Diodes Incorporated ZVN0545GTC

Overview

ZVN0545G from Diodes Incorporated is an N-channel enhancement-mode vertical DMOS FET in SOT223 package, rated for 450V drain-source voltage, 50Ω R_DS(ON) at V_GS = 10V, and 140mA continuous drain current at +25°C. It delivers low conduction loss with fast switching (t_D(ON)/t_R ≤ 7ns), suited for high-efficiency offline AC-DC auxiliary power supplies and LED driver bias circuits.

For engineers reviewing the ZVN0545G datasheet, ZVN0545G pinout, ZVN0545G application, or ZVN0545G equivalent, key selection criteria include its 450V BVDSS rating, 50Ω on-resistance at 10V gate drive, thermal performance in SOT223 (PD = 2W), and suitability for low-power high-voltage switching where space-constrained TO-92 alternatives are insufficient.

Technical Context

This MOSFET employs a vertical DMOS structure optimized for high-voltage blocking while maintaining low R_DS(ON) per unit die area. Its gate threshold voltage (1–3V) ensures reliable turn-on with standard logic-level drivers, and its dynamic parameters-C_iss = 70pF, C_oss = 10pF, Crss = 4pF-support efficient high-frequency operation up to several hundred kHz.

The device operates across –55°C to +150°C junction temperature, with IDSS leakage limited to 400µA at 405V and +125°C. Its pulsed drain current capability (IDM = 600mA) enables short-duration surge handling in flyback snubber or startup circuits without thermal runaway.

Key Specifications

Pinout & Package

Package: SOT223 (Type DN), surface-mount, 4-pin outline with exposed drain pad (Pin 2) for thermal conduction. Molded plastic body, UL 94V-0 rated, 0.112g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZVN0545G, ZVN4525G offers superior conduction efficiency at higher load currents but demands greater gate drive strength, while DMN45D0L is electrically incompatible for high-voltage roles-making ZVN0545G uniquely balanced for compact 450V auxiliary switching where moderate current and thermal simplicity are prioritized.

Availability

ZVN0545G is available at Aetrix Electronics and suitable for AC-DC auxiliary power supplies, LED driver bias circuits, industrial sensor interfaces, and smart meter power management requiring stable component supply and long-term lifecycle support.

Supply support for ZVN0545G 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 is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The ZVN0545G belongs to Diodes' high-voltage vertical DMOS FET product line, engineered specifically for cost-sensitive, space-constrained auxiliary power conversion in consumer, industrial, and lighting applications where reliability at 450V is essential.

FAQ

Is ZVN0545G recommended for new designs?

No. Diodes Incorporated explicitly states "ZVN0545G IS NOT RECOMMENDED FOR NEW DESIGNS" in the datasheet. It remains available for legacy support and existing production, but engineers should consult Diodes for qualified replacements like ZVN4525G or newer high-voltage FETs before initiating new projects.

What is the maximum allowable gate-source voltage for ZVN0545G?

The absolute maximum gate-source voltage (V_GSS) is ±20V. Exceeding this rating-even briefly-risks permanent gate oxide damage. Designers must ensure gate drive circuits include clamping (e.g., 15V zener) and limit transient overshoot, especially in inductive switching environments.

How does the SOT223 package affect thermal performance?

The SOT223 (Type DN) exposes the drain pad as the primary thermal path. With 2W total power dissipation at +25°C ambient, effective PCB layout-using ≥2 cm² of 2-oz copper connected to Pin 2-is required to maintain T_J ≤ 150°C. Thermal resistance from junction-to-ambient is ~62.5°C/W under standard JEDEC test conditions.

Can ZVN0545G be used in automotive applications?

ZVN0545G is not AEC-Q101 qualified. While it meets RoHS and halogen-free requirements, Diodes specifies that automotive-grade parts require explicit qualification (AEC-Q101), PPAP capability, and IATF 16949 manufacturing-none of which apply to this part. Use only in non-safety-critical, non-automotive systems unless requalified.