Diodes Incorporated ZVN4210ASTZ

Overview

ZVN4210ASTZ from Zetex (now Diodes Incorporated) is an N-channel enhancement-mode vertical DMOS FET in TO-92 package, rated for 100 V V_DS, 1.5 Ω R_DS(on) at V_GS = 10 V and I_D = 1.5 A, with 450 mA continuous drain current at 25°C ambient. It serves as a low-voltage logic-level switching device in power management circuits, LED drivers, and relay drivers where compact through-hole mounting and moderate current handling are required.

For engineers reviewing the ZVN4210ASTZ datasheet, ZVN4210ASTZ pinout, ZVN4210ASTZ application, or ZVN4210ASTZ equivalent, key selection criteria include verified R_DS(on) at 5 V gate drive, thermal derating behavior up to +150°C junction temperature, and TO-92 mechanical compatibility with legacy board layouts requiring lead-forming support.

Technical Context

This discrete MOSFET uses vertical DMOS architecture to achieve enhanced breakdown voltage and stable threshold voltage over temperature. Its gate threshold voltage range (0.8–2.4 V) enables reliable turn-on with standard TTL/CMOS logic outputs, while the 100 pF input capacitance and 12 pF reverse transfer capacitance support fast switching in low-power DC-DC control stages.

The device exhibits monotonic R_DS(on) increase with junction temperature-normalized to 1.0 at 25°C and ~1.8× at 125°C-enabling predictable thermal design in non-heatsinked applications. Its 4 ns turn-on delay and 30 ns fall time are characterized under V_DD ≈ 25 V, I_D = 1.5 A conditions, confirming suitability for <100 kHz switching frequencies.

Key Specifications

Pinout & Package

Supplied in E-Line TO-92 compatible package (ZVN4210A 3-388), with leads formed for through-hole mounting. Pin identification follows standard TO-92 orientation: viewed from flat side with leads down, left-to-right is Drain–Gate–Source.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZVN4210ASTZ, ZVN3310F trades voltage headroom and efficiency for cost, while DMN2004LK-7 offers better low-V_GS performance but eliminates mechanical compatibility-making ZVN4210ASTZ the sole option for TO-92-restricted, 100 V-capable logic-level switching.

Availability

ZVN4210ASTZ is available at Aetrix Electronics and suitable for LED drivers, relay interfaces, synchronous rectifiers, and overvoltage protection circuits requiring stable component supply with long-lifecycle support.

Supply support for ZVN4210ASTZ 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 analog and power applications.

The ZVN4210A series targets cost-sensitive, space-constrained linear and switching power control functions where TO-92 mounting, logic-level drive, and 100 V capability are jointly required.

FAQ

Is ZVN4210ASTZ suitable for 5 V microcontroller GPIO direct drive?

Yes. With V_GS(th) as low as 0.8 V and R_DS(on) ≤ 2.2 Ω at V_GS = 5 V, it fully enhances using standard 5 V logic outputs. Gate capacitance (100 pF) ensures minimal drive current demand-typically <1 mA peak during switching-well within GPIO limits of most MCUs.

What is the maximum continuous drain current at 70°C ambient?

Derating from 450 mA at 25°C follows the 700 mW P_tot limit and thermal resistance R_θJA ≈ 180°C/W (typical for TO-92 on 1-in² FR4). At 70°C ambient, maximum I_D is approximately 280 mA to maintain T_j ≤ 150°C, calculated via I_D² × R_DS(on) ≤ (150 − 70) × (1/180).

Does ZVN4210ASTZ have avalanche rating or SOA curves in its datasheet?

No. The datasheet does not specify single-pulse avalanche energy (E_AS) or Safe Operating Area (SOA) plots. It is rated for repetitive pulsed current (I_DM = 6 A) but must be operated within DC and transient voltage/current limits defined in Absolute Maximum Ratings-no avalanche ruggedness guarantee is provided.

Can ZVN4210ASTZ replace BS170 in existing designs?

Yes, with verification. Both are TO-92 N-channel MOSFETs, but ZVN4210ASTZ offers higher V_DS (100 V vs. 60 V), lower R_DS(on) (1.5 Ω vs. 5 Ω), and tighter V_GS(th) distribution. Layout compatibility is confirmed; however, gate charge differences may affect switching speed-validate timing in target PWM frequency range.