Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi MMBT5401LT3

Name: MMBT5401LT3
Brand: onsemi
SKU: MMBT5401LT3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MMBT5401LT3

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MMBT5401LT3.pdf

Description:: TRANS PNP 150V 0.5A SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,277

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MMBT5401LT3 from onsemi is a PNP silicon small-signal transistor rated for −150 V_CEO, −500 mA continuous collector current, and 100–300 MHz f_T, housed in an SOT-23 package. It serves as a high-voltage switching or amplification device in power management, relay drivers, and voltage-level translation circuits where robust breakdown margin and automotive-grade reliability are required.

For engineers reviewing the MMBT5401LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include verified −150 V_CEO rating, AEC-Q101 qualification, SOT-23 thermal performance (225 mW on FR-5), h_FE range of 50–240 at −1.0 to −50 mA, and confirmed V_CE(sat) ≤ −0.5 V at −50 mA/−5 mA drive.

Technical Context

This PNP transistor operates with a maximum V_CBO of −160 Vdc and V_EBO of −5.0 Vdc, supporting high-side switching in off-line or industrial supply rails. Its f_T of 100–300 MHz enables stable operation in medium-frequency amplifier stages and fast-switching applications up to ~100 ns turn-off time at V_CC = 120 V.

Thermal design is constrained by R_JA = 556 °C/W on FR-5 board and 417 °C/W on alumina substrate, with derating slopes of 1.8 mW/°C and 2.4 mW/°C respectively. Junction temperature range spans −55°C to +150°C, validated under AEC-Q101 stress conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−150 Vdc - supports switching in 100–120 V AC-derived rails without avalanche conduction
I_C (continuous)	−500 mAdc - drives relays, LEDs, or logic-level translators with margin above typical −100 mA loads
f_T	100–300 MHz - enables use in RF preamps or broadband analog signal paths up to ~100 MHz
V_CE(sat)	≤ −0.5 V at I_C = −50 mA, I_B = −5 mA - ensures low conduction loss in saturated switch mode
h_FE	50–240 at I_C = −1.0 to −50 mA - provides predictable DC gain across bias points for linear or switching bias design
C_obo	≤ 6.0 pF at V_CB = −10 V - minimizes Miller capacitance impact in high-speed switching nodes

Pinout & Package

SOT-23 (TO-236) package, case 318, style 6; 3-pin surface-mount plastic package with gull-wing leads, 1.9 mm pitch, and 2.9 mm × 1.3 mm footprint. RoHS-compliant, Pb-free, halogen-free/BFR-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input for forward-active or saturation bias; requires current-limited drive to achieve specified h_FE and V_CE(sat)
2	Emitter	Common terminal for PNP configuration; connected to higher potential rail in high-side switch topology
3	Collector	Output terminal; sinks current to load when base is forward-biased; rated for −150 V reverse blocking

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and ESD
High V_CBO (−160 V)	Enables safe operation in flyback snubber networks and inductive load switching with >10 V safety margin
Low C_obo (≤6.0 pF)	Reduces switching losses and improves stability in high-frequency amplifier feedback paths
Wide T_J range (−55°C to +150°C)	Supports deployment in under-hood automotive modules and industrial motor control enclosures
RoHS/Pb-free/halogen-free	Meets global environmental compliance mandates without requiring special assembly or reflow profiles

Applications

Automotive Door Module	Industrial Relay Driver
Use Scenario: Driving window lift motor relays in body control units exposed to −40°C to +105°C ambient. IC Role / Device Role / Timing Role: High-side PNP switch controlling 12 V relay coil with reverse-polarity protection. Use Value: −150 V_CEO withstands load-dump transients; AEC-Q101 qualification ensures field reliability over 15-year vehicle life.	Use Scenario: Isolating PLC output signals to 24 V DC solenoid valves in factory automation cabinets. IC Role / Device Role / Timing Role: Level-shifting interface between 3.3 V microcontroller GPIO and 24 V inductive load. Use Value: V_CE(sat) ≤ −0.5 V minimizes heat rise at 100 mA drive; SOT-23 footprint enables dense PCB layout.
AC-DC Auxiliary Supply	LED String Current Sink
Use Scenario: Regulating standby bias current in offline SMPS auxiliary windings delivering 15 V at 50 mA. IC Role / Device Role / Timing Role: Linear pass transistor in shunt-regulated auxiliary supply with Zener reference. Use Value: h_FE ≥ 50 at −10 mA ensures stable regulation; −160 V_CBO prevents breakdown during primary-side ringing.	Use Scenario: Constant-current sink for indicator LEDs in medical equipment front panels operating at 5 V rail. IC Role / Device Role / Timing Role: Saturated switch controlling LED cathode path to ground with PWM dimming. Use Value: Low V_CE(sat) reduces power dissipation below 50 mW at 20 mA; SOT-23 allows placement adjacent to LEDs.

Automotive Door Module

Industrial Relay Driver

Use Scenario: Driving window lift motor relays in body control units exposed to −40°C to +105°C ambient.

IC Role / Device Role / Timing Role: High-side PNP switch controlling 12 V relay coil with reverse-polarity protection.

Use Value: −150 V_CEO withstands load-dump transients; AEC-Q101 qualification ensures field reliability over 15-year vehicle life.

Use Scenario: Isolating PLC output signals to 24 V DC solenoid valves in factory automation cabinets.

