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

Nexperia USA Inc. PBHV8540X,115

Name: PBHV8540X,115
Brand: Nexperia USA Inc.
SKU: PBHV8540X,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PBHV8540X,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: PBHV8540X,115.pdf

Description:: TRANS NPN 400V 0.5A SOT-89

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PBHV8540X,115 from Nexperia is an NPN high-voltage low V_CEsat transistor in SOT89 package, designed for switching applications requiring 500 V collector-emitter peak voltage, 0.5 A continuous collector current, and typical V_CEsat of 100 mV at IC = 100 mA / IB = 10 mA. It serves as a robust medium-power switch in LED chain drivers and telecom hook-switch circuits.

For engineers reviewing the PBHV8540X,115 datasheet, PBHV8540X,115 pinout, PBHV8540X,115 application, or PBHV8540X,115 equivalent, key selection criteria include verified V_CEsat performance at high V_CEO, thermal resistance (R_th(j-sp) = 20 K/W), h_FE stability across temperature, and SOT89 mounting pad thermal requirements.

Technical Context

This device implements a planar epitaxial high-voltage NPN structure optimized for low saturation voltage under high blocking conditions. Its V_CESM = 500 V and V_CEO = 400 V enable operation in off-line SMPS primary-side snubbers and wired telecom line interface stages where transient overvoltage immunity is critical.

It delivers h_FE = 100–200 at IC = 50 mA and maintains usable gain (h_FE ≥ 10) even at IC = 300 mA with pulsed excitation, supporting reliable base-driven switching in automotive motor management and LCD backlighting circuits without active gate control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CESM	500 V - Peak collector-emitter voltage rating; supports surge-tolerant switching in telecom and SMPS flyback clamp paths.
V_CEO	400 V - DC collector-emitter breakdown voltage; defines maximum steady-state blocking capability with open base.
I_C	0.5 A - Continuous collector current; sets maximum sustained load drive capacity on FR4 PCB with standard footprint.
V_CEsat	100 mV typ. @ IC = 100 mA, IB = 10 mA - Low saturation voltage reduces conduction loss and self-heating in linear-regulated LED drivers.
h_FE	100–200 @ V_CE = 10 V, IC = 50 mA - Sufficient DC current gain to support simple resistor-biased switching without Darlington staging.
R_th(j-sp)	20 K/W - Junction-to-solder-point thermal resistance with 6 cm² collector pad; enables predictable thermal design in space-constrained SMT layouts.
f_T	30 MHz - Transition frequency; supports switching up to ~1–2 MHz in hard-switched topologies with adequate base drive.

Pinout & Package

SOT89 (SC-62) plastic surface-mounted package: 3 leads, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body; collector tab forms exposed thermal pad on lead 2.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter (E)	Reference node for base-emitter bias; connected to ground or low-side return path in common-emitter configurations.
2	Collector (C)	Main power output terminal; electrically and thermally coupled to PCB copper pour via exposed metal tab for heat dissipation.
3	Base (B)	Current-controlled input node; requires external series resistor to limit I_B ≤ 200 mA peak per absolute max ratings.

Key Features

Feature	Design Value
High voltage blocking	V_CESM = 500 V enables direct use in 380 VAC rectified bus interfaces without cascading devices.
Low V_CEsat at high current	V_CEsat = 135 mV max @ IC = 300 mA / IB = 60 mA ensures <150 mW conduction loss in LED string current regulation.
Thermal performance	R_th(j-sp) = 20 K/W with 6 cm² collector pad allows >1 W dissipation at Tamb = 75 °C without heatsink.
Stable h_FE vs. temperature	h_FE remains ≥80 at Tamb = 100 °C (Fig. 4), supporting consistent switching behavior in under-hood automotive modules.
Fast switching	t_on = 6.25 µs and t_off = 3 µs enable efficient operation in 100–500 kHz SMPS auxiliary windings.

Applications

LED Chain Module Driver

LCD Backlighting

Use Scenario: Constant-current switching for multi-LED series strings powered from 24–48 VDC rails.

IC Role / Device Role / Timing Role: High-side or low-side current switch controlling LED current via PWM or analog dimming.

Use Value: Low V_CEsat minimizes power loss and thermal rise in compact LED driver PCBs, extending lifetime of adjacent electrolytic capacitors.

Use Scenario: CCFL or edge-lit LED backlight in industrial panel displays operating at ambient up to 85 °C.

IC Role / Device Role / Timing Role: Linear or switched current source regulating backlight intensity in response to PWM dimming signals.

