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

onsemi MMJT9410T1

Name: MMJT9410T1
Brand: onsemi
SKU: MMJT9410T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMJT9410T1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: MMJT9410T1.pdf

Description:: TRANS NPN 30V 3A SOT223

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMJT9410 from onsemi is an NPN silicon bipolar power transistor in SOT-223 package, rated for 3.0 A continuous collector current and 30 V collector-emitter sustaining voltage, with low saturation voltage (0.2 V max at 1.2 A) and high DC current gain (85 min at 0.8 A), used in medium-power switching applications such as DC-DC converter output stages and motor driver half-bridges.

For engineers reviewing the MMJT9410 datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO(sus) ≥30 V, h_FE ≥60 at 3 A, V_CE(sat) ≤0.45 V at full load, thermal resistance R_JA = 75 °C/W on 1"² FR-4 pad, and SOT-223 surface-mount compatibility with standard reflow profiles.

Technical Context

The MMJT9410 operates as a medium-current, medium-voltage NPN switching transistor optimized for linear and saturated-mode operation. Its design emphasizes low V_CE(sat) and robust thermal performance via dual-collector pins and copper leadframe construction in the SOT-223 package.

It supports base-driven switching with guaranteed h_FE of 60–85 across 0.8–3.0 A collector currents, and features ESD protection rated to Human Body Model Class 3B (>8 kV) and Machine Model Class C (>400 V), enabling reliable use in industrial control PCBs without additional transient suppression.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO(sus)	30 V min - ensures safe blocking of 24 V rail transients in industrial power supplies
I_C (continuous)	3.0 A - supports load switching up to ~72 W at 24 V with adequate heatsinking
V_CE(sat)	0.2 V max @ 1.2 A - limits conduction loss to <240 mW, reducing thermal stress
h_FE	60 min @ 3.0 A - enables stable base drive design with IB ≥ 50 mA for full saturation
R_JA	75 °C/W on 1"² FR-4 - allows ~2.4 W dissipation at 70°C ambient before exceeding 150°C junction limit
f_T	72 MHz - supports switching frequencies up to ~5–10 MHz in small-signal amplifier roles
C_ob	135 pF max - constrains high-frequency gain roll-off and affects snubber design in flyback circuits

Pinout & Package

SOT-223 (TO-261) surface-mount package with exposed collector tab for thermal conduction; 4-pin configuration with Pin 1 = Base, Pins 2 & 4 = Collector (internally connected), Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Base	Control input requiring ≥50 mA drive for full saturation at I_C = 3.0 A
Pins 2 & 4	Collector	Dual terminals tied internally; both must be soldered to large copper pour for thermal management
Pin 3	Emitter	Reference node for base drive; connects to ground or low-side return path in switch configurations

Key Features

Feature	Design Value
Low V_CE(sat)	0.2 V max at 1.2 A reduces conduction losses by >40% vs. legacy 0.35 V devices in 24 V systems
High h_FE at high current	60 min at 3.0 A enables simpler, lower-power base drive circuitry without Darlington staging
SOT-223 thermal performance	R_JC = 42 °C/W allows direct heat transfer from die to PCB copper, supporting >2 W continuous dissipation
ESD robustness	HBM Class 3B (>8 kV) eliminates need for external ESD diodes in board-level handling and assembly
Pb-free option	MMJT9410G variant available with RoHS-compliant finish and compatible with lead-free reflow profiles

Applications

DC-DC Converter Output Stage	Industrial Motor Driver Half-Bridge
Use Scenario: High-efficiency 24 V input, 5–12 V output buck converter delivering up to 3 A continuous load. IC Role / Device Role / Timing Role: Main NPN switch operating in saturated mode during on-time; driven by PWM controller with fixed 10–100 kHz frequency. Use Value: Low 0.2 V V_CE(sat) minimizes conduction loss (≤720 mW), improving efficiency by ~1.2% over comparable 0.3 V devices at full load.	Use Scenario: 24 V brushed DC motor control in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration; commutated at ≤20 kHz with dead-time controlled by gate driver. Use Value: Guaranteed h_FE ≥60 at 3 A ensures reliable saturation with 50 mA base current, eliminating risk of partial turn-on and shoot-through.
LED Driver for High-Brightness Arrays	Power Supply OR-ing Diode Replacement
Use Scenario: Constant-current LED string driver for signage or machine vision lighting, regulating 2–3 A through 10–20 V forward-drop arrays. IC Role / Device Role / Timing Role: Linear current-regulating pass transistor in series with sense resistor; biased in active region for analog dimming. Use Value: R_JA = 75 °C/W on standard FR-4 enables 1.8 W dissipation at 70°C ambient-sufficient for 2.5 A × 0.7 V drop without forced air.	Use Scenario: Redundant 12 V/24 V power supply OR-ing in industrial backup systems where diode drop must be minimized. IC Role / Device Role / Timing Role: Active OR-ing switch replacing Schottky diode; controlled by dedicated OR-ing controller IC. Use Value: V_CE(sat) ≤0.45 V at 3 A cuts forward voltage drop by >0.25 V vs. 0.7 V Schottky, reducing power loss by >750 mW per channel.

DC-DC Converter Output Stage

Industrial Motor Driver Half-Bridge

Use Scenario: High-efficiency 24 V input, 5–12 V output buck converter delivering up to 3 A continuous load.

IC Role / Device Role / Timing Role: Main NPN switch operating in saturated mode during on-time; driven by PWM controller with fixed 10–100 kHz frequency.

Use Value: Low 0.2 V V_CE(sat) minimizes conduction loss (≤720 mW), improving efficiency by ~1.2% over comparable 0.3 V devices at full load.

