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Nexperia USA Inc. BCX54-10-QX
- Part No.:
- BCX54-10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-243AA
- Datasheet:
-
BCX54-10-QX.pdf
- Description:
- TRANS NPN 45V 1A SOT-89
- Quantity:
- Payment:
- Shipping:
Inventory:4,861
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Product details
Overview
BCX54-10-QX from Nexperia is a 45 V, 1 A NPN medium-power transistor in SOT89 (SC-62) package, optimized for automotive-grade linear voltage regulation, MOSFET gate driving, and low-side switching. It delivers hFE = 63–160 at IC = 150 mA, VCE = 2 V, supports 2 A peak pulsed current, and is qualified to AEC-Q101.
For engineers reviewing the BCX54-10-QX datasheet, BCX54-10-QX pinout, BCX54-10-QX application, or BCX54-10-QX equivalent, this page provides verified electrical parameters, thermal derating curves, SOT89 mounting pad layout guidance, and automotive-compliant selection criteria for power management and driver-stage design.
Technical Context
This NPN bipolar junction transistor operates as a medium-power amplifying or switching device with fixed-emitter configuration. Its 45 V VCEO rating and 1 A continuous collector current support robust operation in 12 V/24 V automotive power rails and industrial DC-DC pre-regulators.
The device features an exposed die pad in its SOT89 package for enhanced thermal transfer, enabling up to 1.35 W total power dissipation when mounted on 6 cm² copper area. Its fT = 100–180 MHz and Cc = 6 pF support stable high-frequency switching in gate-drive applications without oscillation risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage under open-base condition; defines usable headroom in 24 V automotive systems. |
| IC | 1 A continuous - Sustained collector current capability; enables direct drive of small solenoids or logic-level MOSFET gates. |
| hFE | 63–160 at VCE = 2 V, IC = 150 mA - Confirmed DC current gain range for predictable base drive sizing in linear regulators. |
| Ptot | 1.35 W with 6 cm² copper pad - Real-world thermal limit defining PCB layout requirements for sustained 1 A operation. |
| Rth(j-a) | 93 K/W - Junction-to-ambient thermal resistance with optimized 6 cm² mounting pad; determines temperature rise under load. |
| VCE(sat) | ≤ 0.5 V at IC = 500 mA, IB = 50 mA - Low saturation voltage reduces conduction loss in low-side switch configurations. |
| fT | 100–180 MHz - Transition frequency confirming suitability for fast-switching gate drivers up to ~10 MHz square-wave edges. |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed die pad for thermal enhancement; 3-pin flat-lead outline measuring 4.6 mm × 2.6 mm × 1.8 mm (L × W × H), compatible with standard reflow soldering footprints per Figure 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter | Reference node for biasing; connected to ground or low-side return path in switch configurations. |
| 2 | Collector | Main power output terminal; electrically tied to exposed die pad for thermal and current conduction. |
| 3 | Base | Control input requiring current-limited drive; typical IB = 50 mA for full saturation at IC = 500 mA. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and ESD robustness per JESD22 standards. |
| Three hFE bins | BCX54-10-QX offers mid-range gain (63–160), enabling consistent base resistor selection across production lots. |
| Exposed collector pad | Integral thermal path to PCB copper; enables 1.35 W dissipation with 6 cm² mounting area-3× higher than standard footprint. |
| Low VCE(sat) | ≤ 0.5 V ensures <125 mW conduction loss at 250 mA, critical for thermally constrained battery-powered devices. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
Use Scenario: Pass transistor in adjustable 3-terminal linear regulator (e.g., LM317-based) supplying 500 mA to microcontroller subsystems. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base current modulation; no timing function. Use Value: Stable 1 A current handling and 45 V breakdown margin allow safe operation across wide input ranges (e.g., 8–36 V automotive). |
Use Scenario: Gate driver stage for N-channel power MOSFET in buck converter or motor control half-bridge. IC Role / Device Role / Timing Role: Medium-current NPN switch translating logic-level signals into high-current gate charge/discharge pulses. Use Value: 180 MHz fT and 6 pF Cc ensure clean 10 ns–100 ns edge transitions without ringing or shoot-through risk. |
| Low-Side Switches | Battery-Driven Devices |
Use Scenario: Load switch controlling 12 V solenoid or relay coil in vehicle body electronics modules. IC Role / Device Role / Timing Role: High-current saturated switch sinking load current to ground; operates in DC or PWM mode. Use Value: 2 A peak pulse rating accommodates inrush currents; ≤0.5 V VCE(sat) minimizes heat generation during extended duty cycles. |
