Features

0603 footprint

to fault events

Applications

protection

protection

MF-FSMF Series - PTC Resettable Fuses

* RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.

**Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br ) content is 900 ppm or less;

(b) the Chlorine ( Cl ) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine ( Cl ) content is 1500 ppm or less.

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

Electrical Characteristics

Model

V max.

Volts

I max.

Amps

Ihold

Itrip

Resistance

Max. Time

To Trip

Tripped

Power

Dissipation

Amperes

at 23 °C

Ohms

at 23 °C

Amperes

at 23 °C

Seconds

at 23 °C

Watts

at 23 °C

Hold

Trip

RMin.

R1Max.

Typ.

MF-FSMF010X

15

40

0.10

0.30

0.900

6.000

0.50

1.00

0.5

MF-FSMF020X

9

40

0.20

0.50

0.550

3.500

1.00

0.60

0.5

MF-FSMF035X

6

40

0.35

0.75

0.200

1.400

8.00

0.10

0.5

MF-FSMF050X

6

40

0.50

1.00

0.100

0.800

8.00

0.10

0.5

Environmental Characteristics

Operating Temperature......................................... -40 °C to +85 °C

Maximum Device Surface Temperature

in Tripped State .................................................. 125 °C

Passive Aging ....................................................... +85 °C, 1000 hours..................................... ±5 % typical resistance change

Humidity Aging ..................................................... +85 °C, 85 % R.H. 1000 hours ................... ±5 % typical resistance change

Thermal Shock ..................................................... +85 °C to -40 °C, 20 times ......................... ±10 % typical resistance change

Solvent Resistance............................................... MIL-STD-202, Method 215......................... No change

Vibration ............................................................... MIL-STD-883C, Method 2007.1, ................ No change

Condition A

Test Procedures And Requirements For Model MF-FSMF Series

Test

Test Conditions

Accept/Reject Criteria

Visual/Mech. ......................................................... Verify dimensions and materials ................. Per MF physical description

Resistance............................................................ In still air @ 23 °C........................................ Rmin

≤ R ≤ R1max

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.......................................................... ANSI/J-STD-002 ......................................... 95 % min. coverage

UL File Number .................................................... E174545

http://www.ul.com/ Follow link to Certifications, then UL File No., enter E174545

TÜV Certificate Number ....................................... R 50171531

http://www.tuvdotcom.com/ Follow link to “other certificates”, enter File No. 50171531

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-FSMF010X

0.13

0.12

0.11

0.10

0.08

0.07

0.06

0.05

0.03

MF-FSMF020X

0.27

0.25

0.23

0.20

0.17

0.14

0.12

0.10

0.07

MF-FSMF035X

0.47

0.41

0.38

0.35

0.29

0.26

0.24

0.20

0.14

MF-FSMF050X

0.67

0.59

0.54

0.50

0.41

0.37

0.34

0.29

0.20