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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated MMBT4401-13-F

Name: MMBT4401-13-F
Brand: Diodes Incorporated
SKU: MMBT4401-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBT4401-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: MMBT4401-13-F.pdf

Description:: TRANS NPN 40V 0.6A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBT4401-13-F from Diodes Incorporated is a 40 V, 600 mA NPN small-signal transistor in SOT23 package, optimized for medium-power switching and amplification with h_FE = 40–300 (IC = 1–500 mA), V_CE(sat) ≤ 0.75 V (IC = 500 mA, IB = 50 mA), and f_T = 250 MHz - deployed in DC-DC converter bias circuits, LED drivers, and signal-level logic interface stages.

For engineers reviewing the MMBT4401-13-F datasheet, MMBT4401-13-F pinout, MMBT4401-13-F application, or MMBT4401-13-F equivalent, key selection criteria include verified V_CEO/I_C derating at +125°C, ESD robustness (HBM 4 kV), thermal resistance (R_θJA = 357°C/W on 15 mm × 15 mm copper), and complementary pairing with MMBT4403.

Technical Context

This NPN bipolar junction transistor uses epitaxial planar die construction to deliver stable current gain across temperature (−55°C to +150°C) and supports fast switching with td ≤ 15 ns, tr ≤ 20 ns, ts ≤ 225 ns, and tf ≤ 30 ns under standardized 30 V/150 mA test conditions. Its low C_cb = 6.5 pF and C_eb = 30 pF enable high-frequency small-signal amplification up to 250 MHz.

The device operates with V_BE(sat) = 0.75–1.2 V (IC = 150–500 mA), enabling predictable base drive design, and maintains ICEX ≤ 100 nA at V_CE = 35 V - critical for low-leakage standby states in battery-powered systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility in 24 V and 36 V industrial control circuits.
I_C	600 mA continuous - Supports load switching up to ~300 mW dissipation in compact SOT23 footprint without forced cooling.
h_FE	40–300 - Wide DC current gain range enables flexible biasing: high-gain for sensor amplification (IC = 100 µA), lower-gain for saturated switching (IC = 500 mA).
f_T	250 MHz - Enables RF pre-amplifier and oscillator buffer use up to UHF band; validated at V_CE = 10 V, I_C = 20 mA.
R_θJA	357°C/W - Thermal resistance on 15 mm × 15 mm 1 oz copper PCB; allows ~290 mW max power at T_A = 85°C per derating curve.
ESD HBM	4,000 V - Robust handling margin for manual assembly and board-level integration without special ESD precautions.

Pinout & Package

Package: SOT23 - Surface-mount plastic package (2.90 mm × 1.30 mm × 0.915 mm), UL 94V-0 rated, matte tin-plated leads, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Connected to ground or low-side return path; requires low-impedance layout to minimize V_CE error in precision switching.
2 (Base)	Control input	Receives current-limited drive (IB ≤ 200 mA peak); base resistor selection must ensure saturation at worst-case h_FE min.
3 (Collector)	Current source terminal	Switches positive rail loads; trace width and thermal pad design must accommodate 600 mA continuous and 1 A pulse current.

Key Features

Feature	Design Value
Epitaxial planar die	Ensures tight parameter distribution (h_FE, V_CE(sat)) across production lots and stable operation from −55°C to +150°C.
Complementary PNP pairing	MMBT4403 shares identical SOT23 footprint and thermal profile - simplifies dual-rail driver and push-pull amplifier layout.
Green compound packaging	Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); meets RoHS 3 (2015/863/EU) and automotive supply chain requirements.
Low C_eb / C_cb	30 pF / 6.5 pF at 1 MHz - Minimizes Miller effect in high-speed switching, supporting clean edge transitions in PWM dimming circuits.

Applications

DC-DC Converter Bias Circuit

LED Constant-Current Driver

Use Scenario: Provides base drive for main power switch in buck converter feedback loop, regulating output via optocoupler-coupled error amplifier.

IC Role / Device Role / Timing Role: Medium-current NPN switch controlling gate voltage of secondary-side MOSFET or BJT in isolated flyback auxiliary supply.

Use Value: V_CE(sat) ≤ 0.4 V at IC = 150 mA ensures minimal dropout loss; h_FE ≥ 40 guarantees reliable turn-on with limited opto-output current.

Use Scenario: Drives series-connected white LEDs in automotive interior lighting, operating from 12 V battery with PWM dimming.

IC Role / Device Role / Timing Role: Low-side current switch modulating LED string current at 1–2 kHz; handles 350 mA average load with 100% duty cycle capability.

Use Value: R_θJA = 357°C/W enables sustained 350 mA operation at +85°C ambient without heatsink; ESD HBM = 4 kV prevents field failure during vehicle assembly.

