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onsemi MJD42C1G
- Part No.:
- MJD42C1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
MJD42C1G.pdf
- Description:
- TRANS PNP 100V 6A IPAK
- Quantity:
- Payment:
- Shipping:
Inventory:361
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Product details
Overview
MJD42C1G from onsemi is a PNP complementary power transistor in IPAK (Case 369D) package, rated for 100 VCEO, 6 A continuous collector current, and 20 W total power dissipation at TC = 25°C. It is designed for general-purpose amplifier and low-speed switching applications in industrial power supplies and motor control circuits.
For engineers reviewing the MJD42C1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal characteristics, surface-mount package details, and validated alternative parts for legacy design continuity and obsolescence mitigation.
Technical Context
The MJD42C1G operates as a medium-power PNP bipolar junction transistor with DC current gain (hFE) of 30–75 at IC = 0.3 A and 15–75 at IC = 3 A, VCE = 4 V. Its VCE(sat) is ≤1.5 V at IC = 6 A and IB = 600 mA, supporting reliable saturation in linear and switching modes.
Thermal performance is defined by RJC = 6.25°C/W and RJA = 71.4°C/W (surface-mounted on minimum pad size), with safe operating area limited by thermal and second-breakdown constraints up to 150°C junction temperature. It meets AEC-Q101 requirements when ordered with NJV prefix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 Vdc - Maximum collector-emitter voltage before breakdown under open-base conditions; defines maximum supply rail compatibility. |
| IC (continuous) | 6 Adc - Continuous collector current rating at TC = 25°C; determines usable output stage current capacity. |
| PD (TC = 25°C) | 20 W - Total power dissipation limit at case temperature 25°C; requires heatsinking above ambient derating threshold. |
| hFE (IC = 3 A) | 15–75 - DC current gain range at 3 A collector current; impacts base drive sizing and stability in linear amplifiers. |
| VCE(sat) | ≤1.5 Vdc at IC = 6 A, IB = 600 mA - Saturation voltage defining conduction loss and thermal load in switching applications. |
| RJA | 71.4°C/W - Junction-to-ambient thermal resistance on minimum recommended PCB pad; sets required copper area for thermal management. |
Pinout & Package
Package: IPAK (Case 369D), surface-mount plastic power package with exposed collector tab for thermal conduction. Dimensions: 6.10 mm × 6.54 mm × 2.28 mm, pitch 2.29 mm.
| 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 | Collector | Main high-current output terminal; electrically connected to exposed metal tab for thermal and electrical grounding. |
| 3 | Emiter | Current source terminal; typically tied to positive supply rail in common-emitter configurations. |
| 4 | Collector | Second collector connection - paralleled with Pin 2 to reduce bond wire inductance and improve current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pairing | Electrically matched to MJD41C (NPN) for push-pull amplifier stages without gain mismatch compensation. |
| AEC-Q101 qualification (NJV variant) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22 standards. |
| Pb-free and RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709E; compatible with lead-free reflow profiles (peak 260°C). |
| UL 94 V-0 epoxy | Flame-retardant encapsulation material certified at 0.125 in thickness; supports safety-critical industrial enclosure designs. |
Applications
| Audio Power Amplifier | DC Motor Driver |
|---|---|
|
Use Scenario: Class-B or Class-AB output stage in 10–20 W audio amplifiers for public address systems and instrumentation. IC Role / Device Role / Timing Role: PNP output transistor delivering negative half-cycle current in complementary pair with MJD41C. Use Value: 100 VCEO and 6 A rating support ±30 V rails and transient speaker loads without secondary breakdown. |
Use Scenario: H-bridge low-side switch or single-ended driver for brushed DC motors in HVAC actuators and industrial valves. IC Role / Device Role / Timing Role: Medium-power PNP switch controlling motor current path to ground in discrete driver stages. Use Value: Low VCE(sat) minimizes conduction loss at 2–5 A loads; TO-252-compatible footprint simplifies layout reuse. |
| Linear Voltage Regulator | Power Supply Protection |
|
Use Scenario: Pass transistor in adjustable 3–15 V, 3 A linear regulators for test equipment and analog subsystems. IC Role / Device Role / Timing Role: Series pass element regulating output voltage via base-emitter control loop feedback. Use Value: High hFE range enables stable regulation with minimal base drive current; thermal shutdown margin supported by RJA spec. |
