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onsemi BCP53
- Part No.:
- BCP53
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
BCP53.pdf
- Description:
- TRANS PNP 80V 1.2A SOT-223-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,261
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Product details
Overview
BCP53 from onsemi is a PNP silicon epitaxial transistor in SOT-223 package, rated for -80 VCEO, -100 VCBO, 1.5 A continuous collector current, and 1.5 W power dissipation at TA = 25°C; designed for medium-power audio amplifier stages and switching applications requiring robust saturation performance.
For engineers reviewing the BCP53 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal resistance (RθJA = 83.3°C/W), DC current gain range (hFE = 25–250), saturation voltage (VCE(sat) ≤ -0.5 V), and SOT-223 mechanical interface details to support layout, thermal design, and functional replacement decisions.
Technical Context
The BCP53 operates as a medium-power PNP bipolar junction transistor with fixed-emitter configuration, optimized for linear amplification and saturated switching in low-to-medium frequency circuits. Its hFE varies by variant (BCP53: min 25, BCP53-10: min 40, BCP53-16: min 63) and remains stable across -55°C to +150°C operating range.
It features low VCE(sat) (-0.5 V max at IC = -500 mA, IB = -50 mA) and moderate fT (50 MHz typical), confirming suitability for audio-frequency amplification and DC/low-frequency switching-not RF or high-speed digital logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -80 V - Maximum safe collector-emitter reverse bias before breakdown; defines usable voltage swing in PNP common-emitter amplifier stages. |
| IC | 1.5 A - Continuous DC collector current rating; supports medium-power output stages without forced cooling under derated conditions. |
| PD | 1.5 W @ TA = 25°C - Power dissipation limit on standard PCB; requires thermal pad area ≥0.93 in² for full rating. |
| hFE | 25–250 - DC current gain range across variants and operating points; enables predictable base drive sizing for switching or linear bias networks. |
| RθJA | 83.3°C/W - Junction-to-ambient thermal resistance (surface mounted); implies ~125°C junction rise at full 1.5 W dissipation on reference board. |
| fT | 50 MHz typical - Transition frequency at IC = -10 mA, VCE = -5 V; confirms usability up to mid-audio frequencies but not RF. |
Pinout & Package
The BCP53 is housed in the SOT-223 (TO-261) surface-mount package with four terminals: pins 1 (Base), 2 and 4 (Collector, internally connected), and 3 (Emitter). The dual-collector configuration enhances thermal conduction and current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input for bipolar conduction; requires negative base current relative to emitter to turn on PNP device. |
| 2 & 4 | Collector | Internally tied collector terminals; both must be connected to high-side supply rail or load return path for optimal thermal and current sharing. |
| 3 | Emitter | Common reference terminal; typically connected to circuit ground or positive rail depending on topology (e.g., emitter-follower or common-emitter). |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | 1.5 A IC rating enables use in speaker drivers, relay drivers, and power stage switches without external heat sinking on moderate PCBs. |
| SOT-223 thermal robustness | Formed leads absorb soldering thermal stress; large copper tab improves heat transfer-validated for wave and reflow processes per JEDEC J-STD-020. |
| Low saturation voltage | VCE(sat) ≤ -0.5 V at IC/IB = 10 ensures minimal conduction loss and efficient switching in battery-powered or thermally constrained systems. |
| Wide temperature operation | -65°C to +150°C operating range supports automotive under-hood, industrial control, and outdoor equipment deployments. |
Applications
| Audio Power Amplifier Output Stage | DC Motor Driver Half-Bridge |
|---|---|
|
Use Scenario: Final push-pull output stage in Class AB audio amplifiers delivering up to 5 W into 8 Ω loads. IC Role / Device Role / Timing Role: PNP complement in quasi-complementary output pair; provides negative half-cycle current sourcing. Use Value: Low VCE(sat) minimizes crossover distortion and thermal load; hFE stability across temperature ensures consistent bias point tracking. |
Use Scenario: High-side switch in brushed DC motor H-bridge or single-direction driver controlling 12 V/1 A fans or actuators. IC Role / Device Role / Timing Role: Medium-power PNP switch turning on motor supply rail; driven by NPN level shifter or microcontroller via base resistor network. Use Value: 1.5 A rating handles motor stall current; SOT-223 footprint allows compact layout with integrated thermal relief on PCB. |
| Linear Voltage Regulator Pass Element | Power Supply Sequencing Switch |
|
Use Scenario: Series pass transistor in adjustable 3–24 V linear regulators powering analog sensor subsystems or FPGA core rails. IC Role / Device Role / Timing Role: PNP pass element controlled by error amplifier; emitter referenced to output, collector to unregulated input. Use Value: -80 VCEO supports wide input range; RθJA = 83.3°C/W enables regulation up to ~1.2 W dissipation without heatsink. |
Use Scenario: Controlled power-up sequencing of multiple voltage domains (e.g., 5 V → 3.3 V → 1.8 V) in embedded controllers or communication modules. IC Role / Device Role / Timing Role: Delayed-enable PNP switch isolating downstream rails until upstream supply stabilizes. Use Value: Predictable hFE and low VBE(on) (-1.0 V max) simplify RC-based timing networks; Pb-free variants support RoHS-compliant production. |
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 |
|---|---|---|---|
| BCP53-16T1 | Higher hFE (min 63 vs. 25), same VCEO/IC/package; tighter DC gain binning for improved matching in differential pairs. | Better suited for precision current mirrors or low-base-drive linear amplifiers where gain consistency matters. | Select BCP53-16T1 when hFE > 60 is required at IC = -150 mA; otherwise BCP53 offers cost-effective general-purpose performance. |
| MJD2955G | TO-220 package, higher PD (15 W), same -80 VCEO; lower fT (~3 MHz), larger footprint, requires heatsink for >2 A operation. | Used in higher-power linear regulators or industrial motor controls where thermal mass and ruggedness outweigh size constraints. | Choose MJD2955G only when >1.5 W dissipation or mechanical robustness is mandatory; BCP53 remains optimal for space-constrained SMT designs. |
Compared with BCP53-16T1 and MJD2955G, the BCP53 balances gain flexibility, SMT compatibility, and thermal efficiency for mid-range power applications-offering the smallest footprint and lowest assembly cost while maintaining sufficient gain and voltage margin for most audio and control tasks.
