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Nexperia USA Inc. BCX51-16,135
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- Part No.:
- BCX51-16,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX51-16,135.pdf
- Description:
- TRANS PNP 45V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:393
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Product details
Overview
BCX51-16,135 from Nexperia is a PNP medium power transistor in SOT89 surface-mount package, rated for −45 V VCEO, −1 A continuous collector current, and 0.50 W power dissipation on standard FR4 PCB. It features hFE of 100–250 at VCE = −2 V and IC = −150 mA, AEC-Q101 qualification, and optimized thermal performance via exposed collector pad-used in linear voltage regulators and high-side switches for automotive body control modules.
For engineers reviewing the BCX51-16,135 datasheet, BCX51-16,135 pinout, BCX51-16,135 application, or BCX51-16,135 equivalent, this page delivers verified electrical specs, validated SOT89 pin configuration, real-world use cases in power management and MOSFET driver stages, and confirmed automotive-grade alternatives with documented hFE and thermal resistance differences.
Technical Context
This device operates as a medium-power PNP bipolar junction transistor with fixed emitter-base and collector-emitter junctions, designed for DC linear amplification and switching in low-to-medium frequency (<145 MHz fT) applications. Its SOT89 package integrates a thermally enhanced collector pad directly soldered to PCB copper for efficient heat transfer.
The BCX51-16 variant is specifically binned for hFE = 100–250 at −2 V VCE and −150 mA IC, enabling precise current gain matching in feedback loops of linear regulators and gate drive circuits where stable β is critical for loop stability and output accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-emitter voltage under open-base condition; defines breakdown margin in high-side switch configurations. |
| IC | −1 A - Continuous DC collector current rating; supports load currents up to 1 A in linear regulator pass elements. |
| hFE (−16) | 100–250 - Guaranteed DC current gain range at −2 V VCE, −150 mA IC; enables predictable base drive sizing in amplifier and switch designs. |
| Ptot (std FR4) | 0.50 W - Total power dissipation on single-layer FR4 with standard footprint; sets thermal design baseline for board-level heatsinking. |
| Rth(j-a) | 250 K/W - Junction-to-ambient thermal resistance on standard FR4; informs temperature rise estimation (ΔT = P × Rth) during operation. |
| VCE(sat) | −0.5 V max at −500 mA IC, −50 mA IB - Low saturation voltage minimizes conduction loss in high-side switching applications. |
| fT | 145 MHz - Transition frequency at −5 V VCE, −50 mA IC; confirms suitability for audio-frequency and low-speed digital switching. |
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 2.6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Current sink terminal; connected to load ground or reference node in high-side switch topology. |
| 2 | Collector | Main power path terminal; electrically and thermally coupled to PCB copper pour for heat dissipation and low-inductance return. |
| 3 | Base | Control input; requires current-limited drive (max −0.3 A IB) to avoid overdrive and ensure reliable switching. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Three hFE selections | −10 (63–160), −16 (100–250), and unmarked (63–250) variants enable precise gain matching across production batches. |
| Exposed collector pad | Direct thermal interface to PCB reduces Rth(j-sp) to 16 K/W, improving power handling by >30% vs. non-thermal packages. |
| High power dissipation | Up to 1.35 W with 6 cm² collector pad on FR4-supports compact linear regulator designs without external heatsinks. |
| Low VCE(sat) | ≤−0.5 V at IC/IB = 10 ensures <500 mW conduction loss at 1 A, critical for efficiency in battery-powered systems. |
Applications
| Linear Voltage Regulators | High-Side Switches |
|---|---|
Use Scenario: Adjustable 5 V/3.3 V linear regulator in automotive infotainment power supply. IC Role / Device Role / Timing Role: PNP pass transistor controlling output voltage via feedback loop; operates in active region for regulation. Use Value: Stable hFE binning (−16) ensures consistent loop gain and transient response across temperature (−55 °C to +150 °C). |
Use Scenario: Load switch for 12 V accessory rail in vehicle body control module. IC Role / Device Role / Timing Role: High-side PNP switch enabling/disabling power to solenoids or LEDs with grounded loads. Use Value: −45 V VCEO provides 2× margin over 12 V automotive system transients; exposed collector pad sustains 1 A continuous current. |
| Battery-Driven Devices | MOSFET Drivers |
Use Scenario: Power path controller in portable medical monitor with Li-ion battery input. IC Role / Device Role / Timing Role: Reverse-polarity protection and load disconnect switch in battery input stage. Use Value: −5 V VEBO rating prevents emitter-base breakdown during hot-swap events; AEC-Q101 ensures reliability in field-deployed units. |
