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

Nexperia USA Inc. PBHV8540T-QR

Name: PBHV8540T-QR
Brand: Nexperia USA Inc.
SKU: PBHV8540T-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBHV8540T-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: PBHV8540T-QR.pdf

Description:: TRANS NPN 400V 0.5A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,978

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Product details

Overview

PBHV8540T-QR from Nexperia is an AEC-Q101-qualified NPN high-voltage low-V_CEsat transistor in SOT23 package, rated for 500 V V_CESM, 0.5 A continuous collector current, and 135 mV typical V_CEsat at I_C = 300 mA / I_B = 60 mA. It serves as a robust switching element in automotive and industrial high-voltage DC-DC and lamp driver circuits.

For engineers reviewing the PBHV8540T-QR datasheet, PBHV8540T-QR pinout, PBHV8540T-QR application, or PBHV8540T-QR equivalent, key selection criteria include its 400 V V_CEO, 150 °C max junction temperature, AEC-Q101 qualification, low saturation voltage under high-current drive, and SOT23 footprint compatibility with space-constrained automotive modules.

Technical Context

This device operates as a high-voltage NPN switch optimized for fast turn-on/turn-off (t_on = 6.25 µs, t_off = 3 µs) and low conduction loss in inductive load switching. Its h_FE remains usable up to 300 mA (min 10 at I_C = 300 mA), enabling direct microcontroller GPIO drive without external amplification in many cases.

Thermal design is supported by R_th(j-sp) = 70 K/W to solder point and power derating down to zero at 125 °C ambient on FR4 PCB. The 6 V V_EBO rating allows safe base biasing in systems with transient-coupled control lines.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CESM	500 V peak - enables use in 400 V DC bus applications with margin against transients
V_CEO	400 V - maximum sustainable collector-emitter voltage with open base, defining safe blocking range
I_C	0.5 A continuous - supports LED chain drivers and HID ballast loads without heatsinking at <25 °C ambient
V_CEsat	135 mV typ at I_C = 300 mA / I_B = 60 mA - reduces conduction loss to <40 mW in typical switching operation
h_FE	100–200 at I_C = 50 mA - ensures reliable saturation with standard 5 V logic-level base drive
f_T	30 MHz - sufficient for SMPS operation up to ~500 kHz with margin for layout parasitics
R_th(j-sp)	70 K/W - enables thermal coupling to PCB copper for passive cooling in automotive modules

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, FR4-compatible footprint per Fig. 13 and Fig. 14 of datasheet.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control input requiring ≥60 mA peak drive for full saturation at 300 mA collector current
2	Emitter (E)	Reference node for base drive and collector current return; connected to system ground or low-side return path
3	Collector (C)	High-voltage switched output node; rated for 500 V peak and 0.5 A DC in automotive ambient conditions

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive motor management and lighting per stress test requirements including HTGB, HTRB, and ESD
Low V_CEsat at high I_C	135 mV typical at 300 mA enables >98 % efficiency in 12 V–48 V LED driver stages
High V_CESM	500 V rating supports direct interface to 380 V rectified AC inputs or 400 V battery systems with safety margin
High h_FE at 100 mA	Min 80 at I_C = 100 mA allows use with 10 kΩ base resistor from 5 V MCU, reducing BOM count
Small SOT23 footprint	Enables placement in tight spaces such as LED headlamp modules and telecom hook-switch PCBs

Applications

Electronic Ballast

Automotive Motor Management

Use Scenario: High-frequency switching in fluorescent lamp ballasts operating from rectified 230 V AC.

IC Role / Device Role / Timing Role: Main switching transistor controlling resonant tank current and lamp ignition.

Use Value: 500 V V_CESM withstands line transients; low V_CEsat minimizes heat in sealed ballast enclosures.

Use Scenario: PWM-controlled fuel pump or radiator fan driver in 12 V/24 V vehicle systems.

IC Role / Device Role / Timing Role: Low-side switch interfacing MCU PWM output to inductive motor load.

Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; 150 °C T_jmax supports under-hood mounting.

LED Chain Driver

SMPS Primary Switch

Use Scenario: Constant-current switching regulator driving 10–20 V LED strings in commercial signage.

IC Role / Device Role / Timing Role: Synchronous rectifier or main pass switch in buck topology.

