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Nexperia USA Inc. BC54-16PASX
- Part No.:
- BC54-16PASX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC54-16PASX.pdf
- Description:
- TRANS NPN 45V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,711
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Product details
Overview
BC54-16PASX from Nexperia is a 45 V, 1 A NPN medium power transistor in an ultra-thin DFN2020D-3 (SOT1061D) leadless SMD package, optimized for high-side switching and MOSFET driver stages in compact power management circuits, with hFE = 100–250 at VCE = 2 V, IC = 150 mA, and thermal resistance Rth(j-a) as low as 76 K/W on 4-layer FR4 PCBs.
For engineers reviewing the BC54-16PASX datasheet, BC54-16PASX pinout, BC54-16PASX application, or BC54-16PASX equivalent, this device is selected for space-constrained linear regulators, battery-powered load switches, and thermally demanding amplifier bias networks where side-wettable flanks enable AOI-compatible solder joint inspection and enhanced thermal dissipation.
Technical Context
This NPN transistor operates in active and saturation regions with VCEO = 45 V and IC = 1 A continuous rating, supporting pulsed peak currents up to 2 A (tp ≤ 1 ms). Its DFN2020D-3 package integrates exposed collector pad for direct thermal path to PCB copper, enabling stable operation up to Tj = 150 °C.
The BC54-16PASX features two defined hFE bins: 100–250 at IC = 150 mA (typical for driver gain stability), and ≥40 at IC = 500 mA (ensuring robust saturation under high-current switching). VCE(sat) ≤ 500 mV at IC = 500 mA / IB = 50 mA confirms low-loss conduction capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in high-side switch designs. |
| IC | 1 A - Continuous DC collector current; supports sustained load switching in portable power rails. |
| hFE | 100–250 @ VCE=2 V, IC=150 mA - Tight current gain bin enables predictable base drive sizing in linear regulators. |
| VCE(sat) | ≤500 mV @ IC=500 mA, IB=50 mA - Low saturation voltage minimizes power loss and self-heating in switching applications. |
| Rth(j-a) | 76 K/W - Achieved on 4-layer FR4 with 1 cm² collector pad; enables >1 W dissipation without heatsink in space-limited layouts. |
| fT | 100–180 MHz - Sufficient bandwidth for fast-switching drivers and RF-coupled amplifier stages up to ~100 MHz. |
| Cc | 6 pF - Low collector capacitance reduces Miller effect, improving switching speed and stability in high-gain configurations. |
Pinout & Package
BC54-16PASX uses the DFN2020D-3 (SOT1061D) 2 mm × 2 mm × 0.65 mm ultra-thin leadless package with side-wettable flanks for automated optical inspection and enhanced thermal transfer via exposed collector pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input node requiring current-limited drive; connects to microcontroller GPIO or op-amp output in driver circuits. |
| 2 | Emitter (E) | Reference node tied to ground or low-side return path; forms common-emitter configuration with collector as switched output. |
| 3 | Collector (C) | High-current output terminal; electrically and thermally connected to PCB copper pour for power delivery and heat sinking. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Direct thermal interface to PCB copper enables 1.65 W total power dissipation on 4-layer FR4 with 1 cm² mounting area. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing defect escape rate. |
| Two hFE bins | BC54-16PASX's 100–250 hFE range ensures consistent gain across production lots for stable biasing in linear regulators. |
| Ultra-thin profile | 0.65 mm max height allows integration into slim consumer devices and stacked PCB assemblies with tight Z-axis constraints. |
| Medium power capability | Combines 1 A continuous current with 45 V breakdown-bridges gap between small-signal and power transistors in compact SMPS feedback paths. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
Use Scenario: Pass transistor in adjustable LDOs delivering 1–3 A to microcontrollers and sensors in handheld instruments. IC Role / Device Role / Timing Role: NPN emitter-follower configured as series pass element, regulating output by modulating base voltage. Use Value: Low VCE(sat) (≤500 mV) minimizes dropout voltage and improves efficiency at full load, extending battery runtime. |
Use Scenario: Load switch controlling power to Bluetooth modules, displays, or sensors in wearables and IoT edge nodes. IC Role / Device Role / Timing Role: High-side switch driven by MCU GPIO, enabling software-controlled power gating. Use Value: Exposed collector pad dissipates heat directly into PCB, allowing 1 A switching without external heatsink in 2-layer board designs. |
| MOSFET Drivers | Power Management |
Use Scenario: Gate driver stage for discrete N-channel MOSFETs in DC-DC buck converters and motor control H-bridges. IC Role / Device Role / Timing Role: Current amplifier boosting MCU GPIO output to deliver ≥50 mA peak gate charge current. Use Value: fT ≥ 100 MHz ensures fast turn-on/turn-off transitions, reducing switching losses in 500 kHz–1 MHz SMPS designs. |