IC Role / Device Role / Timing Role: Level-shifting interface between 3.3 V microcontroller GPIO and 24 V inductive load.

Use Value: V_CE(sat) ≤ −0.5 V minimizes heat rise at 100 mA drive; SOT-23 footprint enables dense PCB layout.

AC-DC Auxiliary Supply

LED String Current Sink

Use Scenario: Regulating standby bias current in offline SMPS auxiliary windings delivering 15 V at 50 mA.

IC Role / Device Role / Timing Role: Linear pass transistor in shunt-regulated auxiliary supply with Zener reference.

Use Value: h_FE ≥ 50 at −10 mA ensures stable regulation; −160 V_CBO prevents breakdown during primary-side ringing.

Use Scenario: Constant-current sink for indicator LEDs in medical equipment front panels operating at 5 V rail.

IC Role / Device Role / Timing Role: Saturated switch controlling LED cathode path to ground with PWM dimming.

Use Value: Low V_CE(sat) reduces power dissipation below 50 mW at 20 mA; SOT-23 allows placement adjacent to LEDs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC807-40LT1G	V_CEO = −45 V, h_FE = 250–630, f_T = 100 MHz - lower voltage rating, higher gain	Not suitable for >60 V rail applications; better for low-voltage logic interfacing	Select only if system max V_CE < 40 V and higher h_FE is critical
PN2907A	V_CEO = −60 V, TO-92 package, PD = 625 mW - larger package, lower voltage, higher power dissipation	Requires through-hole mounting; unsuitable for automated SMT lines or space-constrained boards	Choose only for prototyping or legacy through-hole designs needing higher thermal mass

Compared with BC807-40LT1G and PN2907A, the MMBT5401LT3 uniquely delivers −150 V_CEO in SOT-23 with AEC-Q101 qualification-making it the only option among the three for automotive high-side switching above 100 V with surface-mount scalability.

Availability

MMBT5401LT3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial relay interfaces, and AC-DC auxiliary supplies requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for MMBT5401LT3 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MMBT5401LT3 belongs to onsemi's high-voltage bipolar transistor product line, engineered for robust switching and amplification in harsh-environment applications where voltage margin, thermal stability, and automotive qualification are mandatory.

FAQ

What is the maximum collector-emitter voltage rating for the MMBT5401LT3?

The MMBT5401LT3 has a guaranteed minimum V_(BR)CEO of −150 Vdc at I_C = −1.0 mAdc and I_B = 0. This rating is validated per JEDEC JESD22-A114 and applies across the full −55°C to +150°C junction temperature range. The MMBT5401LT3 must not be operated beyond this limit to ensure reliable long-term performance.

Is the MMBT5401LT3 qualified for automotive applications?

Yes, the MMBT5401LT3 is AEC-Q101 qualified and PPAP capable. The NSV prefix variant (NSVMMBT5401LT3G) explicitly denotes automotive-grade manufacturing controls, including site-specific process validation, lot traceability, and extended reliability testing per AEC-Q101 Rev D. The MMBT5401LT3 meets these requirements as part of the same qualified family.

What is the thermal resistance of the MMBT5401LT3 on a standard FR-5 PCB?

The MMBT5401LT3 exhibits a thermal resistance of R_JA = 556 °C/W when mounted on a 1.0 × 0.75 × 0.062 inch FR-5 board at T_A = 25°C. This value assumes no copper pour or thermal vias. Derating is required at 1.8 mW/°C above 25°C ambient, limiting usable power dissipation to 225 mW at room temperature.

Does the MMBT5401LT3 have a documented current gain (h_FE) range?

Yes, the MMBT5401LT3 specifies h_FE min/max values across three operating points: 50–240 at I_C = −1.0 mAdc, 60–200 at I_C = −10 mAdc, and 50–150 at I_C = −50 mAdc-all measured at V_CE = −5.0 Vdc and T_A = 25°C. These ranges are guaranteed per onsemi's production test flow and appear in the official MMBT5401L datasheet Rev. 14.

What is the pin configuration of the MMBT5401LT3 in the SOT-23 package?

The MMBT5401LT3 uses standard SOT-23 pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This mapping is confirmed in the "MARKING DIAGRAM" and "PACKAGE DIMENSIONS" sections of the onsemi datasheet (MMBT5401LT1/D, Rev. 14), and matches the mechanical drawing CASE 318–08, STYLE 6.

MMBT5401LT3 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 150 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 5mA, 50mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 10mA, 5V

Power - Max:: 300 mW

Frequency - Transition:: 300MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

MMBT5401LT3 FAQ

1.How can I place an order for MMBT5401LT3 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT5401LT3 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 MMBT5401LT3 reliable?

The price and inventory of MMBT5401LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT5401LT3 is usually 5 days.

3.What payment methods are accepted for MMBT5401LT3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT5401LT3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT5401LT3?

MMBT5401LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT5401LT3 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 MMBT5401LT3?

For technical support, including MMBT5401LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT5401LT3 requirements.

6.How does Aetrix verify that MMBT5401LT3 is sourced from the original manufacturer or authorized distributors?

All MMBT5401LT3 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 MMBT5401LT3 meets industry standards.

7.What is the process for return or replacement of MMBT5401LT3?

All MMBT5401LT3 units undergo pre-shipment inspection (PSI). If there is an issue with MMBT5401LT3, 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 MMBT5401LT3 part is unused and in its original packaging.

Return procedure for MMBT5401LT3:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…