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BUK9Y21-40E

The NXP Semiconductors BUK9Y21-40E is a logic level N-channel MOSFET designed for high performance automotive applications. It features a 40V drain-source voltage and a low on-state resistance of 21 mΩ.

✓ Total Stock: 10,105 pcs

$ Price Range: $2.40

BUK9Y21-40E Available from 3 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Smaxon Electronics ✓ Non-Authorised Inventory information	5,000 pcs On Request	5000 pcs	On Request	1	On Request	On Request	16+	On Request	On Request
Optech Co.,Limited ✓ Non-Authorised Inventory information	3,100 pcs On Request	3100 pcs	On Request	1	On Request	On Request	14+	On Request	On Request
Xingangxin ✓ Non-Authorised Inventory information	2,005 pcs On Request	2005 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

BUK9Y21-40E Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	NXP Semiconductors
Junction Temperature	-55 to 175 °C
Mounting Type	Surface Mount
SVHC Present	Present
Storage Temperature	-55°C ~ 175°C

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BUK9Y21-40E Description

Short technical summary and product information.

The BUK9Y21-40E from NXP Semiconductors is a logic level N-channel MOSFET utilizing TrenchMOS technology, packaged in an LFPAK56 (Power SO8) format. This component is designed and qualified to AEC Q101 standards, making it suitable for high-performance automotive applications.

Key electrical characteristics include a drain-source voltage rating of 40 V and a low drain-source on-state resistance (RDSon) of 21 mΩ at typical operating conditions (VGS = 5 V, ID = 10 A, Tj = 25 °C). The MOSFET also offers a true logic level gate with a VGS(th) rating greater than 0.5 V at 175 °C, and is rated for a junction temperature up to 175 °C, making it suitable for thermally demanding environments.

Applications for the BUK9Y21-40E include 12 V automotive systems, motor control, lamp control, solenoid control, transmission control, and ultra-high-performance power switching. Its repetitive avalanche rating further enhances its suitability for robust applications.

BUK9Y21-40E Quick Information

Product Type: MOSFET

Series: BUK9Y

Canonical Name: N-channel 40 V, 21 mΩ logic level MOSFET

Subcategory: N-Channel

BUK9Y21-40E Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

BUK9Y21-40E Estimated Pricing

Qty	Low	High
1+	$2.40	$2.40

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

BUK9Y21-40E Features

AEC Q101 compliant for automotive use.
40 V drain-source voltage rating.
Low 21 mΩ on-state resistance.
Suitable for high temperature environments.
Logic level gate for easy interfacing.

BUK9Y21-40E Applications

Used in 12 V automotive systems.
Ideal for motor control applications.
Suitable for lamp and solenoid control.
Applicable to transmission control systems.
Designed for power switching tasks.

BUK9Y21-40E FAQs

7 frequently asked questions generated from this part’s specifications.

What is the maximum drain-source voltage?

40V.

What is the maximum drain current?

33A at 25°C case temperature.

What is the on-state resistance?

Typical 18.1mΩ, maximum 21mΩ at VGS=5V, ID=10A.

What is the operating junction temperature range?

-55°C to 175°C.

What is the package type?

LFPAK56 (Power-SO8).

What is the total power dissipation?

45W at 25°C case temperature.

What is the gate-drain charge?

Typical 2.7nC.