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WW12DR040FTL AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

WW12DR040FTL product

WW12DR040FTL

Current Sense Resistors

40 mΩCurrent sense1206 resistor1 WMetal foil

WW12DR040FTL is a 40 mΩ, ±1% metal-foil current-sense resistor in a 1206 package, rated at 1 W and 5 A at 70 °C.

Best for

  • Low-side or power-path current measurement
  • Compact power conversion and battery charger designs

Avoid if

  • The design requires a different resistance value or package size

Check before use

  • Continuous and RMS current
  • Temperature derating and PCB heat spreading
  • Kelvin measurement requirements

Key specifications

Resistance
40 mΩ
Tolerance
±1%
Package
1206 (3216 metric)
Power rating
1 W at 70 °C
TCR
±70 ppm/°C

Compliance & Environment

RoHS
Compliant
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Power supply current sensingBattery chargersDC-DC converters

Datasheet

aeb88d439ab68beaa6371a3a394ce392_WW12DR040FTL.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for WW12DR040FTL: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

It is a Walsin 40 mΩ ±1% metal-foil low-ohm power chip resistor for current sensing. The part uses a 1206 (3216 metric) package and is rated for 1 W at 70 °C.