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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Nexperia USA Inc. BSS138AKW-QX

Name: BSS138AKW-QX
Brand: Nexperia USA Inc.
SKU: BSS138AKW-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BSS138AKW-QX

Manufacturer:: Nexperia USA Inc.

Category:: FETs, MOSFETs

Package:: -

Datasheet:: BSS138AKW-QX.pdf

Description:: MOS DISCRETES

Quantity:: RFQ Add To RFQ list

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Inventory:1,730

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Product details

Overview

BSS138AKW-QX from Nexperia is a 60 V, 220 mA N-channel Trench MOSFET in SOT323 (SC-70) package, optimized for low-side switching with logic-level gate drive (V_GS(th) = 1.1 V typ), R_DS(on) = 2.2 Ω @ V_GS = 10 V, and AEC-Q101 qualification for automotive reliability.

For engineers reviewing the BSS138AKW-QX datasheet, BSS138AKW-QX pinout, BSS138AKW-QX application, or BSS138AKW-QX equivalent, this device serves as a compact, high-temperature (T_j = 175 °C) discrete switch for space-constrained signal routing, load control, and interface isolation in automotive and industrial PCBs.

Technical Context

This N-channel enhancement-mode MOSFET uses Trench technology to achieve low R_DS(on) and fast switching (t_r = 1 ns, t_f = 3 ns) with minimal gate charge (Q_G(tot) = 0.21–0.315 nC). Its 500 V HBM ESD rating and 6.6 mJ unclamped avalanche energy support robust operation in noisy environments.

The device operates across –55 °C to +175 °C junction temperature, with thermal resistance R_th(j-a) = 485 K/W on FR4 (single-sided copper), and supports logic-compatible drive down to V_GS = 2.5 V (R_DS(on) = 2.7 Ω typ).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Maximum drain-source blocking voltage for use in 24 V/48 V automotive and industrial power rails.
R_DS(on)	2.2 Ω @ V_GS = 10 V, I_D = 100 mA, T_j = 25 °C - Enables <100 mW conduction loss at 100 mA, suitable for low-power switching.
V_GS(th)	0.8–1.5 V - Ensures reliable turn-on with 1.8 V/3.3 V logic outputs without level-shifting circuitry.
I_D	220 mA continuous @ T_amb = 25 °C - Supports driving small relays, LEDs, or logic inputs in sensor interfaces and control modules.
Q_G(tot)	0.21–0.315 nC - Minimizes gate drive power and enables >10 MHz switching in digital load-switching applications.
T_j(max)	175 °C - Certified for under-hood automotive use and high-ambient industrial enclosures without derating penalties.
ESD Rating	500 V HBM - Eliminates need for external ESD protection in board-level I/O and communication line drivers.

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 3-pin, 1.3 mm pitch, 2.0 × 1.25 × 0.95 mm body, tin-plated leads, designed for reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	G (Gate)	Control terminal accepting logic-level input; requires ≤0.315 nC charge for full turn-on; sensitive to ESD but protected internally.
2	S (Source)	Reference node for gate drive and current return path; tied to system ground in low-side configurations.
3	D (Drain)	High-side connection to load; thermally coupled to PCB pad (1 cm²) to sustain 310 mW dissipation at 25 °C ambient.

Key Features

Feature	Design Value
Logic-level gate drive	V_GS(th) ≤ 1.5 V ensures compatibility with 1.8 V and 3.3 V microcontrollers without external level shifters.
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces.
Trench MOSFET architecture	Delivers 2.2 Ω R_DS(on) in SC-70 footprint-30% lower than planar equivalents at same current rating.
Integrated ESD protection	500 V HBM rating eliminates need for discrete TVS diodes on gate lines in cost-sensitive consumer and industrial designs.
Extended thermal range	Full functionality from –55 °C to +175 °C enables deployment in under-dash, powertrain, and motor-control modules.

Applications

Relay Driver

High-Speed Line Driver

Use Scenario: Driving 12 V/24 V automotive relay coils in body control modules.

IC Role / Device Role / Timing Role: Low-side switch controlling coil energization/de-energization with <100 ns switching transitions.

Use Value: 2.2 Ω R_DS(on) limits coil drive loss to <24 mW at 100 mA, reducing thermal stress on PCB traces.

Use Scenario: Transmitting TTL/CMOS signals across noisy industrial backplanes.

IC Role / Device Role / Timing Role: Digital buffer isolating MCU GPIO from long trace capacitance and EMI coupling.

