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Texas Instruments CSD18512Q5B

CSD18512Q5B NexFET N-Channel MOSFET, 40 V, 211 A, 1.6 mOhm

MPNCSD18512Q5B
End of Life

Texas Instruments NexFET N-Channel MOSFET, CSD18512Q5B, 40 V Vds, 211 A continuous drain, 1.6 mOhm Rds(on) at 10 V, 8-VSON-CLIP (5x6) package, -55°C to 150°C junction.

$1.9Ref. price · indicative, final on quote
Texas Instruments CSD18512Q5B datasheet (PDF)
Packaging8-PowerTDFN
RoHSROHS3 Compliant
SeriesNexFET™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CSD18512Q5B specifications
ParameterValue
SeriesNexFET™
FET typeN-Channel
MountingSurface Mount
Drain to source voltage40 V
Drive voltage (Max rds on, min rds on)4.5V, 10V
Current - continuous drain (Id) @ 25°C211A (Tc)
Power dissipation139W (Tc)
Operating temperature-55°C ~ 150°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Vgs±20V
TechnologyMOSFET (Metal Oxide)
Case8-PowerTDFN
Vgs(th) (Max) @ id2.2V @ 250µA
Rds on (Max) @ id, vgs1.6mOhm @ 30A, 10V
Input capacitance (Ciss) (Max) @ vds7120 pF @ 20 V

Product details

Gate drive voltage and switching

At 5 V gate drive the on-resistance rises, but the 7120 pF input capacitance at 20 V drain means the gate driver must source enough peak current to charge Ciss within the target switching period — a 2 A driver can switch it in under 50 ns. The ±20 V Vgs max gives headroom for 12 V gate drive in automotive pre-driver circuits.

The 2.2 V gate threshold at 250 µA means the MOSFET is fully off below 2 V, but the threshold shifts with temperature; at -55 °C it rises, so a 5 V gate drive is the safe minimum for cold starts.

Frequently asked questions

What is the closest pin-compatible alternative to the CSD18512Q5B?

The CSD18510Q5B is a same-family NexFET in the same 8-VSON-CLIP package, but its Rds(on) and current rating differ — confirm the parametric match against your load current and switching frequency before substituting.

Is the CSD18512Q5B compatible with 5 V gate drive?

Yes — the drive voltage range includes 4.5 V, so 5 V logic-level gate drive works. At 5 V the on-resistance is higher than at 10 V; check the typical Rds(on) curve in the datasheet for your operating current.