Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BCX51-16,115

Name: BCX51-16,115
Brand: Nexperia USA Inc.
SKU: BCX51-16,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCX51-16,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX51-16,115.pdf

Description:: TRANS PNP 45V 1A SOT-89

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,288

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCX51-16,115 from Nexperia is a PNP medium power transistor in SOT89 surface-mount package, rated for −45 V V_CEO, −1 A continuous collector current, and 0.50 W power dissipation on standard FR4 PCB. It features h_FE selection of 100–250 at V_CE = −2 V and I_C = −150 mA, AEC-Q101 qualification, and optimized thermal performance via exposed collector pad. Used in high-side switches and linear voltage regulators for automotive and industrial power management.

For engineers reviewing the BCX51-16,115 datasheet, BCX51-16,115 pinout, BCX51-16,115 application, or BCX51-16,115 equivalent, this page delivers verified electrical parameters, validated SOT89 pin mapping, real-world use cases in battery-driven devices and MOSFET drivers, and confirmed AEC-Q101 qualification status - all grounded in Nexperia's Rev. 9 product data sheet.

Technical Context

This PNP bipolar junction transistor operates in linear and switching modes with fixed emitter-base and collector-emitter polarity. Its SOT89 package integrates a thermally enhanced collector pad directly soldered to PCB copper for low R_th(j-sp) (16 K/W) and stable operation up to 150 °C junction temperature.

Designed for medium-power analog and power control functions, it supports DC current gain ranging from 100 to 250 under standardized test conditions (V_CE = −2 V, I_C = −150 mA), with guaranteed −0.5 V V_CE(sat) at I_C = −500 mA / I_B = −50 mA and 145 MHz f_T for moderate-frequency amplification.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V: Maximum safe collector-emitter voltage with base open; defines upper rail limit in high-side switch designs.
I_C	−1 A continuous: Sustained collector current capability under standard FR4 PCB mounting; enables 1 W-level linear regulation.
h_FE (selection −16)	100–250 at V_CE = −2 V, I_C = −150 mA: Tight DC gain binning ensures predictable base drive requirements in feedback circuits.
V_CE(sat)	≤ −0.5 V at I_C = −500 mA, I_B = −50 mA: Low saturation voltage minimizes conduction loss in switching applications.
P_tot	0.50 W on standard FR4 (single-sided, tin-plated): Power handling capacity without heatsink; derates linearly above 25 °C ambient.
f_T	145 MHz: Transition frequency enabling stable small-signal amplification up to mid-VHF range.
R_th(j-sp)	16 K/W: Junction-to-solder-point thermal resistance; enables rapid heat transfer to PCB copper plane.

Pinout & Package

SOT89 (SC-62/TO-243) plastic surface-mounted package with 3 leads and exposed collector pad for thermal and electrical conductivity. Dimensions: 4.6 × 4.4 × 1.8 mm; body thickness 1.4 mm; lead pitch 2.3 mm.

Pin	Circuit Role	Design Meaning
1	Emitter	Current exit terminal; connected to load ground or reference node in high-side configuration.
2	Collector	Main power terminal with exposed pad; must be soldered to ≥1 cm² copper area for rated power dissipation.
3	Base	Control input; requires current-limited drive (max −0.3 A) to avoid damage during switching transients.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, humidity testing, and ESD robustness per JESD22 standards.
Three h_FE selections	Selection −16 (100–250) enables precise base current sizing in production designs without gain margin overdesign.
Exposed collector pad	Direct thermal path to PCB reduces R_th(j-a) to 250 K/W (standard footprint) and 93 K/W (6 cm² pad), improving thermal stability.
High power dissipation	1.35 W achievable with 6 cm² collector pad on FR4 - 2.7× higher than standard footprint rating.
Low V_CE(sat)	≤ −0.5 V at I_C/I_B = 10 ensures <100 mW conduction loss at 500 mA, critical for efficiency in battery-powered systems.

Applications

Linear Voltage Regulators

High-Side Switches

Use Scenario: Adjustable LDO output stage in automotive body control modules requiring 3.3 V/5 V rails from 12 V battery.

IC Role / Device Role / Timing Role: Pass transistor controlling output voltage via feedback loop; operates in active region with constant V_CE ≈ 2 V.

Use Value: Stable h_FE binning (100–250) ensures consistent loop gain across production units; AEC-Q101 qualification guarantees operation at −40 °C to +125 °C ambient.

Use Scenario: Load switching for LED lighting or solenoid drivers in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: High-side PNP switch controlled by microcontroller GPIO; collector tied to supply, emitter to load.

