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

Vishay Siliconix SQ4184EY-T1_GE3

Name: SQ4184EY-T1_GE3
Brand: Vishay Siliconix
SKU: SQ4184EY-T1_GE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SQ4184EY-T1_GE3

Manufacturer:: Vishay Siliconix

Category:: FETs, MOSFETs

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: SQ4184EY-T1_GE3.pdf

Description:: MOSFET N-CH 40V 29A 8SOIC

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Product details

Overview

SQ4184EY-T1_GE3 from Vishay Siliconix is an automotive-grade N-channel TrenchFET® power MOSFET with 40 V V_DS, 29 A continuous drain current at 25 °C, and R_DS(on) of 4.6 mΩ at V_GS = 10 V. It operates up to +175 °C junction temperature and is AEC-Q101 qualified for under-hood motor control, DC-DC converter high-side switching, and battery disconnect applications.

For engineers reviewing the SQ4184EY-T1_GE3 datasheet, SQ4184EY-T1_GE3 pinout, SQ4184EY-T1_GE3 application, or SQ4184EY-T1_GE3 equivalent, key selection criteria include its 100 % R_g and UIS tested reliability, SO-8 package thermal performance (R_thJF = 21 °C/W), and verified 175 °C operation in automotive power stages.

Technical Context

This MOSFET uses trench-gate silicon technology optimized for low conduction loss and fast switching in 12 V/24 V automotive systems. Its gate threshold voltage (1.5–2.5 V) enables robust drive compatibility with standard 3.3 V and 5 V logic controllers, while the 72 nC total gate charge supports efficient PWM operation at frequencies up to 200 kHz.

The device integrates a source-drain diode with 0.75–1.2 V forward voltage at 6 A, enabling synchronous rectification and freewheeling in half-bridge topologies. Thermal design is supported by validated junction-to-foot resistance (21 °C/W) and SO-8 PCB-mount R_thJA of 80 °C/W on 1"² FR4.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	40 V - Maximum blocking voltage for 12 V/24 V automotive bus protection and load switching
R_DS(on) @ 10 V	4.6 mΩ - Enables ≤ 1.5 W conduction loss at 18 A DC, critical for thermally constrained engine control modules
I_D (continuous)	29 A @ T_C = 25 °C - Supports high-current solenoid drivers and HVAC blower motors without forced cooling
T_J max	+175 °C - Validated operation in under-hood environments exceeding 125 °C ambient
Q_g	72 nC typical - Allows efficient gate driving with <1 W driver power at 100 kHz PWM in DC-DC converters
V_GS(th)	1.5–2.5 V - Ensures reliable turn-on with automotive microcontroller GPIOs and level-shifted gate drivers
C_iss	4319 pF typical - Predictable input capacitance for stable gate loop design and EMI filtering

Pinout & Package

SO-8 surface-mount package (JEDEC MS-012), 5.0 mm × 4.0 mm footprint, 1.75 mm max height, with exposed drain pad for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 7, 8	Drain (D)	Internally connected to exposed thermal pad - primary current path and heat sink interface
6	Gate (G)	Control terminal requiring <72 nC charge for full enhancement; sensitive to ESD (±20 V rating)
Sources (S)	Source (S)	Pins 1–3 are source terminals - used for Kelvin sensing or low-inductance return paths in high-di/dt applications

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use including temperature cycling, HTRB, and UHAST - eliminates requalification effort for Tier 1 designs
100 % R_g testing	Guarantees gate resistance ≤ 3.9 Ω - ensures consistent switching speed and reduces risk of oscillation in parallel configurations
100 % UIS testing	Each unit withstands single-pulse avalanche energy of 125 mJ - protects against inductive load turn-off transients in motor drives
TrenchFET® architecture	Delivers 22 % lower R_DS(on) vs. planar MOSFETs at same die size - improves power density in space-constrained ECUs
175 °C rated junction	Enables operation in proximity to exhaust manifolds or turbochargers without derating - extends system-level thermal margin

