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

Nexperia USA Inc. PBSS4021PZ,115

Name: PBSS4021PZ,115
Brand: Nexperia USA Inc.
SKU: PBSS4021PZ,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4021PZ,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: PBSS4021PZ,115.pdf

Description:: TRANS PNP 20V 6.6A SOT-223

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS4021PZ from Nexperia is a PNP low V_CEsat transistor in SOT223 (SC-73) package, rated for −20 V V_CEO, −6.6 A continuous collector current, and 22 mΩ typical R_CEsat at −6 A/−600 mA drive. It serves as a high-efficiency load switch in battery-powered power management circuits, delivering minimal conduction loss and reduced thermal footprint.

For engineers reviewing the PBSS4021PZ datasheet, PBSS4021PZ pinout, PBSS4021PZ application, or PBSS4021PZ equivalent, key selection criteria include its AEC-Q101 qualification, ultra-low saturation resistance, thermal performance on FR4 and ceramic PCBs, and compatibility with motor/fan switching and charging circuit topologies.

Technical Context

This PNP transistor operates with V_CEO = −20 V and supports pulsed I_C up to −20 A. Its DC current gain (h_FE) reaches 210 at −500 mA and remains ≥100 at −7 A, enabling robust base drive efficiency. The device uses epitaxial planar die construction optimized for low saturation voltage and fast switching (t_on = 140 ns, t_off = 460 ns).

Thermal design is supported by multiple R_th(j-a) values: 160 K/W (standard FR4), 50 K/W (ceramic PCB), and 11 K/W R_th(j-sp). Saturation behavior is characterized across temperature (−55 °C to 150 °C) and drive ratios (IC/IB = 10–100), confirming stable operation in automotive ambient conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−20 V - Maximum safe collector-emitter blocking voltage with open base; defines system rail compatibility up to 20 V PNP-side switching.
I_C	−6.6 A - Continuous DC collector current rating; enables direct control of medium-power loads like fans or LED banks without external heatsinking on 4-layer PCB.
R_CEsat	22 mΩ (typ) - Low saturation resistance at −6 A/−600 mA; reduces conduction loss to <100 mW, minimizing self-heating in compact layouts.
h_FE	100–210 - High DC current gain across operating range; allows simplified base drive with ≤10% base current ratio, reducing MCU GPIO loading.
t_off	460 ns - Fast turn-off time under −12.5 V V_CC, −1 A I_C, ±50 mA base drive; supports PWM frequencies >200 kHz in synchronous buck or charge-pump control.
AEC-Q101	Qualified - Meets stress test requirements for automotive discrete semiconductors; validated for temperature cycling, HTRB, and ESD per AEC standard.
T_j max	150 °C - Maximum junction temperature; enables operation in under-hood environments when derated per PCB thermal configuration.

Pinout & Package

SOT223 (SC-73) plastic surface-mount package with 4 leads, 2.3 mm pitch, and integrated heatsink pad (lead 2 and 4 both connected to collector). Body dimensions: 6.5 mm × 3.5 mm × 1.65 mm. Designed for reflow and wave soldering with defined land patterns per Figures 20–21.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input node; requires −100 mA to −1 A drive depending on load current; polarity-sensitive for PNP activation.
2	Collector (C)	Main high-current output terminal; electrically tied to lead 4; used for PCB thermal pad connection to improve heat dissipation.
3	Emiter (E)	Common reference node; connects to positive supply rail in high-side switch configurations; carries full load current.
4	Collector (C)	Duplicate collector terminal; internally bonded to pin 2; must be soldered to copper pour for thermal performance and current sharing.

Key Features

Feature	Design Value
Low V_CEsat	140 mV (max) at −7 A/−350 mA drive - Enables <0.5 W conduction loss in 12 V systems, reducing need for forced air cooling.
High I_C capability	−6.6 A continuous, −20 A pulsed - Supports direct driving of motors, solenoids, and multi-cell battery chargers without paralleling devices.
High h_FE at high I_C	≥100 at −7 A - Maintains efficient base drive even near current limit, lowering required base resistor power and MCU output current.
Thermal robustness	R_th(j-sp) = 11 K/W - Enables rapid heat transfer to PCB copper, supporting sustained operation at >1.5 W dissipation on 4-layer boards.
AEC-Q101 qualification	Validated for automotive use - Confirmed reliability under temperature cycling, high-temp reverse bias, and mechanical shock per AEC standard.

Applications

Load Switching

Battery Charging Control

Use Scenario: High-side power switch for USB-C PD sink or portable medical device battery isolation.

IC Role / Device Role / Timing Role: PNP transistor configured as active-high load switch controlling 5–20 V rail delivery to subsystems.

Use Value: 22 mΩ R_CEsat limits voltage drop to <140 mV at 6 A, preserving battery runtime and enabling precise enable/disable sequencing.

Use Scenario: Constant-current regulation stage in linear Li-ion charger for wearables.

IC Role / Device Role / Timing Role: Pass element in adjustable linear regulator topology, modulated via base current feedback loop.

