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Nexperia USA Inc. BCX54-16-QX
- Part No.:
- BCX54-16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX54-16-QX.pdf
- Description:
- TRANS NPN 45V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:3,926
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Product details
Overview
BCX54-16-QX from Nexperia is a 45 V, 1 A NPN medium power transistor in SOT89 (SC-62) package, optimized for linear voltage regulation, MOSFET gate driving, and low-side switching in automotive-grade power management circuits. It delivers hFE = 100–250 at VCE = 2 V / IC = 150 mA, supports 2 A peak collector current, and is qualified to AEC-Q101.
For engineers reviewing the BCX54-16-QX datasheet, BCX54-16-QX pinout, BCX54-16-QX application, or BCX54-16-QX equivalent, key selection criteria include its 45 V VCEO, thermal resistance of 93 K/W (with 6 cm² collector pad), AEC-Q101 qualification, and SOT89 package suitability for thermally demanding PCB layouts.
Technical Context
This NPN bipolar junction transistor operates as a single-stage amplifying or switching element with fixed emitter-base and collector-emitter junctions. Its design emphasizes stable DC current gain across temperature (−55 °C to 150 °C) and robust pulsed operation (tp ≤ 300 μs, duty cycle ≤ 0.02).
The device uses an exposed die pad in the SOT89 package to enhance thermal conduction, enabling 1.35 W total power dissipation when mounted on FR4 with a 6 cm² copper pad. Junction-to-solder-point thermal resistance is 16 K/W, supporting reliable operation in automotive ambient conditions up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch or regulator applications. |
| IC | 1 A continuous - Rated DC collector current; supports sustained load switching in battery-powered systems and power management blocks. |
| hFE | 100–250 at VCE = 2 V, IC = 150 mA - Confirmed DC current gain range ensures predictable base drive requirements for saturation control. |
| Ptot | 1.35 W with 6 cm² collector pad - Achievable power handling enables use in thermally constrained automotive modules without forced cooling. |
| Rth(j-a) | 93 K/W - Thermal resistance from junction to ambient under optimized PCB layout; determines steady-state temperature rise under load. |
| fT | 100–180 MHz - Transition frequency confirms suitability for high-speed switching (e.g., PWM gate drivers) up to ~10 MHz practical bandwidth. |
| VCE(sat) | ≤ 0.5 V at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss in switching applications, improving efficiency. |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed die pad for enhanced thermal transfer; 3-pin flat-lead configuration measuring 4.6 mm × 2.6 mm × 1.8 mm (L × W × H), compliant with JEDEC MO-229 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Reference terminal for current flow; connected to ground or low-side return path in switching topologies. |
| 2 | Collector | Main current-carrying terminal; tied to load or supply rail; electrically and thermally coupled to exposed pad. |
| 3 | Base | Control input; requires current-limited drive (max IB = 0.3 A) to achieve full saturation or linear amplification. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power stages. |
| Three hFE bins (10–16–25) | BCX54-16-QX provides mid-range gain (100–250), balancing drive simplicity and noise immunity in feedback loops. |
| Exposed collector pad | Enables direct thermal coupling to PCB copper; reduces junction-to-ambient resistance by up to 40% vs. standard SOT89 footprint. |
| 2 A peak collector current | Supports short-duration surge loads (e.g., motor startup, capacitor charging) without secondary breakdown. |
| Low VBE (≤ 1 V at IC = 500 mA) | Reduces base drive power and simplifies level-shifting in microcontroller-driven switch interfaces. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
|
Use Scenario: Pass transistor in adjustable LDO or series regulator supplying 3.3 V/1 A to MCU subsystems in automotive infotainment units. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; operates in linear region with precise VBE tracking. Use Value: Stable 1 A output with <10 mV load regulation error due to tight hFE binning and low VCE(sat) drift over temperature. |
Use Scenario: High-current gate driver stage for 40 V N-channel MOSFETs in BLDC motor controllers. IC Role / Device Role / Timing Role: Current amplifier boosting microcontroller GPIO output to deliver ≥50 mA peak gate charge current. Use Value: Fast turn-on (driven by fT > 100 MHz) and low VCE(sat) minimize driver losses during PWM transitions. |
| Low-Side Switches | Battery-Driven Devices |
|
Use Scenario: Load switch for 12 V automotive accessories (e.g., HVAC fans, LED lighting) controlled by CAN/LIN nodes. IC Role / Device Role / Timing Role: Saturated NPN switch connecting load to ground; driven by open-drain logic or dedicated driver IC. Use Value: AEC-Q101 qualification ensures reliability under load dump transients; 45 V rating accommodates ISO 7637-2 pulse 5a (±100 V clamped). |
