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

onsemi MJD2955-1G

Name: MJD2955-1G
Brand: onsemi
SKU: MJD2955-1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MJD2955-1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: MJD2955-1G.pdf

Description:: TRANS PNP 60V 10A IPAK

Quantity:: RFQ Add To RFQ list

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Inventory:7,991

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Product details

Overview

MJD2955-1G from onsemi is a Pb-free, surface-mount PNP silicon power transistor in IPAK (Case 369D) package, rated for 60 V_CEO, 10 A_C, and 20 W at T_C = 25 °C, designed for general-purpose amplification and low-speed switching in industrial power supplies and motor control circuits.

For engineers reviewing the MJD2955-1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal characteristics, complementary pairing context with MJD3055, and discontinued status awareness for BOM continuity planning.

Technical Context

The MJD2955-1G operates as a medium-power PNP bipolar junction transistor with DC current gain (h_FE) of 20–100 at I_C = 4 A and V_CE = 4 V, collector-emitter saturation voltage (V_CE(sat)) ≤ 1.1 V at I_C = 10 A / I_B = 3.3 A, and f_T = 2 MHz under specified test conditions.

It features a maximum junction temperature of +150 °C, thermal resistance R_JC = 6.25 °C/W, and R_JA = 71.4 °C/W when mounted on minimum recommended pads - confirming its suitability for thermally constrained PCB layouts requiring discrete power switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 Vdc - Maximum safe collector-emitter voltage before breakdown; defines upper rail limit in linear or switching applications.
I_C	10 Adc - Continuous collector current rating; sets peak load-handling capability in driver stages or regulator pass elements.
P_D @ T_C = 25 °C	20 W - Total power dissipation at case temperature 25 °C; requires heatsinking above ambient to sustain full current.
h_FE	20–100 - DC current gain range at I_C = 4 A / V_CE = 4 V; determines base drive requirements for saturation.
V_CE(sat)	≤1.1 V @ I_C = 10 A, I_B = 3.3 A - Low saturation voltage minimizes conduction loss in switching applications.
R_JC	6.25 °C/W - Junction-to-case thermal resistance; enables direct heatsink mounting without thermal interface layer degradation.

Pinout & Package

Package: IPAK (Case 369D), surface-mount, Pb-free, UL 94 V-0 compliant epoxy housing.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased PNP operation; requires negative bias relative to emitter to turn on.
2, 4	Collector	Common high-current output terminal (dual-pin connection); electrically tied internally for enhanced current handling and thermal path.
3	Emiter	Reference terminal and primary current source; connected to positive supply rail in typical common-emitter switch configuration.

Key Features

Feature	Design Value
Lead-formed IPAK package	Straight-lead variant (-1 suffix) optimized for automated placement and reflow soldering without lead bending.
High current gain-bandwidth product	f_T = 2 MHz supports stable operation up to audio-frequency switching and moderate-speed PWM control.
Thermal robustness	R_JC = 6.25 °C/W enables efficient heat transfer to external heatsinks in compact industrial enclosures.
AEC-Q101 qualified variant available	NJV-prefix versions meet automotive stress testing standards; MJD2955-1G itself is industrial-grade but shares identical die.

Applications

DC Power Supply Regulation	Linear Voltage Regulator Pass Element
Use Scenario: Used as series pass transistor in adjustable linear regulators delivering up to 10 A at 5–24 V output. IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via base-emitter bias; operates in linear region with continuous conduction. Use Value: Low V_CE(sat) and high h_FE reduce base drive complexity and improve regulation efficiency at high load currents.	Use Scenario: Integrated into lab-grade bench power supplies requiring precise low-noise, ripple-free outputs. IC Role / Device Role / Timing Role: Primary current-handling transistor in feedback-controlled series regulation loop; dissipates excess input-output differential power. Use Value: 20 W power rating and 150 °C max junction temperature support sustained operation under worst-case dropout conditions.
Industrial Motor Control	Relay/Contactor Driver Stage
Use Scenario: Driving small DC motors (≤1/4 HP) in factory automation systems using H-bridge or single-ended configurations. IC Role / Device Role / Timing Role: Low-speed switching element in half-bridge leg; commutates motor current with <10 kHz PWM frequency. Use Value: Safe operating area (SOA) curves validated to 1 ms pulses support reliable start-up surge current handling without second breakdown.	Use Scenario: Amplifying microcontroller GPIO signals to energize 12–24 VDC industrial relays and contactors. IC Role / Device Role / Timing Role: High-current interface transistor providing isolation and current gain between logic-level controller and inductive load. Use Value: Emitter-base voltage rating of 5 Vdc ensures compatibility with standard 3.3 V/5 V logic families; built-in ESD protection (HBM Class 3B) improves system-level robustness.

DC Power Supply Regulation

Linear Voltage Regulator Pass Element

Use Scenario: Used as series pass transistor in adjustable linear regulators delivering up to 10 A at 5–24 V output.

IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via base-emitter bias; operates in linear region with continuous conduction.

Use Value: Low V_CE(sat) and high h_FE reduce base drive complexity and improve regulation efficiency at high load currents.

Use Scenario: Integrated into lab-grade bench power supplies requiring precise low-noise, ripple-free outputs.

IC Role / Device Role / Timing Role: Primary current-handling transistor in feedback-controlled series regulation loop; dissipates excess input-output differential power.

