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Nexperia USA Inc. BCP54-QX
- Part No.:
- BCP54-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
BCP54-QX.pdf
- Description:
- TRANS NPN 45V 1A SOT-223
- Quantity:
- Payment:
- Shipping:
Inventory:6,336
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Product details
Overview
BCP54-Q from Nexperia is an AEC-Q101-qualified NPN medium power transistor in SOT223 (SC-73) package, rated for 45 V VCEO, 1 A continuous collector current, and 1.35 W power dissipation with 6 cm² heatsink pad. It delivers hFE = 63–250 at IC = 150 mA and supports linear voltage regulation and MOSFET gate driving in automotive power management systems.
For engineers reviewing the BCP54-Q datasheet, BCP54-Q pinout, BCP54-Q application, or BCP54-Q equivalent, this page provides verified pin functions, thermal derating curves, hFE binning options (BCP54-10-Q/BCP54-16-Q), junction-to-ambient thermal resistance values under three PCB mounting conditions, and validated automotive-grade alternatives.
Technical Context
This transistor operates as a low-side switch or linear pass element with VCEO = 45 V and VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA. Its fT = 100–180 MHz enables stable operation in switching regulators up to several hundred kHz.
Thermal performance is defined across three PCB configurations: Rth(j-a) = 195 K/W (standard footprint), 125 K/W (1 cm² collector pad), and 93 K/W (6 cm² collector pad). Junction temperature is limited to 150 °C, with storage range from –65 °C to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines breakdown margin in 12 V/24 V automotive rail applications. |
| IC | 1 A - Continuous DC collector current rating; supports load switching up to ~12 W at 12 V with adequate heatsinking. |
| hFE | 63–250 - DC current gain range at VCE = 2 V, IC = 150 mA; enables predictable base drive sizing for saturation control. |
| VCE(sat) | ≤ 0.5 V - Collector-emitter saturation voltage at IC = 500 mA / IB = 50 mA; limits conduction loss to ≤250 mW in saturated switching. |
| Ptot | 1.35 W - Max total power dissipation with 6 cm² copper pad; sets practical thermal limit for linear regulator pass devices. |
| fT | 100–180 MHz - Transition frequency at VCE = 5 V, IC = 50 mA; confirms suitability for high-speed switching in PWM drivers. |
| Rth(j-a) | 93 K/W - Junction-to-ambient thermal resistance with 6 cm² collector pad; allows ~14.5 °C/W effective rise per watt under full load. |
Pinout & Package
SOT223 (SC-73) surface-mount plastic package with 4 leads: pins 1 and 4 are internally connected to the collector tab for enhanced thermal and current handling; pin 2 is collector (secondary), pin 3 is emitter, and pin 1/4 serve as primary collector terminals with integrated heatsink capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Collector (C) | Primary collector terminal tied to internal metal tab; used for high-current path and thermal conduction to PCB copper. |
| 2 | Collector (C) | Secondary collector lead; provides redundancy and mechanical stability but shares same node as pin 1. |
| 3 | Emitter (E) | Emitter output node; connects to ground or low-side return path in switch configurations. |
| 4 | Collector (C) | Third collector connection; electrically identical to pins 1 and 2; maximizes solder joint reliability and thermal transfer. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood use per stress test standard; ensures reliability in temperature-cycled, vibration-prone environments. |
| Three hFE bins | BCP54-Q (63–250), BCP54-10-Q (63–160), BCP54-16-Q (100–250); enables precise base resistor selection without design iteration. |
| Enhanced thermal pad | SOT223 package includes extended collector tab area; achieves 1.35 W dissipation with 6 cm² PCB copper, exceeding standard SOT-23 limits by >5×. |
| Low VCE(sat) | ≤ 0.5 V at IC/IB = 10; reduces power loss in linear regulators and improves efficiency in battery-driven low-side switches. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
|
Use Scenario: Pass transistor in adjustable 5 V/3.3 V linear regulators for infotainment microcontrollers. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; operates in active region with constant VCE drop. Use Value: Delivers stable 1 A output with <0.5 V dropout at full load, minimizing heat generation versus higher-VCE(sat) alternatives. |
Use Scenario: Gate driver stage for 40 V N-channel MOSFETs in automotive body control modules. IC Role / Device Role / Timing Role: Low-side switch sourcing gate charge current; driven by MCU GPIO with resistor-limited base. Use Value: Supports 500 mA peak gate current with fast turn-on (fT ≥ 100 MHz), reducing MOSFET switching losses in 20–100 kHz PWM. |
| Low-Side Switches | Battery-Driven Devices |
|
Use Scenario: Load switch for 12 V cabin lighting or HVAC actuators in passenger vehicles. IC Role / Device Role / Timing Role: Saturated NPN switch connecting load to ground; controlled by PWM or digital signal. Use Value: Handles 1 A continuous current with VCE(sat) ≤ 0.5 V, limiting on-state power loss to ≤500 mW and enabling compact thermal design. |
