Vishay Siliconix SQJ146EP-T1_GE3

Overview

SQJ146EP-T1_GE3 from Vishay Siliconix is an automotive-grade N-channel TrenchFET® Gen IV MOSFET rated for 40 V (D–S), 75 A continuous drain current at 25 °C, and 175 °C junction operation, with R_DS(on) = 7.0 mΩ at V_GS = 10 V - used in high-efficiency DC–DC converters and motor control stages in engine management and battery systems.

For engineers reviewing the SQJ146EP-T1_GE3 datasheet, SQJ146EP-T1_GE3 pinout, SQJ146EP-T1_GE3 application, or SQJ146EP-T1_GE3 equivalent, key selection criteria include its AEC-Q101 qualification, Q_gd/Q_gs ratio < 1 for optimized switching, 100 % R_g and UIS testing, and PowerPAK SO-8L package thermal performance (R_thJC = 2 °C/W).

Technical Context

This MOSFET employs a trench-based silicon structure enabling low on-resistance and fast switching with controlled gate charge distribution: Q_g = 18–27 nC, Q_gd = 5 nC, and Q_gs = 6 nC at V_DS = 20 V, ID = 10 A. Its body diode exhibits t_rr = 21–32 ns and Q_rr = 8–12 nC under IF = 10 A, di/dt = 100 A/μs conditions.

The device operates across –55 °C to +175 °C junction temperature range and supports robust avalanche energy handling (E_AS = 17 mJ) and pulsed current capability (I_DM = 200 A). Thermal design leverages R_thJC = 2 °C/W to the exposed drain pad and R_thJA = 70 °C/W on 1"² FR4 PCB.

Key Specifications

Pinout & Package

Package: PowerPAK® SO-8L (PPKSO8LWLA), leadless surface-mount with exposed drain pad (pins 1, 2, 3, and 7 are source; pin 4 is gate; pins 5 and 6 are drain; pin 8 is source), dimensions 6.15 mm × 4.90 mm × 1.05 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 40 V automotive MOSFET applications.

Compared with IRF1404ZPbF and STL220N4F7AG, SQJ146EP-T1_GE3 balances low R_DS(on), fast switching (Q_gd/Q_gs < 1), AEC-Q101 compliance, and compact PowerPAK SO-8L footprint - making it optimal for space-constrained, thermally demanding automotive power stages.

Availability

SQJ146EP-T1_GE3 is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, and 48 V mild hybrid DC–DC converters requiring stable component supply and full automotive qualification traceability.

Supply support for SQJ146EP-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 SQJ146EP-T1_GE3 belongs to Vishay's TrenchFET® Gen IV automotive MOSFET family, engineered specifically for high-current, high-temperature power switching in safety-critical vehicle subsystems.

FAQ

What is the maximum continuous drain current rating for SQJ146EP-T1_GE3 at 125 °C case temperature?

The SQJ146EP-T1_GE3 supports 43 A continuous drain current at T_C = 125 °C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits of the PowerPAK SO-8L package and ensures reliable operation in under-hood environments where ambient temperatures exceed 85 °C. The SQJ146EP-T1_GE3 maintains R_DS(on) ≤ 12 mΩ at this condition, preserving efficiency in high-temperature motor drives and DC–DC stages.

Is SQJ146EP-T1_GE3 qualified to AEC-Q101, and what does that cover?

Yes, SQJ146EP-T1_GE3 is fully AEC-Q101 qualified, covering stress tests including high-temperature operating life (HTOL), unclamped inductive switching (UIS), electrostatic discharge (HBM/MM), and temperature cycling. This qualification confirms suitability for automotive powertrain and chassis applications where failure modes must meet ISO 26262 ASIL-B readiness thresholds. The SQJ146EP-T1_GE3 documentation explicitly states AEC-Q101 compliance in its Features section and product summary.

What is the gate-source threshold voltage range for SQJ146EP-T1_GE3, and how does it affect drive circuit design?

The gate-source threshold voltage (V_GS(th)) for SQJ146EP-T1_GE3 is specified as 2.5 V (min) to 3.5 V (max) at I_D = 250 μA. This tight range ensures consistent turn-on behavior across temperature and production lots, allowing gate drivers to operate reliably with 5 V logic-level signals. Because the SQJ146EP-T1_GE3 achieves full enhancement at V_GS ≥ 10 V, drive circuits must deliver ≥10 V to guarantee R_DS(on) ≤ 7.0 mΩ - critical for minimizing conduction loss in high-current automotive switches.

Does SQJ146EP-T1_GE3 have an integrated body diode, and what are its key recovery characteristics?

Yes, SQJ146EP-T1_GE3 includes a monolithic body diode with forward voltage V_SD ≤ 1.1 V at I_F = 15 A and V_GS = 0 V. Its reverse recovery time (t_rr) is 21–32 ns under I_F = 10 A and di/dt = 100 A/μs, and reverse recovery charge (Q_rr) is 8–12 nC. These values enable efficient freewheeling in synchronous buck converters and reduce switching losses in H-bridge motor controllers. The SQJ146EP-T1_GE3 body diode is optimized for fast, soft recovery to limit voltage spikes and EMI.

What is the thermal resistance from junction to case (R_thJC) for SQJ146EP-T1_GE3, and how should it be used in thermal design?

The junction-to-case thermal resistance (R_thJC) for SQJ146EP-T1_GE3 is 2 °C/W, measured from die junction to the exposed drain pad. This value applies when the drain pad is soldered to a large copper area on the PCB, serving as the primary heat transfer path. In thermal modeling, R_thJC must be combined with PCB-to-ambient resistance (e.g., R_thCA ≈ 15–30 °C/W depending on copper area) to estimate total junction-to-ambient rise. For the SQJ146EP-T1_GE3, this low R_thJC enables 75 W dissipation at ΔT = 150 °C - essential for compact automotive power modules.