LVK25R005FER Datasheet LVK24R012FER, LVK24R020FER, LVK24R020DER | P1-P3

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LVK Series

Four Terminal High Precision Current Sense

Current sense resistors enable the measurement of current flow

in a circuit by monitoring a voltage drop across a precisely cali-

brated resistance. The LVK chip features four terminals, also

known as a “Kelvin” configuration. This configuration enables

current to be applied through two opposite terminals and a

sensing voltage to be measured across the other two terminals,

eliminating the resistance and temperature coefficient of the

terminals for a more accurate current measurement.

Isolating the voltage and current terminals (see schematic)

facilitates a very accurate current measurement. Ohmite’s pro-

prietary technology offers an excellent Temperature Coefficient

of Resistance (TCR) even for very low resistance values. The

resistive element consists of a durable, anti-corrosive metal

alloy that combines reliable performance with the ability to

withstand harsh environments.

Power Resistance Max. Over Current

Pkg. Rating Range TCR Available Max. Max.

Series Size (W @70°C) (Ω) (ppm/°C) Tolerance Values Power Current

LVK12 1206 0.5W 0.01-0.100 50ppm 0.5%, 1% E12 20W 20A

LVK20 2010 0.75W 0.01-0.05 50ppm 0.5%, 1% E12 29W 23A

LVK24 2412 1.0W 0.01-0.100 50ppm 0.5%, 1% E12 38W 27A

0.001 300ppm

LVK25 1224 2.0W 0.002-0.004 200ppm 1% 1, 2, 3, 5, 9,10mΩ 150W 200A

0.005-0.01 100ppm

Res. Range

0.001Ω - 0.010Ω

Operating Temp. Range

-40°C to +125°C

Rated Ambient Temperature

+70°C

Resistance Tolerance

0.5% and 1% standard

Temperature Coefficient

LVK12, LVK20, LVK24: 50ppm standard

LVK25: 100ppm, 200ppm, or 300ppm based on

resistance value

Coating Material

epoxy resin

Terminals

100% matte tin

Max. Over Current

Time applied: 10ms max.

Interval: 60sec min.

Max. over current = √(Max. power÷ Resistance

value) or max. current, whichever is smaller.

Storage conditions

Temperature: 5°C ~ 35°C

Humidity: 25% ~ 70%

FEATURES

•Designedforautomaticinsertion

•Industrystandardsizes

•High-precisionKelvinconnectcapability

in a small package

SERIES SPECIFICATIONS

CHARACTERISTICS

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V = sensing terminal

(voltage)

I = current terminal

Schematic

PERFORMANCE CHARACTERISTICS

Test Items Performance Requirements Test Methods / standard: JIS C 5201.1

Overload

±(0.5%+0.0005Ω) Rated voltage x 1.5 for 5s

Endurance at 70°C

±(0.5%+0.0005Ω) 70°C±3°C, Rated voltage 1.5h ON, 0.5h OFF, 1000h

Moisture

resistance

±(0.5%+0.0005Ω) 60°C±2°C, 90%~95% RH, Rated voltage 1.5h ON,

0.5h OFF, 1000h

Rapid change of

temperature

±(0.5%+0.0005Ω) -40°C (30min.)/+125°C (30min.), 5 cycles

Resistance to sol-

dering heat

±(0.5%+0.0005Ω) 260°C±5°C for 10s±1s

Substrate bending

±(0.5%+0.0005Ω) Bending width: 2mm for 10s±1s, Glass epoxy sub-

strate with thickness of 1.6mm

Solderability

95% or more of the electrode surface

shall be covered with new solder

245°C±5°C for 3s±0.5s

LVK Series

Four Terminal High Precision Current Sense

Temperature °C

Time (sec.)

Preheating

130 ~ 180℃

60 ~ 90 sec.

Heating

Peak

200

300

250

100

150

Over 220℃

30s ~ 90s

240 ~ 260℃ Max. 10s

Reflow Temperature Profile

For lead free soldering (Sn-Ag-Cu solder)

Preheating: 130° ~ 180° 60s ~ 90s

Heating: Over220° 30s~90s

Peak: 240°~260° Max.10s

Ramp-up rate: max 3°C/sec.

Time above liquidous: 60 – 150 sec.

Ramp-down rate: max 6°C/sec.

