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onsemi MJD32RLG
- Part No.:
- MJD32RLG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD32RLG.pdf
- Description:
- TRANS PNP 40V 3A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
MJD32RLG from onsemi is a PNP complementary power transistor in DPAK (TO-252) surface-mount package, rated for 40 VCEO, 3 A continuous collector current, and 15 W total power dissipation at TC = 25 °C. It delivers hFE ≥ 10 at IC = 3 A, VCE = 4 V, and VCE(sat) ≤ 1.2 V under IC = 3 A / IB = 375 mA, enabling use in low-speed switching and linear amplifier stages of industrial power supplies and motor drivers.
For engineers reviewing the MJD32RLG datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, complementary NPN pairing with MJD31RLG, and validated alternatives for high-reliability discrete power stage design.
Technical Context
This PNP bipolar junction transistor operates in active and saturation regions with DC current gain (hFE) specified from 10 to 50 across IC = 1–3 A and VCE = 2–4 V. Its fT = 3 MHz supports audio-frequency amplification and <100 kHz switching applications.
Thermal performance is defined by RθJC = 8.3 °C/W and RθJA = 80 °C/W on FR-4 board (165 mm², 1 oz Cu), requiring heatsinking above ~1.5 W ambient dissipation. The device meets AEC-Q101 stress testing when ordered with NJV prefix, though MJD32RLG itself is standard industrial grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum safe collector-emitter voltage before breakdown in open-base condition |
| IC (continuous) | 3.0 A - Sustained collector current limit without thermal runaway on minimum recommended PCB copper |
| PD @ TC = 25 °C | 15 W - Maximum power dissipation achievable only with direct case-to-heatsink thermal path |
| hFE @ IC = 3 A | 10–50 - Current gain range defining base drive requirements for saturation in switching designs |
| VCE(sat) @ IC/IB = 10 | ≤1.2 V - Low saturation voltage enabling <3.6 W conduction loss at 3 A, critical for efficiency in linear regulators |
| fT | 3 MHz - Upper frequency limit for small-signal amplification; suitable for audio preamps but not RF |
| RθJC | 8.3 °C/W - Junction-to-case thermal resistance confirming need for mechanical heatsink contact in >5 W operation |
Pinout & Package
DPAK (TO-252) surface-mount package with exposed drain pad (pin 2 and 4 tied internally to collector), 6.10 × 6.54 × 2.28 mm footprint, Pb-free (RoHS compliant), UL 94 V−0 rated epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires ≥375 mA base drive to saturate at 3 A collector current |
| 2 | Collector | Main current output node; electrically connected to pin 4 and thermal pad for heatsinking |
| 3 | Emiter | Current return path; tied to system ground or negative rail in common-emitter configurations |
| 4 | Collector | Second collector connection point; must be soldered to thermal pad for rated power handling |
Key Features
| Feature | Design Value |
|---|---|
| Complementary pair with MJD31RLG | Enables push-pull and H-bridge topologies without cross-manufacturer parameter mismatch |
| Lead-formed for surface mount | Eliminates through-hole rework; compatible with standard SMT pick-and-place and reflow profiles |
| Electrically similar to TIP32 | Allows drop-in replacement in legacy designs originally using TO-220 TIP32 series, preserving layout |
| Pb-free and RoHS compliant | Meets global environmental regulations without compromising thermal or electrical performance |
| UL 94 V−0 epoxy | Self-extinguishing encapsulation required for industrial equipment safety certifications |
Applications
| Industrial Power Supply | DC Motor Driver Stage |
|---|---|
Use Scenario: Linear pass transistor in adjustable 0–30 V, 3 A bench power supply. IC Role / Device Role / Timing Role: PNP emitter-follower configured as voltage-controlled current source regulating output voltage. Use Value: VCE(sat) ≤ 1.2 V minimizes dropout and heat generation at full load, while hFE ≥ 10 ensures stable base drive from op-amp error amplifier. |
Use Scenario: Low-side switch in 24 V brushed DC motor control with PWM up to 20 kHz. IC Role / Device Role / Timing Role: PNP switch in common-emitter configuration driving motor winding via flyback diode. Use Value: 3 A IC rating supports peak motor stall currents; fT = 3 MHz enables clean turn-off with minimal tail current in PWM transitions. |
| Audio Amplifier Output Stage | Relay/LED Driver Interface |
Use Scenario: Complementary Class AB output stage in 10 W mono audio amplifier. IC Role / Device Role / Timing Role: PNP half of push-pull pair delivering negative half-cycle current to 8 Ω speaker load. Use Value: Matched hFE and VCE(sat) with MJD31RLG reduces crossover distortion; thermal stability up to +150 °C prevents thermal runaway during sustained output. |
Use Scenario: High-current interface between microcontroller GPIO and 12 V automotive relay coil (150 mA). IC Role / Device Role / Timing Role: PNP switch sinking relay coil current to ground when GPIO pulls base low. Use Value: 5 A ICM peak rating absorbs relay inrush; VEB = 5 V rating tolerates GPIO leakage or noise without unintended turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD32CT4G | Same die, identical specs, but supplied in 2,500-unit tape-and-reel vs. 1,800-unit reel for MJD32RLG | No functional difference; suited for higher-volume automated assembly where reel size affects feeder compatibility | Select MJD32CT4G for production runs >50k units to reduce changeover frequency on SMT lines. |
| TIP32C | TO-220 through-hole package; same VCEO = 100 V, IC = 3 A, but higher RθJA = 125 °C/W and no surface-mount thermal pad | Requires PCB hole drilling and wave soldering; unsuitable for compact SMT-only boards | Choose TIP32C only for prototyping or legacy through-hole systems where DPAK footprint is unavailable. |
Compared with MJD32RLG, MJD32CT4G offers identical electrical and thermal performance in a larger reel format for high-throughput manufacturing, while TIP32C trades surface-mount convenience and lower thermal resistance for through-hole compatibility and higher voltage rating-neither is pin-compatible due to differing packages.
