Diodes Incorporated ZVN3306ASTOB

Overview

ZVN3306ASTOB from Zetex (now Diodes Incorporated) is an N-channel enhancement-mode vertical DMOS FET rated for 60 V V_DS, 5 Ω R_DS(on) at V_GS = 10 V and I_D = 500 mA, with 270 mA continuous drain current at 25°C ambient. It serves as a low-voltage logic-level switch in power management, LED drivers, and load switching circuits where compact TO-92 packaging and moderate current handling are required.

For engineers reviewing the ZVN3306ASTOB datasheet, ZVN3306ASTOB pinout, ZVN3306ASTOB application, or ZVN3306ASTOB equivalent, key selection criteria include verified R_DS(on) at 10 V gate drive, thermal derating behavior across −55°C to +150°C junction range, and pulsed current capability up to 3 A - critical for intermittent load control in space-constrained industrial and consumer modules.

Technical Context

This discrete MOSFET uses vertical DMOS construction to achieve low on-resistance and fast switching with minimal gate charge (Q_g ≈ 4.5 nC typical). Its threshold voltage range of 0.8–2.4 V enables reliable turn-on with standard 3.3 V or 5 V logic outputs without level-shifting.

Designed for DC-coupled switching rather than high-frequency RF or synchronous rectification, it exhibits C_iss = 35 pF, C_oss = 25 pF, and Cr_ss = 8 pF at V_DS = 18 V, supporting clean turn-on/turn-off transitions with td(on) = 5 ns and tf = 8 ns under 18 V/500 mA test conditions.

Key Specifications

Pinout & Package

Package: TO-92 (E-Line compatible), through-hole, 3-pin plastic case with standard D-G-S terminal assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZVN3306ASTOB, ZVN2110A offers lower gate threshold and higher surge current but shares identical TO-92 packaging and thermal limits, while DMN2004LK-7 provides significantly better R_DS(on) at lower V_GS and SMT manufacturability - making it preferable for new designs prioritizing efficiency and assembly scalability.

Availability

ZVN3306ASTOB is available at Aetrix Electronics and suitable for LED drivers, microcontroller I/O load switching, DC motor speed control, and relay driver interfaces requiring stable component supply and long-term obsolescence support.

Supply support for ZVN3306ASTOB 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

Zetex Semiconductors, acquired by Diodes Incorporated in 2008, specialized in high-performance discrete semiconductors for precision analog and power-switching applications.

ZVN3306ASTOB belongs to the ZVNxxxA vertical DMOS FET family, engineered for cost-sensitive, space-constrained logic-level switching in industrial controls, consumer electronics, and automotive body electronics.

FAQ

Is ZVN3306ASTOB suitable for 3.3 V microcontroller GPIO direct drive?

Yes. With a gate threshold voltage range of 0.8–2.4 V and guaranteed turn-on at V_GS ≥ 2.4 V, ZVN3306ASTOB fully enhances using standard 3.3 V logic outputs. Measured R_DS(on) remains ≤6.5 Ω at V_GS = 3.3 V and I_D = 100 mA, ensuring low conduction loss without external level-shifting circuitry.

What is the maximum safe operating temperature for continuous use?

The device supports continuous operation up to +150°C junction temperature. At ambient temperatures above 60°C, derating applies: P_tot decreases linearly at 5 mW/°C beyond 25°C ambient. With standard TO-92 mounting on 1-inch² 1-oz copper, practical continuous operation is limited to ~85°C ambient for 270 mA loads.

Does ZVN3306ASTOB require a gate resistor in typical switching applications?

A series gate resistor (10–100 Ω) is recommended to dampen ringing caused by gate-source capacitance and PCB trace inductance. While not strictly required for DC switching, it improves EMI performance and prevents unintended oscillation during fast edge transitions - especially critical when driving from high-speed MCU pins or long PCB traces.

Can ZVN3306ASTOB replace a BC337 NPN transistor in relay driver circuits?

Yes, with design adjustments. As a low-side switch, ZVN3306ASTOB eliminates base-current requirements and offers lower saturation voltage than BC337's V_CE(sat). However, its gate must be actively pulled low to ensure off-state; a 10 kΩ pull-down resistor is advised. Also verify that V_DS rating covers relay coil flyback voltage spikes.