Use Value: 20 W power rating and 150 °C max junction temperature support sustained operation under worst-case dropout conditions.

Industrial Motor Control

Relay/Contactor Driver Stage

Use Scenario: Driving small DC motors (≤1/4 HP) in factory automation systems using H-bridge or single-ended configurations.

IC Role / Device Role / Timing Role: Low-speed switching element in half-bridge leg; commutates motor current with <10 kHz PWM frequency.

Use Value: Safe operating area (SOA) curves validated to 1 ms pulses support reliable start-up surge current handling without second breakdown.

Use Scenario: Amplifying microcontroller GPIO signals to energize 12–24 VDC industrial relays and contactors.

IC Role / Device Role / Timing Role: High-current interface transistor providing isolation and current gain between logic-level controller and inductive load.

Use Value: Emitter-base voltage rating of 5 Vdc ensures compatibility with standard 3.3 V/5 V logic families; built-in ESD protection (HBM Class 3B) improves system-level robustness.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD2955G	DPAK (Case 369C) package; same die, lower R_JA (71.4 °C/W vs. 75.5 °C/W estimated for IPAK), no straight-lead form.	Preferred for high-density SMT layouts where footprint size matters more than lead geometry; not pin-compatible due to different package outline.	Select MJD2955G if board space is constrained and DPAK mounting is acceptable; verify pad layout against Case 369C dimensions.
MJE2955T	TO-220 package; higher R_JA (~65 °C/W), same V_CEO/I_C/h_FE specs; through-hole, non-Pb-free.	Suitable for prototyping, repair, or legacy through-hole designs; lacks RoHS compliance and surface-mount automation support.	Choose MJE2955T only for hand-soldered or replacement scenarios where IPAK/DPAK rework is impractical.

Compared with MJD2955G and MJE2955T, the MJD2955-1G offers unique straight-lead IPAK packaging for automated assembly, while retaining identical electrical performance - making it optimal for volume production where lead geometry and thermal path optimization are critical.

Availability

MJD2955-1G is available at Aetrix Electronics and suitable for industrial motor drivers, linear power supplies, relay interface modules, and DC-DC converter auxiliary stages requiring stable component supply despite its discontinued status.

Supply support for MJD2955-1G 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, and cloud infrastructure markets.

The MJD2955-1G belongs to onsemi's complementary power transistor family, engineered for cost-effective, thermally robust discrete switching and amplification in industrial power conversion and control systems.

FAQ

Is MJD2955-1G still in active production?

No, the MJD2955-1G is officially marked as discontinued per onsemi's datasheet revision 14 (April 2026). Aetrix Electronics maintains limited legacy stock and supports traceable sourcing for ongoing production runs, but long-term design-in is not recommended without evaluating alternatives like MJD2955G or MJE2955T.

What is the pin configuration of MJD2955-1G?

The MJD2955-1G uses an IPAK (Case 369D) package with four terminals: Pin 1 = Base, Pins 2 & 4 = Collector (internally connected), Pin 3 = Emitter. This dual-collector configuration enhances current capacity and thermal conduction to the PCB copper pour or heatsink.

Can MJD2955-1G be used as a direct replacement for MJE2955?

The MJD2955-1G shares identical electrical specifications with the MJE2955 (V_CEO = 60 V, I_C = 10 A, h_FE = 20–100), but differs in package (IPAK vs. TO-220) and Pb-free compliance. It is not a mechanical drop-in replacement; PCB layout and thermal design must be revised to accommodate the surface-mount IPAK footprint and soldering profile.

What is the maximum safe operating temperature for MJD2955-1G?

The MJD2955-1G has a specified operating junction temperature range of −55 °C to +150 °C. To maintain reliability, the actual junction temperature must stay within this limit - requiring appropriate derating of power dissipation above 25 °C case temperature (0.16 W/°C) and proper heatsinking based on measured R_JA.

Does MJD2955-1G support automotive applications?

The base MJD2955-1G is not AEC-Q101 qualified; however, onsemi offers the NJVMJD2955T4G variant (DPAK) with full automotive qualification, PPAP capability, and unique site controls. For automotive use, that NJV-part must be selected - the MJD2955-1G remains designated for industrial and commercial applications.

MJD2955-1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 10 A

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

Vce Saturation (Max) @ Ib, Ic:: 8V @ 3.3A, 10A

Current - Collector Cutoff (Max):: 50µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 4A, 4V

Power - Max:: 1.75 W

Frequency - Transition:: 2MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK

MJD2955-1G FAQ

1.How can I place an order for MJD2955-1G through Aetrix?

Please submit a Request for Quotation (RFQ) for MJD2955-1G 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 MJD2955-1G reliable?

The price and inventory of MJD2955-1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD2955-1G is usually 5 days.

3.What payment methods are accepted for MJD2955-1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD2955-1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MJD2955-1G?

MJD2955-1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MJD2955-1G 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 MJD2955-1G?

For technical support, including MJD2955-1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD2955-1G requirements.

6.How does Aetrix verify that MJD2955-1G is sourced from the original manufacturer or authorized distributors?

All MJD2955-1G 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 MJD2955-1G meets industry standards.

7.What is the process for return or replacement of MJD2955-1G?

All MJD2955-1G units undergo pre-shipment inspection (PSI). If there is an issue with MJD2955-1G, 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 MJD2955-1G part is unused and in its original packaging.

Return procedure for MJD2955-1G:

1.Submit a request within 90 days.

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

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