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

Nexperia USA Inc. BCP51,115

Name: BCP51,115
Brand: Nexperia USA Inc.
SKU: BCP51,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP51,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: BCP51,115.pdf

Description:: TRANS PNP 45V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BCP51,115 from Nexperia is a PNP medium-power bipolar junction transistor in SOT223 (SC-73) surface-mount package, rated for −45 V V_CEO, −1 A continuous collector current, and 0.65 W power dissipation on standard FR4 PCB. It features three h_FE gain selections (63–250), AEC-Q101 qualification, and an exposed collector pad for thermal and electrical conduction-used in linear voltage regulators and high-side switches in automotive body control modules.

For engineers reviewing the BCP51,115 datasheet, BCP51,115 pinout, BCP51,115 application, or BCP51,115 equivalent, this page delivers verified pin configuration, thermal resistance values (R_th(j-a) = 192 K/W standard footprint), h_FE selection codes (−10/−16), saturation voltage (V_CEsat ≤ −0.5 V at I_C = −500 mA), and AEC-Q101 compliance status-critical for automotive power management design validation.

Technical Context

The BCP51,115 operates as a PNP switching and linear amplification device with DC current gain (h_FE) specified at V_CE = −2 V and I_C = −150 mA across two gain bins: 63–160 (−10 variant) and 100–250 (−16 variant). Its collector-emitter saturation voltage remains ≤ −0.5 V under I_C/I_B = 10 drive conditions, enabling efficient high-side switch operation.

Thermal performance is defined by junction-to-ambient resistance of 192 K/W on standard FR4 (single-sided, tin-plated), dropping to 93 K/W with a 6 cm² collector copper pad. The SOT223 package integrates four leads, with pins 2 and 4 both connected to the collector for enhanced heat spreading and low-inductance current paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V - Maximum safe collector-emitter voltage with base open; defines breakdown margin in high-side switch applications.
I_C	−1 A - Continuous DC collector current rating; supports load switching up to 1 A in battery-driven devices.
P_tot	0.65 W - Total power dissipation on standard FR4 PCB; requires thermal pad layout for >0.65 W operation.
h_FE	63–250 - DC current gain range at V_CE = −2 V, I_C = −150 mA; binning enables precise biasing in regulator feedback loops.
V_CEsat	≤ −0.5 V - Collector-emitter saturation voltage at I_C = −500 mA, I_B = −50 mA; ensures low conduction loss in switching mode.
R_th(j-a)	192 K/W - Junction-to-ambient thermal resistance on standard FR4; determines temperature rise under steady-state power dissipation.
AEC-Q101	Qualified - Certified for automotive use per Stress Test Qualification for Discrete Semiconductors; valid for under-hood and body electronics.

Pinout & Package

SOT223 (SC-73) plastic surface-mounted package with 4 leads and exposed collector thermal pad; lead-free, RoHS-compliant, and qualified per AEC-Q101.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control input for transistor turn-on/turn-off; requires current-limited drive to achieve target I_C/I_B ratio.
2	Collector	Main power output terminal; electrically and thermally connected to exposed pad for heat sinking and low-impedance return path.
3	Emiter	Common reference node for PNP operation; tied to higher potential rail (e.g., battery +) in high-side switch configurations.
4	Collector	Second collector connection-parallel to Pin 2-to reduce thermal resistance and improve current sharing in high-power layouts.

Key Features

Feature	Design Value
Three h_FE selections	Gain bins (−10: 63–160; −16: 100–250) enable consistent biasing across production lots in precision linear regulators.
Exposed collector pad	Thermal resistance reduced to 16 K/W (junction-to-solder point); allows direct PCB copper pour attachment for thermal management.
AEC-Q101 qualification	Validated for automotive ambient temperatures (−55 °C to +150 °C) and mechanical stress; supports body control, lighting, and HVAC modules.
High power dissipation	Up to 1.35 W with 6 cm² collector pad-enables compact designs without external heatsinks in space-constrained modules.
Leadless SMD compatibility	SOT223 footprint supports automated reflow assembly; solder land pattern defined per Nexperia's sot223_fr specification (6.15 mm × 3.85 mm).

Applications

Linear Voltage Regulators

High-Side Switches

Use Scenario: Used as pass transistor in adjustable LDOs supplying 3.3 V/5 V rails to microcontrollers in automotive ECUs.

IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via emitter-follower configuration with feedback to base.

Use Value: Low V_CEsat (≤ −0.5 V) minimizes dropout voltage; h_FE binning ensures stable loop gain across temperature.

Use Scenario: Controls 12 V loads (e.g., fuel pump, window lift motors) directly from MCU GPIO in body control units.

