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

STMicroelectronics BCP53-16

Name: BCP53-16
Brand: STMicroelectronics
SKU: BCP53-16
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCP53-16

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

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

Datasheet:: BCP53-16.pdf

Description:: TRANS PNP 80V 1A SOT-223

Quantity:: RFQ Add To RFQ list

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Inventory:10,503

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Product details

Overview

BCP53-16 from STMicroelectronics is a silicon epitaxial planar PNP medium-voltage transistor in SOT-223 package, rated for V_CEO = −80 V, I_C = −1 A, P_tot = 1.6 W, and h_FE = 40–250 (at I_C = −5 mA to −500 mA), used as a medium-voltage load switch and output stage transistor in automotive post-voltage regulation and audio amplifier circuits.

For engineers reviewing the BCP53-16 datasheet, BCP53-16 pinout, BCP53-16 application, or BCP53-16 equivalent, key selection criteria include guaranteed h_FE range at multiple collector currents, V_CE(sat) ≤ −0.5 V at I_C = −500 mA/I_B = −50 mA, f_T = 50 MHz, thermal resistance R_thj-amb = 78 °C/W on 1 cm² PCB, and complementary pairing with BCP56-16.

Technical Context

This PNP bipolar junction transistor operates in linear or switching mode with base-controlled current amplification. Its breakdown ratings-V_CBO = −100 V, V_CEO = −80 V, and V_CER = −100 V with 1 kΩ base-emitter resistor-support robust medium-voltage switching in regulated power rails.

DC current gain h_FE is specified across three operating points (I_C = −5 mA, −150 mA, −500 mA), enabling predictable gain behavior in both small-signal amplification and saturated switching. Transition frequency f_T = 50 MHz at I_C = −10 mA confirms suitability for audio-frequency and fast-switching applications up to several megahertz.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−80 V: Maximum safe collector-emitter voltage under open-base condition, defining upper limit for load switching in 24 V/48 V automotive systems.
I_C	−1 A continuous: Rated collector current enables direct drive of medium-power loads such as relays, LED arrays, or pre-driver stages.
P_tot	1.6 W at T_amb = 25 °C: Power dissipation capability with standard PCB mounting (1 cm² copper area), supporting thermally constrained surface-mount designs.
h_FE	40–250: DC current gain range across I_C = −5 mA to −500 mA, ensuring stable biasing and predictable saturation in both linear and switching configurations.
V_CE(sat)	≤ −0.5 V at I_C = −500 mA / I_B = −50 mA: Low saturation voltage minimizes conduction loss and self-heating during high-current switching.
f_T	50 MHz: Transition frequency confirms usable bandwidth for audio amplification and fast digital signal switching up to ~5–10 MHz.

Pinout & Package

SOT-223 plastic surface-mount package with integrated heat sink tab (pin 2), optimized for thermal performance on PCBs with ≥1 cm² copper area. Standard 3-pin configuration: emitter, base, collector, with pin 2 electrically connected to collector and thermally coupled to heatsink pad.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit terminal; referenced to ground or negative rail in PNP high-side switch configurations.
2	Collector (and thermal tab)	Main current input; electrically and thermally tied to exposed metal tab for enhanced heat dissipation into PCB copper.
3	Base	Control input; requires current-limited drive (max I_B = −0.1 A) to ensure reliable saturation without overdrive.

Key Features

Feature	Design Value
Medium-voltage PNP switching	V_CEO = −80 V supports operation in 24 V/48 V automotive and industrial supply rails with margin.
Complementary pairing	Matched gain and rating with NPN BCP56-16 enables balanced push-pull and H-bridge driver designs.
High f_T for audio use	50 MHz transition frequency ensures low distortion and stable gain in Class-A/B audio output stages.
Thermally enhanced SOT-223	R_thj-amb = 78 °C/W on 1 cm² PCB allows >1 W dissipation without external heatsink in space-constrained layouts.

Applications

Automotive Post-Voltage Regulation

Audio Amplifier Output Stage

Use Scenario: Regulating downstream 5 V or 3.3 V supplies after main DC-DC converter in vehicle infotainment or body control modules.

IC Role / Device Role / Timing Role: PNP pass transistor controlling current flow from higher intermediate rail (e.g., 12 V) to regulated output, operating in linear mode.

Use Value: V_CEO = −80 V and h_FE stability across temperature enable precise dropout control and thermal reliability under load transients.

Use Scenario: Driving speaker loads in Class-B or Class-AB audio output stages of car radios and cabin amplifiers.

IC Role / Device Role / Timing Role: Complementary PNP output device paired with NPN BCP56-16 in push-pull configuration to deliver bidirectional current to speaker.

