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

Nexperia USA Inc. PBSS302PD-QX

Name: PBSS302PD-QX
Brand: Nexperia USA Inc.
SKU: PBSS302PD-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS302PD-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-74, SOT-457

Datasheet:: PBSS302PD-QX.pdf

Description:: TRANS PNP 40V 4A 6-TSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,885

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Product details

Overview

PBSS302PD-QX from Nexperia is a PNP low V_CEsat Breakthrough In Small Signal (BISS) transistor in SOT457 (SC-74) package, designed for high-efficiency power switching. It delivers −40 V V_CEO, −4 A continuous I_C, 55–75 mΩ R_CEsat at −6 A/−600 mA, and operates up to 150 °C junction temperature-enabling compact, thermally efficient DC-DC converters and MOSFET gate drivers.

For engineers reviewing the PBSS302PD-QX datasheet, PBSS302PD-QX pinout, PBSS302PD-QX application, or PBSS302PD-QX equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with documented functional and thermal trade-offs.

Technical Context

This BISS transistor uses a proprietary epitaxial structure to achieve ultra-low saturation resistance while maintaining robust PNP switching characteristics. Its dual-collector configuration (pins 1,2,5,6) supports high-current routing and thermal spreading on PCBs, and its base-emitter turn-on voltage remains stable across −55 °C to +150 °C ambient range.

The device exhibits fast switching with 12 ns delay time, 43 ns rise time, and 321 ns turn-off time under −10 V V_CC, −2 A I_C, and ±0.1 A base drive-making it suitable for high-frequency PWM control in power management circuits where conduction loss dominates efficiency.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V: Maximum safe collector-emitter blocking voltage in open-base configuration, enabling use in 24 V and 36 V industrial bus systems.
I_C (continuous)	−4 A: Continuous collector current rating at T_amb ≤25 °C on FR4 PCB, supporting sustained load switching without forced cooling.
R_CEsat	55–75 mΩ at −6 A/−600 mA: Ultra-low saturation resistance reduces conduction loss to <180 mW at 4 A, minimizing heatsink requirements.
V_CEsat	−320 to −450 mV at −6 A/−600 mA: Confirmed low-saturation voltage ensures minimal voltage drop across switch, preserving output regulation margin.
f_T	110 MHz: Transition frequency confirms suitability for switching frequencies up to ~10–20 MHz in small-signal gain stages or gate driver buffers.
T_j max	150 °C: Maximum junction temperature allows operation in sealed enclosures or high-ambient environments like automotive engine bays.
h_FE	30–200 (I_C = −0.5 A to −6 A): Wide DC current gain range supports both linear biasing and saturated-switch operation with predictable base drive scaling.

Pinout & Package

SOT457 (SC-74) is a 6-lead surface-mount plastic package with exposed collector terminals for enhanced thermal dissipation. The footprint supports standard reflow and wave soldering per IPC-7351B.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6	Collector	Four parallel collector terminals reduce bond wire inductance and improve current sharing; all connected internally to same node for low-inductance, high-current path to PCB copper pour.
3	Base	Single base terminal accepts standard TTL/CMOS-compatible drive; requires −600 mA for full saturation at −6 A I_C.
4	Emitter	Emitter terminal referenced to system ground or negative rail; polarity defines PNP switching action in high-side or low-side configurations.

Key Features

Feature	Design Value
Ultra-low V_CEsat	−320 mV typical at −6 A enables >98 % efficiency in 12 V load switches with <1 W total loss.
High peak current capability	−15 A single-pulse rating supports motor startup surges and capacitor charging transients without secondary protection.
Thermal resistance (R_th(j-a))	113 K/W on FR4 with 6 cm² collector pad-enables 2.5 W pulsed operation without heatsink in space-constrained designs.
Fast switching performance	321 ns turn-off time allows PWM operation up to 300 kHz with minimal dead-time overhead in synchronous buck controllers.

Applications

Power Management Functions

Charging Circuits

Use Scenario: High-efficiency 12 V to 5 V/3.3 V point-of-load conversion in industrial PLC modules.

IC Role / Device Role / Timing Role: PNP BISS transistor used as synchronous rectifier or active clamp switch in non-isolated buck topology.

Use Value: 55 mΩ R_CEsat cuts conduction loss by 40 % vs. standard PNP transistors, reducing thermal stress on adjacent MCU and ADC components.

Use Scenario: Constant-current Li-ion battery charging stage in portable medical devices.

IC Role / Device Role / Timing Role: Precision current-source switch controlling charge current via feedback-controlled base drive.

Use Value: Stable h_FE of 175 at −2 A ensures accurate current regulation across temperature, eliminating need for external sense resistor trimming.

DC-to-DC Conversion

MOSFET Gate Driving

Use Scenario: 24 V input to 15 V output step-down converter for industrial sensor signal conditioning.

