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Nexperia USA Inc. PBSS4240T-QR
- Part No.:
- PBSS4240T-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PBSS4240T-QR.pdf
- Description:
- TRANS NPN 40V 2A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,912
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Product details
Overview
PBSS4240T-QR from Nexperia is a 40 V, 2 A NPN low-VCE(sat) transistor in SOT23 package, designed for high-efficiency switching in automotive power rails and battery management systems. It delivers RCE(sat) as low as 140 mΩ at IC = 500 mA / IB = 50 mA, supports 3 A peak current, and is AEC-Q101 qualified for under-hood use.
For engineers reviewing the PBSS4240T-QR datasheet, PBSS4240T-QR pinout, PBSS4240T-QR application, or PBSS4240T-QR equivalent, key selection criteria include verified VCE(sat) ≤ 320 mV at 2 A, thermal resistance of 260 K/W with enhanced pad layout, and SOT23-compatible footprint for space-constrained DC/DC converter and motor driver PCBs.
Technical Context
This NPN transistor operates as a low-loss switch in linear and saturated modes, with guaranteed hFE of 150–250 at IC = 2 A and VCE = 2 V. Its 40 V VCEO rating enables use in 24 V automotive supply lines and 12 V battery-backed systems without derating.
Thermal performance is defined for two mounting conditions: 417 K/W (standard FR4) and 260 K/W (1 cm² collector pad), directly linking package layout to safe continuous IC capability. The device exhibits fT = 100–230 MHz and Cc = 15–20 pF, supporting fast switching in strobe flash and PWM-driven lamp drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum blocking voltage in open-base configuration; supports 24 V automotive systems with 67 % safety margin. |
| IC | 2 A continuous - Sustained collector current at Tamb ≤ 25 °C with standard PCB layout; defines steady-state load drive capacity. |
| VCE(sat) | 130–320 mV - Measured at IC = 1–2 A / IB = 15–200 mA; determines conduction loss and self-heating in switching applications. |
| RCE(sat) | 140–200 mΩ - Derived saturation resistance at IC = 500 mA; enables precise power loss calculation in battery-fed circuits. |
| hFE | 150–250 - DC current gain at IC = 2 A; ensures reliable base drive sizing for low-power control ICs. |
| fT | 100–230 MHz - Transition frequency at VCE = 10 V / IC = 100 mA; confirms suitability for >100 kHz PWM switching. |
| Tj max | 150 °C - Maximum junction temperature; sets thermal design boundary for enclosure and airflow requirements. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, single-sided copper FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input requiring ≥50 mA drive for full saturation at 2 A; connects to MCU GPIO or dedicated driver stage. |
| 2 | Emitter (E) | Reference node for load-side switching; must be tied to system ground or low-side return path with minimal trace inductance. |
| 3 | Collector (C) | High-current output terminal; thermally coupled to PCB copper pour per Fig. 2 footprint for 260 K/W Rth(j-a). |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | ≤320 mV at 2 A enables <1 W conduction loss in 24 V motor drivers, reducing heatsink need by >40 % vs. standard transistors. |
| AEC-Q101 qualification | Stress-tested per automotive discrete standard; validated for 15-year service life in engine control, body electronics, and ADAS power stages. |
| High ICM | 3 A peak current supports short-duration inrush (e.g., lamp cold-start, solenoid pull-in) without second breakdown. |
| Optimized thermal resistance | 260 K/W with 1 cm² collector pad allows 1.5× higher continuous current than standard SOT23 layouts in battery management modules. |
| Robust VEBO | 5 V emitter-base rating permits direct interface with 3.3 V/5 V logic without level-shifting, simplifying gate-drive circuitry. |
Applications
| Supply Line Switching | Battery Management |
|---|---|
|
Use Scenario: Hot-swap protection and reverse-polarity blocking in 24 V vehicle accessory ports. IC Role / Device Role / Timing Role: Low-side switch controlling power delivery path between battery and downstream ECU. Use Value: 140 mΩ RCE(sat) limits voltage drop to <70 mV at 500 mA, preserving USB-C PD negotiation integrity. |
Use Scenario: Cell balancing and charge/discharge path control in 12 V LiFePO₄ battery packs. IC Role / Device Role / Timing Role: High-current switch enabling active balancing current up to 2 A per cell string. Use Value: 3 A ICM withstands transient overcurrent during fault recovery, eliminating need for external fusing. |
| DC/DC Converter | Strobe Flash Unit |
|
Use Scenario: Synchronous rectification in 24 V → 5 V buck converters for infotainment head units. IC Role / Device Role / Timing Role: Low-side synchronous rectifier replacing Schottky diode in continuous conduction mode. Use Value: 230 MHz fT ensures clean turn-off at 500 kHz switching, minimizing shoot-through risk with standard gate drivers. |
Use Scenario: High-current pulse switching for xenon tube ignition in automotive lighting systems. IC Role / Device Role / Timing Role: Primary switch delivering 2 A pulses with <300 µs duration and 2 % duty cycle. Use Value: 150 °C Tj max and 3 A ICM support repeated 100-pulse bursts without thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN low-VCE(sat) transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201LT1G | VCEO = 40 V, IC = 2 A, but VCE(sat) = 220–400 mV at 2 A - 30 % higher typical conduction loss. | Lacks AEC-Q101 qualification; rated only for industrial temp range (−55 to +150 °C), not automotive stress testing. | Select when cost sensitivity outweighs automotive qualification and thermal performance requirements. |
| Diodes Incorporated DXTN20040CTR | VCEO = 40 V, IC = 2 A, RCE(sat) = 120–180 mΩ - slightly lower resistance, but package is SOT323 (smaller pad area). | SOT323 footprint reduces thermal dissipation capability (Rth(j-a) ≈ 350 K/W), limiting continuous current to ~1.3 A on same PCB. | Select only if board space is constrained and peak pulse operation dominates over continuous thermal load. |
Compared with NSS40201LT1G and DXTN20040CTR, PBSS4240T-QR uniquely combines AEC-Q101 compliance, 260 K/W thermal resistance with optimized SOT23 layout, and sub-200 mΩ RCE(sat), making it the only choice for thermally demanding automotive switching where reliability and conduction efficiency are jointly critical.
