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Infineon Technologies BTS40K21ENCXUMA1 — Power Management (PMIC / Gate Driver)

BTS40K21ENCXUMA1 Infineon PROFET High-Side Switch, 200 mOhm

MPNBTS40K21ENCXUMA1
Active

Infineon PROFET BTS40K21ENCXUMA1, Automotive AEC-Q100, single N-channel high-side switch, 200 mOhm Rds(on) typ, 1.5 A max output, 5 V to 36 V load range, 8-pin DSO package.

$2.1200Ref. price · indicative, final on quote
Infineon Technologies BTS40K21ENCXUMA1 datasheet (PDF)
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100, PROFET®
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BTS40K21ENCXUMA1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100, PROFET®
Output typeN-Channel
TypeGeneral Purpose
Voltage - load5V ~ 36V
Voltage - supply (Vcc (Vdd))Not Required
Output current1.5A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C ~ 150°C (TJ)
PackageTape & Reel (TR) Cut Tape (CT)
Rds on200mOhm
Fault protectionCurrent Limiting, Open Load Detect, Over Temperature, Over Voltage, UVLO
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

Typical on-resistance is 200 mOhm. At the 1.5 A maximum continuous output, the I²R conduction loss is 0.45 W.

The part does not require a separate Vcc supply — the gate drive is self-supplied from the load pin, simplifying the PCB layout to a single power rail.

Fault protection set — five monitored conditions

The BTS40K21ENCXUMA1 integrates current limiting, open load detection, over-temperature shutdown, over-voltage clamp, and under-voltage lockout. Open load detect is particularly useful for lamp or solenoid diagnostics in body-control modules — it reports a disconnected load without a separate sense resistor.

AEC-Q100 qualification — under-hood temperature grade

The part is listed under the Automotive, AEC-Q100 series.

Frequently asked questions

What is the Rds(on) of BTS40K21ENCXUMA1?

Typical on-resistance is 200 mOhm. This is the value at 25°C junction; expect the resistance to increase by roughly 50% at 150°C junction per the normalised curve in the datasheet.

Is BTS40K21ENCXUMA1 AEC-Q100 qualified?

The 150°C junction rating supports Grade 0 or Grade 1 applications.

Can BTS40K21ENCXUMA1 handle 24V systems?

Yes. The load voltage range is 5 V to 36 V, which covers nominal 24 V truck or bus electrical systems with margin for load-dump transients.

When sourcing BTS40K21ENCXUMA1, what is the closest functional alternative?

The BTS142DATMA1 is a low-side switch from the HITFET series with a 23 mOhm Rds(on) and 4.6 A output — it is not a pin-compatible second source. For a high-side replacement, stay within the PROFET family; the BTS40K21ENCXUMA1 is the only PROFET single-channel high-side switch at this Rds(on) level in the 8-pin DSO package.