Use Scenario: Overcurrent crowbar or foldback limiter in 24 V industrial power supplies protecting downstream logic and sensors. IC Role / Device Role / Timing Role: Fast-turn-on PNP switch triggered by current-sense comparator to short faulted outputs. Use Value: 10 A peak collector current rating handles surge events; 150°C max junction temperature ensures survival during brief 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 | DPAK (Case 369C) package, same electrical specs, tape-and-reel packaging (2500 pcs), active production status. | Preferred for new SMT assembly lines requiring automated pick-and-place compatibility and volume procurement. | Select MJD42CT4G for new designs needing long-term availability and standard DPAK footprint. |
| TIP42C | TO-220 through-hole package, identical VCEO/IC/PD ratings, but higher RJA (~62°C/W with heatsink) and no AEC-Q101 option. | Suitable for prototyping, repair, or low-volume through-hole boards where thermal mass compensates for lower efficiency. | Choose TIP42C only when board-level redesign is impractical and manual assembly is acceptable. |
Compared with MJD42C1G, MJD42CT4G offers identical performance in a more widely supported surface-mount package with active lifecycle status, while TIP42C provides mechanical and thermal trade-offs in legacy through-hole form - both serve as functional alternatives but require layout or process adaptation.
Availability
MJD42C1G is available at Aetrix Electronics and suitable for industrial power supplies, motor control modules, and audio amplifier designs requiring stable component supply despite its discontinued status for new designs.
Supply support for MJD42C1G 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 MJD42C1G belongs to onsemi's complementary power transistor family designed for cost-sensitive, medium-power linear and switching applications where ruggedness, thermal reliability, and Pb-free compliance are essential.
FAQ
Is MJD42C1G still in production?
No, MJD42C1G is discontinued per onsemi's official documentation (Note 5, Page 5). It is not recommended for new designs. However, Aetrix Electronics maintains limited legacy stock and supports continuity sourcing for existing production programs requiring exact form-fit-function replacement.
What is the package type and pin configuration of MJD42C1G?
MJD42C1G uses the IPAK package (Case 369D) with four terminals: Pin 1 = Base, Pins 2 & 4 = Collector (internally paralleled), Pin 3 = Emitter. The exposed collector tab serves as both thermal path and electrical connection, requiring proper PCB copper pour and isolation.
How does MJD42C1G compare to MJD42CT4G?
MJD42C1G and MJD42CT4G share identical electrical specifications and thermal limits, but differ in package (IPAK vs. DPAK) and packaging format (rail vs. tape-and-reel). MJD42CT4G is actively produced and recommended for new designs due to broader distributor support and automated assembly compatibility.
Can MJD42C1G be used in automotive applications?
Only the NJV-prefixed variants (e.g., NJVMJD42CT4G) are AEC-Q101 qualified and PPAP capable. The standard MJD42C1G lacks automotive qualification documentation and should not be deployed in safety-critical or temperature-cycled automotive environments without additional validation.
What is the maximum safe operating area (SOA) limit for MJD42C1G?
The SOA curve (Figure 12) defines MJD42C1G's IC–VCE limits under pulsed conditions: at 100 V, maximum single-pulse current is ~0.3 A (1 ms); at 10 V, it rises to ~5 A. Operation must remain within thermal and second-breakdown boundaries - exceeding these risks irreversible failure even if average power appears acceptable.
MJD42C1G 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):
- 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:
- Through Hole
- Supplier Device Package:
- IPAK
MJD42C1G FAQ
1.How can I place an order for MJD42C1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD42C1G 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 MJD42C1G reliable?
The price and inventory of MJD42C1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD42C1G is usually 5 days.
3.What payment methods are accepted for MJD42C1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD42C1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD42C1G?
MJD42C1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD42C1G 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 MJD42C1G?
For technical support, including MJD42C1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD42C1G requirements.
6.How does Aetrix verify that MJD42C1G is sourced from the original manufacturer or authorized distributors?
All MJD42C1G 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 MJD42C1G meets industry standards.
7.What is the process for return or replacement of MJD42C1G?
All MJD42C1G units undergo pre-shipment inspection (PSI). If there is an issue with MJD42C1G, 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 MJD42C1G part is unused and in its original packaging.
Return procedure for MJD42C1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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