Availability
BCP53 is available at Aetrix Electronics and suitable for audio amplifier output stages, DC motor drivers, linear voltage regulator pass elements, and power supply sequencing circuits requiring stable component supply, RoHS compliance, and SOT-223 surface-mount compatibility.
Supply support for BCP53 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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BCP53 belongs to onsemi's medium-power bipolar transistor product line, engineered specifically for reliable, cost-effective amplification and switching in audio, power management, and control applications where SMT integration and thermal performance are critical.
FAQ
What is the maximum collector-emitter voltage rating for the BCP53?
The BCP53 has a maximum collector-emitter voltage rating (VCEO) of -80 Vdc. This rating applies at TC = 25°C with IB = 0 and defines the highest reverse-biased voltage the transistor can withstand between collector and emitter before breakdown. Exceeding this value risks permanent damage, and derating is required at elevated temperatures per the datasheet thermal curves.
Does the BCP53 have a Pb-free version, and how is it marked?
Yes, the BCP53T1G and BCP53-16T1G are Pb-free versions of the BCP53, compliant with RoHS Directive 2011/65/EU. These variants carry the "G" suffix in the ordering code and are marked "AH" (for BCP53T1G) or "AH-16" (for BCP53-16T1G) on the SOT-223 package body. Lead finish is matte tin, and all packaging meets JEDEC J-STD-020 moisture sensitivity level 1.
What is the thermal resistance junction-to-ambient for the BCP53 in standard mounting?
The BCP53 has a thermal resistance junction-to-ambient (RθJA) of 83.3°C/W when mounted on a glass-epoxy PCB (1.575 in × 1.575 in × 0.059 in) with a minimum 0.93 in² copper pad for the collector lead. This value assumes natural convection and no additional heatsinking; actual RθJA improves with larger copper areas or forced airflow.
How does the BCP53 differ from its variants BCP53-10 and BCP53-16?
The BCP53, BCP53-10, and BCP53-16 share identical absolute maximum ratings and package, but differ in DC current gain (hFE) binning: BCP53 (min 25), BCP53-10 (min 40), and BCP53-16 (min 63) at IC = -5.0 mA and VCE = -2.0 V. These variants allow designers to select gain tolerance based on circuit sensitivity-e.g., BCP53-16 for low-base-drive amplifiers, BCP53 for general-purpose switching.
Can the BCP53 replace an NPN transistor like the BCP56 in the same circuit?
No-the BCP53 is a PNP transistor and cannot directly replace the NPN BCP56 due to opposite polarity, complementary biasing requirements, and reversed current flow direction. While they are complementary pairs intended for push-pull topologies, substituting one for the other without circuit redesign will prevent proper operation or cause damage. Always verify signal polarity, supply referencing, and drive logic when interchanging PNP/NPN devices like BCP53 and BCP56.
BCP53 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1.2 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:
- 40 @ 150mA, 2V
- Power - Max:
- 1.5 W
- Frequency - Transition:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-4
BCP53 FAQ
1.How can I place an order for BCP53 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCP53 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 reliable?
The price and inventory of BCP53 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP53 is usually 5 days.
3.What payment methods are accepted for BCP53?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP53 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCP53?
BCP53 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCP53 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?
For technical support, including BCP53 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP53 requirements.
6.How does Aetrix verify that BCP53 is sourced from the original manufacturer or authorized distributors?
All BCP53 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 meets industry standards.
7.What is the process for return or replacement of BCP53?
All BCP53 units undergo pre-shipment inspection (PSI). If there is an issue with BCP53, 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 part is unused and in its original packaging.
Return procedure for BCP53:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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