Current Sense Resistor Datasheet

© 2024 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: GD. 10/29/24

5

Two-Terminal Surface Mount Resistor

WPA/B/C Series

Test

Procedure

Specifications

ESD

HBM, 100pF, 1.5k ohms Repetition: 5 times

Component Classification: 5C (25KV)

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Load Life (Operational Life)

Test Temperature: 125°C

Applied voltage: rated power (derated Power will

be required if temp exceeds the derating point of

part)

Test Period: 1,000 hours (condition D)

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Biased Humidity

Test conditions: 85°C and 85% RH 10% of rated

power

Test Period 1,000 hours

±1.0% Appearance: Without distinct damage,

and the marking shall be legible.

Temp. Cycling (Thermal Shock)

Repeat 1,000 cycles as follows:

-55°C for 30 minutes 125°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 (Storage)

Test Temp 125°C

Test Period: 1,000 hours No Electrical Load

±1.0% Appearance: Without distinct damage,

and the marking shall be legible.

Resistance to soldering heat

Condition B (Solder dip, no pre-heat) 260°C

±1.0% Parts must meet initial electrical specs.

Resistance to Solvents

3 minute soak 2-3 ounce force

10 strokes/repetition

3 repetitions

Appearance: Without distinct damage, and the

marking shall be legible.

Terminal Strength (SMD)

Applied force based on part size

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Flammability

UL-94

V-0 or V-1 are acceptable

Electrical test not required

V-0 burning less than 10 seconds or

V-1 burning less than 30 seconds

Flame Retardance

Mounted parts subjected to voltages from 9.0 to

32 VDC (current clamped up to 500A)

No Flame when full automotive battery

potential is applied.

Vibration

Frequency: 10-2,000 Hz Acceleration: 5G

Test duration: 20 minutes, 12 cycles

±1.0% Appearance: Without distinct damage, and

the marking shall be legible.

Mechanical Shock

Force: 100G peak Test duration: 6 ms Half-sine

waveform Velocity: 12.3ft/sec

±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: 5 seconds at 245°C

A new solder shall cover minimum of 95%.

Reliability Specifications