Document No. 008-0542-0

Page 2 - 3

Rev. A

Series 73M1A, 73M2A, 73M3x & 73M5

Current Sense Resistor – up to 5W Power

ELECTRICAL CHARACTERISTICS

DERATING CURVE

Rated wattage is the maximum continuous power applicable at ambient temperature from -55°C to +70°C [73M5: -55°C to +105°C].

For ambient temperature above +70°C [+105°C], power rating is in accordance with Derating Curves below.

MECHANICAL SPECIFICATION

Type

Rated

Wattage

[Watts]

Resistance

[mΩ]

Tolerance

[%]

T.C.R

[ppm/°C]

Rated Ambient

Temperature

Operating

Temperature

Range

R ≥ 0.010Ω: ±50

R < 0.010Ω: ±100

R < 0.010Ω: ±100

R ≥ 0.010Ω: ±50

R ≤ 0.001Ω: ±200

R > 0.001Ω: ±100

R < 0.010Ω: ±100

R ≥ 0.010Ω: ±50

-55°C to +155°C

73M1A

1

1 - 50

±1

+70°C

+70°C

-55°C to +155°C

73M2A

2

1 - 75

±1

±50

-55°C to +155°C

+70°C

-55°C to +155°C

+70°C

+70°C

-55°C to +155°C

73M3A

3

73M3B

3

73M5

5

0.25 - 3

4 - 100

1 - 120

±1

±1

±1

RECOMMENDED LAND PATTERN

Type

Dimensions

[mm]

Resistance

[mΩ]

A

B

C

73M1A

2.1

1.4

1.6

---

73M2A

3.7

2.8

1.9

1.0 - 4.0

2.0

3.5

4.1 - 75

73M3A

7.1

3.8

1.4

0.25 - 1.5

3.4

2.2

2.0

3.2

2.6

2.5

2.9

3.2

3.0

73M3B

7.8

2.7

3.5

---

73M5

7.5

4.8

4.0

1.0 - 5.0

3.4

6.8

5.1 - 120

PACKAGE DRAWING

Dimensions

[mm]

L

W

t

c

Resistance

[mΩ]

73M1A

3.2 ±0.3

1.6 ±0.3

0.6 ±0.3

0.5 ±0.3

---

73M2A

6.3 ±0.3

3.2 ±0.3

0.8 ±0.3

1.9 ±0.3

1.0 - 4.0

0.6 ±0.3

1.1 ±0.3

4.1 - 75

73M3A

6.8 ±0.3

6.5 ±0.3

1.3 Max.

2.2 ±0.3

0.25, 0.50

1.4 Max.

1.0

1.3 Max.

1.5

1.2 Max.

1.8 ±0.3

2.0

1.6 ±0.3

2.5

1.3 ±0.3

3.0

73M3B

6.7 ±0.3

7.2 ±0.3

1.3 Max.

1.1 ±0.3

---

73M5

11.4 ±0.3

6.9 ±0.3

1.8 Max.

3.2 ±0.3

1.0 - 5.0

1.8 ±0.3

5.1 - 120

73M5 Only

NOTES

1. Terminal:

Base Metal - Copper [Cu].

Barrier Plating - Nickel [Ni].

Finish Plating – Matte Tin [Sn].