Use Scenario: Current mirror or bias generator in multi-rail PMICs for FPGA or SoC power sequencing. IC Role / Device Role / Timing Role: Precision current source/sink element leveraging matched hFE bin for stable reference current generation. Use Value: Tight hFE range (100–250) reduces part-to-part variation in mirrored currents, improving rail tracking accuracy. |
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 |
|---|---|---|---|
| BC54-10PAS | hFE = 63–160 (lower mid-range gain); same package, voltage, and current ratings. | Suitable for lower-gain driver stages where tighter hFE tolerance is not required, e.g., simple on/off switches. | Select when gain consistency at IC = 150 mA is less critical than cost optimization. |
| BC817-40,215 | SOT-23 package (larger footprint, no side-wettable flanks); hFE = 250–630; VCEO = 45 V; IC = 500 mA. | Limited to ≤500 mA continuous use; lacks thermal performance of DFN2020D-3 for 1 A loads. | Choose only if legacy SOT-23 layout compatibility is mandatory and thermal headroom is available. |
Compared with BC54-10PAS and BC817-40,215, BC54-16PASX delivers superior thermal performance (76 K/W vs. >200 K/W), guaranteed high-gain binning for precision biasing, and AOI-ready packaging-making it optimal for next-gen compact, high-efficiency power stages.
Availability
BC54-16PASX is available at Aetrix Electronics and suitable for linear voltage regulators, battery-driven devices, and MOSFET drivers requiring stable component supply, consistent hFE binning, and ultra-thin thermal-enhanced packaging.
Supply support for BC54-16PASX 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, industrial, and mobile power solutions.
The BC54xPAS series targets space-constrained power management applications needing medium-current switching, precise gain control, and advanced thermal performance in ultra-thin packages-designed specifically for modern portable and embedded systems.
FAQ
What is the maximum junction temperature and how does it affect PCB layout?
The BC54-16PASX has a maximum junction temperature of 150 °C. To maintain reliability, PCB layout must provide adequate copper area for the exposed collector pad: 1 cm² on 4-layer FR4 achieves Rth(j-a) = 76 K/W, limiting temperature rise to ≤76 °C at 1 W dissipation. Smaller pads or single-layer boards require derating per Figure 1.
Is BC54-16PASX suitable for automotive applications?
No. Per Nexperia's revision history (v.3, 20241009), the BC54xPAS series is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, consult Nexperia's -Q qualified alternatives such as BC54-16PAS-Q.
How does the side-wettable flank design improve manufacturing yield?
The side-wettable flanks on the DFN2020D-3 package allow automated optical inspection (AOI) systems to verify solder fillet formation on all three terminals-including the bottom-mounted collector-without requiring X-ray. This detects insufficient solder, bridging, or misalignment early in SMT lines, reducing field failure rates in high-volume production.
What is the significance of the 'CF' marking code on BC54-16PASX?
The 'CF' top-side laser marking identifies the BC54-16PASX variant per Table 4 of the datasheet. It distinguishes this specific hFE bin (100–250) from BC54PAS ('CD') and BC54-10PAS ('CE'), ensuring correct sorting during assembly and traceability for gain-critical applications like precision current sources.
BC54-16PASX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-UDFN Exposed Pad
- 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:
- 420 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020D-3
BC54-16PASX FAQ
1.How can I place an order for BC54-16PASX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC54-16PASX 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 BC54-16PASX reliable?
The price and inventory of BC54-16PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC54-16PASX is usually 5 days.
3.What payment methods are accepted for BC54-16PASX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC54-16PASX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC54-16PASX?
BC54-16PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC54-16PASX 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 BC54-16PASX?
For technical support, including BC54-16PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC54-16PASX requirements.
6.How does Aetrix verify that BC54-16PASX is sourced from the original manufacturer or authorized distributors?
All BC54-16PASX 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 BC54-16PASX meets industry standards.
7.What is the process for return or replacement of BC54-16PASX?
All BC54-16PASX units undergo pre-shipment inspection (PSI). If there is an issue with BC54-16PASX, 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 BC54-16PASX part is unused and in its original packaging.
Return procedure for BC54-16PASX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC54-16PASX Tags
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BC847B,215
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