CSD18503Q5A The CSD18503Q5A is a 40V N-Channel NexFET power MOSFET from Texas Instruments. It features a low 4.3mOhm on-resistance and supports up to 100A continuous drain current at 25°C.
Mfr Part #:

CSD18503Q5A

Available from 5 distributors
Mfr Name: Texas Instruments
Texas Instruments
The CSD18503Q5A is a 40V N-Channel NexFET power MOSFET from Texas Instruments. It features a low 4.3mOhm on-resistance and supports up to 100A continuous drain current at 25°C.
✓ Total Stock: 13,991 pcs
$ Price Range: $0.66 - $2.29

CSD18503Q5A Available from 5 distributors

✓ Authorised
✓ Non-Authorised

CSD18503Q5A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Current
Drain to Source Voltage (Vdss)
Drive Voltage (Max Rds On, Min Rds On)
FET Type
Gate Charge (Qg) (Max) @ Vgs
Halogen Free
Input Capacitance (Ciss) (Max) @ Vds
Lead Style
Mounting Type
Operating Temperature
Power Dissipation (Max)
Rds On (Max) @ Id, Vgs
Supplier Device Package
Tape & Reel
Technology
Termination Style
Vgs (Max)
Vgs(th) (Max) @ Id

CSD18503Q5A Description

Short technical summary and product information.

The CSD18503Q5A is a 40V N-Channel NexFET power MOSFET from Texas Instruments, designed to minimize losses in power conversion applications. It features ultra-low gate charge (Qg typ 26nC at 10V) and gate-to-drain charge (Qgd typ 4.3nC), enabling high-efficiency switching.

 

With a maximum drain-to-source on-resistance of 4.3mOhm at VGS=10V and 6.2mOhm at VGS=4.5V, this device is suitable for high-current applications. It supports continuous drain current up to 100A (package limited) at TC=25°C and 19A at TA=25°C, with a pulsed drain current rating of 321A.

 

The MOSFET is avalanche rated (EAS 157mJ) and offers low thermal resistance, with a maximum power dissipation of 120W at TC=25°C. It operates over a junction temperature range of -55°C to 150°C.

 

The CSD18503Q5A comes in an 8-PowerTDFN surface-mount package (also known as SON 5mm x 6mm) and is available in tape and reel packaging. It is Pb-free, halogen-free, and RoHS compliant.

CSD18503Q5A Quick Information

Product Type: Power MOSFET
Series: NexFET
Canonical Name: 40V N-Channel NexFET Power MOSFET, Single SON 5mm x 6mm, 4.3mOhm
Subcategory: Single N-Channel Power MOSFET

CSD18503Q5A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Yes

CSD18503Q5A Estimated Pricing

Qty Low High
1+ $2.29 $2.29
10+ $1.47 $1.47
100+ $0.99 $0.99
500+ $0.79 $0.79
1,000+ $0.73 $0.73
2,500+ $0.66 $0.66

Estimated market price range - modelled values for guidance only, not live distributor offers.

CSD18503Q5A Features

  • 40V drain-to-source voltage rating.
  • Ultra-low 4.3mOhm on-resistance at 10V.
  • 100A continuous drain current at 25°C.
  • Avalanche rated with 157mJ energy capability.
  • Pb-free, halogen-free, RoHS compliant.

CSD18503Q5A Applications

  • Ideal for DC-DC conversion circuits.
  • Used in secondary side synchronous rectifiers.
  • Suitable for battery motor control.
  • High-efficiency power switching applications.

CSD18503Q5A FAQs

7 frequently asked questions generated from this part’s specifications.
What is the maximum drain-to-source voltage of the CSD18503Q5A?

The maximum drain-to-source voltage (Vdss) is 40V.

What is the maximum continuous drain current at TC=25°C?

The maximum continuous drain current is 100A at TC=25°C (package limited).

What is the operating temperature range?

The operating junction temperature range is -55°C to 150°C.

What is the package type of the CSD18503Q5A?

The package is 8-PowerTDFN, also known as 8-VSONP (5x6), a surface-mount package.

Is the CSD18503Q5A RoHS compliant?

The manufacturer page states RoHS compliant, and the datasheet confirms Pb-free terminal plating and halogen-free. However, the RoHS status is unverified in the database.

What is the maximum on-resistance at VGS=10V?

The maximum on-resistance is 4.3mOhm at VGS=10V and ID=22A.

What is the maximum power dissipation at TC=25°C?

The maximum power dissipation is 120W at TC=25°C.

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