Current Sense Resistor Datasheet

© 2023 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: BA.03/17/23

3

Two-Terminal Surface Mount Resistor

WLTC Series

Test

Procedure

Specifications

Short Term Overload

2.5 times the rated voltage shall be applied for 5

sec.

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Load Life (Operational Life)

At temperature 70°C, rated power shall be

repeatedly applied for 1.5hrs followed by a pause of

30 min. 1,000 Hours

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Low Temp. Exposure

Test Temp -55°C

Test Period: 1,000 hours No Electrical Load

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Temp. Cycling (Thermal Shock)

Repeat 100 cycles as follows:

-55°C for 30 minutes 155°C for 30 minutes

Transition time of 1 minute max

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

High Temp. Exposure

Test Temp 155°C

Test Period: 1,000 hours No Electrical Load

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Moisture Load Life

At temperature 60°C / 95%RH, rated power shall

be repeatedly applied for 1.5hrs followed by a

pause of 30 min.1,000 Hours

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Resistance to soldering heat

Reflow soldering as per JEDEC-J-STD-020. Repeat

for a total of 3 cycles.

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Board Flex

90 mm span between fulcrums 2 mm bend 60

seconds minimum holding time

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Solderability

Non-activated flux dip: 5-10 seconds SAC solder

dip: 3 seconds at 245°C

A new solder shall cover minimum of 95%

Reliability Specifications