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Nexperia USA Inc. PBSS4021PZ-QX
- Part No.:
- PBSS4021PZ-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
PBSS4021PZ-QX.pdf
- Description:
- TRANS PNP 20V 6.6A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
PBSS4021PZ-QX from Nexperia is a PNP low VCEsat transistor in SOT223 (SC-73) package, rated for −20 V VCEO, −6.6 A continuous collector current, and 22 mΩ typical RCEsat. It delivers high hFE (100–210) at IC = −7 A and is qualified to AEC-Q101 for automotive loadswitch and power management circuits.
For engineers reviewing the PBSS4021PZ-QX datasheet, PBSS4021PZ-QX pinout, PBSS4021PZ-QX application, or PBSS4021PZ-QX equivalent, this device is selected for high-efficiency, space-constrained DC switching where low conduction loss and thermal robustness on FR4 PCBs are critical.
Technical Context
This PNP bipolar junction transistor operates as a medium-power, surface-mount load switch with optimized saturation characteristics. Its dual-collector pin configuration (Pins 2 and 4) enables enhanced thermal dissipation via extended copper pad routing, supporting up to 2.6 W on ceramic PCBs.
The device achieves VCEsat as low as −140 mV at IC = −7 A / IB = −350 mA and maintains stable hFE across −55 °C to +150 °C ambient, with transient thermal impedance down to 11 K/W (junction-to-solder point).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −20 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in automotive 12 V systems. |
| IC | −6.6 A - Continuous DC collector current rating; supports high-current battery-fed loads like fans or solenoids. |
| RCEsat | 22 mΩ typ - Low saturation resistance reduces I²R losses and PCB heating under full load. |
| hFE | 100–210 - High DC current gain at IC = −7 A enables efficient drive with modest base current (e.g., −350 mA). |
| Tj max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Meets stress test requirements for discrete semiconductors in automotive applications. |
Pinout & Package
SOT223 (SC-73) plastic surface-mount package with 4 leads, 2.3 mm pitch, and integrated heatsink pad (Pin 2 and Pin 4 both connected to collector). Dimensions: 6.5 mm × 3.5 mm × 1.65 mm body; designed for reflow or wave soldering per IPC-7095.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input; requires −100 mA to −600 mA base drive for full saturation across operating range. |
| 2 | Collector (C) | Main high-current output terminal; electrically tied to Pin 4 for parallel current handling and thermal spreading. |
| 3 | Emiter (E) | Common emitter node; connects to system ground or negative rail in high-side switching configurations. |
| 4 | Collector (C) | Second collector terminal; used with Pin 2 to increase copper area for heat transfer and reduce thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCEsat | −140 mV typ at IC = −7 A / IB = −350 mA - Reduces power loss by >40% vs. standard PNP transistors at same current. |
| Dual-collector thermal path | Pins 2 & 4 both collector - Enables 2× PCB copper area for heatsinking; lowers Rth(j-a) to 50 K/W on ceramic substrate. |
| High hFE at high IC | 210 typ at IC = −7 A - Minimizes required base drive current and simplifies driver stage design. |
| AEC-Q101 qualification | Stress-tested for automotive reliability - Validated for 15-year service life in engine control, body electronics, and ADAS modules. |
Applications
| Automotive Load Switch | Battery-Powered Motor Control |
|---|---|
|
Use Scenario: High-side switching of 12 V cabin fans or HVAC actuators in vehicles. IC Role / Device Role / Timing Role: PNP transistor acting as main power switch; driven by microcontroller GPIO through base resistor network. Use Value: Low RCEsat limits temperature rise to <45 °C rise at 5 A, eliminating need for external heatsink in compact modules. |
Use Scenario: Power enable circuit for portable medical pumps powered by Li-ion batteries. IC Role / Device Role / Timing Role: PNP switch controlling battery discharge path to motor driver IC; handles inrush and steady-state load. Use Value: −6.6 A rating and −20 V VCEO support 2S/3S battery stacks with headroom for load dump transients. |
| USB-C Power Delivery Gate | Industrial 24 V DC Power Sequencing |
|
Use Scenario: Reverse-polarity protection and load disconnect in USB-C PD sink adapters. IC Role / Device Role / Timing Role: PNP configured as high-side ideal diode replacement; blocks reverse current while minimizing forward drop. Use Value: VCEsat ≤ −240 mV ensures <0.3% efficiency loss at 3 A, meeting USB PD 3.1 EPR thermal budgets. |