Availability
MJD32RLG is available at Aetrix Electronics and suitable for industrial power supplies, DC motor drivers, and audio amplifier output stages requiring stable component supply and long-term obsolescence management.
Supply support for MJD32RLG 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.
MJD32RLG belongs to the complementary power transistor family designed for cost-sensitive, high-reliability linear and switching applications in industrial controls and power conversion systems.
FAQ
What is the maximum continuous collector current rating for MJD32RLG?
The MJD32RLG is rated for 3.0 A continuous collector current (IC) at case temperature TC = 25 °C. This rating assumes proper heatsinking per the datasheet's minimum pad layout (FR-4, 165 mm², 1 oz Cu). Derating is required above 25 °C at 0.12 W/°C, reducing usable current significantly without thermal management.
Is MJD32RLG pin-compatible with the TIP32 series?
MJD32RLG is electrically similar to the TIP32 series but not pin-compatible due to its DPAK (TO-252) surface-mount package versus TIP32's TO-220 through-hole outline. Pin 1 (base), pin 2 (collector), and pin 3 (emitter) functions align, but physical dimensions, mounting method, and thermal pad (pins 2 & 4 tied) differ fundamentally-PCB redesign is required for substitution.
Does MJD32RLG support automotive-grade qualification?
The base MJD32RLG is not AEC-Q101 qualified. However, onsemi offers the NJVMJD32RLG variant with NJV prefix, which is AEC-Q101 qualified and PPAP capable for automotive applications. Standard MJD32RLG is intended for industrial and commercial use only.
What is the typical DC current gain (hFE) of MJD32RLG at 3 A collector current?
At IC = 3 A and VCE = 4 V, the MJD32RLG exhibits hFE ranging from 10 (minimum) to 50 (maximum). This wide spread means circuit designs must accommodate gain variation-base drive should be sized for the minimum hFE to ensure saturation under worst-case conditions.
Can MJD32RLG be used in parallel with other transistors for higher current handling?
Parallel operation of MJD32RLG devices is not recommended without individual emitter resistors due to hFE and VBE parameter variation across units. The datasheet does not specify matching tolerances, and thermal coupling differences can cause current imbalance leading to thermal runaway. For >3 A, select a single higher-rated device instead.
MJD32RLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.2V @ 375mA, 3A
- Current - Collector Cutoff (Max):
- 50µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 10 @ 3A, 4V
- Power - Max:
- 1.56 W
- Frequency - Transition:
- 3MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MJD32RLG FAQ
1.How can I place an order for MJD32RLG through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD32RLG 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 MJD32RLG reliable?
The price and inventory of MJD32RLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD32RLG is usually 5 days.
3.What payment methods are accepted for MJD32RLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD32RLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD32RLG?
MJD32RLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD32RLG 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 MJD32RLG?
For technical support, including MJD32RLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD32RLG requirements.
6.How does Aetrix verify that MJD32RLG is sourced from the original manufacturer or authorized distributors?
All MJD32RLG 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 MJD32RLG meets industry standards.
7.What is the process for return or replacement of MJD32RLG?
All MJD32RLG units undergo pre-shipment inspection (PSI). If there is an issue with MJD32RLG, 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 MJD32RLG part is unused and in its original packaging.
Return procedure for MJD32RLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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