Microcontroller GPIO Interface

Industrial Sensor Signal Amplifier

Use Scenario: Translates 3.3 V/5 V microcontroller GPIO outputs to 12 V/24 V logic levels for relay or solenoid control in PLC I/O modules.

IC Role / Device Role / Timing Role: Digital switch translating logic-high to collector pull-down; operates in saturation with IB/IC ratio ≥ 10 for guaranteed low V_CE(sat).

Use Value: V_CEO = 40 V provides 16 V headroom above 24 V rail; fast switching (tr ≤ 20 ns) supports >50 kHz PWM control without distortion.

Use Scenario: Amplifies low-level analog output (0.5–2.5 V) from thermistor-based temperature sensor in HVAC control unit.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed bias network; configured for linear operation with I_C = 1 mA, V_CE = 5 V.

Use Value: h_FE = 200 at IC = 1 mA ensures stable gain over −25°C to +125°C; C_eb = 30 pF avoids phase shift in 10 kHz bandwidth requirement.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PN2222A (ON Semiconductor)	Higher V_CEO = 40 V (same), but lower f_T = 300 MHz (vs. 250 MHz), higher V_CE(sat) = 0.6 V @ IC = 500 mA.	Less suitable for UHF amplification; better for general-purpose switching where gain-bandwidth is not critical.	Select when legacy footprint compatibility is required and 250 MHz f_T is unnecessary.
BC847BW (Nexperia)	Same SOT323 package (smaller than SOT23), lower I_C = 100 mA, V_CEO = 45 V, h_FE = 200–450 at IC = 2 mA.	Not interchangeable due to different package size and current rating; suited only for low-power signal buffering.	Choose only for space-constrained designs where load current remains below 100 mA.

Compared with PN2222A and BC847BW, MMBT4401-13-F delivers optimal balance of 600 mA current handling, 250 MHz bandwidth, and SOT23 thermal performance - making it preferred for industrial switching where both power and speed matter.

Availability

MMBT4401-13-F is available at Aetrix Electronics and suitable for DC-DC converter bias circuits, LED constant-current drivers, and microcontroller GPIO interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MMBT4401-13-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, specializing in high-reliability components for industrial, automotive, and computing markets since 1964.

The MMBT4401 belongs to Diodes' general-purpose small-signal transistor product line, engineered for cost-effective, high-yield replacement of legacy through-hole transistors in automated SMT production environments.

FAQ

What is the maximum continuous collector current for MMBT4401-13-F at +100°C ambient?

At T_A = +100°C, the derating curve shows maximum power dissipation drops to ~0.17 W. With V_CE(sat) ≈ 0.6 V at I_C = 500 mA, the practical continuous I_C limit is ~280 mA to maintain junction temperature ≤ +150°C on a 15 mm × 15 mm PCB.

Is MMBT4401-13-F pin-compatible with the older MMBT4401-7-F?

Yes - both share identical SOT23 package, pinout (Emitter-Base-Collector), and marking code K2X. The only difference is reel size (13-inch vs. 7-inch) and tape quantity (10,000 vs. 3,000 units), with no electrical or mechanical variation.

Does MMBT4401-13-F meet AEC-Q101 stress test requirements?

No - the standard MMBT4401-13-F is not AEC-Q101 qualified. For automotive applications, Diodes offers the MMBT4401Q variant, which undergoes full AEC-Q101 testing including HTOL, TC, and ESD qualification per automotive standards.

Can MMBT4401-13-F replace BC547 in existing designs?

Yes, with verification: both are NPN transistors in TO-92 and SOT23 footprints respectively, sharing V_CEO = 45 V (BC547) / 40 V (MMBT4401), but MMBT4401 has higher I_C (600 mA vs. 100 mA) and faster switching. Layout must accommodate SOT23 pad dimensions and thermal relief.

MMBT4401-13-F 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:: Active

Transistor Type:: NPN

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

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

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

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 1V

Power - Max:: 310 mW

Frequency - Transition:: 250MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBT4401-13-F FAQ

1.How can I place an order for MMBT4401-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT4401-13-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 MMBT4401-13-F reliable?

The price and inventory of MMBT4401-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT4401-13-F is usually 5 days.

3.What payment methods are accepted for MMBT4401-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT4401-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT4401-13-F?

MMBT4401-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT4401-13-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 MMBT4401-13-F?

For technical support, including MMBT4401-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT4401-13-F requirements.

6.How does Aetrix verify that MMBT4401-13-F is sourced from the original manufacturer or authorized distributors?

All MMBT4401-13-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 MMBT4401-13-F meets industry standards.

7.What is the process for return or replacement of MMBT4401-13-F?

All MMBT4401-13-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBT4401-13-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 MMBT4401-13-F part is unused and in its original packaging.

Return procedure for MMBT4401-13-F:

1.Submit a request within 90 days.

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

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