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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated ZXM61N03FTC

Name: ZXM61N03FTC
Brand: Diodes Incorporated
SKU: ZXM61N03FTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXM61N03FTC

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXM61N03FTC.pdf

Description:: MOSFET N-CH 30V 1.4A SOT23-3

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Product details

Overview

ZXM61N03FTC from Diodes Incorporated (formerly Zetex) is a 30V N-channel enhancement-mode MOSFET in SOT23 package, rated for 1.4A continuous drain current at 25°C, with R_DS(on) = 0.22 Ω at V_GS = 10V and fast switching (t_d(on) = 1.9 ns, Q_g = 4.1 nC), used in low-voltage DC-DC converters and power management disconnect switches.

For engineers reviewing the ZXM61N03FTC datasheet, ZXM61N03FTC pinout, ZXM61N03FTC application, or ZXM61N03FTC equivalent, key selection criteria include verified R_DS(on) at 4.5V (0.30 Ω), body diode V_SD = 0.95V, thermal resistance R_θJA = 155 °C/W on FR4, and SOT23-3 terminal configuration for space-constrained PCB layouts.

Technical Context

This MOSFET employs a high-density planar structure optimized for low-voltage power switching, delivering low gate charge (Q_g = 4.1 nC) and fast turn-on/turn-off times (t_r = 2.5 ns, t_f = 3.0 ns) while maintaining robust safe operating area (SOA) up to 7.3A pulsed drain current.

Its threshold voltage V_GS(th) = 1.0 V (min) enables compatibility with 3.3V and 5V logic-level gate drivers, and its body diode exhibits t_rr = 11.0 ns and Q_rr = 3.5 nC - critical for synchronous rectification and flyback snubberless designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS max	30 V - supports 24V rail and 12V automotive systems with margin
R_DS(on) @ 10V	0.22 Ω - enables <100 mW conduction loss at 0.91A load
R_DS(on) @ 4.5V	0.30 Ω - ensures reliable turn-on from standard 3.3V/5V microcontroller GPIO
Q_g	4.1 nC - reduces gate drive power and enables >1 MHz switching in buck regulators
t_r/t_f	2.5 ns / 3.0 ns - minimizes switching transition losses in high-frequency SMPS
V_GS(th)	1.0 V min - guarantees enhancement-mode operation with low-voltage logic control
R_θJA	155 °C/W - defines thermal derating to 806 mW at 25°C ambient on FR4

Pinout & Package

SOT23-3 surface-mount package with gull-wing leads; compact 2.9 × 1.3 × 1.0 mm footprint ideal for dense power stage layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 (Source)	Power return path and body diode cathode	Connected to ground or low-side return; carries reverse recovery current during freewheeling
2 (Gate)	Control input for channel conduction	Requires <4.1 nC charge for full turn-on; sensitive to ESD (±20 V rating)
3 (Drain)	Main power output node	Handles 30V blocking and 1.4A continuous current; connected to switched load or inductor node

Key Features

Feature	Design Value
Low R_DS(on) at 4.5V	0.30 Ω - eliminates need for level-shifting gate drivers in 3.3V systems
Fast switching speed	t_d(on) = 1.9 ns, t_d(off) = 5.8 ns - reduces overlap loss in synchronous buck topologies
Low gate threshold	V_GS(th) = 1.0 V min - ensures guaranteed turn-on with weak MCU outputs or resistive pull-ups
Optimized body diode	V_SD = 0.95 V, t_rr = 11 ns - supports efficient asynchronous flyback and load dump protection

Applications

DC-DC Converters

Power Management Functions

Use Scenario: Step-down regulation in portable USB-powered devices with 5V input and 3.3V/1.8V output rails.

IC Role / Device Role: Low-side synchronous rectifier switch in buck converter topology.

Use Value: 0.22 Ω R_DS(on) limits conduction loss to <150 mW at 1.2A, improving efficiency by ≥2% vs. higher-R_DS(on) alternatives.

Use Scenario: Load switching for battery-backed real-time clock (RTC) or sensor bias rails.

IC Role / Device Role: High-side or low-side power path switch enabling controlled power-up/power-down sequencing.

Use Value: 1.0 V V_GS(th) allows direct control from 1.8V I/O, eliminating external level shifters and reducing BOM count.

Disconnect Switches

Motor Control

Use Scenario: Reverse-polarity and overcurrent protection in 12V automotive accessory modules.

