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

onsemi MJD42CG

Name: MJD42CG
Brand: onsemi
SKU: MJD42CG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD42CG

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MJD42CG.pdf

Description:: TRANS PNP 100V 6A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MJD42CG from onsemi is a PNP complementary power transistor in DPAK (TO-252) package, rated for 100 V_CEO, 6 A continuous collector current, and 20 W power dissipation at T_C = 25°C. It serves as a general-purpose amplifier and low-speed switching device in industrial power supplies, motor drivers, and linear regulators.

For engineers reviewing the MJD42CG datasheet, pinout, applications, or equivalent options, key selection criteria include its V_CEO = 100 V, I_C = 6 A, V_CE(sat) ≤ 1.5 V at I_C = 6 A / I_B = 600 mA, h_FE ≥ 15 at I_C = 3 A, and thermal resistance R_JC = 6.25 °C/W - all critical for thermal-aware discrete power stage design.

Technical Context

The MJD42CG is a silicon planar epitaxial PNP bipolar junction transistor optimized for surface-mount operation in DPAK-3 (Case 369C). Its complementary pairing with MJD41C enables push-pull and H-bridge configurations without cross-conduction risk under matched biasing.

It operates within −65°C to +150°C junction temperature range, supports DC and pulsed switching up to 10 A peak, and exhibits f_T = 3 MHz typical at I_C = 500 mA - confirming suitability for audio-frequency amplification and <100 kHz switching applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 Vdc - Maximum safe collector-emitter voltage before breakdown; defines maximum rail voltage in linear regulator or switch-mode output stages.
I_C (continuous)	6 Adc - Continuous collector current rating at T_C = 25°C; determines usable current capacity in thermally managed PCB layouts.
V_CE(sat)	≤1.5 Vdc at I_C = 6 A, I_B = 600 mA - Low saturation voltage minimizes conduction loss in switching applications.
h_FE	15–75 - DC current gain range across operating conditions; informs base drive sizing for reliable saturation at target load currents.
R_JC	6.25 °C/W - Junction-to-case thermal resistance; used with heatsink interface data to calculate maximum allowable power at given case temperature.
f_T	3 MHz - Current gain-bandwidth product; confirms usable frequency limit for small-signal amplification and moderate-speed switching.
P_D @ T_C = 25°C	20 W - Maximum power dissipation at case temperature of 25°C; derates linearly above 25°C at 0.16 W/°C.

Pinout & Package

DPAK-3 (Case 369C) surface-mount package: 6.10 mm × 6.54 mm × 2.28 mm body with exposed drain pad (pin 2 & 4) for thermal conduction. Pin 1 is Base, pin 3 is Emitter, pins 2 and 4 are internally connected Collector terminals - enabling dual-source thermal path and high-current routing.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to turn on.
2 & 4	Collector	Internally tied collector terminals; both must be soldered to same high-current copper pour for optimal thermal and electrical performance.
3	Emitter	Common reference terminal for PNP configuration; typically connected to positive supply rail in high-side switch topologies.

Key Features

Feature	Design Value
Pb-free and RoHS compliant	Meets global environmental compliance requirements without lead-based solder compatibility compromises.
AEC-Q101 qualified (NJV variants)	Validated for automotive-grade reliability; MJD42CG itself is industrial-grade but shares identical die and process.
UL 94 V-0 epoxy	Flame-retardant encapsulation ensures safety compliance in enclosed power equipment.
Electrically similar to TIP42 series	Enables drop-in replacement in legacy designs originally using through-hole TIP42C, with improved thermal performance via DPAK mounting.
Surface-mount lead form	Optimized for automated assembly; straight-lead version available with "1" suffix for selective soldering processes.

Applications

Industrial Linear Regulators	DC Motor Control Circuits
Use Scenario: High-current series pass element in adjustable 3–30 V, 0–5 A linear regulators for test equipment and lab power supplies. IC Role / Device Role / Timing Role: PNP pass transistor regulating output voltage by modulating emitter-collector current under op-amp feedback control. Use Value: V_CEO = 100 V allows >30 V input headroom; R_JC = 6.25 °C/W enables stable 5 A operation with minimal heatsink volume.	Use Scenario: Low-side driver in bidirectional brushed DC motor H-bridge using complementary MJD41C/MJD42CG pairs. IC Role / Device Role / Timing Role: PNP switch controlling motor current direction during reverse phase; paired with NPN for synchronous commutation. Use Value: I_C = 6 A and V_CE(sat) ≤ 1.5 V ensure <9 W conduction loss at full load; f_T = 3 MHz supports PWM up to ~50 kHz.
Audio Power Amplifiers	High-Voltage Switch-Mode Supplies
Use Scenario: Complementary output stage in Class AB audio amplifiers delivering 20–50 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor sourcing current to speaker load during negative half-cycle of audio waveform. Use Value: h_FE ≥ 15 at I_C = 3 A ensures predictable bias stability; SOA curve supports 100 V/5 A pulses within safe thermal limits.	Use Scenario: Main switch in flyback or forward converter auxiliary bias winding rectifier or primary-side snubber clamp. IC Role / Device Role / Timing Role: PNP clamp transistor dissipating leakage energy during MOSFET off-time in high-voltage (>60 V) SMPS designs. Use Value: V_CEO = 100 V withstands reflected spikes; ICEO ≤ 50 µA ensures low standby loss; robust second-breakdown SOA prevents failure under transient overloads.

Industrial Linear Regulators

DC Motor Control Circuits

Use Scenario: High-current series pass element in adjustable 3–30 V, 0–5 A linear regulators for test equipment and lab power supplies.

IC Role / Device Role / Timing Role: PNP pass transistor regulating output voltage by modulating emitter-collector current under op-amp feedback control.