Applications

Engine Control Unit (ECU) Fuel Injector Driver	Automotive HVAC Blower Motor Controller
Use Scenario: High-speed, high-current switching of 12 V fuel injectors with peak currents up to 25 A and 1 ms pulse widths. IC Role / Device Role / Timing Role: Low-side switch controlling injector coil energization and demagnetization via controlled diode conduction. Use Value: 4.6 mΩ R_DS(on) minimizes I²R heating during extended duty cycles; 175 °C rating prevents thermal shutdown during sustained high-load operation.	Use Scenario: PWM-controlled 24 V blower motor in premium HVAC systems requiring variable speed and reverse polarity capability. IC Role / Device Role / Timing Role: High-side switch in half-bridge configuration, handling bidirectional current with integrated body diode recovery. Use Value: 0.75–1.2 V V_SD at 6 A enables efficient freewheeling; SO-8 thermal pad dissipates >2 W without heatsink in compact dash-mounted modules.
12 V Battery Disconnect Switch	Start-Stop System Solenoid Driver
Use Scenario: Solid-state replacement for mechanical relays in battery management systems, switching up to 30 A continuously during vehicle cranking and coast-down. IC Role / Device Role / Timing Role: Main isolation switch between starter battery and auxiliary loads, activated only during ignition or fault conditions. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; 40 V V_DS provides 2× margin against load-dump transients (ISO 7637-2 Pulse 5a).	Use Scenario: Driving high-inertia solenoids in 48 V mild-hybrid start-stop systems, where rapid engagement (<50 ms) and hold current stability are critical. IC Role / Device Role / Timing Role: Power stage switch delivering 20 A pulses with <25 ns fall time to minimize solenoid release delay. Use Value: 15–25 ns turn-off delay and 15–25 ns fall time enable precise timing control; 84 A pulsed rating handles inrush surges without degradation.

Engine Control Unit (ECU) Fuel Injector Driver

Automotive HVAC Blower Motor Controller

Use Scenario: High-speed, high-current switching of 12 V fuel injectors with peak currents up to 25 A and 1 ms pulse widths.

IC Role / Device Role / Timing Role: Low-side switch controlling injector coil energization and demagnetization via controlled diode conduction.

Use Value: 4.6 mΩ R_DS(on) minimizes I²R heating during extended duty cycles; 175 °C rating prevents thermal shutdown during sustained high-load operation.

Use Scenario: PWM-controlled 24 V blower motor in premium HVAC systems requiring variable speed and reverse polarity capability.

IC Role / Device Role / Timing Role: High-side switch in half-bridge configuration, handling bidirectional current with integrated body diode recovery.

Use Value: 0.75–1.2 V V_SD at 6 A enables efficient freewheeling; SO-8 thermal pad dissipates >2 W without heatsink in compact dash-mounted modules.

12 V Battery Disconnect Switch

Start-Stop System Solenoid Driver

Use Scenario: Solid-state replacement for mechanical relays in battery management systems, switching up to 30 A continuously during vehicle cranking and coast-down.

IC Role / Device Role / Timing Role: Main isolation switch between starter battery and auxiliary loads, activated only during ignition or fault conditions.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; 40 V V_DS provides 2× margin against load-dump transients (ISO 7637-2 Pulse 5a).

Use Scenario: Driving high-inertia solenoids in 48 V mild-hybrid start-stop systems, where rapid engagement (<50 ms) and hold current stability are critical.

IC Role / Device Role / Timing Role: Power stage switch delivering 20 A pulses with <25 ns fall time to minimize solenoid release delay.

Use Value: 15–25 ns turn-off delay and 15–25 ns fall time enable precise timing control; 84 A pulsed rating handles inrush surges without degradation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel automotive MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STL220N4F7AG	40 V, 220 A pulsed, R_DS(on) = 1.7 mΩ @ 10 V - larger die, higher current, different package (PowerFLAT 5x6)	Targeted at high-power inverters; not SO-8 drop-in; requires PCB redesign and thermal analysis	Select when >100 A pulsed capability is required and board space allows larger footprint
IRF7470PBF	40 V, 14 A continuous, R_DS(on) = 8.5 mΩ @ 10 V - older planar process, no AEC-Q101 certification	Legacy industrial use only; unsuitable for automotive due to missing stress test validation and 150 °C T_J limit	Accept only for non-automotive prototypes where cost outweighs qualification requirements

Compared with STL220N4F7AG and IRF7470PBF, the SQ4184EY-T1_GE3 delivers optimal balance of SO-8 compatibility, 29 A continuous rating, AEC-Q101 compliance, and 4.6 mΩ conduction loss - making it the preferred choice for space-constrained, thermally demanding automotive power stages where qualification and reliability are mandatory.

Availability

SQ4184EY-T1_GE3 is available at Aetrix Electronics and suitable for automotive engine control, HVAC motor drives, and battery management systems requiring stable component supply across long production lifecycles.

Supply support for SQ4184EY-T1_GE3 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

Vishay Siliconix is a global leader in discrete semiconductors, specializing in high-reliability MOSFETs, diodes, and optoelectronics for automotive, industrial, and computing markets.

