FDS8949 vs FDS8958B

This in-depth comparison of the FDS8949 and FDS8958B provides valuable insights into their specifications and key features. We cover important factors in detail, including RoHS compliance, REACH status, series, mounting style, package type, and other relevant characteristics. Presenting the differences side by side simplifies component selection, making it easier for you to select the best option for your specific application.

Technical review by ETEI Component Engineering Source: manufacturer documentation

Parts at a glance

Part A

FDS8949

Fairchild Semiconductor

Lifecycle: Active
Stock: 6681 PCS
Package: SOIC-8
Series: Transistors - FETs, MOSFETs - Arrays

+BOM RFQ

Part B

FDS8958B

onsemi

Lifecycle: Active
Stock: 2336 PCS
Package: SOIC-8
Series: Transistors - FETs, MOSFETs - Arrays

+BOM RFQ

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Full specification comparison

Use manufacturer datasheets as the final authority.

Specification	FDS8949	FDS8958B
Series	PowerTrench®	PowerTrench®
Part Status	Active	Active
FET Type	2 N-Channel (Dual)	N and P-Channel
FET Feature	Logic Level Gate	Logic Level Gate
Drain to Source Voltage (Vdss)	40V	30V
Current - Continuous Drain(Id) @ 25°C	6A	6.4A, 4.5A
Rds On(Max) @ Id Vgs	29mOhm @ 6A, 10V	26mOhm @ 6.4A, 10V
Vgs(th)(Max) @ Id	3V @ 250µA	3V @ 250µA
Gate Charge(Qg)(Max) @ Vgs	11nC @ 5V	12nC @ 10V
Input Capacitance(Ciss)(Max) @ Vds	955pF @ 20V	540pF @ 15V
Power - Max	2W	900mW
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount

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