Use Value: f_T = 50 MHz and low V_CE(sat) reduce crossover distortion and conduction loss, improving audio fidelity and efficiency.

Medium-Voltage Load Switch

Industrial Relay Driver

Use Scenario: Enabling/disabling 24 V solenoids, valves, or sensors in factory automation and building management systems.

IC Role / Device Role / Timing Role: High-side PNP switch controlled by microcontroller GPIO via base resistor network.

Use Value: I_C = −1 A rating and robust V_CBO = −100 V withstand inductive kickback without snubber diodes in many cases.

Use Scenario: Driving coil current for 24 V DC relays in PLC I/O modules and motor control panels.

IC Role / Device Role / Timing Role: Saturated-switching transistor providing full coil current while minimizing power loss and self-heating.

Use Value: V_CE(sat) ≤ −0.5 V at I_C = −500 mA reduces relay coil power dissipation and improves system thermal margin.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCP53-10	Lower h_FE range (25–160) and same V_CEO/I_C ratings.	Suitable where lower gain suffices and tighter h_FE tolerance is acceptable.	Select when bias network design accommodates reduced minimum gain and cost sensitivity outweighs gain headroom.
MJD2955T4G	TO-220 package, higher P_tot = 15 W, V_CEO = −60 V, h_FE = 20–70 at I_C = −4 A.	Requires heatsink; suited for higher-current, lower-frequency power switching-not surface-mount audio or compact regulation.	Choose only when >1 A continuous current or forced-air cooling is required; not drop-in compatible due to package and gain profile.

Compared with BCP53-10, the BCP53-16 offers higher guaranteed h_FE for more stable biasing in precision linear regulators; versus MJD2955T4G, it trades raw power handling for SMT compatibility, thermal efficiency on PCB, and audio-grade f_T.

Availability

BCP53-16 is available at Aetrix Electronics and suitable for automotive post-regulation, audio amplifier output stages, medium-voltage load switching, and industrial relay driving requiring stable component supply across production lifecycles.

Supply support for BCP53-16 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for automotive, industrial, and consumer markets.

The BCP53 series belongs to ST's general-purpose bipolar transistor product line, engineered specifically for medium-voltage linear regulation and audio-frequency switching in space- and thermal-constrained surface-mount applications.

FAQ

Is BCP53-16 suitable for linear regulator pass transistor applications?

Yes. With V_CEO = −80 V, h_FE = 40–250, and P_tot = 1.6 W on standard PCB layout, it supports adjustable linear regulators delivering up to ~500 mA at 5–12 V output from 24 V input rails. Thermal derating must be applied above 25 °C ambient per R_thj-amb = 78 °C/W.

What is the recommended base drive for saturation switching?

For reliable saturation at I_C = −500 mA, apply I_B = −50 mA (h_FE ≥ 10), using a series base resistor calculated from microcontroller output voltage and V_BE(on) ≈ −1 V. Avoid exceeding I_B = −0.1 A peak to prevent base damage per absolute maximum ratings.

Can BCP53-16 be used in push-pull audio output stages with BCP56-16?

Yes. The BCP53-16 (PNP) and BCP56-16 (NPN) are explicitly designated as complementary types with matched voltage ratings, gain ranges, and thermal characteristics. Their SOT-223 footprints allow symmetrical PCB layout and thermal coupling in Class-AB amplifier output stages.

Does the SOT-223 package require special PCB layout considerations?

Yes. Pin 2 (collector/thermal tab) must be soldered to ≥1 cm² of copper pour for thermal performance. Use thermal vias under the tab if internal layers are available. Keep traces short and wide for collector/emitter paths, and avoid routing sensitive signals near the tab to minimize coupling from switching noise.

BCP53-16 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

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):: 80 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:: 1.6 W

Frequency - Transition:: 50MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-223

BCP53-16 FAQ

1.How can I place an order for BCP53-16 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCP53-16 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 BCP53-16 reliable?

The price and inventory of BCP53-16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP53-16 is usually 5 days.

3.What payment methods are accepted for BCP53-16?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP53-16 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCP53-16?

BCP53-16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCP53-16 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 BCP53-16?

For technical support, including BCP53-16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP53-16 requirements.

6.How does Aetrix verify that BCP53-16 is sourced from the original manufacturer or authorized distributors?

All BCP53-16 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 BCP53-16 meets industry standards.

7.What is the process for return or replacement of BCP53-16?

All BCP53-16 units undergo pre-shipment inspection (PSI). If there is an issue with BCP53-16, 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 BCP53-16 part is unused and in its original packaging.

Return procedure for BCP53-16:

1.Submit a request within 90 days.

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

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