Diodes Incorporated ZVN4306AVSTOA

Overview

ZVN4306AVSTOA from Diodes Incorporated (formerly Zetex) is an N-channel enhancement-mode vertical DMOS FET rated for 60 V V_DS, 0.33 Ω R_DS(on) at V_GS = 10 V and I_D = 3 A, with 1 A repetitive avalanche current rating. It serves as a low-side power switch in automotive solenoid/relay drivers, stepper motor H-bridge legs, and DC-DC converter synchronous rectifiers.

For engineers reviewing the ZVN4306AVSTOA datasheet, ZVN4306AVSTOA pinout, ZVN4306AVSTOA application, or ZVN4306AVSTOA equivalent, key selection criteria include its TO-92-compatible E-Line package, 1.13 W practical PCB power dissipation, 30 ns turn-off delay, and 25 mJ repetitive avalanche energy - critical for inductive load switching reliability.

Technical Context

This discrete MOSFET uses vertical DMOS architecture to achieve low on-resistance and robust unclamped inductive switching capability. Its 1.3 V to 3 V gate threshold voltage enables direct drive from 3.3 V or 5 V logic, while 700 mS transconductance ensures fast current control under 3 A load conditions.

The device features 350 pF input capacitance and 30 pF reverse transfer capacitance at V_DS = 25 V, supporting efficient high-frequency switching up to several hundred kHz. Thermal resistance of 150 °C/W (junction-to-ambient, PCB-mounted) defines its derating envelope in compact layouts.

Key Specifications

Pinout & Package

Supplied in E-Line TO-92-compatible package (standard lead form, plastic body), with leads identified as Drain (D), Gate (G), Source (S) - pin 1 = Gate, pin 2 = Drain, pin 3 = Source per Zetex standard orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZVN4306A, the STOA variant offers identical electrical performance with optimized packaging for production; versus DMN3020LSD-13, it trades higher voltage rating and through-hole compatibility for higher on-resistance and legacy package constraints.

Availability

ZVN4306AVSTOA is available at Aetrix Electronics and suitable for automotive solenoid drivers, stepper motor controllers, and industrial DC-DC converters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ZVN4306AVSTOA 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

Diodes Incorporated acquired Zetex plc in 2008, integrating its high-performance analog and discrete portfolio into a global semiconductor supplier focused on reliability and application-specific design.

ZVN4306AVSTOA belongs to Zetex's legacy vertical DMOS power FET family, engineered for rugged inductive switching in cost-sensitive automotive and industrial control applications where TO-92 mounting and avalanche tolerance are essential.

FAQ

What is the maximum safe gate-source voltage for ZVN4306AVSTOA?

The absolute maximum V_GS is ±20 V, but reliable operation is ensured at ≤12 V for long-term stability. Exceeding 15 V risks gate oxide degradation, especially at elevated temperatures. The device achieves full enhancement at V_GS = 10 V, making 12 V the recommended upper limit for robust designs with margin.

Can ZVN4306AVSTOA replace a BC337 transistor in relay driver circuits?

No - the ZVN4306AVSTOA is a power MOSFET, not a BJT like the BC337. It requires no base current but needs sufficient gate drive voltage (≥3.5 V) to fully enhance. In relay drivers, it replaces BJTs *only* when used as a low-side switch with appropriate gate buffering; direct substitution without circuit redesign will cause failure due to mismatched biasing and gain mechanisms.

Is thermal pad connection required for ZVN4306AVSTOA in TO-92 package?

No thermal pad is present in the E-Line TO-92 package; heat transfer occurs solely through leads and PCB copper. To achieve the 1.13 W practical dissipation rating, a minimum 1 inch² copper area must be connected to the drain lead (pin 2) using multiple vias. No solderable thermal pad or exposed metal tab exists on this variant.

Does ZVN4306AVSTOA support pulse-width modulation at 20 kHz?

Yes - with 8 ns turn-on delay and 16 ns fall time, it supports clean 20 kHz PWM in relay and motor control. Total switching time (<100 ns) represents <0.2% of the 50 µs period, minimizing dead-time distortion. Ensure gate drive impedance ≤50 Ω and layout minimizes source inductance to maintain timing accuracy.