“freeXpansion Design” is a trademark of Bourns, Inc.

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

MF-FSMF Series - PTC Resettable Fuses

Product Dimensions

DIMENSIONS:

MM

(INCHES)

Additional Applications

Model

AB

C

D

Min.

Max.

Min.

Max.

Min.

Max.

Min.

MF-FSMF010X

1.45

(0.057)

1.85

(0.073)

0.65

(0.026)

1.05

(0.041)

0.30

(0.012)

0.65

(0.026)

0.20

(0.008)

MF-FSMF020X

1.45

(0.057)

1.85

(0.073)

0.65

(0.026)

1.05

(0.041)

0.30

(0.012)

0.65

(0.026)

0.20

(0.008)

MF-FSMF035X

1.45

(0.057)

1.85

(0.073)

0.65

(0.026)

1.05

(0.041)

0.30

(0.012)

0.65

(0.026)

0.20

(0.008)

MF-FSMF050X

1.45

(0.057)

1.85

(0.073)

0.65

(0.026)

1.05

(0.041)

0.65

(0.026)

1.00

(0.039)

0.20

(0.008)

Packaging: MF-FSMF010X = 5000 pcs. per reel;

MF-FSMF020X & MF-FSMF035X = 6000 pcs. per reel;

MF-FSMF050X = 4000 pcs. per reel

A

B

1.00 ± 0.05

(.039 ± .002)

C

Top View

Bottom View

Side View

Recommended Pad Layout

D

I

1.00 ± 0.05

(.039 ± .002)

0.70 ± 0.05

(.028 ± .002)

Terminal material:

Nickel/gold plated.

Termination pad solderability:

Standard Au finish:

Meets ANSI/J-STD-002 Category 2.

Recommended Storage:

40 °C max./70 % RH max.

How To Order

MF - FSMF 020 X - 2

Designator

Series

FSMF = 0603 Surface Mount

Component

Hold Current, Ihold

010-050 (0.10 - 0.50 Amps)

Packaging

Packaged per EIA 481-1

-2 = Tape and Reel

Typical Part Marking

PART IDENTIFICATION:

MF-FSMF010X = II

MF-FSMF020X = I

MF-FSMF035X = •

MF-FSMF050X = —

BIWEEKLY DATE CODE WILL APPEAR ON THE PACKAGING LABEL:

WEEK 1 AND 2 = A

WEEK 51 AND 52 = Z

Solder Reflow Recommendations

Notes:

• MF-FSMF models cannot be wave soldered. Please contact Bourns for hand soldering

recommendations.

• If reflow temperatures exceed the recommended profile, devices may not meet the

performance requirements.

• Compatible with Pb and Pb-free solder reflow profiles.

• Excess solder may cause a short circuit, especially during hand soldering. Please refer to

160–220

300

250

200

150

100

50

0

10–20

120

Preheating

Soldering

Cooling

Time (seconds)