IC Role / Device Role / Timing Role: High-side switch with base driven through current-limiting resistor; emitter tied to battery rail.

Use Value: −45 V V_CEO withstands load-dump transients; AEC-Q101 qualification guarantees reliability in harsh environments.

Battery-Driven Devices

MOSFET Drivers

Use Scenario: Enables reverse-polarity protection and load switching in portable medical monitors powered by Li-ion packs.

IC Role / Device Role / Timing Role: PNP configured as low-leakage series switch between battery and system power domain.

Use Value: ICBO ≤ −100 nA at 25 °C ensures minimal standby current drain; −55 °C to +150 °C operating range supports wide ambient use.

Use Scenario: Drives N-channel MOSFET gates in half-bridge motor drivers for automotive seat adjusters.

IC Role / Device Role / Timing Role: Level-shifting driver stage providing fast turn-on/turn-off current to gate capacitance.

Use Value: f_T = 145 MHz supports >100 kHz switching; high I_CM (−2 A peak) handles gate charge surge during transition.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCX51,115	SOT89 package (3-lead), lower P_tot (0.50 W standard footprint), same −45 V/−1 A ratings and h_FE bins.	Limited thermal mass vs. SOT223; suited for lower-power, space-constrained PCBs where 4-lead mounting is impractical.	Select when board area is critical and power dissipation stays below 0.5 W; verify thermal pad layout per sot089_fr footprint.
BC51PA,115	SOT1061 (HUSON3) package, 2×2×0.65 mm, no leads, R_th(j-a) = 298 K/W (standard footprint), same electrical specs.	Ultra-thin profile for wearables or stacked modules; requires 4-layer PCB or large copper pour to match SOT223 thermal performance.	Choose for ultra-low-profile designs accepting higher thermal resistance; confirm reflow profile matches sot1061_fr solder paste volume.

Compared with BCX51,115 and BC51PA,115, the BCP51,115 offers superior thermal performance via its dual-collector SOT223 package and highest standard-power rating (0.65 W), making it optimal for automotive linear regulation and high-current switching where thermal headroom is constrained.

Availability

BCP51,115 is available at Aetrix Electronics and suitable for automotive body control modules, industrial linear regulators, and battery-powered medical devices requiring stable component supply and AEC-Q101 compliance.

Supply support for BCP51,115 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The BCP51,115 belongs to Nexperia's PNP medium-power transistor product line, engineered for robust operation in automotive power management and industrial switching applications where thermal resilience and AEC-Q101 qualification are mandatory.

FAQ

What does the "115" suffix in BCP51,115 indicate?

The "115" suffix denotes the specific tape-and-reel packing method: 8 mm pitch, 12 mm tape, 1000-unit reel quantity per IEC standard packaging code. It does not affect electrical characteristics or package dimensions-only logistics and handling format.

Is BCP51,115 pin-compatible with BCX51,115 or BC51PA,115?

No-BCP51,115 uses SOT223 (4-lead, pins 2+4 = collector), BCX51,115 uses SOT89 (3-lead, pin 2 = collector), and BC51PA,115 uses SOT1061 (3-terminal, no leads). Footprints, thermal pads, and pin assignments differ; PCB redesign is required for substitution.

How does the dual-collector configuration (Pins 2 and 4) impact layout?

Pins 2 and 4 are internally shorted to the same collector node and thermal pad. Layout must connect both to the same large copper pour for optimal thermal conduction and current sharing; splitting them degrades R_th(j-a) and increases local heating.

Can BCP51,115 replace BC807-25 in a 5 V regulator circuit?

No-BC807-25 is an SOT23 PNP with −45 V/−0.5 A rating and h_FE = 160–400. BCP51,115 has higher current (−1 A) but lower max h_FE (250) and larger SOT223 footprint; substituting requires verifying thermal margin, PCB space, and gain stability in the feedback loop.

BCP51,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-261-4, TO-261AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1 A

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 63 @ 150mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 145MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BCP51,115 FAQ

1.How can I place an order for BCP51,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP51,115 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 BCP51,115 reliable?

The price and inventory of BCP51,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP51,115 is usually 5 days.

3.What payment methods are accepted for BCP51,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP51,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP51,115?

BCP51,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP51,115 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 BCP51,115?

For technical support, including BCP51,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP51,115 requirements.

6.How does Aetrix verify that BCP51,115 is sourced from the original manufacturer or authorized distributors?

All BCP51,115 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 BCP51,115 meets industry standards.

7.What is the process for return or replacement of BCP51,115?

All BCP51,115 units undergo pre-shipment inspection (PSI). If there is an issue with BCP51,115, 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 BCP51,115 part is unused and in its original packaging.

Return procedure for BCP51,115:

1.Submit a request within 90 days.

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

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