Use Scenario: Controlled power-up sequencing of PLC I/O modules using 24 V industrial rail. IC Role / Device Role / Timing Role: PNP switch enabling downstream DC-DC converters only after upstream regulators stabilize. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operation ensure reliability in uncontrolled factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP low-VCEsat transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201PZT1G | −20 V VCEO, −4.5 A IC, 45 mΩ RCEsat; SOT223 package, AEC-Q101 qualified. | Lower current and higher RCEsat limit use to sub-4 A loads; less suitable for fan/motor drivers above 30 W. | Select when cost sensitivity outweighs thermal performance; verify base drive capability for hFE = 100–180 range. |
| Diodes Incorporated DXT7051Q-13 | −20 V VCEO, −5 A IC, 35 mΩ RCEsat; SOT223, AEC-Q101 qualified, but no dual-collector pinout. | Lacks Pin 4 collector connection, reducing thermal margin on FR4; derate to 4.2 A continuous for same PCB layout. | Prefer for legacy designs using single-collector layouts; avoid in new thermal-critical automotive modules. |
Compared with PBSS4021PZ-QX, NSS40201PZT1G offers lower cost but sacrifices 32% current capacity and doubles conduction loss; DXT7051Q-13 provides intermediate performance but lacks the dual-collector thermal advantage critical for sustained 5–6 A operation.
Availability
PBSS4021PZ-QX is available at Aetrix Electronics and suitable for automotive loadswitching, battery-powered motor control, and industrial 24 V power sequencing requiring stable component supply across multi-year production cycles.
Supply support for PBSS4021PZ-QX 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
Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
PBSS4021PZ-QX belongs to Nexperia's Automotive Qualified PNP Low VCEsat Transistor product line, engineered specifically for energy-efficient, space-constrained DC switching in harsh-environment applications.
FAQ
What is the maximum allowable base current for PBSS4021PZ-QX?
The absolute maximum base current is −1 A, per Table 5 (Limiting Values). However, typical saturation drive uses −350 mA at IC = −7 A (IC/IB = 20), and −600 mA at IC = −6 A (IC/IB = 10). Exceeding −1 A risks permanent bond-wire damage even in pulsed conditions.
Can PBSS4021PZ-QX be used in high-frequency switching applications?
No - it is not optimized for high-speed switching. Turn-off time is 460 ns and fT is 74 MHz, but its primary design intent is DC/low-frequency load switching (≤10 kHz). For PWM above 20 kHz, MOSFET alternatives with lower gate charge are recommended.
How does the dual-collector pinout improve thermal performance?
Pins 2 and 4 are internally shorted to the collector and externally routed to separate large copper pads. This doubles effective heatsink area, lowering Rth(j-a) from 160 K/W (standard footprint) to 50 K/W (ceramic PCB) and enabling 2.6 W dissipation without forced air cooling.
Is PBSS4021PZ-QX pin-compatible with its NPN complement PBSS4021NZ-Q?
Yes - both share identical SOT223 (SC-73) pinout: Pin 1 = Base, Pins 2 & 4 = Collector (NPN) or Collector (PNP), Pin 3 = Emitter. Polarity reversal is the only change; layout reuse is fully supported for complementary switching stages.
PBSS4021PZ-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 6.6 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 240mV @ 350mA, 7A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 250 @ 1A, 2V
- Power - Max:
- 770 mW
- Frequency - Transition:
- 85MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
PBSS4021PZ-QX FAQ
1.How can I place an order for PBSS4021PZ-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PBSS4021PZ-QX 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 PBSS4021PZ-QX reliable?
The price and inventory of PBSS4021PZ-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4021PZ-QX is usually 5 days.
3.What payment methods are accepted for PBSS4021PZ-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4021PZ-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBSS4021PZ-QX?
PBSS4021PZ-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBSS4021PZ-QX 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 PBSS4021PZ-QX?
For technical support, including PBSS4021PZ-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4021PZ-QX requirements.
6.How does Aetrix verify that PBSS4021PZ-QX is sourced from the original manufacturer or authorized distributors?
All PBSS4021PZ-QX 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 PBSS4021PZ-QX meets industry standards.
7.What is the process for return or replacement of PBSS4021PZ-QX?
All PBSS4021PZ-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4021PZ-QX, 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 PBSS4021PZ-QX part is unused and in its original packaging.
Return procedure for PBSS4021PZ-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PBSS4021PZ-QX Tags
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