2

Technical Data ELX1180

Effective June 2022

MFSA

SMD current sensing resistor-metal foil

www.eaton.com/electronics

Mechanical parameters- Inches [mm]

Family

Size code

L

W

C

T

Figure

MFSA0402

0402

[1005]

0.040 ± 0.004

[1.0 ± 0.10]

0.020 ± 0.004

[0.55 ± 0.10]

0.012 ± 0.004

[0.30 ± 0.10]

0.018 ± 0.004

[0.45 ± 0.10]

A

MFSA0603

0603

[1608]

0.063 ± 0.008

[1.60 ± 0.20]

0.031 ± 0.008

[0.80 ± 0.20]

0.016 ± 0.008

[0.40 ± 0.20]

0.028 ± 0.008

[0.70 ± 0.20]

A

MFSA0805

0805

[2012]

0.079 ± 0.008

[2.0 ± 0.20]

0.049 ± 0.008

[1.25 ± 0.20]

0.016 ± 0.012

[0.40 ± 0.30]

0.028 ± 0.008

[0.70 ± 0.20]

A

MFSA1206

1206

[3216]

0.126 ± 0.008

[3.20 ± 0.20]

0.063 ± 0.008

[1.60 ± 0.20]

0.020 ± 0.012

[0.50 ± 0.30]

0.028 ± 0.008

[0.70 ± 0.20]

A

MFSA0508

0508

[1220]

0.049 ± 0.008

[1.25 ± 0.20]

0.079 ± 0.008

[2.0 ± 0.20]

0.016 ± 0.008

[0.40 ± 0.20]

0.020 ± 0.008

[0.50 ± 0.20]

B

MFSA0612

0612

[1632]

0.063 ± 0.008

[1.60 ± 0.20]

0.126 ± 0.008

[3.20 ± 0.20]

0.016 ± 0.008

[0.40 ± 0.20]

0.020 ± 0.008

[0.50 ± 0.20]

B

Recommended PCB layout- mm

Construction

Figure A

Figure B

Family

Resistance

(mΩ)

A

L

B

MFSA0402

10 ~ 20

0.7

0.45

0.375

MFSA0603

5 ≤ R ≤ 20

1

0.6

1.1

MFSA0805

5 ≤ R ≤ 30

1.4

1.2

1

MFSA1206

5 ≤ R ≤ 30

1.8

1.6

1.55

31 ≤ R ≤ 40

1.8

2.2

1.35

MFSA0508

5 ≤ R ≤ 10

2.4

0.45

0.875

MFSA0612

1 ≤ R ≤ 20

3.8

0.85

0.625

Part marking

Family

Marking

MFSA0402

No marking

MFSA0603

No marking

MFSA0805

xxx: (xxx= resistance value in ohms

expressed in 3 digits)

005 = 0.005 Ω or 5 mΩ

010 = 0.010 Ω or 10 mΩ

exception: 6.5 = 0.0065 Ω or 6.5 mΩ

MFSA1206

MFSA0508

No marking

MFSA0612

xxx: (xxx= resistance value in ohms

expressed in 3-4 digits

0025 = 0.0025 Ω or 2.5 mΩ

005 = 0.005 Ω or 5 mΩ

010 = 0.010 Ω or 10 mΩ

1. The copper foil thickness of PCB needs 3 oz. minimum

2. PCB layout dimension tolerance is +/-0.1 mm.

3. The Resistance will change slightly after soldered; it is dependent on PCB pad size deign

and it’s necessary to consider the effect of the resistance increase or decrease.