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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays

Diodes Incorporated MMDT4403-7-F

Name: MMDT4403-7-F
Brand: Diodes Incorporated
SKU: MMDT4403-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMDT4403-7-F

Manufacturer:: Diodes Incorporated

Category:: Bipolar Transistor Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: MMDT4403-7-F.pdf

Description:: TRANS 2PNP 40V 600MA SOT-363

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Product details

Overview

MMDT4403-7-F from Diodes Incorporated is a dual PNP small-signal surface-mount transistor in SOT-363 package, rated for V_CEO = −40 V, I_C = −600 mA, and P_D = 200 mW, with h_FE = 30–300 (at I_C = −100 µA to −500 mA), used for low-power amplification and switching in compact DC-DC converters and signal routing circuits.

For engineers reviewing the MMDT4403-7-F datasheet, MMDT4403-7-F pinout, MMDT4403-7-F application, or MMDT4403-7-F equivalent, key selection criteria include verified dual-PNP configuration, SOT-363 thermal resistance (R_θJA = 625 °C/W), V_CE(SAT) ≤ −0.75 V at I_C = −500 mA, f_T = 200 MHz, and RoHS-compliant green molding compound.

Technical Context

This dual discrete PNP transistor integrates two identical epitaxial planar junctions in a single ultra-small SOT-363 package, sharing common emitter connections per device or configured as independent switches. Its design supports simultaneous low-voltage switching and analog amplification with matched h_FE tracking across channels.

Thermal performance is defined under JEDEC-standard FR-4 PCB mounting (1″ × 0.85″ × 0.062″), with moisture sensitivity level 1 and maximum junction temperature of +150 °C - enabling use in thermally constrained industrial control modules and portable power management ICs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V: Maximum safe collector-emitter voltage before breakdown in common-emitter configuration.
I_C (max)	−600 mA: Continuous collector current limit defining switching capacity in load driver stages.
P_D	200 mW: Power dissipation limit on standard FR-4 board, constraining duty-cycle in PWM applications.
h_FE	30–300: DC current gain range across I_C = −100 µA to −500 mA, enabling bias stability in amplifier bias networks.
f_T	200 MHz: Gain-bandwidth product confirming usable frequency response up to VHF band in RF front-end switching.
V_CE(SAT)	−0.75 V @ I_C = −500 mA: Saturation voltage determining conduction loss in high-current digital logic interfaces.
R_θJA	625 °C/W: Junction-to-ambient thermal resistance under specified PCB layout, guiding heatsinking requirements.

Pinout & Package

Package: SOT-363 - ultra-small surface-mount plastic case (UL 94V-0), 0.006 g weight, lead-free matte tin plating over Alloy 42 leadframe.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter of Transistor 1	Common emitter connection point for first PNP element; tied to ground or reference rail in switch configurations.
2	Base of Transistor 1	Control input for first transistor; requires negative bias relative to emitter to turn on.
3	Collector of Transistor 1	Output node for first transistor; sinks current when active in common-emitter switching.
4	Collector of Transistor 2	Independent output node for second PNP; enables dual-channel load control without shared collectors.
5	Base of Transistor 2	Separate control input for second transistor; allows asynchronous or complementary drive signals.
6	Emitter of Transistor 2	Second emitter terminal; may be tied to same rail as Pin 1 or isolated for differential operation.

Key Features

Feature	Design Value
Dual PNP topology	Two matched epitaxial planar transistors in one SOT-363 footprint, reducing board area by ~40% vs. discrete SOT-23 pair.
Low V_CE(SAT)	−0.40 V @ I_C = −150 mA ensures <120 mW conduction loss in 3.3 V logic-level switching applications.
High f_T	200 MHz bandwidth supports clean edge transitions in 50 MHz clock distribution and pulse shaping circuits.
Green molding compound	Halogen-free, Sb₂O₃-free encapsulant (Date Code UO and later) meeting IPC-JEDEC J-STD-020C Level 1 moisture sensitivity.
RoHS compliance	Lead-free plating and packaging certified to EU Directive 2011/65/EU, eliminating post-soldering cleaning steps.

Applications

LED Driver Circuit

Level-Shifting Interface

Use Scenario: Driving dual-color indicator LEDs from 3.3 V microcontroller GPIO pins with current limiting.

IC Role / Device Role / Timing Role: Dual PNP switch sinking LED anode current through common cathode, enabling independent on/off control.

Use Value: V_CE(SAT) ≤ −0.4 V minimizes voltage drop across transistor, preserving ≥2.8 V forward bias for red/green LEDs.

Use Scenario: Translating 1.8 V logic outputs to 5 V-tolerant inputs in mixed-voltage sensor subsystems.

IC Role / Device Role / Timing Role: Active-low level shifter using emitter-follower configuration with base pulled to 5 V via resistor.

Use Value: h_FE ≥ 100 at I_C = −1 mA ensures full logic swing translation with <10 ns propagation delay.