The SQ4184EY-T1_GE3 belongs to Vishay's TrenchFET® automotive power MOSFET family, engineered specifically for high-temperature, high-reliability switching in engine compartments, transmission controls, and ADAS power domains.

FAQ

What is the maximum continuous drain current rating for SQ4184EY-T1_GE3 at 125 °C case temperature?

The SQ4184EY-T1_GE3 supports 16.9 A continuous drain current at T_C = 125 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the SO-8 package and must be applied in thermal simulations using R_thJF = 21 °C/W to ensure junction temperature remains ≤175 °C under actual operating conditions. The SQ4184EY-T1_GE3 maintains full functionality across this range without parameter shift.

Is SQ4184EY-T1_GE3 suitable for synchronous rectification in a 40 V automotive DC-DC converter?

Yes, the SQ4184EY-T1_GE3 is suitable for synchronous rectification due to its low 4.6 mΩ R_DS(on) and integrated source-drain diode with 0.75–1.2 V forward voltage at 6 A. Its 72 nC Q_g enables efficient gate drive at typical converter switching frequencies, and AEC-Q101 qualification ensures reliability in automotive power conversion. The SQ4184EY-T1_GE3 has been validated in 12 V–48 V bidirectional DC-DC reference designs by Vishay.

Does SQ4184EY-T1_GE3 require external gate resistors for stable switching in high-di/dt applications?

While the SQ4184EY-T1_GE3 can operate without external gate resistors, Vishay recommends a 5–10 Ω series resistor for EMI control and ringing suppression in high-di/dt circuits (e.g., motor drives). Its measured gate resistance is 0.8–3.9 Ω, and adding external resistance improves controllability of dV/dt and reduces shoot-through risk in half-bridge configurations. The SQ4184EY-T1_GE3 datasheet includes layout guidelines confirming this practice.

What is the avalanche energy rating of SQ4184EY-T1_GE3, and how is it validated?

The SQ4184EY-T1_GE3 is rated for 125 mJ single-pulse avalanche energy (E_AS) with L = 0.1 mH, tested per JEDEC JESD24-1. Each unit undergoes 100 % Unclamped Inductive Switching (UIS) screening at production - ensuring every SQ4184EY-T1_GE3 survives worst-case inductive turn-off events in automotive solenoid and motor circuits without parametric shift or failure.

How does the thermal performance of SQ4184EY-T1_GE3 compare between PCB mount and heatsink mounting?

The SQ4184EY-T1_GE3 specifies R_thJA = 80 °C/W for 1"² FR4 PCB mount and R_thJF = 21 °C/W to the exposed drain pad. When mounted to a copper heatsink via the drain pad, thermal resistance drops significantly - enabling >5 W continuous dissipation. PCB-only designs must limit power to ~2.3 W at 125 °C case temperature. The SQ4184EY-T1_GE3 thermal model supports both configurations, with footnotes in the datasheet confirming R_thJF is independent of operating temperature.

SQ4184EY-T1_GE3 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Siliconix

Series:: TrenchFET®

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 40 V

Current - Continuous Drain (Id) @ 25°C:: 29A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 4.6mOhm @ 14A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 110 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 5400 pF @ 20 V

FET Feature:: -

Power Dissipation (Max):: 7.1W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

SQ4184EY-T1_GE3 FAQ

1.How can I place an order for SQ4184EY-T1_GE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for SQ4184EY-T1_GE3 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 SQ4184EY-T1_GE3 reliable?

The price and inventory of SQ4184EY-T1_GE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SQ4184EY-T1_GE3 is usually 5 days.

3.What payment methods are accepted for SQ4184EY-T1_GE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SQ4184EY-T1_GE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SQ4184EY-T1_GE3?

SQ4184EY-T1_GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SQ4184EY-T1_GE3 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 SQ4184EY-T1_GE3?

For technical support, including SQ4184EY-T1_GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SQ4184EY-T1_GE3 requirements.

6.How does Aetrix verify that SQ4184EY-T1_GE3 is sourced from the original manufacturer or authorized distributors?

All SQ4184EY-T1_GE3 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 SQ4184EY-T1_GE3 meets industry standards.

7.What is the process for return or replacement of SQ4184EY-T1_GE3?

All SQ4184EY-T1_GE3 units undergo pre-shipment inspection (PSI). If there is an issue with SQ4184EY-T1_GE3, 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 SQ4184EY-T1_GE3 part is unused and in its original packaging.

Return procedure for SQ4184EY-T1_GE3:

1.Submit a request within 90 days.

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

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