Use Value: −0.5 V V_CE(sat) limits dropout to <0.5 V at 500 mA, preserving >95% supply voltage at load; exposed collector pad sustains 1.35 W pulsed loads.

Battery-Driven Devices

MOSFET Drivers

Use Scenario: Reverse-polarity protection and load disconnect in portable medical monitors powered by Li-ion cells.

IC Role / Device Role / Timing Role: Series PNP switch between battery and system; base driven through resistor network for controlled turn-on/turn-off.

Use Value: −45 V V_CEO withstands load-dump transients up to 40 V; low I_CBO (≤−100 nA) prevents leakage-induced battery drain during standby.

Use Scenario: Level-shifting gate driver for N-channel high-side MOSFETs in half-bridge motor controllers.

IC Role / Device Role / Timing Role: Active pull-up device charging MOSFET gate capacitance rapidly while sinking base current during discharge.

Use Value: 145 MHz f_T supports fast switching transitions; −2 A I_CM peak rating handles gate charge surge without secondary breakdown.

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
BCX51-10,115	h_FE bin 63–160 (lower gain range); identical V_CEO, I_C, package, and thermal specs.	Suitable where lower base drive current is preferred or gain tolerance can be relaxed.	Select when circuit gain margin allows reduced h_FE variability; same footprint and layout.
BCP51-16,115	SOT223 package (4-lead, larger thermal pad); same −45 V/−1 A rating but higher P_tot (0.65 W standard).	Better suited for higher-power linear regulation where PCB space permits larger footprint.	Choose for improved thermal performance in space-tolerant designs; not drop-in due to different pinout and land pattern.

Compared with BCX51-16,115, the −10 variant offers lower base current demand at cost of gain consistency, while BCP51-16,115 trades compact SOT89 size for superior thermal headroom - making BCX51-16,115 optimal for space-constrained, AEC-Q101-compliant high-side switching.

Availability

BCX51-16,115 is available at Aetrix Electronics and suitable for automotive body electronics, industrial power management, and battery-powered instrumentation requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX51-16,115 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 components and energy-efficient solutions.

The BCX51 series belongs to Nexperia's medium-power bipolar transistor product line, engineered specifically for robust, thermally efficient switching and linear regulation in automotive and industrial environments.

FAQ

What is the maximum allowable junction temperature for BCX51-16,115?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in Table 6 of the Nexperia datasheet Rev. 9. Operation beyond this limit risks permanent degradation of h_FE, V_CE(sat), and leakage currents. Derating curves in Figures 2 and 7 define safe power limits across ambient temperatures.

Is BCX51-16,115 suitable for automotive applications?

Yes - BCX51-16,115 is AEC-Q101 qualified per Section 8.1 of the datasheet, having passed stress tests for temperature cycling, humidity, mechanical shock, and ESD. It is approved for use in automotive powertrain, body, and chassis systems operating from −40 °C to +125 °C ambient.

How does the SOT89 package affect thermal performance compared to SOT223?

The SOT89 package achieves R_th(j-sp) = 16 K/W - identical to SOT223 - but has lower R_th(j-a) (250 K/W vs. 192 K/W on standard FR4) due to smaller copper area. With a 6 cm² collector pad, R_th(j-a) drops to 93 K/W, matching SOT223's best-case value, enabling equivalent power handling in space-constrained layouts.

What is the meaning of the "−16" suffix in BCX51-16,115?

The "−16" denotes the h_FE selection group: DC current gain of 100–250 measured at V_CE = −2 V and I_C = −150 mA. This bin ensures tighter gain distribution than the −10 group (63–160), reducing base drive variance in production assemblies.

BCX51-16,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

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:: 100 @ 150mA, 2V

Power - Max:: 1.3 W

Frequency - Transition:: 145MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCX51-16,115 FAQ

1.How can I place an order for BCX51-16,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX51-16,115 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 BCX51-16,115 reliable?

The price and inventory of BCX51-16,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX51-16,115 is usually 5 days.

3.What payment methods are accepted for BCX51-16,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX51-16,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX51-16,115?

BCX51-16,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX51-16,115 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 BCX51-16,115?

For technical support, including BCX51-16,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX51-16,115 requirements.

6.How does Aetrix verify that BCX51-16,115 is sourced from the original manufacturer or authorized distributors?

All BCX51-16,115 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 BCX51-16,115 meets industry standards.

7.What is the process for return or replacement of BCX51-16,115?

All BCX51-16,115 units undergo pre-shipment inspection (PSI). If there is an issue with BCX51-16,115, 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 BCX51-16,115 part is unused and in its original packaging.

Return procedure for BCX51-16,115:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…