Use Scenario: Power-path control in portable medical monitors or handheld test equipment powered by Li-ion packs. IC Role / Device Role / Timing Role: Battery disconnect or enable switch managing system power-up sequencing and reverse-polarity protection. Use Value: AEC-Q101 qualification ensures reliability over 1000+ thermal cycles; -55 °C to +150 °C operating range supports cold-cranking and under-hood environments. |
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 |
|---|---|---|---|
| BCX54-16-Q | Higher hFE bin (100–250) at IC = 150 mA; identical VCEO, IC, package, and AEC-Q101 status. | Better suited for low-base-drive designs where precise current gain stability is required, e.g., precision current mirrors. | Select when base drive current must be minimized below 10 mA at 150 mA collector load. |
| ZTX653 | Same SOT89 package but higher VCEO = 60 V, lower hFE = 100–300, non-automotive grade (no AEC-Q101). | Used in industrial power supplies where higher voltage margin is needed but automotive qualification is not required. | Choose only for non-automotive applications needing >45 V headroom; avoid where AEC compliance is mandatory. |
Compared with BCX54-10-QX, BCX54-16-Q offers higher gain for reduced base drive burden, while ZTX653 trades automotive qualification for extended voltage rating-neither is pin-compatible without circuit validation.
Availability
BCX54-10-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC pre-regulators, and battery-powered instrumentation requiring stable component supply with AEC-Q101 assurance.
Supply support for BCX54-10-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 discrete and logic devices.
The BCX54-Q series belongs to Nexperia's automotive-qualified bipolar transistor product line, engineered specifically for robust linear regulation, gate driving, and switching in harsh-environment 12 V/24 V systems.
FAQ
What is the maximum allowable junction temperature for BCX54-10-QX?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in IEC 60134 limiting values. Operation above this threshold risks permanent degradation. Derating is required above 25 °C ambient-e.g., at 100 °C ambient, maximum Ptot drops to ~0.7 W with 6 cm² copper.
Is BCX54-10-QX suitable for PWM-driven loads?
Yes-its 2 A peak collector current (ICM) and 180 MHz fT support PWM frequencies up to several MHz. For 20 kHz motor control, VCE(sat) ≤ 0.5 V and low Cc = 6 pF minimize switching losses and prevent unintended turn-on due to dv/dt coupling.
How does the SOT89 exposed pad affect PCB layout?
The collector-connected exposed pad must be soldered to ≥6 cm² of internal or external copper for rated 1.35 W dissipation. Use thermal vias to inner ground planes if multilayer; avoid solder mask coverage on the pad to ensure mechanical and thermal integrity per Nexperia's Figure 10 footprint.
Does BCX54-10-QX require base current limiting in all applications?
Yes-base current must be limited to prevent damage. At IC = 500 mA, typical IB = 50 mA yields full saturation. A 100 Ω series resistor from a 5 V MCU GPIO limits IB to ~45 mA, ensuring safe operation while maintaining VCE(sat) ≤ 0.5 V.
BCX54-10-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:
- 63 @ 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
BCX54-10-QX FAQ
1.How can I place an order for BCX54-10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCX54-10-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 BCX54-10-QX reliable?
The price and inventory of BCX54-10-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCX54-10-QX is usually 5 days.
3.What payment methods are accepted for BCX54-10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCX54-10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCX54-10-QX?
BCX54-10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCX54-10-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 BCX54-10-QX?
For technical support, including BCX54-10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCX54-10-QX requirements.
6.How does Aetrix verify that BCX54-10-QX is sourced from the original manufacturer or authorized distributors?
All BCX54-10-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 BCX54-10-QX meets industry standards.
7.What is the process for return or replacement of BCX54-10-QX?
All BCX54-10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCX54-10-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 BCX54-10-QX part is unused and in its original packaging.
Return procedure for BCX54-10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BCX54-10-QX Tags
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