Use Value: Stable h_FE across −1 A to −4 A ensures predictable current mirror accuracy and <±2% charge current tolerance.

Automotive Power Management

Fan/Motor Drive

Use Scenario: Engine control unit (ECU) auxiliary power rail switch for sensors and actuators.

IC Role / Device Role / Timing Role: AEC-Q101-qualified PNP switch enabling ISO 16750-compliant cold-crank and load-dump protection.

Use Value: 150 °C T_j rating and −20 V V_CEO support operation across −40 °C to +125 °C ambient with no derating below 5 A.

Use Scenario: 12 V DC brushless fan driver in industrial HVAC or telecom chassis.

IC Role / Device Role / Timing Role: Medium-power switching element in PWM-controlled high-side driver stage.

Use Value: 460 ns t_off and 140 ns t_on allow clean 25 kHz PWM operation with <5% dead-time overhead, minimizing acoustic noise.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP low-V_CEsat transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS40201MR6T1G	V_CEO = −20 V, I_C = −4.5 A, R_CEsat = 45 mΩ (typ) - Lower current rating and higher saturation resistance.	Not qualified to AEC-Q101; suitable for commercial-grade consumer power switches only.	Select when cost sensitivity outweighs automotive compliance and 2 A+ current margin.
Diodes Incorporated DXT6011P5-13	V_CEO = −20 V, I_C = −5 A, R_CEsat = 30 mΩ (typ), SOT89 package - Smaller thermal mass, no dual-collector heatsink pad.	Limited PCB thermal interface; unsuitable for sustained >3 A operation without external heatsink.	Choose for space-constrained designs where 5 A peak and single-sided thermal path suffice.

Compared with NSS40201MR6T1G and DXT6011P5-13, PBSS4021PZ delivers 47% lower R_CEsat and 32% higher I_C while providing AEC-Q101 validation and dual-collector thermal routing-making it optimal for automotive and industrial 6 A+ load switching where efficiency and reliability are co-prioritized.

Availability

PBSS4021PZ is available at Aetrix Electronics and suitable for automotive power management, battery charging circuits, and industrial motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PBSS4021PZ 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 mobile markets.

PBSS4021PZ belongs to Nexperia's low V_CEsat transistor product line, engineered specifically for high-current, high-efficiency switching in space- and thermally-constrained applications where minimizing conduction loss is critical.

FAQ

What is the maximum allowable base current for PBSS4021PZ?

The absolute maximum base current is −1 A, per Table 5 (Limiting Values). However, typical drive conditions use −100 mA to −600 mA to achieve target collector currents (−1 A to −6 A) while maintaining h_FE > 100 and avoiding excessive base power dissipation. Exceeding −1 A risks permanent degradation of the base-emitter junction.

Can PBSS4021PZ be used in a high-side switch configuration with 24 V supply?

No-PBSS4021PZ has a V_CEO rating of −20 V, meaning it is only rated to block up to 20 V between collector and emitter. Applying 24 V exceeds the absolute maximum rating and risks avalanche breakdown or catastrophic failure. For 24 V systems, a −30 V or −40 V PNP device such as PBSS4041PZ is required.

How does the dual-collector pin (pins 2 and 4) affect PCB layout?

Pins 2 and 4 are internally connected to the same collector node and must both be soldered to a shared copper pour or thermal pad. This configuration reduces effective thermal resistance by ~30% compared to single-pin attachment and improves current sharing. The footprint in Figure 20 specifies a 6.15 mm × 3.85 mm solder land spanning both pins for optimal thermal and electrical performance.

Is PBSS4021PZ pin-compatible with its NPN complement PBSS4021NZ?

Yes-both share identical SOT223 (SC-73) package outline and pin assignment (pin 1 = base, pins 2/4 = collector/emitter respectively). However, their internal polarity differs: PBSS4021PZ is PNP (emitter = high-side), PBSS4021NZ is NPN (emitter = low-side). Circuit topology must be redesigned accordingly; they are functional complements, not drop-in replacements.

PBSS4021PZ,115 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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 150 @ 4A, 2V

Power - Max:: 2.6 W

Frequency - Transition:: 85MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

PBSS4021PZ,115 FAQ

1.How can I place an order for PBSS4021PZ,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4021PZ,115 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,115 reliable?

The price and inventory of PBSS4021PZ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4021PZ,115 is usually 5 days.

3.What payment methods are accepted for PBSS4021PZ,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4021PZ,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4021PZ,115?

PBSS4021PZ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4021PZ,115 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,115?

For technical support, including PBSS4021PZ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4021PZ,115 requirements.

6.How does Aetrix verify that PBSS4021PZ,115 is sourced from the original manufacturer or authorized distributors?

All PBSS4021PZ,115 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,115 meets industry standards.

7.What is the process for return or replacement of PBSS4021PZ,115?

All PBSS4021PZ,115 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4021PZ,115, 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,115 part is unused and in its original packaging.

Return procedure for PBSS4021PZ,115:

1.Submit a request within 90 days.

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

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