IC Role / Device Role: Low-side current-sense shunt switch with integrated body diode for fault clamping.

Use Value: 7.3A pulsed rating and 11 ns t_rr enable fast fault response without external TVS, reducing board area by 30%.

Use Scenario: H-bridge half-bridge driver for small brushed DC motors in consumer robotics.

IC Role / Device Role: One quadrant switch controlling motor direction and PWM speed modulation.

Use Value: 4.1 nC Q_g permits 500 kHz PWM without excessive gate drive loss, sustaining 1.4A stall current within thermal limits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2004LK-7	R_DS(on) = 0.18 Ω @ 4.5V; Q_g = 3.8 nC; SOT23-3	Lower on-resistance but tighter V_GS(th) distribution (1.2–2.2 V)	Preferred where <0.2 Ω R_DS(on) is critical and gate drive voltage ≥4.5V is assured.
AO3400	R_DS(on) = 0.028 Ω @ 10V; Q_g = 12 nC; SOT23-3	Higher gate charge increases drive loss above 200 kHz; same V_GS(th) range	Selected when ultra-low R_DS(on) justifies added gate drive complexity and cost.

Compared with DMN2004LK-7 and AO3400, ZXM61N03FTC offers balanced trade-offs: lower Q_g than AO3400 for high-frequency efficiency, and more predictable 1.0 V V_GS(th) minimum than DMN2004LK-7 for marginal 3.3V logic compatibility.

Availability

ZXM61N03FTC is available at Aetrix Electronics and suitable for DC-DC converters, power management functions, and disconnect switches requiring stable component supply and SOT23-3 footprint consistency.

Supply support for ZXM61N03FTC 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 in 2008 and maintains its high-performance analog and power semiconductor portfolio, emphasizing reliability, thermal efficiency, and application-specific optimization.

ZXM61N03FTC belongs to Zetex's legacy "ZXM" series of low-voltage logic-level MOSFETs, engineered specifically for space-constrained, high-efficiency power management in portable and battery-operated systems.

FAQ

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

The ZXM61N03FTC supports 1.1 A continuous drain current at T_A = 70°C, derived from its 806 mW power dissipation limit and 155 °C/W thermal resistance - confirmed in Absolute Maximum Ratings Table under note (b).

Does this MOSFET have an integrated body diode, and what are its characteristics?

Yes, it includes a source-drain body diode with forward voltage V_SD = 0.95 V at I_S = 0.91 A and T_J = 25°C, plus reverse recovery time t_rr = 11.0 ns and Q_rr = 3.5 nC - specified in Electrical Characteristics Table under Source-Drain Diode section.

Can ZXM61N03FTC be driven directly from a 3.3V microcontroller GPIO?

Yes - its V_GS(th) minimum is 1.0 V and R_DS(on) = 0.30 Ω at V_GS = 4.5V, ensuring full enhancement with 3.3V logic when gate capacitance (C_iss = 150 pF) is driven through ≤100 Ω series resistance per typical layout guidelines.

What is the safe operating area (SOA) limitation at DC operation?

At DC, the SOA is bounded by R_DS(on)-limited conduction and thermal limits: maximum 1.4 A at 25°C ambient, derating linearly to zero at T_J = 150°C using 6.4 mW/°C derating factor - validated by the DC curve in the Safe Operating Area graph on page 2.

ZXM61N03FTC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 1.4A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 220mOhm @ 910mA, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 4.1 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 150 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 625mW (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXM61N03FTC FAQ

1.How can I place an order for ZXM61N03FTC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXM61N03FTC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ZXM61N03FTC reliable?

The price and inventory of ZXM61N03FTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXM61N03FTC is usually 5 days.

3.What payment methods are accepted for ZXM61N03FTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXM61N03FTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXM61N03FTC?

ZXM61N03FTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXM61N03FTC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ZXM61N03FTC?

For technical support, including ZXM61N03FTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXM61N03FTC requirements.

6.How does Aetrix verify that ZXM61N03FTC is sourced from the original manufacturer or authorized distributors?

All ZXM61N03FTC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZXM61N03FTC meets industry standards.

7.What is the process for return or replacement of ZXM61N03FTC?

All ZXM61N03FTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXM61N03FTC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ZXM61N03FTC part is unused and in its original packaging.

Return procedure for ZXM61N03FTC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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