Use Value: V_CEO = 100 V allows >30 V input headroom; R_JC = 6.25 °C/W enables stable 5 A operation with minimal heatsink volume.

Use Scenario: Low-side driver in bidirectional brushed DC motor H-bridge using complementary MJD41C/MJD42CG pairs.

IC Role / Device Role / Timing Role: PNP switch controlling motor current direction during reverse phase; paired with NPN for synchronous commutation.

Use Value: I_C = 6 A and V_CE(sat) ≤ 1.5 V ensure <9 W conduction loss at full load; f_T = 3 MHz supports PWM up to ~50 kHz.

Audio Power Amplifiers

High-Voltage Switch-Mode Supplies

Use Scenario: Complementary output stage in Class AB audio amplifiers delivering 20–50 W into 4–8 Ω loads.

IC Role / Device Role / Timing Role: PNP output transistor sourcing current to speaker load during negative half-cycle of audio waveform.

Use Value: h_FE ≥ 15 at I_C = 3 A ensures predictable bias stability; SOA curve supports 100 V/5 A pulses within safe thermal limits.

Use Scenario: Main switch in flyback or forward converter auxiliary bias winding rectifier or primary-side snubber clamp.

IC Role / Device Role / Timing Role: PNP clamp transistor dissipating leakage energy during MOSFET off-time in high-voltage (>60 V) SMPS designs.

Use Value: V_CEO = 100 V withstands reflected spikes; ICEO ≤ 50 µA ensures low standby loss; robust second-breakdown SOA prevents failure under transient overloads.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD42CT4G	Same die and specs; differs only in tape-and-reel packaging (2500 units/reel vs. 75-unit rail).	No functional difference; selected when automated SMT placement requires reel format.	Preferred for high-volume production; MJD42CG remains optimal for prototyping and low-volume builds.
TIP42C	Through-hole TO-220 package; identical V_CEO, I_C, and h_FE ratings but higher R_JA (62.5 °C/W vs. 71.4 °C/W for MJD42CG).	Requires drilled PCB and manual soldering; less suitable for compact, thermally dense layouts.	Use only when legacy board compatibility or hand-soldering constraints prohibit surface-mount adoption.

Compared with MJD42CT4G, MJD42CG offers identical electrical performance in rail packaging for flexibility in evaluation and small-batch use; versus TIP42C, it delivers superior thermal performance in DPAK while maintaining direct functional equivalence for new designs targeting surface-mount efficiency.

Availability

MJD42CG is available at Aetrix Electronics and suitable for industrial linear regulators, DC motor control circuits, and audio power amplifiers requiring stable component supply with consistent parametric performance across production lots.

Supply support for MJD42CG 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 MJD42CG belongs to onsemi's complementary power transistor family designed for cost-sensitive, thermally constrained surface-mount applications where reliability, manufacturability, and legacy compatibility are critical.

FAQ

What is the pin configuration of the MJD42CG?

The MJD42CG uses a DPAK-3 (Case 369C) package with four terminals: Pin 1 is Base, Pins 2 and 4 are internally connected Collector leads, and Pin 3 is Emitter. This dual-collector layout improves thermal conduction and current handling. The MJD42CG datasheet confirms this pinout in the mechanical outline and marking diagram sections.

Is the MJD42CG RoHS compliant and lead-free?

Yes, the MJD42CG is Pb-free and RoHS compliant, as explicitly stated in the onsemi datasheet under Features and Ordering Information. The "G" suffix in MJD42CG denotes the Pb-free package, and the epoxy meets UL 94 V-0 flammability standards.

Can the MJD42CG replace the TIP42C in existing designs?

The MJD42CG is electrically similar to the TIP42C and shares identical V_CEO, I_C, and h_FE ratings, but it uses a surface-mount DPAK package instead of through-hole TO-220. While not pin-compatible, it serves as a functional upgrade for new designs seeking better thermal performance and automated assembly - the MJD42CG requires PCB redesign but delivers lower R_JA and higher power density.

What is the maximum junction temperature for the MJD42CG?

The MJD42CG has an operating junction temperature range of −65°C to +150°C, as specified in the Maximum Ratings table. This wide range supports deployment in harsh environments such as industrial motor drives and outdoor power equipment where ambient temperatures exceed 85°C.

Does the MJD42CG have automotive qualification?

The standard MJD42CG is not AEC-Q101 qualified; however, the NJVMJD42C variant (with NJV prefix) is AEC-Q101 qualified and PPAP capable. Both share identical die and electrical specifications - the NJV prefix indicates automotive-specific site controls and change management, making it the appropriate choice for automotive applications requiring formal qualification.

MJD42CG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tube

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 6 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 600mA, 6A

Current - Collector Cutoff (Max):: 50µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 15 @ 3A, 4V

Power - Max:: 1.75 W

Frequency - Transition:: 3MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

MJD42CG FAQ

1.How can I place an order for MJD42CG through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD42CG 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 MJD42CG reliable?

The price and inventory of MJD42CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD42CG is usually 5 days.

3.What payment methods are accepted for MJD42CG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD42CG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD42CG?

MJD42CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD42CG 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 MJD42CG?

For technical support, including MJD42CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD42CG requirements.

6.How does Aetrix verify that MJD42CG is sourced from the original manufacturer or authorized distributors?

All MJD42CG 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 MJD42CG meets industry standards.

7.What is the process for return or replacement of MJD42CG?

All MJD42CG units undergo pre-shipment inspection (PSI). If there is an issue with MJD42CG, 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 MJD42CG part is unused and in its original packaging.

Return procedure for MJD42CG:

1.Submit a request within 90 days.

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

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