MF-RHT Series - High Temperature 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

At specified current, 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

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-RHT050

0.68

0.62

0.56

0.5

0.44

0.4

0.36

0.34

0.28

0.12

MF-RHT070

0.95

0.87

0.79

0.7

0.62

0.56

0.51

0.47

0.39

0.17

MF-RHT100

1.36

1.24

1.13

1.0

0.89

0.80

0.73

0.67

0.56

0.24

MF-RHT200

2.71

2.49

2.26

2.0

1.77

1.60

1.46

1.34

1.11

0.49

MF-RHT200/32

2.71

2.49

2.26

2.0

1.77

1.60

1.46

1.34

1.11

0.49

MF-RHT300

4.07

3.74

3.41

3.0

2.65

2.40

2.21

2.00

1.66

0.74

MF-RHT400

5.57

5.11

4.65

4.0

3.62

3.29

3.01

2.73

2.27

1.01

MF-RHT450

6.1

5.6

5.1

4.5

4.0

3.6

3.3

3.0

2.5

1.1

MF-RHT500

6.78

6.22

5.67

5.0

4.44

4

3.67

3.33

2.78

1.22

MF-RHT550

7.47

6.86

6.24

5.5

4.85

4.41

4.04

3.66

3.05

1.36

MF-RHT600

8.20

7.50

6.80

6.0

5.3

4.9

4.4

4

3.3

1.5

MF-RHT650

8.8

8.1

7.4

6.5

5.7

5.3

4.8

4.3

3.6

1.6

MF-RHT700

9.51

8.73

7.95

7.0

6.17

5.61

5.15

4.66

3.88

1.73

MF-RHT750

10.2

9.4

8.6

7.5

6.6

6.1

5.6

5.0

4.1

1.9

MF-RHT800

10.87

9.98

9.08

8.0

7.06

6.41

5.88

5.33

4.43

1.97

MF-RHT900

12.21

11.19

10.16

9.0

7.97

7.20

6.56

6.04

5.01

2.19

MF-RHT1000

13.6

12.5

11.4

10.0

8.8

8.10

7.40

6.60

5.50

2.5

MF-RHT1100

14.94

13.72

12.49

11.0

9.7

8.82

8.09

7.32

6.09

2.71

MF-RHT1300

17.7

16.3

14.8

13.0

11.4

10.5

9.6

8.6

7.2

3.3

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.