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

Diodes Incorporated DI9430T

Name: DI9430T
Brand: Diodes Incorporated
SKU: DI9430T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DI9430T

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: -

Datasheet:: DI9430T.pdf

Description:: MOSFET P-CH 20V 5.3A 8-SOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,661

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Product details

Overview

DI9430T from Diodes Incorporated is a single P-channel enhancement-mode MOSFET designed for high-side load switching in low-voltage DC-DC power management circuits. It features -20 V V_DSS, 5.3 A continuous drain current at 25°C, 0.055 Ω R_DS(ON) at V_GS = -10 V, and SO-8 package with exposed drain pad for thermal performance - used in USB port protection and battery backup switchover circuits.

For engineers reviewing the DI9430T datasheet, DI9430T pinout, DI9430T application, or DI9430T equivalent, key selection criteria include verified R_DS(ON) at -4.5 V gate drive, safe operating area under pulsed 15 A loads, thermal resistance validation for PCB copper area (R_JA = 50°C/W @ 1 in²), and diode recovery time (t_rr = 80 ns) for synchronous rectifier compatibility.

Technical Context

This MOSFET operates as a normally-off, voltage-controlled high-side switch with gate threshold voltage V_GS(th) ranging from -1.0 V to -3.0 V (min/max at 125°C), enabling robust turn-on control down to -4.5 V logic levels. Its DMOS cell structure delivers low on-resistance while maintaining fast switching (t_D(ON) = 13 ns, t_f = 28 ns) and high transient tolerance per JEDEC JESD47.

The device integrates a body diode with V_SD = -1.04 V at -5.3 A and t_rr = 80 ns, supporting bidirectional current handling in OR-ing and reverse-polarity protection topologies. Junction temperature range (-55°C to +150°C) and R_JC = 25°C/W confirm suitability for thermally constrained industrial and automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	-20 V - maximum blocking voltage before avalanche conduction in high-side switch configuration
R_DS(ON)	0.055 Ω @ V_GS = -10 V, I_D = -5.3 A - enables <110 mW conduction loss at full rated current
I_D Continuous	±5.3 A @ T_A = 25°C - supports 5 V/3 A USB PD load switching with margin
t_rr	80 ns - allows use in 1–2 MHz synchronous buck converters without shoot-through risk
R_JA	50 °C/W @ 1 in² 2 oz Cu - defines minimum PCB copper area needed to maintain T_J < 125°C at full power
Q_g	38 nC - determines gate driver current requirement (~3.8 mA avg for 100 kHz switching)
V_GS(th)	-1.0 to -3.0 V @ T_J = 125°C - ensures reliable turn-on with standard -5 V or -3.3 V logic-level gate drivers

Pinout & Package

DI9430T uses an SO-8 plastic package with exposed drain pad (pin 1–4 and 6–8 are source/gate terminals; pins 5 and the exposed pad are drain). Thermal performance depends on soldered copper area beneath the drain pad.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	Source	Common return path for load current; tied to system ground in high-side configuration
5, Exposed Pad	Drain	Main power input terminal; requires direct thermal connection to PCB copper for R_JA = 50°C/W
6	Gate	Control input; driven by logic-level signal to modulate channel conductivity
7, 8	Source	Additional source connections to reduce bond wire inductance and improve current sharing

Key Features

Feature	Design Value
High cell density DMOS technology	Enables 0.055 Ω R_DS(ON) in SO-8 footprint - reduces board space vs. TO-252 alternatives
Low R_DS(ON) at -4.5 V V_GS	0.067 Ω max - supports direct interface with 3.3 V microcontroller GPIO without level-shifting
Fast switching speed	t_f = 28 ns - minimizes switching losses in 500 kHz–2 MHz DC-DC applications
Body diode with low V_SD	-1.04 V @ -5.3 A - reduces forward drop and heat generation in OR-ing configurations
Transient thermal impedance	r(t) = 0.01 × R_JA at 10 ms - sustains 15 A pulsed current without junction overheating

Applications

USB Power Delivery Switching

Battery Backup Switchover

Use Scenario: Selecting between main supply and USB-C PD input in portable medical monitors.

IC Role / Device Role / Timing Role: High-side P-channel MOSFET controlling power path with reverse polarity protection.

Use Value: R_DS(ON) ≤ 0.055 Ω limits voltage drop to <280 mV at 5 A, preserving 5 V regulation margin.

Use Scenario: Seamless transition from AC adapter to Li-ion battery during brownout in industrial data loggers.

