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

Nexperia USA Inc. PBSS4140T,215

Name: PBSS4140T,215
Brand: Nexperia USA Inc.
SKU: PBSS4140T,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBSS4140T,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: PBSS4140T,215.pdf

Description:: TRANS NPN 40V 1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBSS4140T,215 from Nexperia is a 40 V, 1 A NPN low V_CE(sat) transistor in SOT23 package, designed for high-efficiency switching in battery-powered systems. It delivers 260 mΩ typical R_CE(sat) at I_C = 500 mA / I_B = 50 mA, supports 2 A peak collector current, and operates across −65 °C to +150 °C ambient range - used in LCD backlighting and supply-line switching.

For engineers reviewing the PBSS4140T,215 datasheet, PBSS4140T,215 pinout, PBSS4140T,215 application, or PBSS4140T,215 equivalent, key selection criteria include verified low saturation resistance, thermal performance on FR4 PCBs, SOT23 footprint compatibility, and PNP complement availability (PBSS5140T).

Technical Context

This NPN transistor operates as a saturated switch with guaranteed V_CE(sat) ≤ 500 mV at I_C = 1 A / I_B = 100 mA and exhibits h_FE ≥ 200 at I_C = 1 A. Its 40 V V_CEO rating and 5 V V_EBO support robust operation in portable DC-DC and load-switching topologies.

Thermal design is enabled by two validated R_th(j-a) values: 417 K/W (standard FR4) and 278 K/W (enhanced pad), directly tied to defined PCB layout conditions. The device's f_T of 150 MHz confirms suitability for moderate-speed digital switching, not RF amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	40 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in switching circuits.
I_C	1 A continuous - Rated DC collector current; determines steady-state load-handling capability.
R_CE(sat)	260–500 mΩ - On-resistance under pulsed 500 mA/50 mA drive; directly impacts conduction loss and self-heating.
h_FE	≥200 at I_C = 1 A - Minimum DC current gain ensures reliable saturation with modest base drive.
P_tot	450 mW - Max power dissipation with 1 cm² collector pad; sets thermal derating boundary at elevated T_amb.
f_T	150 MHz - Transition frequency confirms adequate bandwidth for <100 ns switching edges in digital control.

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration with standard footprint per Fig. 7 (reflow) and Fig. 8 (wave).

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input requiring ~100 mA peak drive for full saturation at 1 A collector current.
2	Emitter (E)	Reference node for bias network; connects to ground or low-side return path in common-emitter switches.
3	Collector (C)	High-current output terminal; thermally coupled to PCB pad per thermal spec [2] for 278 K/W R_th(j-a).

Key Features

Feature	Design Value
Low V_CE(sat)	≤500 mV at I_C = 1 A / I_B = 100 mA - Reduces conduction loss by >40% vs. standard transistors in 3.3 V/5 V rails.
High I_CM	2 A peak (tp ≤ 1 ms) - Supports surge currents in motor start-up or capacitor charging without failure.
Thermal reliability	R_th(j-a) = 278 K/W with 1 cm² collector pad - Enables 1 A operation up to +85 °C ambient without heatsink.
Robust breakdown margins	V_CBO = V_CEO = 40 V, V_EBO = 5 V - Ensures immunity to transient overshoot in battery-connected loads.

Applications

LCD Backlight Control

Supply Line Switching

Use Scenario: Driving white LED strings in handheld displays using PWM dimming at 1–10 kHz.

IC Role / Device Role / Timing Role: Low-loss NPN switch placed between LED cathode and ground, operating in saturated on/off mode.

Use Value: 260 mΩ R_CE(sat) limits voltage drop to <260 mV at 1 A, preserving >92% of forward voltage margin for LED string regulation.

Use Scenario: Enabling/disabling 3.3 V or 5 V power rails to peripherals in mobile phones and video cameras.

IC Role / Device Role / Timing Role: High-side or low-side load switch controlled by base driver IC or microcontroller GPIO.

Use Value: 40 V V_CEO accommodates input surges up to ±10% tolerance; 150 MHz f_T ensures clean turn-on/turn-off edges below 100 ns.

Battery Protection Circuit

Audio Muting Switch

Use Scenario: Isolating battery terminals during overcurrent or thermal fault conditions in portable equipment.

IC Role / Device Role / Timing Role: Current-sense-triggered cutoff switch placed in series with battery discharge path.

Use Value: 2 A I_CM withstands short-circuit transients; 150 °C T_j(max) enables operation near battery cells without thermal shutdown.

