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onsemi MJD42CT4
- Part No.:
- MJD42CT4
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD42CT4.pdf
- Description:
- TRANS PNP 100V 6A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:8,604
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Product details
Overview
MJD42CT4 from onsemi is a PNP complementary power transistor in DPAK (TO-252) surface-mount package, rated for 100 VCEO, 6 A continuous collector current, and 20 W power dissipation at TC = 25°C - designed for low-speed switching and linear amplifier applications in automotive and industrial power stages.
For engineers reviewing the MJD42CT4 datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, 6.25°C/W junction-to-case thermal resistance, and compatibility with legacy TIP42-based designs requiring Pb-free, RoHS-compliant discrete transistors.
Technical Context
The MJD42CT4 operates as a medium-power PNP bipolar junction transistor with DC current gain (hFE) ranging from 30 to 75 at IC = 0.3 A and VCE = 4 V, and down to 15–75 at IC = 3 A under same conditions. Its VCE(sat) ≤ 1.5 V at IC = 6 A and IB = 600 mA confirms suitability for saturated switching.
Thermal performance is defined by RJC = 6.25°C/W and RJA = 71.4°C/W (on minimum recommended pad), enabling operation up to +150°C junction temperature. It exhibits fT ≥ 3 MHz and hfe ≥ 20 at 1 kHz, supporting audio-frequency amplification and PWM-driven power control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum safe collector-emitter voltage before breakdown; enables use in 48 V and 72 V DC bus systems with margin. |
| IC (continuous) | 6 A - Sustained collector current capability; supports motor drive stages and relay drivers without forced cooling. |
| PD @ TC = 25°C | 20 W - Power dissipation limit with heatsink contact; requires ≥ 6.25°C/W thermal path to maintain TJ ≤ 150°C. |
| hFE (min) | 30 - Minimum DC current gain at IC = 0.3 A; ensures reliable base drive sizing for linear and switching bias networks. |
| VCE(sat) | ≤1.5 V - Low saturation voltage at full load; reduces conduction loss and heat generation in high-current switches. |
| RJA | 71.4°C/W - Junction-to-ambient thermal resistance on standard PCB pads; defines required board copper area for ambient operation. |
Pinout & Package
Package: DPAK (TO-252-3), case 369C, surface-mount plastic package with exposed drain tab (pin 2 & 4) acting as collector terminal and thermal interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input for bipolar conduction; requires current-limited drive due to β-dependent base current demand. |
| 2 & 4 | Collector | Common high-current output node; electrically and thermally connected to exposed metal tab for heatsinking. |
| 3 | Emiter | Reference terminal for PNP operation; connects to higher potential rail in common-emitter configurations. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
| Pb-free / RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709E; compatible with lead-free reflow soldering profiles. |
| UL 94 V-0 epoxy | Flame-retardant encapsulation material certified at 0.125 in thickness; satisfies safety requirements for industrial enclosures. |
| Complementary to MJD41C | Enables push-pull and H-bridge topologies with matched voltage/current ratings and thermal characteristics. |
| Surface-mount optimized | Lead-formed DPAK footprint minimizes assembly cost and improves mechanical robustness vs. through-hole TO-220 alternatives. |
Applications
| DC Motor Control | Linear Voltage Regulator |
|---|---|
|
Use Scenario: Bidirectional 24–48 V brushed DC motor driver in automotive HVAC actuators and industrial positioning systems. IC Role / Device Role / Timing Role: PNP high-side switch in complementary Darlington or emitter-follower configuration for current sourcing. Use Value: 100 VCEO rating provides headroom against inductive kickback; 6 A continuous current supports >100 W motor loads. |
Use Scenario: Pass transistor in adjustable positive linear regulators delivering up to 5 A for FPGA or microcontroller power rails. IC Role / Device Role / Timing Role: Series pass element operating in active region with external feedback loop controlling base current. Use Value: hFE ≥ 30 ensures stable regulation across load steps; 20 W dissipation allows operation without oversized heatsinks at moderate ΔVIN−OUT. |
| Relay Driver Stage | Power Amplifier Output |
|
Use Scenario: High-current interface between MCU GPIO and 12–24 V electromagnetic relays in PLC I/O modules and building automation panels. IC Role / Device Role / Timing Role: Saturated PNP switch driving relay coil with fast turn-on/off enabled by low VCE(sat) and adequate fT. Use Value: VCE(sat) ≤ 1.5 V limits power loss to <1 W at 6 A, reducing thermal stress during extended duty cycles. |
Use Scenario: Output stage of Class AB audio amplifiers or ultrasonic signal generators operating up to 100 kHz. IC Role / Device Role / Timing Role: Linear amplifying device biased in active region, delivering low-distortion current into reactive loads. Use Value: fT ≥ 3 MHz and hfe ≥ 20 support stable gain and phase margin at audio frequencies with minimal compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP16PF06 | N-channel MOSFET (60 V, 16 A), logic-level gate, RDS(on) = 0.05 Ω - no base current needed but lacks inherent current gain. | Replaces BJT in high-efficiency switching only; unsuitable for linear amplification or analog biasing. | Select when minimizing drive complexity and conduction loss is critical; verify gate drive voltage compatibility. |
| MJD42CRLG | Same die, identical specs, but supplied in 1,800-unit tape-and-reel vs. MJD42CT4G's 2,500-unit reel; no electrical or thermal difference. | No functional difference; choice depends solely on production volume and assembly line feed requirements. | Choose MJD42CT4G for higher-volume automated placement; MJD42CRLG suits smaller-batch or prototyping runs. |
Compared with STP16PF06 and MJD42CRLG, the MJD42CT4 offers proven bipolar linearity and predictable hFE-based drive design, while maintaining AEC-Q101 compliance and DPAK thermal performance - making it optimal for automotive and industrial analog power stages where MOSFET gate drive constraints or linear fidelity matter.
