Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. PBSS5240T-QR

Name: PBSS5240T-QR
Brand: Nexperia USA Inc.
SKU: PBSS5240T-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PBSS5240T-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PBSS5240T-QR.pdf

Description:: TRANS PNP 40V 2A TO-236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,201

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PBSS5240T-QR from Nexperia is a PNP low V_CE(sat) transistor in SOT23 package, rated for −40 V V_CEO, −2 A I_C, and 140–220 mΩ R_CE(sat) at −500 mA/−50 mA drive; used as high-efficiency switch in automotive battery management and DC/DC converter power paths.

For engineers reviewing the PBSS5240T-QR datasheet, PBSS5240T-QR pinout, PBSS5240T-QR application, or PBSS5240T-QR equivalent, key selection criteria include verified AEC-Q101 qualification, low saturation resistance under automotive ambient conditions, thermal resistance (260 K/W with collector pad), and confirmed PNP complement pairing with PBSS4240T-Q.

Technical Context

This discrete PNP transistor operates as a saturated-switching device with guaranteed V_CE(sat) ≤ 350 mV at −2 A/−200 mA drive and h_FE = 100–180 at −2 A. Its design targets high-current, low-loss switching where reduced heat generation improves system reliability.

Qualified per AEC-Q101, it supports operation from −65 °C to +150 °C junction temperature and delivers stable performance across automotive ambient ranges, with V_(BR)CEO = −40 V and V_(BR)EBO = −5 V ensuring robust voltage margin in supply-line applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - Maximum safe collector-emitter blocking voltage with base open; defines supply rail compatibility up to 40 V systems.
I_C	−2 A - Continuous DC collector current rating; supports motor/lamp drivers and battery discharge paths without derating at 25 °C.
R_CE(sat)	140–220 mΩ - Measured at −500 mA/−50 mA; enables <110 mW conduction loss at 500 mA, reducing thermal load on PCB.
h_FE	100–180 - DC current gain at −2 A/−2 V; ensures reliable saturation with modest base drive (e.g., −200 mA IB for −2 A IC).
T_j max	+150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with appropriate board thermal design.
R_th(j-a)	260 K/W - With 1 cm² collector copper pad; enables 480 mW power dissipation at 25 °C ambient, supporting sustained switching duty.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body; tin-plated single-sided FR4 PCB mount with standard footprint.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input requiring −50 mA typical drive to saturate at −500 mA collector current; polarity-sensitive for PNP turn-on.
2	Emitter (E)	Common reference terminal tied to higher-potential rail (e.g., battery +); carries full load current and defines V_BE bias path.
3	Collector (C)	Switched output node connected to load ground or return path; thermally coupled to PCB copper for 260 K/W R_th(j-a).

Key Features

Feature	Design Value
Low V_CE(sat)	≤350 mV at −2 A/−200 mA - Reduces conduction loss by >40% vs. standard PNP transistors, critical for thermal-limited battery-powered designs.
AEC-Q101 qualification	Stress-tested per automotive discrete semiconductor standard - Confirms suitability for under-hood ECUs, body control modules, and ADAS power stages.
High current capability	−2 A continuous / −3 A pulsed - Supports direct driving of lamps, small motors, and solenoids without external driver stages.
Thermal reliability	150 °C T_j max with 260 K/W R_th(j-a) - Enables stable operation in compact enclosures using minimal copper area.

Applications

Supply Line Switching

Battery Management

Use Scenario: High-side power switch controlling 12 V/24 V vehicle subsystems (e.g., HVAC fan, lighting circuits) with reverse-polarity protection.

IC Role / Device Role / Timing Role: PNP transistor configured as emitter-follower high-side switch, enabling load disconnect during fault or sleep mode.

Use Value: Low R_CE(sat) limits voltage drop to <0.44 V at 2 A, preserving >96% supply efficiency and minimizing self-heating in confined fuse boxes.

Use Scenario: Cell-balancing or charge-path isolation in 12 V lead-acid or LiFePO₄ battery packs for commercial vehicles.

IC Role / Device Role / Timing Role: Discrete PNP switch isolating charging/discharging paths between battery banks or protecting against overcurrent faults.

Use Value: −40 V V_CEO withstands load-dump transients; AEC-Q101 qualification ensures long-term reliability across 10+ year vehicle lifecycles.

DC/DC Converter

Strobe Flash Unit

Use Scenario: Synchronous rectifier or active clamp switch in non-isolated buck converters powering infotainment head units or ADAS sensors.

IC Role / Device Role / Timing Role: Low-loss PNP switch replacing Schottky diodes in secondary-side regulation, improving light-load efficiency.

Use Value: 140–220 mΩ R_CE(sat) yields lower conduction loss than 0.35 V diode drop at 500 mA, increasing converter efficiency by ~1.2% at 1 A output.

Use Scenario: High-current flash capacitor discharge switch in automotive interior lighting or emergency warning strobes.

