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

Nexperia USA Inc. BCX53-10,135

Name: BCX53-10,135
Brand: Nexperia USA Inc.
SKU: BCX53-10,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCX53-10,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCX53-10,135.pdf

Description:: TRANS PNP 80V 1A SOT-89

Quantity:: RFQ Add To RFQ list

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Inventory:3,880

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Product details

Overview

BCX53-10,135 from Nexperia is a PNP medium power transistor in SOT89 package, rated for −80 V V_CEO, −1 A continuous collector current, and 1.35 W total power dissipation with 6 cm² copper pad. It delivers h_FE = 63–160 at −150 mA/−2 V and is AEC-Q101 qualified for automotive-grade reliability. It serves as a high-side switch or linear regulator pass element in battery-powered industrial control modules.

For engineers reviewing the BCX53-10,135 datasheet, BCX53-10,135 pinout, BCX53-10,135 application, or BCX53-10,135 equivalent, key selection criteria include verified thermal resistance (R_th(j-a) = 93 K/W with 6 cm² pad), pulsed current capability (−2 A, t_p ≤ 1 ms), saturation voltage (V_CEsat ≤ −0.5 V at −500 mA/−50 mA), and AEC-Q101 qualification status.

Technical Context

This PNP bipolar junction transistor operates in linear and switching modes with base-controlled current amplification. Its exposed collector tab enables direct thermal coupling to PCB copper, supporting stable operation up to T_j = 150 °C under defined mounting conditions.

The device features three h_FE bins (BCX53, BCX53-10, BCX53-16) for gain-matched designs. Its f_T = 145 MHz and C_c = 15 pF support moderate-frequency switching applications such as MOSFET gate driving and low-noise preamplification stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V - Maximum safe collector-emitter reverse bias before breakdown; enables use in 48 V automotive supply rails with margin.
I_C	−1 A continuous - Sustained load current capability; supports 12 V/1 A linear regulators or high-side switches.
h_FE	63–160 at −150 mA/−2 V - Confirmed DC current gain range for predictable base drive sizing in analog and switching circuits.
V_CEsat	≤ −0.5 V at −500 mA/−50 mA - Low saturation voltage minimizes conduction loss and self-heating in switching applications.
P_tot	1.35 W with 6 cm² copper pad - Achievable power handling under optimized PCB thermal design; derates to 0.50 W on standard footprint.
R_th(j-a)	93 K/W with 6 cm² pad - Thermal resistance directly determines junction temperature rise (ΔT = P × R_th) for reliability modeling.
f_T	145 MHz - Transition frequency confirms suitability for gate driving of power MOSFETs up to ~10 MHz switching frequencies.

Pinout & Package

SOT89 (SC-62) plastic surface-mount package with 3 leads, 1.5 mm pitch, and 4.5 mm × 2.5 mm × 1.5 mm body. Exposed collector tab provides thermal and electrical connection to PCB copper.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink node; connects to load return or ground reference in high-side configurations.
2	Collector	Main power terminal; electrically and thermally tied to PCB copper via exposed pad for heat dissipation.
3	Base	Control input; requires current-limited drive (I_B ≤ −0.3 A peak) to avoid damage during switching transients.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS power stages.
Exposed collector heatsink	Enables direct thermal path to PCB; reduces R_th(j-a) by 47% (from 250 to 93 K/W) with 6 cm² copper area.
Three h_FE bins	BCX53-10 offers mid-range gain (63–160), enabling consistent biasing without individual transistor trimming.
High peak current rating	I_CM = −2 A (t_p ≤ 1 ms) supports surge handling in motor startup or capacitor charging circuits.
Low V_BE	≤ −1 V at −500 mA ensures efficient base drive with minimal voltage overhead in low-voltage systems.

Applications

Linear Voltage Regulators

High-Side Switches

Use Scenario: Adjustable 5–24 V linear regulator delivering up to 1 A to microcontroller subsystems in automotive ECUs.

IC Role / Device Role / Timing Role: Pass transistor controlling output voltage via emitter-follower configuration with feedback loop.

Use Value: Low V_CEsat (≤ −0.5 V) limits dropout voltage and power loss; AEC-Q101 qualification ensures functional safety compliance.

Use Scenario: 12 V battery-fed high-side power switch for solenoid drivers in HVAC actuators.

IC Role / Device Role / Timing Role: PNP switch enabling load connection to battery positive rail when base is pulled low.

Use Value: −80 V V_CEO withstands load dump transients; exposed collector pad maintains T_j < 125 °C at full 1 A load.

Battery-Driven Devices

MOSFET Drivers

Use Scenario: Power enable circuit for portable test equipment powered by Li-ion packs (8.4–12.6 V).