Availability
MJD42CT4 is available at Aetrix Electronics and suitable for automotive HVAC control, industrial relay interfaces, and linear regulator output stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 assurance.
Supply support for MJD42CT4 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 MJD42CT4 belongs to onsemi's complementary power transistor family engineered for rugged, high-reliability linear and switching applications - particularly where automotive qualification, thermal robustness, and legacy TIP-series compatibility are required.
FAQ
What is the maximum junction temperature rating for the MJD42CT4?
The MJD42CT4 has an operating junction temperature range of −65°C to +150°C. This rating allows deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures, provided thermal design maintains TJ within limits using its specified RJC = 6.25°C/W and appropriate heatsinking. The MJD42CT4 must not exceed +150°C at the die to ensure reliability and avoid parametric shift.
Is the MJD42CT4 pin-compatible with the TIP42C?
No - the MJD42CT4 uses a DPAK (TO-252-3) surface-mount package with pins 1=Base, 2&4=Collector, 3=Emitter, whereas the TIP42C is a through-hole TO-220 device with different pinout and mounting. While electrically similar in voltage/current ratings and gain, the MJD42CT4 requires PCB redesign for replacement. The MJD42CT4 is not a drop-in substitute for TIP42C without layout changes.
Does the MJD42CT4 require a heatsink in typical applications?
Yes - the MJD42CT4 dissipates up to 20 W at TC = 25°C, so effective thermal management is essential. With RJA = 71.4°C/W on standard PCB pads, even modest power levels (e.g., 2 W) raise TJ significantly above ambient. For sustained operation above ~500 mW, a heatsink attached to the exposed collector tab (pins 2 & 4) is strongly recommended to keep the MJD42CT4 within its +150°C junction limit.
What does the "NJV" prefix mean in NJVMJD42CT4G*?
The "NJV" prefix in NJVMJD42CT4G* indicates automotive-specific manufacturing controls, including unique site traceability, enhanced process monitoring, and PPAP (Production Part Approval Process) capability. This variant is AEC-Q101 qualified and intended for automotive applications requiring strict change control - distinct from standard MJD42CT4G, though both share identical electrical and thermal specifications.
Can the MJD42CT4 be used in parallel configurations?
Yes - the MJD42CT4 can be paralleled for higher current handling, but requires emitter resistors (typically 0.1–0.5 Ω) to ensure current sharing due to hFE variation and thermal coupling effects. On-resistance mismatch and thermal runaway risk increase without proper balancing; derating total current by ≥20% is advised. The MJD42CT4's consistent gain distribution and thermal resistance support controlled parallel operation when implemented correctly.
MJD42CT4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Cut Tape (CT)
- 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:
- 20 W
- Frequency - Transition:
- 3MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MJD42CT4 FAQ
1.How can I place an order for MJD42CT4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD42CT4 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 MJD42CT4 reliable?
The price and inventory of MJD42CT4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD42CT4 is usually 5 days.
3.What payment methods are accepted for MJD42CT4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD42CT4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD42CT4?
MJD42CT4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD42CT4 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 MJD42CT4?
For technical support, including MJD42CT4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD42CT4 requirements.
6.How does Aetrix verify that MJD42CT4 is sourced from the original manufacturer or authorized distributors?
All MJD42CT4 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 MJD42CT4 meets industry standards.
7.What is the process for return or replacement of MJD42CT4?
All MJD42CT4 units undergo pre-shipment inspection (PSI). If there is an issue with MJD42CT4, 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 MJD42CT4 part is unused and in its original packaging.
Return procedure for MJD42CT4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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