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

STMicroelectronics MJD361T4-A

Name: MJD361T4-A
Brand: STMicroelectronics
SKU: MJD361T4-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD361T4-A

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: MJD361T4-A.pdf

Description:: TRANS PNP 60V 3A DPAK

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Product details

Overview

MJD361T4-A from STMicroelectronics is a PNP complementary power transistor in DPAK (TO-252) package, rated for 60 V V_CEO, 3 A I_C, and 15 W power dissipation at T_c = 25 °C, with low 0.9 V V_CE(sat) at 3 A/150 mA drive-used in automotive-grade DC-DC converter output stages and motor driver high-side switches.

For engineers reviewing the MJD361T4-A datasheet, MJD361T4-A pinout, MJD361T4-A application, or MJD361T4-A equivalent, key selection criteria include verified PNP polarity, TO-252 thermal resistance (8.3 °C/W), automotive qualification per AEC-Q101, and confirmed 150 °C max junction temperature under continuous conduction mode.

Technical Context

This planar "base island" PNP transistor delivers high DC current gain (h_FE = 30–100 across 200 mA–3 A) while maintaining low saturation voltage-enabling efficient switching in linear-regulator pass elements and H-bridge upper-leg drivers where base drive current and thermal headroom are constrained.

Rated for automotive use, it supports operation from –65 °C to +150 °C with guaranteed breakdown voltages (V_(BR)CEO = 60 V, V_(BR)EBO = 5 V) and low leakage (I_CBO ≤ 20 µA, I_EBO ≤ 100 µA), making it suitable for engine control unit (ECU) load switching in harsh ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - maximum collector-emitter blocking voltage with base open; defines safe operating range in 48 V automotive systems
I_C	3 A - continuous collector current at T_c = 25 °C; sets usable current limit in relay drivers and fan controllers
V_CE(sat)	0.9 V @ 3 A / 150 mA - low saturation voltage reduces conduction loss and heatsink requirements in high-current switching
h_FE	30–100 - wide DC gain range across operating current; enables stable biasing without external gain compensation
R_thj-case	8.3 °C/W - junction-to-case thermal resistance; determines minimum heatsink size needed for 15 W dissipation
T_J(max)	150 °C - maximum junction temperature; allows operation in under-hood environments without derating below 125 °C ambient

Pinout & Package

Package: DPAK (TO-252), surface-mount, thermally enhanced with exposed tab (pin 3) for direct heatsinking. Tab is electrically connected to collector.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit path; connects to load return or ground reference in high-side switch configuration
2	Base	Control input; requires ≥150 mA drive for full saturation at 3 A collector current
3 (Tab)	Collector	Main power terminal and thermal interface; must be soldered to copper pour or heatsink for thermal management

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS power stages
Low V_CE(sat)	0.9 V at full 3 A load reduces power loss by >30% vs. standard PNP transistors with 1.3 V saturation
High h_FE stability	Minimum 30 gain retained at 3 A ensures reliable turn-on margin with standard microcontroller GPIO drive
TO-252 thermal performance	8.3 °C/W R_thj-case enables 15 W dissipation with minimal external heatsinking in space-constrained modules

Applications

Automotive Engine Control

Industrial DC-DC Converter

Use Scenario: Switching 12 V fuel injector solenoids in ECU output stage under transient load conditions.

IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow into inductive load; operates in saturated switching mode with <1 µs turn-off delay.

Use Value: Low V_CE(sat) minimizes heat generation during 100% duty cycle operation; AEC-Q101 rating ensures reliability over 15-year vehicle lifetime.

Use Scenario: Regulating 5 V rail from 24 V industrial supply using linear pass element in low-noise auxiliary power module.

IC Role / Device Role / Timing Role: Linear regulator pass transistor; biased in active region for ripple suppression and fast transient response.

Use Value: High h_FE (≥60 at 1 A) simplifies base drive design; TO-252 thermal capability supports 10 W continuous dissipation without forced air.

H-Bridge Motor Driver

Power Supply OR-ing Circuit

Use Scenario: Upper-leg switch in brushed DC motor H-bridge driving 2 A stall current at 24 V.

IC Role / Device Role / Timing Role: Complementary PNP switch paired with NPN MJD360T4-A; handles reverse recovery and shoot-through immunity during PWM commutation.