IC Role / Device Role / Timing Role: Load switch enabling automatic OR-ing with <80 ns body diode recovery.

Use Value: t_rr = 80 ns prevents cross-conduction during switchover, eliminating output glitch.

Reverse Polarity Protection

Hot-Swap Controller Interface

Use Scenario: Protecting 12 V CAN bus nodes against accidental reversed DC jack insertion.

IC Role / Device Role / Timing Role: In-line P-MOSFET acting as ideal diode with controlled turn-on slew rate.

Use Value: V_GS(th) min = -1.0 V ensures full enhancement at -12 V supply, blocking reverse current.

Use Scenario: Gate driver stage for hot-swap FETs in telecom line cards requiring inrush limiting.

IC Role / Device Role / Timing Role: Low-Q_g (38 nC) switch enabling precise gate voltage ramp control via external RC.

Use Value: Q_gd/Q_gs ratio of ~4:1 supports stable Miller plateau control during soft-start.

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel load switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN3020LFG-7	R_DS(ON) = 0.035 Ω @ -10 V but V_DSS = -30 V; SO-8 with different pinout (drain on pins 1,2,3,4)	Higher voltage rating suits 24 V systems; incompatible pinout requires PCB redesign	Select only if higher V_DSS margin is required and layout revision is acceptable
SI2301DDS-T1-BE3	R_DS(ON) = 0.115 Ω @ -4.5 V; SOT-23 package; lower current rating (2.7 A)	Limited to sub-3 A loads; unsuitable for 5 A USB PD or battery switchover	Use only for space-constrained, low-current applications where thermal budget permits higher R_DS(ON)

Compared with DMN3020LFG-7 and SI2301DDS-T1-BE3, DI9430T uniquely balances 5.3 A current capability, 0.055 Ω R_DS(ON) at -10 V, SO-8 pin-compatibility with standard high-side layouts, and validated 80 ns body diode recovery - making it optimal for USB PD and battery OR-ing where thermal and timing margins are tight.

Availability

DI9430T is available at Aetrix Electronics and suitable for USB power delivery switching, battery backup switchover, reverse polarity protection, and hot-swap controller interface applications requiring stable component supply across production lifecycles.

Supply support for DI9430T 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 centers across Asia and Europe.

The DI9430T belongs to Diodes' high-density DMOS power MOSFET product line, engineered specifically for compact, thermally efficient high-side switching in portable and industrial power systems.

FAQ

What is the maximum safe continuous drain current for DI9430T at 70°C ambient?

At T_A = 70°C with 1 in² of 2 oz. copper, DI9430T supports ±4.2 A continuous drain current. This derating follows from its 2.5 W maximum power dissipation and R_JA = 50°C/W, ensuring junction temperature remains below 150°C under steady-state conditions.

Does DI9430T require a gate resistor for ESD protection?

Yes - a 10–100 Ω series gate resistor is recommended to dampen ringing and limit peak current during fast edge transitions. The device's Q_g = 38 nC and C_iss = 1430 pF make it susceptible to oscillation without proper gate drive impedance control.

Can DI9430T be used in parallel with identical units for higher current?

No - DI9430T lacks built-in current-sharing features such as matched V_GS(th) or integrated sense resistors. Parallel operation risks thermal runaway due to R_DS(ON) mismatch across temperature, and is not characterized or recommended in the datasheet.

Is the exposed drain pad electrically isolated from other pins?

No - the exposed drain pad is internally connected to pin 5 and forms the primary drain terminal. It must be soldered to a dedicated PCB copper pour tied to the drain net; floating or grounded connection will cause functional failure or damage.

DI9430T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

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

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

DI9430T FAQ

1.How can I place an order for DI9430T through Aetrix?

Please submit a Request for Quotation (RFQ) for DI9430T 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 DI9430T reliable?

The price and inventory of DI9430T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DI9430T is usually 5 days.

3.What payment methods are accepted for DI9430T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DI9430T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DI9430T?

DI9430T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DI9430T 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 DI9430T?

For technical support, including DI9430T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DI9430T requirements.

6.How does Aetrix verify that DI9430T is sourced from the original manufacturer or authorized distributors?

All DI9430T 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 DI9430T meets industry standards.

7.What is the process for return or replacement of DI9430T?

All DI9430T units undergo pre-shipment inspection (PSI). If there is an issue with DI9430T, 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 DI9430T part is unused and in its original packaging.

Return procedure for DI9430T:

1.Submit a request within 90 days.

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

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