.047)

0.30

(0.012)

0.05

(0.002)

MF-USHT110KX

3.00

(0.118)

3.43

(0.135)

2.35

(0.093)

2.80

(0.110)

0.80

(0.031)

1.60

(0.063)

0.30

(0.012)

0.05

(0.002)

MF-USHT125KX

MF-USHT150KX

DIMENSIONS:

MM

(INCHES)