Use Scenario: Inserting a DC-blocking path in audio amplifier outputs to prevent pop noise during power sequencing.

IC Role / Device Role / Timing Role: Fast-turnoff mute switch shunting amplifier output to ground during power-up/down transitions.

Use Value: 500 mV V_CE(sat) ensures <0.5 dB signal attenuation in active state; 100 nA I_CES prevents leakage-induced distortion.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMN2004K-7	20 V V_CEO, 4.2 A I_C, SOT23-3; MOSFET with ~30 mΩ R_DS(on)	Lower voltage rating; requires gate drive >2.5 V; no base current needed	Select when higher current and lower on-resistance justify gate driver complexity and reduced voltage margin.
PBSS4041T,215	40 V V_CEO, 1 A I_C, but 350–700 mΩ R_CE(sat) (typ/max); same SOT23 package	Higher saturation resistance increases conduction loss by ~35% at 500 mA	Choose only if PBSS4140T,215 is unavailable and thermal budget allows 10–15 °C higher junction rise.

Compared with DMN2004K-7 and PBSS4041T,215, PBSS4140T,215 uniquely balances 40 V ruggedness, sub-500 mV saturation, and zero-gate-drive simplicity - making it optimal for cost-sensitive, thermally constrained 1 A switching where MOSFET gate drive overhead is undesirable.

Availability

PBSS4140T,215 is available at Aetrix Electronics and suitable for LCD backlighting, supply line switching, and battery-driven equipment requiring stable component supply and consistent SOT23 assembly compatibility.

Supply support for PBSS4140T,215 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-grade and industrial power semiconductors.

PBSS4140T,215 belongs to Nexperia's "Low V_CE(sat) Transistor" product line, engineered specifically for energy-efficient switching in space-constrained portable electronics and battery management systems.

FAQ

What is the maximum continuous collector current for PBSS4140T,215?

The absolute maximum continuous collector current (I_C) is 1 A at T_amb ≤ 25 °C with proper PCB thermal relief. Derating applies above 25 °C: at 85 °C ambient, max I_C drops to ~0.7 A based on 450 mW P_tot and 278 K/W R_th(j-a) with enhanced pad layout.

Does PBSS4140T,215 require a base resistor, and how is its value calculated?

Yes - a base resistor is required to limit I_B. For full saturation at I_C = 1 A, use h_FE(min) = 200 and target I_B ≥ 5 mA. With 3.3 V GPIO drive and V_BE(sat) ≈ 1.2 V, R_B = (3.3 V − 1.2 V)/5 mA = 420 Ω; 470 Ω is standard and sufficient.

Can PBSS4140T,215 replace a standard general-purpose transistor like BC847?

No - BC847 has V_CEO = 45 V but R_CE(sat) > 1 Ω at similar current, resulting in >1 V drop and excessive heat. PBSS4140T,215's 260 mΩ R_CE(sat) cuts conduction loss by ~75%, enabling higher efficiency in battery loads where BC847 would thermally saturate.

Is PBSS4140T,215 automotive qualified?

No - this device is not AEC-Q101 qualified. Nexperia explicitly states in Section 14 that non-automotive qualified products like PBSS4140T,215 are unsuitable for safety-critical or life-support systems; it is intended for consumer and industrial portable equipment only.

PBSS4140T,215 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):: 1 A

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

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 100mA, 1A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 500mA, 5V

Power - Max:: 450 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PBSS4140T,215 FAQ

1.How can I place an order for PBSS4140T,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBSS4140T,215 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 PBSS4140T,215 reliable?

The price and inventory of PBSS4140T,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBSS4140T,215 is usually 5 days.

3.What payment methods are accepted for PBSS4140T,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBSS4140T,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBSS4140T,215?

PBSS4140T,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBSS4140T,215 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 PBSS4140T,215?

For technical support, including PBSS4140T,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBSS4140T,215 requirements.

6.How does Aetrix verify that PBSS4140T,215 is sourced from the original manufacturer or authorized distributors?

All PBSS4140T,215 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 PBSS4140T,215 meets industry standards.

7.What is the process for return or replacement of PBSS4140T,215?

All PBSS4140T,215 units undergo pre-shipment inspection (PSI). If there is an issue with PBSS4140T,215, 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 PBSS4140T,215 part is unused and in its original packaging.

Return procedure for PBSS4140T,215:

1.Submit a request within 90 days.

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

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