DC-DC Converter Feedback

Industrial I/O Protection

Use Scenario: Isolating error amplifier output from optocoupler input in isolated flyback controllers.

IC Role / Device Role / Timing Role: PNP buffer stage providing current gain and voltage inversion to drive PC817 primary side.

Use Value: f_T = 200 MHz supports stable loop compensation up to 500 kHz switching frequencies.

Use Scenario: Protecting PLC digital input channels against reverse polarity and ESD transients.

IC Role / Device Role / Timing Role: Dual PNP clamp pair limiting input voltage to −0.7 V below ground during fault conditions.

Use Value: V_EB(OFF) = −5.0 V rating prevents forward conduction during −4 V surges, preserving input integrity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual PNP switching and amplification applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMT301PFB-7	Higher V_CEO (−60 V), lower R_θJA (430 °C/W), but h_FE min = 100 only at I_C = −10 mA.	Better for 24 V industrial bus interfaces; less suitable for low-I_C bias networks requiring h_FE > 30 at µA levels.	Select when higher breakdown margin and thermal headroom outweigh need for wide h_FE range.
NSVDMMT3906LT1G	SOT-363 package, V_CEO = −40 V, but h_FE = 100–300 (narrower range), and V_CE(SAT) = −0.4 V only at I_C = −10 mA.	Optimized for digital switching, not linear amplification; lacks guaranteed h_FE at I_C < −1 mA.	Prefer for pure on/off logic buffering where gain linearity is irrelevant.

Compared with MMDT4403-7-F, DMT301PFB-7 offers superior voltage and thermal robustness but sacrifices low-current gain flexibility, while NSVDMMT3906LT1G simplifies digital designs at the cost of analog performance fidelity across operating current extremes.

Availability

MMDT4403-7-F is available at Aetrix Electronics and suitable for LED driver circuits, level-shifting interfaces, DC-DC converter feedback paths, and industrial I/O protection requiring stable component supply and RoHS-compliant manufacturing.

Supply support for MMDT4403-7-F 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 manufacturing in China, Taiwan, and Malaysia.

The MMDT4403 belongs to Diodes' small-signal transistor portfolio, engineered specifically for space-constrained, low-power switching and amplification in consumer, computing, and industrial power management systems.

FAQ

What is the marking code for MMDT4403-7-F?

The top-side marking is "K2T", followed by a two-character date code (e.g., "YM" for week 40, 2007). This matches Diodes Inc.'s standardized SOT-363 marking scheme documented in DS30110 Rev. 10, page 4, and is laser-etched on the package body for traceability.

Can MMDT4403-7-F be used in linear amplifier configurations?

Yes - its h_FE specification covers I_C = −100 µA to −500 mA with monotonic behavior, and V_BE(ON) shows predictable variation across temperature (Fig. 3). The 200 MHz f_T and low C_cb (8.5 pF) support stable Class-A operation up to 10 MHz with proper biasing.

Is thermal derating required above 25°C ambient?

Yes - Fig. 1 shows maximum power dissipation drops linearly from 200 mW at 25°C to zero at ~150°C ambient. Derating slope is −1.6 mW/°C, calculated from R_θJA = 625 °C/W. At 70°C ambient, max P_D = 128 mW must be enforced to avoid junction overheating.

Does MMDT4403-7-F support hot-swap or in-circuit programming?

No - it lacks built-in ESD protection diodes or latch-up immunity features. Absolute maximum ratings specify no ESD tolerance beyond standard HBM (per JEDEC JESD22-A114), and V_EB(OFF) = −5.0 V limits reverse-bias safety margin. External TVS or series resistors are required for hot-swap environments.

MMDT4403-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: 2 PNP (Dual)

Current - Collector (Ic) (Max):: 600mA

Voltage - Collector Emitter Breakdown (Max):: 40V

Vce Saturation (Max) @ Ib, Ic:: 750mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 200mW

Frequency - Transition:: 200MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-363

MMDT4403-7-F FAQ

1.How can I place an order for MMDT4403-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMDT4403-7-F 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 MMDT4403-7-F reliable?

The price and inventory of MMDT4403-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMDT4403-7-F is usually 5 days.

3.What payment methods are accepted for MMDT4403-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMDT4403-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMDT4403-7-F?

MMDT4403-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMDT4403-7-F 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 MMDT4403-7-F?

For technical support, including MMDT4403-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMDT4403-7-F requirements.

6.How does Aetrix verify that MMDT4403-7-F is sourced from the original manufacturer or authorized distributors?

All MMDT4403-7-F 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 MMDT4403-7-F meets industry standards.

7.What is the process for return or replacement of MMDT4403-7-F?

All MMDT4403-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMDT4403-7-F, 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 MMDT4403-7-F part is unused and in its original packaging.

Return procedure for MMDT4403-7-F:

1.Submit a request within 90 days.

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

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