IC Role / Device Role / Timing Role: Reverse-polarity protection and soft-start switch controlling main power rail sequencing.

Use Value: I_CM = −2 A handles inrush current during hot-plug events; −5 V V_EBO rating prevents emitter-base breakdown during undervoltage faults.

Use Scenario: Level-shifting driver stage for N-channel high-side MOSFETs in buck converters.

IC Role / Device Role / Timing Role: Fast-switching PNP transistor pulling gate low while isolating logic-level control from power domain.

Use Value: f_T = 145 MHz ensures <100 ns turn-off delay; C_c = 15 pF minimizes Miller effect during transitions.

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
BCP53-10,115	SOT223 package; same V_CEO/I_C/h_FE specs but higher R_th(j-a) (125 K/W typical on FR4)	Less effective thermal performance in space-constrained layouts; requires larger copper area for equivalent power handling	Select when board layout favors SOT223 footprint or existing thermal pads align with that outline
ZTX753	TO-92 package; −100 V V_CEO, −1 A I_C, h_FE = 100–300, but no AEC-Q101 qualification	Not suitable for automotive production; limited to industrial or consumer applications where qualification is not required	Select only for non-automotive prototypes or cost-sensitive non-qualified designs requiring higher gain spread

Compared with BCX53-10,135, BCP53-10,115 trades thermal efficiency for different mechanical fit, while ZTX753 offers higher voltage and gain but lacks automotive qualification-making BCX53-10,135 the sole choice where AEC-Q101 compliance and SOT89 thermal performance are mandatory.

Availability

BCX53-10,135 is available at Aetrix Electronics and suitable for linear voltage regulators, high-side switches, and battery-driven devices requiring stable component supply across automotive, industrial, and embedded power management programs.

Supply support for BCX53-10,135 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 system functionality, delivering high-performance, reliable discrete, logic, and MOSFET solutions.

The BCX53 series belongs to Nexperia's automotive-qualified bipolar transistor product line, engineered specifically for robustness in power switching and regulation roles within harsh-environment electronic control units.

FAQ

What is the maximum allowable junction temperature for BCX53-10,135?

The absolute maximum junction temperature is 150 °C, as specified in the limiting values table. Operation above this threshold risks permanent degradation. Derating curves in Figure 1 confirm that full 1.35 W power dissipation is only valid with a 6 cm² collector pad at T_amb ≤ 25 °C; at 100 °C ambient, usable power drops to approximately 0.6 W.

Is BCX53-10,135 suitable for switching 24 V inductive loads?

Yes-its −80 V V_CEO provides 3.3× margin over 24 V supply, and its −2 A I_CM rating handles typical inductive kickback spikes. For sustained 1 A switching, ensure base drive delivers ≥ −100 mA (assuming h_FE min = 100) and PCB thermal design maintains T_j < 135 °C per reliability guidelines.

How does the SOT89 package's exposed collector affect PCB layout?

The exposed collector must be soldered to a dedicated copper pour (minimum 6 cm² recommended) to achieve the 93 K/W R_th(j-a). Avoid splitting the pad or routing traces underneath it. Use thermal vias beneath the pad if internal layers are used for additional heat spreading, and follow Nexperia's reflow footprint (Figure 10) for optimal solder joint integrity.

Does BCX53-10,135 require external base protection resistors?

Yes-its maximum rated base current is −0.3 A (DC) and −0.3 A (peak). In switching applications, a series base resistor must limit I_B to ≤ −0.25 A under worst-case drive conditions. For example, driving from a 3.3 V GPIO with V_BE ≈ −1 V requires R_B ≥ 9.2 Ω to stay within limit at 250 mA base current.

BCX53-10,135 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):: 80 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:: 1.3 W

Frequency - Transition:: 145MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCX53-10,135 FAQ

1.How can I place an order for BCX53-10,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCX53-10,135 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 BCX53-10,135 reliable?

The price and inventory of BCX53-10,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX53-10,135 is usually 5 days.

3.What payment methods are accepted for BCX53-10,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX53-10,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCX53-10,135?

BCX53-10,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCX53-10,135 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 BCX53-10,135?

For technical support, including BCX53-10,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX53-10,135 requirements.

6.How does Aetrix verify that BCX53-10,135 is sourced from the original manufacturer or authorized distributors?

All BCX53-10,135 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 BCX53-10,135 meets industry standards.

7.What is the process for return or replacement of BCX53-10,135?

All BCX53-10,135 units undergo pre-shipment inspection (PSI). If there is an issue with BCX53-10,135, 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 BCX53-10,135 part is unused and in its original packaging.

Return procedure for BCX53-10,135:

1.Submit a request within 90 days.

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

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