Max.numberofreflow:2

DIMENSIONS

(mm)

Size L W t a b d e f g

LVK12 (1206) 3.2 ±0.2 1.6 ±0.2 0.5 ±0.15 1.0 ±0.2 0.55 ±0.2 1.10 0.30 1.00 1.75

LVK20 (2010) 5.0 ±0.2 2.5 ±0.2 0.5 ±0.15 1.7 ±0.2 0.9 ±0.2 1.55 0.50 1.40 2.55

LVK24 (2412) 6.4 ±0.2 3.2 ±0.2 0.5 ±0.15 2.1 ±0.2 1.2 ±0.2 1.90 0.60 2.00 3.25

LVK25 (1224) 3.2 ±0.2 6.4 ±0.2 0.5 ±0.2 0.4 ±0.2 2.7 ±0.2 1.40 2.20 1.00 3.30

Layout for illustra-

tion only, part can be

rotated 180° without

effect to the circuit.

LVK 12, LVK20, LVK24 (0.5, 0.75 & 1 watt) LVK25 (2 watt)

Land Pattern

1. Electrode

2. Protection

coat

3. Almina

substrate

4. Resistor

Note that LVK25 has a

vertical orientation with the

current flow along the short

edge of the resistor.

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LVK Series

Four Terminal High Precision Current Sense

LVK12 LVK20 LVK24 LVK25

A 1.90 ±0.10 2.90 ±0.1 3.43 ±0.2 3.43 ±0.2

B 3.50 ±0.10 5.35 ±0.1 6.63 ±0.2 6.63 ±0.2

W 8.0 ±0.2 12.0 ±0.2 12.0 ±0.3 12.0 ±0.3

F 3.5 ±0.05 5.5 ±0.05 5.5 ±0.05 5.5 ±0.05

E 1.75 ±0.1 1.75 ±0.1 1.75 ±0.1 1.75 ±0.1

0 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1

1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1 4.0 ±0.1

2 2.0 ±0.05 2.0 ±0.05 2.0 ±0.05 2.0 ±0.05

0 1.5 +0.1/-0 1.5 +0.1/-0 1.5 +0.1/-0 1.5 +0.1/-0

1 1.0 +0.20/-0 1.5 +0.2/-0 1.5 +0.2/-0 1.5 +0.2/-0

T 0.2 ±0.05 0.2 ±0.05 0.2 ±0.05 0.2 ±0.05

2 1.0 ±0.2 1.0 ±0.2 1.0 ±0.2 1.0 ±0.2

LVK25R005FER

Series

Case Size

12 = 1206

20 = 2010

24 = 2412

25 = 1224

Tolerance

D=0.5%

F=1%

Ohms

R005 = 0.005

Tape & Reel

RoHS Compliant

13mm ±�0.2

60mm ±1

180mm ±3

9mm ±0.3 (LVK12)

13mm ±0.3 (LVK 20, 24, 25)

2mm ±0.5

13mm ±0.3 (LVK12)

15mm ±0.3 (LVK 20, 24, 25)

Series Qty/Reel

LVK12 5000

LVK20 1000

LVK24 1000

LVK25 1000

Standard values

LVK12 LVK20 LVK24 LVK25

1% Tolerance

0.01 0.01 0.01 0.001

 0.012  0.012 0.002

0.015 0.015 0.003

0.005

 0.02 0.02 0.02 0.01

 0.024 0.027 0.025

0.03 0.03 0.03

0.033 0.033

0.039 0.039 0.039

 0.047  0.047

0.05 0.05 0.05

 0.075  0.075

0.10 0.10

LVK12 LVK20 LVK24 LVK25

0.5% Tolerance

0.01 0.01 0.01 0.001

  0.015 0.015 0.002

 0.02 0.02 0.02 0.003

  0.025 0.025 0.005

0.03 0.03 0.03 0.010

0.033 0.033

0.039

0.05 0.05 0.05

 0.075

0.10 0.10

TAPE AND REEL

(mm)

ORDERING INFORMATION

ReelTape

Direction

of feed

rev 3/18-1

P1-P3

LVK25R005FER

Mfr. #:

Buy LVK25R005FER

Manufacturer:

Ohmite

Description:

Current Sense Resistors - SMD .005ohm 1% 4 Terminal

Lifecycle:

New from this manufacturer.

Delivery:

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LVK25R005FER

LVK25R005FER

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