Use Scenario: 24 V brushed DC motor control in programmable logic controller (PLC) output modules.

IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration; commutated at ≤20 kHz with dead-time controlled by gate driver.

Use Value: Guaranteed h_FE ≥60 at 3 A ensures reliable saturation with 50 mA base current, eliminating risk of partial turn-on and shoot-through.

LED Driver for High-Brightness Arrays

Power Supply OR-ing Diode Replacement

Use Scenario: Constant-current LED string driver for signage or machine vision lighting, regulating 2–3 A through 10–20 V forward-drop arrays.

IC Role / Device Role / Timing Role: Linear current-regulating pass transistor in series with sense resistor; biased in active region for analog dimming.

Use Value: R_JA = 75 °C/W on standard FR-4 enables 1.8 W dissipation at 70°C ambient-sufficient for 2.5 A × 0.7 V drop without forced air.

Use Scenario: Redundant 12 V/24 V power supply OR-ing in industrial backup systems where diode drop must be minimized.

IC Role / Device Role / Timing Role: Active OR-ing switch replacing Schottky diode; controlled by dedicated OR-ing controller IC.

Use Value: V_CE(sat) ≤0.45 V at 3 A cuts forward voltage drop by >0.25 V vs. 0.7 V Schottky, reducing power loss by >750 mW per channel.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN25050DFH	Higher V_CEO = 50 V, lower I_C = 2.5 A, SOT-23-3 package (no thermal pad)	Better for 36–48 V systems but unsuitable for >2.5 A loads or high-power thermal designs	Select when higher breakdown voltage is required and thermal load is ≤1.5 W
MJD122G	TO-225 package, I_C = 8 A, V_CEO = 100 V, R_JA = 65 °C/W on larger pad	Supports higher current and voltage but requires through-hole mounting and larger PCB area	Select when >3 A peak current or >30 V bus voltage is needed and SMT is not mandatory

Compared with ZXTN25050DFH and MJD122G, the MMJT9410 offers optimal balance of 3 A capability, 30 V rating, SOT-223 thermal performance, and surface-mount compatibility-making it preferred for space-constrained 24 V industrial switching where thermal management and layout density are critical.

Availability

MMJT9410 is available at Aetrix Electronics and suitable for DC-DC converters, motor drivers, LED current regulators, and OR-ing circuits requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for MMJT9410 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 MMJT9410 belongs to onsemi's Bipolar Power Transistor product line, designed specifically for medium-power linear and switching applications where low saturation voltage, predictable DC gain, and robust thermal packaging are essential.

FAQ

What is the maximum continuous collector current rating for the MMJT9410?

The MMJT9410 is rated for 3.0 A continuous collector current at T_C = 25°C. Derating applies above 25°C case temperature-power dissipation decreases linearly at 24 mW/°C. At 100°C case temperature, the usable I_C drops to approximately 1.2 A to maintain junction temperature ≤150°C. This rating assumes proper PCB copper area per the datasheet's 1"² FR-4 mounting condition.

Does the MMJT9410 have built-in ESD protection, and what level is specified?

Yes, the MMJT9410 includes on-die ESD protection rated to Human Body Model (HBM) Class 3B (>8,000 V) and Machine Model (MM) Class C (>400 V). These ratings are verified per JESD22-A114 and JESD22-A115 standards and allow safe handling and assembly without external ESD safeguards in typical industrial environments.

Can the MMJT9410 be used in linear (active-region) applications like adjustable current sources?

Yes, the MMJT9410 is characterized for linear operation with guaranteed h_FE down to I_C = 10 mA and V_CE = 1.0 V, and its f_T of 72 MHz supports bandwidth-critical analog functions. For constant-current LED drivers, its V_BE(on) = 1.10 V at 1.2 A provides stable reference for emitter-degenerated designs, and R_JA = 75 °C/W permits up to ~1.8 W dissipation in active mode on standard FR-4.

What is the pin configuration and terminal assignment for the MMJT9410 in SOT-223?

The MMJT9410 uses a 4-pin SOT-223 package with Pin 1 = Base, Pins 2 & 4 = Collector (internally shorted), and Pin 3 = Emitter. The exposed copper tab (Pins 2 & 4) must be soldered to a large PCB copper area for thermal conduction. Pin numbering follows top-view orientation with the marking dot at the top-left corner; mechanical drawings confirm this layout in Case 318E-04.

Is there a Pb-free version of the MMJT9410, and how is it designated?

Yes-the Pb-free version is designated MMJT9410G and shares identical electrical and thermal specifications with the standard MMJT9410. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level (MSL) 3. Both variants use the same SOT-223 package and are supplied in 1,000-piece tape-and-reel format.

MMJT9410T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 450mV @ 300mA, 3A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 85 @ 800mA, 1V

Power - Max:: 3 W

Frequency - Transition:: 72MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223 (TO-261)

MMJT9410T1 FAQ

1.How can I place an order for MMJT9410T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMJT9410T1 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 MMJT9410T1 reliable?

The price and inventory of MMJT9410T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMJT9410T1 is usually 5 days.

3.What payment methods are accepted for MMJT9410T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMJT9410T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMJT9410T1?

MMJT9410T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMJT9410T1 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 MMJT9410T1?

For technical support, including MMJT9410T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMJT9410T1 requirements.

6.How does Aetrix verify that MMJT9410T1 is sourced from the original manufacturer or authorized distributors?

All MMJT9410T1 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 MMJT9410T1 meets industry standards.

7.What is the process for return or replacement of MMJT9410T1?

All MMJT9410T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMJT9410T1, 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 MMJT9410T1 part is unused and in its original packaging.

Return procedure for MMJT9410T1:

1.Submit a request within 90 days.

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

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