A subsidiary of

TT electronics plc

Issue C . 11.06

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com

Small Size Low Value Current Sense

Surface Mount Chip Resistors

0402, 0603 and 0805 sizes (larger sizes refer to our LRF Series)

Resistance R020 (20m ) to 1R0 (1000m )

Designed for current sensing in power electronic systems

RoHS compliant

Resistance range

ohms

Power rating @70°C

watts

TCR

ppm/°C

0.063

1(F), 5(J)

E24 preferred

-55 to +155

Resistance tolerance

%

Ambient temperature range

°C

Standard values

LRCS0402

Isolation voltage

volts

0.1

LRCS0603

LRCS0805

0.125: R02 to <R10

0.25: R10 to 1R0

R05 to 1R0

R02 to 1R0

R02 to 1R0

50V

100V

200V

±400: R05 – R10

±300: R101 – R50

±200: R501 – 1R0

±600: R02 – R05

±400: R051 – R10

±300: R101 – R50

±200: R501 – 1R0

±600: R02 – R05

±400: R051 – R10

±300: R101 – R50

±200: R501 – 1R0

D1

T

W

L

1.00 ±0.05

LRCS0402

LRCS0603

LRCS0805

D2

Nom wt. (g)

0.50 ±0.10

0.32 ±0.10

0.25 ±0.10

0.20 ±0.10

0.0007

1.60 ±0.10

0.80 ±0.10

0.45 ±0.10

0.30 ±0.20

0.30 ±0.20

0.002

2.00 ±0.15

1.25 ±0.15

0.55 ±0.10

0.30 ±0.20

0.40 ±0.25

0.005

All dimensions in mm unless stated.

Construction

A resistor element is applied to an alumina substrate. The product is adjusted to

value and protected. Marking is applied to 0603 and 0805 sizes. A wraparound

conductor is applied to join the top and bottom sides. The terminations are

electroplated with a Ni barrier layer prior to plating with a Sn finish.

Solvent Resistance

The body protection and marking are resistant to all normal industrial solvents

suitable for printed circuits.

Flammability

The resistor will not burn or emit incandescent particles under any condition of

applied temperature or overload.

Solderability

95% min coverage (MIL-STD 202F / 208H, 235C 2 secs)

Electrical Data

Physical Data

LRCS Series