Use Value: 0.5 A I_C and 135 mV V_CEsat enable compact, thermally efficient designs without forced air cooling.

Use Scenario: 50–100 kHz flyback converter primary-side switch in automotive infotainment power supply.

IC Role / Device Role / Timing Role: High-voltage switching element handling reflected output voltage plus leakage spikes.

Use Value: 400 V V_CEO accommodates 380 V reflected voltage + 20 V margin; f_T = 30 MHz supports clean gate drive.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage NPN switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PHV8540T-Q	Same die, non-automotive grade; lacks AEC-Q101 qualification and has wider V_CEsat tolerance (135–250 mV vs. 135 mV typ)	Acceptable for industrial lighting but not certified for automotive ECUs or ADAS modules	Select when cost sensitivity outweighs automotive compliance requirements
BCX56-16Q	Lower V_CEO (80 V), higher h_FE (160 min), same SOT23 package but no AEC-Q101 or high-voltage rating	Only suitable for ≤60 V DC applications like consumer appliance motor control	Choose only if system voltage is below 100 V and automotive qualification is unnecessary

Compared with PHV8540T-Q and BCX56-16Q, PBHV8540T-QR uniquely combines AEC-Q101 compliance, 400 V blocking, and sub-150 mV V_CEsat, making it the sole option among the three qualified for 12 V–48 V automotive lighting and motor control where both reliability and efficiency are critical.

Availability

PBHV8540T-QR is available at Aetrix Electronics and suitable for electronic ballasts, automotive motor management systems, and LED chain drivers requiring stable component supply across extended production lifecycles.

Supply support for PBHV8540T-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 specializing in high-performance, high-reliability discrete and logic devices, with core expertise in automotive-grade components and advanced packaging.

PBHV8540T-QR belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for automotive lighting, motor control, and industrial power conversion where AEC-Q101 compliance and low conduction loss are mandatory.

FAQ

Is PBHV8540T-QR pin-compatible with standard SOT23 NPN transistors?

Yes - PBHV8540T-QR uses standard SOT23 pinout (1 = Base, 2 = Emitter, 3 = Collector) and matches JEDEC TO-236AB mechanical dimensions. It replaces legacy parts like MMBT4401 or BC817 in high-voltage applications, though electrical ratings differ significantly.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 200 mA (single pulse, t_p ≤ 1 ms), but for continuous DC operation, I_B must be limited to ensure junction temperature stays within 150 °C. At I_C = 0.5 A and h_FE = 100, 5 mA base current suffices; practical designs use 10–20 mA for margin.

Can PBHV8540T-QR be used in linear regulator applications?

No - it is optimized for switching operation, not linear regulation. Its SOA is limited: at V_CE = 20 V, maximum continuous I_C drops to ~150 mA due to P_tot = 300 mW and thermal resistance. Linear use risks thermal runaway and premature failure.

Does PBHV8540T-QR require a base resistor when driven by a 3.3 V MCU?

Yes - a base resistor is required to limit I_B and ensure saturation. For 3.3 V drive and target I_B = 10 mA, a 330 Ω resistor provides appropriate bias while accommodating V_BEsat ≈ 0.95 V. Lower resistance increases drive strength but raises MCU output current demand.

PBHV8540T-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):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 400 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 60mA, 300mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 50mA, 10V

Power - Max:: 300 mW

Frequency - Transition:: 30MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PBHV8540T-QR FAQ

1.How can I place an order for PBHV8540T-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PBHV8540T-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 PBHV8540T-QR reliable?

The price and inventory of PBHV8540T-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBHV8540T-QR is usually 5 days.

3.What payment methods are accepted for PBHV8540T-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBHV8540T-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBHV8540T-QR?

PBHV8540T-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBHV8540T-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 PBHV8540T-QR?

For technical support, including PBHV8540T-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBHV8540T-QR requirements.

6.How does Aetrix verify that PBHV8540T-QR is sourced from the original manufacturer or authorized distributors?

All PBHV8540T-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 PBHV8540T-QR meets industry standards.

7.What is the process for return or replacement of PBHV8540T-QR?

All PBHV8540T-QR units undergo pre-shipment inspection (PSI). If there is an issue with PBHV8540T-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 PBHV8540T-QR part is unused and in its original packaging.

Return procedure for PBHV8540T-QR:

1.Submit a request within 90 days.

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

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