Use Scenario: Level-shifting gate driver for N-channel MOSFET in buck converter primary side. IC Role / Device Role / Timing Role: PNP pull-up stage providing fast turn-off current to MOSFET gate during switching transitions. Use Value: 145 MHz fT supports clean 500 kHz switching; low VCE(sat) minimizes driver-stage conduction loss. |
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 | hFE = 63–160 (lower gain band); same SOT89 package and −45 V/−1 A ratings. | Preferred where lower β reduces loop gain sensitivity in feedback-regulated supplies. | Select when tighter hFE tolerance is needed for production consistency in analog control loops. |
| ZTX788B | Higher VCEO (−80 V); higher Ptot (1.0 W); TO-92 package (not SMD); hFE = 100–300. | Suitable for industrial 24 V systems requiring higher voltage margin but incompatible with SMT assembly. | Choose only if board layout allows through-hole mounting and system voltage exceeds 45 V. |
Compared with BCX51-16,135, the −10 variant offers reduced hFE spread for improved gain predictability, while ZTX788B trades SMT compatibility for higher voltage and power capability-neither is pin-compatible, requiring layout revision.
Availability
BCX51-16,135 is available at Aetrix Electronics and suitable for linear voltage regulators, high-side switches, and MOSFET drivers requiring stable component supply in automotive and industrial power management designs.
Supply support for BCX51-16,135 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BCX51 series belongs to Nexperia's AEC-Q101-qualified medium-power transistor product line, engineered for robust operation in automotive power management, battery protection, and industrial control systems.
FAQ
What is the maximum allowable base current for BCX51-16,135?
The absolute maximum DC base current is −0.3 A, and peak pulsed base current is also limited to −0.3 A for tp ≤ 1 ms. Exceeding this risks permanent degradation of hFE and increased VCE(sat). Designers must size base resistors to limit IB to ≤−50 mA for typical 1 A collector switching to maintain safe SOA operation.
Does BCX51-16,135 support reflow soldering only, or can it be wave soldered?
Reflow soldering is the only recommended method per Nexperia's official documentation. Wave soldering is not supported due to thermal stress risks on the SOT89 package and potential damage to the internal die attach. The device's thermal profile is validated for JEDEC J-STD-020-compliant reflow cycles only.
How does the SOT89 package's exposed collector pad affect PCB layout?
The exposed collector pad (Pin 2) must be connected to a dedicated copper pour ≥1 cm² on the top layer for optimal thermal performance. This pad serves both electrical connection and heat sinking-no thermal relief is permitted. Minimum solder mask clearance of 0.2 mm around the pad edge is required to ensure full wetting and mechanical integrity.
Is BCX51-16,135 suitable for switching 24 V loads in industrial equipment?
Yes-its −45 V VCEO provides 88% voltage margin above 24 V nominal systems, and AEC-Q101 qualification ensures robustness against vibration, thermal cycling, and ESD. However, designers must verify power dissipation (P = VCE × IC) remains within 0.50 W on standard FR4 or derate accordingly using published thermal curves.
BCX51-16,135 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):
- 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
BCX51-16,135 FAQ
1.How can I place an order for BCX51-16,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX51-16,135 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 BCX51-16,135 reliable?
The price and inventory of BCX51-16,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX51-16,135 is usually 5 days.
3.What payment methods are accepted for BCX51-16,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX51-16,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX51-16,135?
BCX51-16,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX51-16,135 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 BCX51-16,135?
For technical support, including BCX51-16,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX51-16,135 requirements.
6.How does Aetrix verify that BCX51-16,135 is sourced from the original manufacturer or authorized distributors?
All BCX51-16,135 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 BCX51-16,135 meets industry standards.
7.What is the process for return or replacement of BCX51-16,135?
All BCX51-16,135 units undergo pre-shipment inspection (PSI). If there is an issue with BCX51-16,135, 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 BCX51-16,135 part is unused and in its original packaging.
Return procedure for BCX51-16,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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