Use Scenario: Power path control in portable medical monitors powered by Li-ion batteries (3.0–4.2 V) with 500 mA peak load. IC Role / Device Role / Timing Role: Reverse-polarity protection and enable switch in battery input stage; operated in saturation with minimal dropout. Use Value: Low VCE(sat) (≤0.5 V) preserves battery runtime; SOT89 package allows compact layout with integrated thermal relief. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCX54-10-Q | hFE = 63–160 (lower mid-bin); otherwise identical VCEO, IC, package, and AEC-Q101 status. | Suitable where lower gain suffices (e.g., fixed-gain amplifiers), reducing sensitivity to base drive variation. | Select when tighter hFE tolerance is unnecessary and cost optimization is prioritized. |
| BCX54-25-Q | hFE = 160–250 (high-bin); same electrical ratings and thermal performance as BCX54-16-QX. | Preferred for low-base-current designs (e.g., high-impedance microcontroller outputs) requiring maximum gain margin. | Choose when minimizing base drive power or extending linear operating range is critical. |
Compared with BCX54-10-Q and BCX54-25-Q, the BCX54-16-QX offers balanced hFE for predictable base drive sizing without overdesign, making it optimal for production-stable automotive power stages where gain consistency and thermal robustness are jointly prioritized.
Availability
BCX54-16-QX is available at Aetrix Electronics and suitable for automotive power management, industrial motor control, and battery-operated medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BCX54-16-QX 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 efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The BCX54-Q series belongs to Nexperia's AEC-Q101-qualified discrete power transistor portfolio, engineered specifically for thermally demanding, safety-conscious automotive power switching and regulation functions.
FAQ
What is the maximum allowable junction temperature for BCX54-16-QX?
The absolute maximum junction temperature is 150 °C, as specified in the Limiting Values table. Operation above this threshold risks permanent degradation of hFE and increased leakage. Derating curves confirm safe operation up to 125 °C ambient with appropriate PCB copper area.
Is BCX54-16-QX suitable for switching inductive loads like relays or solenoids?
Yes - its 45 V VCEO rating and 2 A ICM support flyback energy absorption when used with external clamp diodes. The device's rugged construction and AEC-Q101 qualification ensure reliability under repetitive inductive switching stress in automotive environments.
How does the SOT89 package's exposed pad affect PCB layout requirements?
The exposed collector pad must be soldered to a minimum 6 cm² copper area on the PCB's top layer for rated 1.35 W dissipation. Thermal vias to inner/ground planes are recommended but not required; solder mask opening over the pad is mandatory per Nexperia's reflow footprint (Fig. 10).
Can BCX54-16-QX replace BCX54-16 in non-automotive designs?
Yes - BCX54-16-QX is functionally identical to BCX54-16 but adds AEC-Q101 qualification and tighter process controls. It meets all electrical and thermal specs of the industrial-grade BCX54-16 while offering enhanced reliability for mission-critical applications.
BCX54-16-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- 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:
- 500 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BCX54-16-QX FAQ
1.How can I place an order for BCX54-16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX54-16-QX 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 BCX54-16-QX reliable?
The price and inventory of BCX54-16-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX54-16-QX is usually 5 days.
3.What payment methods are accepted for BCX54-16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX54-16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX54-16-QX?
BCX54-16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX54-16-QX 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 BCX54-16-QX?
For technical support, including BCX54-16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX54-16-QX requirements.
6.How does Aetrix verify that BCX54-16-QX is sourced from the original manufacturer or authorized distributors?
All BCX54-16-QX 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 BCX54-16-QX meets industry standards.
7.What is the process for return or replacement of BCX54-16-QX?
All BCX54-16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCX54-16-QX, 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 BCX54-16-QX part is unused and in its original packaging.
Return procedure for BCX54-16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCX54-16-QX Tags
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