IC Role / Device Role / Timing Role: Low-loss PNP switch in emitter-follower configuration driving high-side N-channel MOSFET gate.

Use Value: −450 mV V_CEsat at −4 A maintains ≥14.5 V gate drive even under full load, ensuring strong MOSFET enhancement and low R_DS(on).

Use Scenario: High-speed gate drive for 40 V logic-level N-channel MOSFETs in motor control H-bridge half-bridges.

IC Role / Device Role / Timing Role: Fast-turn-off PNP pull-down switch discharging MOSFET gate during dead-time intervals.

Use Value: 321 ns turn-off time limits shoot-through risk at 200 kHz PWM, improving reliability over slower bipolar alternatives.

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
PBSS302ND-QX	NPN complement with identical package, V_CEO = 40 V, I_C = 4 A, but higher V_CEsat (−350 mV typ. at 6 A).	Used in low-side switching only; cannot replace PBSS302PD-QX in high-side or complementary pair configurations.	Select when circuit topology requires NPN polarity and lower base drive complexity is prioritized over absolute lowest saturation loss.
DMT3005LPSQ-13	PNP MOSFET (not BJT); R_DS(on) = 45 mΩ @ V_GS = −4.5 V; no base current required but needs negative gate drive.	Requires gate driver IC for level-shifting; superior thermal stability but higher system component count.	Choose for ultra-low static loss in fixed-voltage applications where gate drive infrastructure already exists.

Compared with PBSS302PD-QX, PBSS302ND-QX offers polarity-matched performance with simpler drive but higher conduction loss, while DMT3005LPSQ-13 eliminates base current entirely but introduces gate drive complexity-making PBSS302PD-QX optimal for cost-sensitive, thermally constrained PNP switching where BJT drive simplicity and proven reliability are critical.

Availability

PBSS302PD-QX is available at Aetrix Electronics and suitable for power management functions, charging circuits, DC-to-DC conversion, and MOSFET gate driving requiring stable component supply across industrial, computing, and consumer electronics programs.

Supply support for PBSS302PD-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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

PBSS302PD-QX belongs to Nexperia's BISS transistor product line, engineered specifically for high-current, low-saturation-voltage switching in space- and thermally-constrained power management applications.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum rated base current is −0.8 A continuous, per Table 5. However, for reliable long-term operation at −4 A collector current, the recommended base drive is −400 mA (IC/IB = 10), which keeps junction temperature within 150 °C limit on standard FR4 PCB with 1 cm² collector pad. Exceeding −0.8 A risks metallization failure and accelerated degradation.

Can PBSS302PD-QX be used in linear regulator applications?

No-it is optimized for saturated switching, not linear operation. Its low R_CEsat and high f_T indicate intentional design for fast on/off transitions, and its SOA curve does not support safe linear-mode power dissipation above 360 mW at 25 °C ambient. For linear regulators, use dedicated LDOs or Darlington-based pass transistors with defined safe operating area.

Is the SOT457 package lead-free and RoHS compliant?

Yes. Nexperia confirms PBSS302PD-QX meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound. The SOT457 package complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1), allowing unlimited floor life at ≤30 °C/60 % RH.

How does thermal performance change with different PCB layouts?

R_th(j-a) varies from 350 K/W (standard FR4) to 113 K/W (FR4 with 6 cm² collector pad) to 113 K/W (ceramic Al₂O₃). A 6 cm² copper pour under pins 1,2,5,6 reduces junction-to-ambient thermal resistance by 68 %, enabling 2.5× higher pulsed power handling. Layout must maintain unbroken thermal connection between all four collector pads and the copper plane.

PBSS302PD-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: SC-74, SOT-457

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 4 A

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 450mV @ 600mA, 6A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 1A, 2V

Power - Max:: 360 mW

Frequency - Transition:: 110MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TSOP

PBSS302PD-QX FAQ

1.How can I place an order for PBSS302PD-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS302PD-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 PBSS302PD-QX reliable?

The price and inventory of PBSS302PD-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS302PD-QX is usually 5 days.

3.What payment methods are accepted for PBSS302PD-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS302PD-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS302PD-QX?

PBSS302PD-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS302PD-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 PBSS302PD-QX?

For technical support, including PBSS302PD-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS302PD-QX requirements.

6.How does Aetrix verify that PBSS302PD-QX is sourced from the original manufacturer or authorized distributors?

All PBSS302PD-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 PBSS302PD-QX meets industry standards.

7.What is the process for return or replacement of PBSS302PD-QX?

All PBSS302PD-QX units undergo pre-shipment inspection (PSI). If there is an issue with PBSS302PD-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 PBSS302PD-QX part is unused and in its original packaging.

Return procedure for PBSS302PD-QX:

1.Submit a request within 90 days.

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

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