Use Scenario: Power enable switch in portable diagnostic tools powered by 12 V lead-acid or LiFePO₄ batteries. IC Role / Device Role / Timing Role: Reverse-polarity and overcurrent-protected main power switch; placed between battery and system input. Use Value: Withstands 45 V transients and operates reliably from –40 °C to +125 °C ambient, meeting ISO 16750-2 pulse test requirements. |
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 |
|---|---|---|---|
| ZTX653 | VCEO = 60 V, IC = 1 A, hFE = 100–300, SOT89 package; higher voltage rating but lower thermal resistance (Rth(j-a) = 60 K/W). | Preferred where 60 V transient immunity is required (e.g., 48 V mild-hybrid systems); less suitable for space-constrained SOT223 footprints. | Select ZTX653 when operating voltage exceeds 45 V or when lower thermal resistance justifies larger SOT89 footprint. |
| BCP56-16-Q | VCEO = 60 V, same SOT223 package, hFE = 100–250, Ptot = 1.5 W; higher voltage and power rating with identical pinout. | Drop-in replacement where 60 V breakdown is needed; maintains compatibility with existing PCB layout and thermal design. | Choose BCP56-16-Q if upgrading from 45 V to 60 V system rails while retaining mechanical and thermal interface. |
Compared with ZTX653 and BCP56-16-Q, BCP54-Q offers optimal cost-performance balance for 12 V/24 V automotive subsystems requiring 45 V rating and SOT223 thermal scalability-without over-specifying voltage or sacrificing footprint compatibility.
Availability
BCP54-Q is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply in automotive production, industrial control, and battery-powered equipment.
Supply support for BCP54-Q 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, with leadership in logic, discrete, and MOSFET technologies serving automotive, industrial, and consumer markets.
The BCP54-Q belongs to Nexperia's AEC-Q101-qualified medium-power bipolar transistor family, engineered specifically for robust linear and switching operation in automotive power management and body electronics.
FAQ
What is the maximum allowable base current for continuous operation?
The absolute maximum DC base current is 0.3 A per datasheet Table 5. However, for reliable continuous operation with IC = 1 A, base current should be limited to ≤100 mA to maintain hFE linearity and avoid thermal runaway. Derating is required above 25 °C ambient per Figure 1 power curves.
Can BCP54-Q replace BCP54 in non-automotive designs?
Yes - BCP54-Q is functionally identical to BCP54 in electrical parameters and pinout, but adds AEC-Q101 qualification and tighter hFE binning control. It is fully backward-compatible and preferred for new automotive designs; no circuit redesign is needed for drop-in use in legacy industrial applications.
How does the dual-collector configuration affect PCB layout?
Pins 1 and 4 are internally shorted to the collector tab, so both must be connected to the same net - typically a large copper pour for thermal management. The footprint in Figure 10 specifies 6.15 mm × 3.85 mm solder lands with 1.2 mm spacing; misalignment or incomplete soldering of either pin degrades thermal performance and current capacity.
Is BCP54-Q suitable for Class AB audio amplifier output stages?
No - while its fT and hFE support moderate-frequency amplification, the device lacks specified SOA (Safe Operating Area) curves for linear analog use and is optimized for switching/regulated power applications. Audio output stages require SOA-rated transistors with guaranteed second-breakdown immunity, which BCP54-Q does not provide.
BCP54-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- 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:
- 63 @ 150mA, 2V
- Power - Max:
- 650 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223
BCP54-QX FAQ
1.How can I place an order for BCP54-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCP54-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 BCP54-QX reliable?
The price and inventory of BCP54-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP54-QX is usually 5 days.
3.What payment methods are accepted for BCP54-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP54-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCP54-QX?
BCP54-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCP54-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 BCP54-QX?
For technical support, including BCP54-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP54-QX requirements.
6.How does Aetrix verify that BCP54-QX is sourced from the original manufacturer or authorized distributors?
All BCP54-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 BCP54-QX meets industry standards.
7.What is the process for return or replacement of BCP54-QX?
All BCP54-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCP54-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 BCP54-QX part is unused and in its original packaging.
Return procedure for BCP54-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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