MF-RHS Series - High Temperature PTC Resettable Fuses

Applications

n

DC motors

n

Servers and data centers

n

HVAC (heating, ventilation and cooling)

protection in motors, air-flow detection

and I/O

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, 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-RHS350

4.8

4.5

4.1

3.5

3.2

3.0

2.8

2.5

2.1

1.0

MF-RHS400

5.2

4.9

4.5

4.0

3.5

3.3

3.0

2.6

2.2

1.0

MF-RHS450

5.4

5.2

5.0

4.5

3.8

3.5

3.2

2.9

2.4

1.1

MF-RHS500

6.3

6.0

5.7

5.0

4.7

4.4

4.0

3.8

3.3

1.5

MF-RHS550

8.1

7.2

6.2

5.5

5.1

4.8

4.3

4.0

3.5

1.7

MF-RHS600

8.6

7.7

6.6

6.0

5.5

5.2

4.8

4.4

3.8

1.8

MF-RHS650

9.0

8.1

7.2

6.5

6.0

5.5

5.1

4.7

4.1

1.9

MF-RHS700

9.4

8.6

7.9

7.0

6.4

5.8

5.4

4.9

4.4

2.0

MF-RHS750

9.9

9.1

8.4

7.5

6.7

6.1

5.8

5.2

4.6

2.2

MF-RHS800

11.2

9.7

8.9

8.0

7.1

6.5

6.3

5.8

4.8

2.6

MF-RHS900

13.1

11.4

10.3

9.0

8.4

7.8

7.4

6.6

5.9

3.1

MF-RHS1000

15.0

13.1

11.2

10.0

9.4

8.8

8.1

7.6

6.8

3.5

MF-RHS1100

15.7

13.8

12.2

11.0

10.0

9.2

8.4

7.9

7.1

3.6

MF-RHS1200

16.3

14.6

12.9

12.0

10.5

9.6

8.9

8.2

7.3

3.8

MF-RHS1300

16.8

15.4

14.0

13.0

11.5

10.3

9.4

8.5

7.5

3.9

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.