Use Value: Matched V_CE(sat) and h_FE with MJD360T4-A ensures balanced conduction losses and symmetric switching timing.

Use Scenario: Diode-replacement OR-ing element in redundant 12 V power supplies for telecom shelf management.

IC Role / Device Role / Timing Role: Active PNP switch replacing Schottky diode; controlled via external comparator to enable/disable based on supply voltage priority.

Use Value: 0.9 V V_CE(sat) cuts forward drop by 40% vs. 1.5 V Schottky, reducing power loss and thermal stress in parallel supply paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBT3906LT1G	Small-signal SOT-23 (200 mA I_C, 40 V V_CEO); not power-rated	Only suitable for logic-level switching or bias networks-not for 3 A loads	Select only for signal-level inversion or low-power base drive buffering
Diodes Incorporated DXT697BK	DPAK PNP with 100 V V_CEO, 3 A I_C, but higher 1.2 V V_CE(sat) and 12.5 °C/W R_thj-case	Acceptable in higher-voltage 48 V systems but requires larger heatsink for same power	Prefer when extended voltage margin outweighs thermal efficiency needs

Compared with MJD361T4-A, MMBT3906LT1G lacks power handling and thermal capability, while DXT697BK trades lower saturation loss for reduced thermal performance-making MJD361T4-A optimal for 12–24 V automotive and industrial switching where efficiency and footprint are jointly constrained.

Availability

MJD361T4-A is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC-DC converters, H-bridge motor drivers, and redundant power supply OR-ing circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for MJD361T4-A 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

MJD361T4-A belongs to ST's automotive-qualified power transistor product line, engineered specifically for robust, thermally efficient switching in engine management, body control, and safety-critical power stages.

FAQ

Is MJD361T4-A pin-compatible with MJD360T4-A?

Yes-both share identical DPAK (TO-252) pinout: Pin 1 = emitter, Pin 2 = base, Pin 3 (tab) = collector. They are complementary NPN/PNP pairs designed for matched layout in H-bridge and push-pull circuits, with symmetrical thermal and electrical characteristics.

What is the maximum safe operating current at 100 °C case temperature?

At T_c = 100 °C, derating applies: 15 W total dissipation drops to ~9.5 W (using 8.3 °C/W R_thj-case). With V_CE(sat) ≈ 0.9 V, max continuous I_C is approximately 10.6 A × (9.5 W / 15 W) ≈ 2.1 A-verified per ST's thermal derating curve in Doc ID 16126 Rev 1, page 4.

Does MJD361T4-A require a base resistor when driven by a 3.3 V microcontroller?

Yes-a series base resistor is mandatory. With h_FE ≥ 30 at 3 A, minimum required I_B = 100 mA. A 3.3 V GPIO can deliver ~10 mA into typical 330 Ω, so external driver (e.g., ULN2003) or lower-resistance path (≤33 Ω) is needed to achieve full saturation without thermal runaway.

Can MJD361T4-A be used in avalanche mode?

No-ST does not specify or guarantee avalanche energy rating (E_AS) for MJD361T4-A. Its absolute maximum V_CEO = 60 V is strictly for DC or repetitive pulse operation; inductive switching must include clamping (e.g., snubber or freewheeling diode) to prevent destructive breakdown.

MJD361T4-A Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 900mV @ 150mA, 3A

Current - Collector Cutoff (Max):: 20µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 1A, 4V

Power - Max:: 15 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MJD361T4-A FAQ

1.How can I place an order for MJD361T4-A through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD361T4-A 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 MJD361T4-A reliable?

The price and inventory of MJD361T4-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD361T4-A is usually 5 days.

3.What payment methods are accepted for MJD361T4-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD361T4-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD361T4-A?

MJD361T4-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD361T4-A 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 MJD361T4-A?

For technical support, including MJD361T4-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD361T4-A requirements.

6.How does Aetrix verify that MJD361T4-A is sourced from the original manufacturer or authorized distributors?

All MJD361T4-A 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 MJD361T4-A meets industry standards.

7.What is the process for return or replacement of MJD361T4-A?

All MJD361T4-A units undergo pre-shipment inspection (PSI). If there is an issue with MJD361T4-A, 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 MJD361T4-A part is unused and in its original packaging.

Return procedure for MJD361T4-A:

1.Submit a request within 90 days.

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

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