Features

Test Qualification for Passive Components

in Automotive Applications

reflow profiles

assembly

MF-LSMF Series - PTC Resettable Fuses

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

**Bourns is using the definition that appears to be the prevalent definition used as the industry standard at this time. The Bourns definition of “halogen-free” is:

Bromine (Br) content:

≤ 900 ppm; Chlorine (Cl) content: ≤ 900 ppm; Total Br + Cl content: ≤1500 ppm.

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.

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

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-LSMF185/33X

33.0

40

1.85

3.70

0.045

0.150

8.0

2.50

1.5

MF-LSMF260X

24.0

20

2.60

5.20

0.020

0.075

8.0

5.00

1.5

MF-LSMF300X

6.0

40

3.00

5.00

0.015

0.048

8.0

20.00

1.5

MF-LSMF300/24X

24.0

20

3.00

5.20

0.020

0.075

8.0

5.00

1.5

Test Procedures And Requirements For Model MF-LSMF 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 50256634

http://www.tuvdotcom.com/ Follow link to “Certificate Search”, enter 50256634