Use Value: 1 ns rise time and 500 V HBM ESD rating maintain signal integrity without external clamping diodes.

Low-Side Load Switch

Switching Circuit

Use Scenario: Enabling/disabling power to sensors or actuators in battery-powered telematics units.

IC Role / Device Role / Timing Role: Power-path FET controlled by PMIC or MCU GPIO to manage system sleep/wake states.

Use Value: 1 µA gate leakage at 25 °C ensures <1 µA standby current, extending battery life in always-on monitoring systems.

Use Scenario: Building compact DC-DC converter synchronous rectifiers or LED dimming circuits.

IC Role / Device Role / Timing Role: Fast-switching power element in buck topology or PWM-controlled lighting loads.

Use Value: 0.21 nC Q_G(tot) reduces gate driver losses and enables >5 MHz PWM operation in space-constrained modules.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel low-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2004K-7	R_DS(on) = 2.5 Ω @ V_GS = 4.5 V; no AEC-Q101 qualification; SOT23-3 package.	Lower thermal performance (R_th(j-a) ≈ 600 K/W); unsuitable for under-hood automotive use.	Select when AEC-Q101 is not required and cost is prioritized over thermal margin.
FDV303N	V_GS(th) = 1.0–2.0 V; R_DS(on) = 3.1 Ω @ V_GS = 4.5 V; no integrated ESD protection.	Requires external ESD diode for I/O protection; higher R_DS(on) increases conduction loss by ~40%.	Choose only if legacy design reuse mandates identical footprint and no new qualification testing is possible.

Compared with DMN2004K-7 and FDV303N, BSS138AKW-QX delivers superior thermal capability (175 °C T_j), guaranteed ESD robustness, and tighter V_GS(th) distribution-critical for deterministic turn-on in safety-relevant automotive subsystems.

Availability

BSS138AKW-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable equipment requiring stable component supply with AEC-Q101 compliance and extended temperature operation.

Supply support for BSS138AKW-QX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

The BSS138AKW-QX belongs to Nexperia's AEC-Q101-qualified TrenchMOS portfolio, engineered specifically for space-efficient, thermally robust low-side switching in automotive and industrial control systems.

FAQ

Is BSS138AKW-QX suitable for 1.8 V logic-level drive?

Yes. With V_GS(th) ranging from 0.8 V to 1.5 V and R_DS(on) = 3.4–12 Ω at V_GS = 2.5 V, it reliably turns on using 1.8 V microcontroller outputs. At 100 mA load, conduction loss remains below 120 mW even at elevated temperatures.

What is the maximum continuous drain current at 100 °C ambient?

The datasheet specifies I_D = 160 mA at T_amb = 100 °C with standard FR4 mounting. This is derived from thermal derating curves (Fig. 2) and accounts for R_th(j-a) = 485 K/W and P_tot = 270 mW at that temperature.

Does BSS138AKW-QX include body diode recovery specifications?

Yes. The source-drain diode has t_rr = 7 ns and Q_r = 1 nC under specified conditions (I_S = 210 mA, dI_S/dt = −100 A/µs, V_DS = 30 V), enabling use in flyback snubbing and bidirectional signal clamping.

Can BSS138AKW-QX replace BSS138 in existing designs?

Yes-with caveats. BSS138AKW-QX offers identical pinout and electrical specs but adds AEC-Q101 qualification, 175 °C T_j, and enhanced ESD protection. No layout changes are needed, though validation per automotive requirements is recommended for new deployments.

BSS138AKW-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

Current - Continuous Drain (Id) @ 25°C:: -

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

BSS138AKW-QX FAQ

1.How can I place an order for BSS138AKW-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BSS138AKW-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BSS138AKW-QX reliable?

The price and inventory of BSS138AKW-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BSS138AKW-QX is usually 5 days.

3.What payment methods are accepted for BSS138AKW-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BSS138AKW-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BSS138AKW-QX?

BSS138AKW-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BSS138AKW-QX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BSS138AKW-QX?

For technical support, including BSS138AKW-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BSS138AKW-QX requirements.

6.How does Aetrix verify that BSS138AKW-QX is sourced from the original manufacturer or authorized distributors?

All BSS138AKW-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BSS138AKW-QX meets industry standards.

7.What is the process for return or replacement of BSS138AKW-QX?

All BSS138AKW-QX units undergo pre-shipment inspection (PSI). If there is an issue with BSS138AKW-QX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BSS138AKW-QX part is unused and in its original packaging.

Return procedure for BSS138AKW-QX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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