IC Role / Device Role / Timing Role: Fast-turn-on PNP switch delivering controlled 2 A pulse to xenon or high-brightness LED arrays.

Use Value: h_FE ≥100 at −2 A ensures full saturation within <1 µs when driven by microcontroller GPIO, enabling precise flash timing control.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP low-V_CE(sat) switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor NSS40501MR6T1G	−40 V V_CEO, −1.5 A I_C, R_CE(sat) = 170–270 mΩ at −500 mA - 0.5 A lower current rating; SOT23-3L package identical.	Rated for industrial-grade (not AEC-Q101) use; lacks automotive qualification and extended temperature validation.	Select when AEC-Q101 is not required and peak load current stays ≤1.5 A; verify thermal margin with 300 mW P_tot.
Diodes Incorporated DXT5240P-13	−40 V V_CEO, −2 A I_C, R_CE(sat) = 150–250 mΩ at −500 mA - Matches current rating but has higher typical R_CE(sat) and no published AEC-Q101 status.	Documented for consumer/industrial use only; no automotive stress test data available in public datasheet.	Acceptable for cost-sensitive non-automotive DC/DC or strobe applications where 10–15 mΩ higher R_CE(sat) is tolerable.

Compared with PBSS5240T-QR, NSS40501MR6T1G trades 0.5 A current headroom and automotive qualification for broader distributor availability, while DXT5240P-13 matches current rating but lacks AEC-Q101 validation-making PBSS5240T-QR the sole choice for production automotive systems requiring certified reliability.

Availability

PBSS5240T-QR is available at Aetrix Electronics and suitable for automotive battery management, DC/DC converter power stages, and supply-line switching circuits requiring stable component supply across multi-year production programs.

Supply support for PBSS5240T-QR 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 logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.

PBSS5240T-QR belongs to Nexperia's Automotive Qualified Low V_CE(sat) Transistor product line, engineered specifically for high-reliability, thermally efficient switching in 12 V/24 V automotive subsystems.

FAQ

Is PBSS5240T-QR pin-compatible with its NPN complement PBSS4240T-Q?

Yes - both devices use identical SOT23 (TO-236AB) package with matching pin 1 (base), pin 2 (emitter), pin 3 (collector) assignments. However, circuit polarity must be reversed: PBSS4240T-Q requires NPN biasing (base positive relative to emitter), while PBSS5240T-Q requires PNP biasing (base negative relative to emitter). Layout reuse is possible with netlist inversion.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is −300 mA (single pulse, t_p ≤ 1 ms), but for continuous DC operation, the datasheet specifies −200 mA as the recommended maximum to achieve −2 A collector current while maintaining V_CE(sat) ≤ 350 mV and avoiding thermal runaway. Exceeding −200 mA risks exceeding P_tot = 480 mW under worst-case ambient conditions.

Does PBSS5240T-QR require a heatsink in standard SOT23 mounting?

No - with R_th(j-a) = 260 K/W on a 1 cm² collector copper pad, the device dissipates ≤480 mW at 25 °C ambient, resulting in ΔT = 125 K and T_j = 150 °C maximum. This meets automotive requirements without external heatsinking; however, reducing copper area below 1 cm² or operating above 25 °C ambient requires derating per thermal curves in Figure 6.

How does the AEC-Q101 qualification impact supply chain assurance?

AEC-Q101 qualification confirms that PBSS5240T-QR underwent accelerated stress testing (HTOL, TC, UHAST, etc.) per automotive standards, and Nexperia maintains lot-level traceability, PPAP documentation, and change notification protocols. This enables Aetrix Electronics to guarantee long-term supply continuity, defect rate <100 ppm, and zero-impact change control for Tier 1 automotive programs.

PBSS5240T-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 2 A

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

Vce Saturation (Max) @ Ib, Ic:: 350mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 100mA, 2V

Power - Max:: 300 mW

Frequency - Transition:: 200MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PBSS5240T-QR FAQ

1.How can I place an order for PBSS5240T-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS5240T-QR 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 PBSS5240T-QR reliable?

The price and inventory of PBSS5240T-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS5240T-QR is usually 5 days.

3.What payment methods are accepted for PBSS5240T-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS5240T-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS5240T-QR?

PBSS5240T-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS5240T-QR 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 PBSS5240T-QR?

For technical support, including PBSS5240T-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS5240T-QR requirements.

6.How does Aetrix verify that PBSS5240T-QR is sourced from the original manufacturer or authorized distributors?

All PBSS5240T-QR 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 PBSS5240T-QR meets industry standards.

7.What is the process for return or replacement of PBSS5240T-QR?

All PBSS5240T-QR units undergo pre-shipment inspection (PSI). If there is an issue with PBSS5240T-QR, 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 PBSS5240T-QR part is unused and in its original packaging.

Return procedure for PBSS5240T-QR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…