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Nexperia USA Inc. BCX53TX
- Part No.:
- BCX53TX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX53TX.pdf
- Description:
- TRANS PNP 80V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:850
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Product details
Overview
BCX53TX from Nexperia is a PNP power bipolar transistor in SOT89 (SC-62) package, rated for −80 V VCEO, −1 A continuous collector current, and 1100 mW power dissipation with 6 cm² copper pad. It delivers hFE = 63–250 at VCE = −2 V / IC = −150 mA and supports automotive-grade linear voltage regulation and high-side switching.
For engineers reviewing the BCX53TX datasheet, BCX53TX pinout, BCX53TX application, or BCX53TX equivalent, this device is selected for robust PNP power switching where AEC-Q101 qualification, thermal stability up to 150 °C junction temperature, and defined saturation behavior under pulsed and DC loads are critical design requirements.
Technical Context
This PNP transistor operates in active, saturation, and cutoff regions with verified breakdown limits: V(BR)CEO = −80 V, V(BR)CBO = −100 V, and V(BR)EBO = −5 V. Its fT = 140 MHz at VCE = −5 V / IC = −50 mA enables moderate-frequency amplification and fast switching transitions.
Thermal performance is defined across three mounting conditions: Rth(j-a) = 250 K/W (standard footprint), 157 K/W (1 cm² collector pad), and 114 K/W (6 cm² pad). Transient thermal impedance curves confirm pulse handling capability up to 2 A peak with tp ≤ 1 ms and duty cycle ≤ 0.02.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −80 V - Maximum safe collector-emitter voltage with base open; defines high-side switch blocking capability |
| IC | −1 A - Continuous DC collector current rating; sets linear regulator or driver stage output capacity |
| hFE | 63–250 - DC current gain range at VCE = −2 V / IC = −150 mA; determines base drive sizing for saturation |
| VCE(sat) | −500 mV max at IC = −500 mA / IB = −50 mA; ensures low conduction loss in saturated switching |
| Ptot | 1100 mW - Max power dissipation with 6 cm² copper pad; enables thermally constrained PCB layouts |
| fT | 140 MHz - Transition frequency at VCE = −5 V / IC = −50 mA; supports audio and low-MHz signal amplification |
| AEC-Q101 | Qualified - Validated per Automotive Electronics Council stress test standard; suitable for automotive power modules |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, single-sided FR4 PCB mount with exposed collector tab for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter (E) | Current exit node; connected to higher potential rail in high-side configurations |
| 2 | Collector (C) | Main current sink; electrically and thermally tied to PCB copper pad for heat dissipation |
| 3 | Base (B) | Control input; requires current-limited drive to achieve specified hFE-based saturation |
Key Features
| Feature | Design Value |
|---|---|
| High collector current capability | −1 A continuous / −2 A pulsed enables direct drive of medium-power loads without external buffering |
| Three hFE selections | BCX53T (63–250), BCX53-10T (63–160), BCX53-16T (100–250) allow precise gain matching for feedback loop stability |
| High power dissipation | 1100 mW with 6 cm² pad supports operation in compact industrial enclosures without forced air cooling |
| AEC-Q101 qualification | Validated for automotive ambient temperature range (−55 °C to +150 °C) and humidity/temperature cycling |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
Use Scenario: Adjustable LDO pre-regulator stage delivering stable 5 V/1 A output from 12 V automotive supply. IC Role / Device Role / Timing Role: PNP pass transistor controlling output voltage via emitter-follower configuration with feedback to base. Use Value: Low VCE(sat) minimizes dropout voltage; AEC-Q101 rating ensures reliability across vehicle life cycles. |
Use Scenario: Level-shifting gate drive for N-channel high-side MOSFET in 24 V industrial motor control H-bridge. IC Role / Device Role / Timing Role: Active pull-down switch turning off MOSFET by discharging gate capacitance rapidly. Use Value: 2 A peak current capability handles Ciss discharge transients; 140 MHz fT ensures sub-microsecond turn-off. |
| High-Side Switches | Power Management |
Use Scenario: Load switch enabling/disabling 5 V rail to infotainment subsystem in automotive head unit. IC Role / Device Role / Timing Role: High-side series switch with base driven by microcontroller GPIO through current-limiting resistor. Use Value: −80 V VCEO provides margin against load-dump transients; thermal derating curve supports 100% duty-cycle operation. |