Use Value: Stable h_FE across temperature ensures consistent brightness control without feedback recalibration.

Automotive Motor Management

Hook Switch for Wired Telecom

Use Scenario: Driving small brushed DC motors (e.g., HVAC actuators, mirror adjusters) in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Low-side switch interfacing microcontroller GPIO to motor winding, handling inductive kickback.

Use Value: 500 V V_CESM withstands L·di/dt transients up to ±100 V during motor commutation without clamping diodes.

Use Scenario: Line interface circuit in VoIP gateways and PSTN adapters managing on-hook/off-hook detection and ringing.

IC Role / Device Role / Timing Role: High-voltage switch isolating ring generator and line sensing circuitry from MCU logic.

Use Value: 400 V V_CEO supports direct connection to POTS lines carrying 90 V RMS ringing signals without level-shifting.

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
PHB10300T,115	V_CEO = 300 V, V_CEsat = 150 mV typ., SOT223 package	Lower voltage rating limits use to sub-250 VDC systems; larger thermal pad improves R_th(j-a) but increases board area.	Select when lower cost and higher thermal margin outweigh need for 400+ V blocking.
BCP56-10,115	V_CEO = 80 V, h_FE = 100–250, same SOT89 footprint	Not suitable for off-line or telecom applications; limited to low-voltage DC motor/relay control.	Choose only for 24 V embedded systems where footprint compatibility is prioritized over voltage rating.

Compared with PHB10300T,115 and BCP56-10,115, PBHV8540X,115 uniquely balances 400 V DC blocking, sub-150 mV V_CEsat, and SOT89 thermal efficiency-making it the only option among the three qualified for LED chain drivers fed from rectified AC mains.

Availability

PBHV8540X,115 is available at Aetrix Electronics and suitable for LED chain module drivers, LCD backlighting circuits, automotive motor management subsystems, and wired telecom hook-switch designs requiring stable component supply and long-term manufacturability.

Supply support for PBHV8540X,115 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-qualified and industrial-grade components.

PBHV8540X,115 belongs to Nexperia's high-voltage bipolar transistor product line, engineered specifically for energy-efficient switching in off-line power supplies, lighting, and telecom infrastructure where low V_CEsat and rugged voltage tolerance are essential.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 200 mA per datasheet Table 5. For continuous DC operation, IB must be limited to ensure junction temperature stays below 150 °C-typically ≤20 mA with adequate PCB copper and ambient ≤75 °C, based on thermal derating curves in Figure 1.

Can PBHV8540X,115 replace BC817 in a 24 V relay driver?

No-PBHV8540X,115 is over-specified for 24 V use: its higher V_CEO and lower h_FE at low IC reduce efficiency and increase base drive burden. BC817 offers better h_FE (160–630) and lower V_CEsat at 100 mA, making it more appropriate for low-voltage relay coils.

Is this part qualified for automotive applications?

No-Revision history (Table 8) explicitly states PBHV8540X v.3 changed to non-automotive qualification. Automotive alternatives (e.g., PBHV8540X-Q) are available separately and undergo AEC-Q101 stress testing; this variant lacks those qualifications and warranty coverage.

How does thermal performance change with reduced PCB copper area?

With standard footprint (no extended collector pad), R_th(j-a) degrades from 83 K/W to 240 K/W (Table 6). At 0.5 A and V_CEsat ≈ 100 mV, power dissipation is ~50 mW-still safe at Tamb = 25 °C-but derating begins sharply above 50 °C ambient without thermal enhancement.

PBHV8540X,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

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:: 520 mW

Frequency - Transition:: 30MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

PBHV8540X,115 FAQ

1.How can I place an order for PBHV8540X,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PBHV8540X,115 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 PBHV8540X,115 reliable?

The price and inventory of PBHV8540X,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBHV8540X,115 is usually 5 days.

3.What payment methods are accepted for PBHV8540X,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBHV8540X,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PBHV8540X,115?

PBHV8540X,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PBHV8540X,115 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 PBHV8540X,115?

For technical support, including PBHV8540X,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBHV8540X,115 requirements.

6.How does Aetrix verify that PBHV8540X,115 is sourced from the original manufacturer or authorized distributors?

All PBHV8540X,115 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 PBHV8540X,115 meets industry standards.

7.What is the process for return or replacement of PBHV8540X,115?

All PBHV8540X,115 units undergo pre-shipment inspection (PSI). If there is an issue with PBHV8540X,115, 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 PBHV8540X,115 part is unused and in its original packaging.

Return procedure for PBHV8540X,115:

1.Submit a request within 90 days.

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

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