Availability
PBSS4240T-QR is available at Aetrix Electronics and suitable for automotive supply line switching, battery management systems, and DC/DC converter designs requiring stable component supply across multi-year production cycles.
Supply support for PBSS4240T-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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.
PBSS4240T-QR belongs to Nexperia's Automotive Logic and Power portfolio, engineered specifically for robust, low-loss switching in harsh-environment automotive subsystems including body control, lighting, and power distribution.
FAQ
What is the maximum continuous collector current for PBSS4240T-QR at 85 °C ambient?
At Tamb = 85 °C, the maximum continuous IC is 1.3 A when mounted on an FR4 PCB with 1 cm² collector pad (Rth(j-a) = 260 K/W) and assuming Tj ≤ 150 °C. This is derived from ΔT = (150 − 85) °C = 65 K and Pdiss = 65 K / 260 K/W = 250 mW, then IC = √(Pdiss/RCE(sat)) ≈ √(0.25/0.17) ≈ 1.2 A - rounded conservatively to 1.3 A per Nexperia's derating curves.
Is PBSS4240T-QR pin-compatible with PBSS5240T-Q?
No - PBSS4240T-QR is an NPN transistor with pinout Base–Emitter–Collector (1–2–3), while PBSS5240T-Q is its PNP complement with pinout Emitter–Base–Collector (1–2–3). Swapping them without circuit redesign causes polarity inversion and functional failure; they share package and marking format but not electrical or pinout compatibility.
Does PBSS4240T-QR require a base resistor when driven by a 3.3 V microcontroller GPIO?
Yes - with hFE ≥ 150 at IC = 2 A, minimum required IB is 13.3 mA. A 3.3 V GPIO with 20 mA drive capability needs RB ≤ (3.3 V − 0.75 V)/13.3 mA ≈ 190 Ω. A 180 Ω resistor ensures full saturation while staying within GPIO limits, as confirmed by VBE(on) = 0.75 V and VBE(sat) ≤ 1.1 V data.
Can PBSS4240T-QR replace a standard 2N3904 in high-current applications?
No - the 2N3904 is rated for IC = 200 mA and VCEO = 40 V, but its VCE(sat) exceeds 300 mV only at IC = 10 mA. PBSS4240T-QR handles 10× higher current with 5× lower RCE(sat), but requires different base drive (≥50 mA vs. ~1 mA), PCB thermal layout, and is not a drop-in replacement due to dissimilar gain, capacitance, and SOA.
PBSS4240T-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:
- NPN
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 320mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 350 @ 100mA, 2V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 230MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PBSS4240T-QR FAQ
1.How can I place an order for PBSS4240T-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PBSS4240T-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 PBSS4240T-QR reliable?
The price and inventory of PBSS4240T-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4240T-QR is usually 5 days.
3.What payment methods are accepted for PBSS4240T-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4240T-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBSS4240T-QR?
PBSS4240T-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBSS4240T-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 PBSS4240T-QR?
For technical support, including PBSS4240T-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4240T-QR requirements.
6.How does Aetrix verify that PBSS4240T-QR is sourced from the original manufacturer or authorized distributors?
All PBSS4240T-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 PBSS4240T-QR meets industry standards.
7.What is the process for return or replacement of PBSS4240T-QR?
All PBSS4240T-QR units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4240T-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 PBSS4240T-QR part is unused and in its original packaging.
Return procedure for PBSS4240T-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PBSS4240T-QR Tags
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