Use Scenario: Current-sense amplifier front-end in battery protection IC for 3S Li-ion pack. IC Role / Device Role / Timing Role: PNP configured as constant-current source biasing sense resistor and op-amp input stage. Use Value: Tight hFE spread (63–250) enables predictable current mirroring; low leakage (<100 nA IEBO) preserves accuracy at low currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCX53-16T | Higher minimum hFE (100 vs. 63); identical VCEO, IC, package, and AEC-Q101 status | Better suited for low-base-drive designs requiring guaranteed gain at light loads | Select when base drive current must be minimized and tighter hFE consistency is required |
| ZTX753 | Same SOT89 package but −100 V VCEO, −1.5 A IC, no AEC-Q101 qualification; hFE = 100–800 | Higher voltage/current headroom but unqualified for automotive use; wider hFE spread increases design uncertainty | Choose only for non-automotive industrial applications needing extended voltage margin and higher peak current |
Compared with BCX53TX, BCX53-16T offers higher guaranteed gain for reduced base drive, while ZTX753 trades automotive qualification for greater voltage and current headroom-neither is pin-compatible without layout revision due to differing marking and internal structure.
Availability
BCX53TX is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and high-side switches requiring stable component supply in automotive and industrial production environments.
Supply support for BCX53TX 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 efficient manufacturing.
The BCX53T series belongs to Nexperia's AEC-Q101-qualified PNP power transistor product line, engineered for robust linear regulation, switching, and driver functions in harsh-temperature automotive and industrial power systems.
FAQ
What is the maximum allowable junction temperature for BCX53TX?
The absolute maximum junction temperature (Tj) is 150 °C, validated per IEC 60134 limiting values. Operation above this threshold risks permanent degradation. Derated power dissipation must be calculated using Rth(j-a) = 114 K/W for 6 cm² copper pad, yielding ~950 mW at Tamb = 75 °C.
Does BCX53TX require a heatsink in typical applications?
No dedicated heatsink is required if mounted on FR4 PCB with ≥6 cm² copper area connected to the collector pad. Thermal resistance drops to 114 K/W under that condition, allowing full 1100 mW dissipation at 25 °C ambient. Smaller pads increase thermal resistance to 157 K/W (1 cm²) or 250 K/W (standard footprint), necessitating derating.
How does the BCX53TX compare to BCX56T in circuit design?
BCX56T is the NPN complement to BCX53TX, sharing identical SOT89 package, voltage/current ratings (80 V, 1 A), and AEC-Q101 qualification. Circuit substitution requires polarity reversal: BCX53TX sinks current from load to ground (high-side), while BCX56T sources current from supply (low-side), altering bias network topology and feedback paths.
Can BCX53TX be used in Class AB audio amplifier output stages?
Yes-its fT = 140 MHz, low VCE(sat), and hFE stability across −55 °C to +150 °C support mid-power audio output stages. However, its SOA is limited to 2 A/1 ms pulses; sustained >500 mA output requires careful thermal design and may need paralleling or heatsinking beyond standard PCB layout.
BCX53TX 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:
- 500 mW
- Frequency - Transition:
- 140MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX53TX FAQ
1.How can I place an order for BCX53TX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX53TX 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 BCX53TX reliable?
The price and inventory of BCX53TX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX53TX is usually 5 days.
3.What payment methods are accepted for BCX53TX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX53TX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX53TX?
BCX53TX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX53TX 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 BCX53TX?
For technical support, including BCX53TX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX53TX requirements.
6.How does Aetrix verify that BCX53TX is sourced from the original manufacturer or authorized distributors?
All BCX53TX 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 BCX53TX meets industry standards.
7.What is the process for return or replacement of BCX53TX?
All BCX53TX units undergo pre-shipment inspection (PSI). If there is an issue with BCX53TX, 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 BCX53TX part is unused and in its original packaging.
Return procedure for BCX53TX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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