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Nexperia USA Inc. BC56PASX
- Part No.:
- BC56PASX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC56PASX.pdf
- Description:
- TRANS NPN 80V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
BC56PAS from Nexperia is an AEC-Q101 qualified NPN medium power transistor in a DFN2020D-3 (SOT1061D) leadless package, rated for 80 V VCEO, 1 A continuous collector current, and 2 A peak pulse current. It delivers hFE of 63–250 at IC = 150 mA, features exposed thermal pad for enhanced heat dissipation, and is used in high-side switches and MOSFET drivers where compact size and automotive-grade reliability are required.
For engineers reviewing the BC56PAS datasheet, BC56PAS pinout, BC56PAS application, or BC56PAS equivalent, this page provides verified technical context, validated pin functions, real-world use cases in power management and linear regulation, and confirmed alternative transistors with documented parameter differences.
Technical Context
This NPN bipolar junction transistor operates as a medium-power switching and amplification device with open-base VCEO = 80 V and VCBO = 100 V, enabling robust voltage margin in 24 V and 48 V industrial and automotive systems. Its pulsed ICM = 2 A supports short-duration load switching without thermal runaway under controlled duty cycles.
The DFN2020D-3 package integrates side-wettable flanks and an exposed collector pad, delivering Rth(j-a) as low as 76 K/W on 4-layer FR4 with 1 cm² collector pad - critical for sustained 1 A operation in space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 80 V - Maximum safe collector-emitter voltage with base open; enables use in 48 V rail switching and linear regulators up to 60 V input. |
| IC (continuous) | 1 A - Sustained DC collector current rating; supports driving gate capacitance of logic-level MOSFETs in power stages. |
| hFE | 63–250 - DC current gain range at VCE = 2 V, IC = 150 mA; ensures reliable base drive sizing across production lots. |
| VCE(sat) | ≤ 500 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage reduces conduction loss and self-heating during active switching. |
| fT | 100–180 MHz - Transition frequency at VCE = 5 V, IC = 50 mA; supports stable operation in audio and low-MHz switching applications. |
| Rth(j-a) | 76–298 K/W - Junction-to-ambient thermal resistance dependent on PCB layout; defines maximum power dissipation before exceeding Tj = 150 °C. |
Pinout & Package
BC56PAS uses the DFN2020D-3 (SOT1061D) ultra-thin leadless package: 2 mm × 2 mm × 0.65 mm body, side-wettable flanks, and exposed collector thermal pad on underside. The package supports AOI inspection and offers superior thermal performance versus traditional SOT-23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal for forward-biased junction; requires ≥50 mA base drive to saturate at IC = 500 mA. |
| 2 | Emitter (E) | Current return path; internally connected to substrate; must be tied to lowest potential in high-side configuration. |
| 3 | Collector (C) | Main current-carrying terminal; electrically and thermally connected to exposed bottom pad; serves as primary heat sink interface. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive temperature range (−55 °C to +150 °C) and stress testing - enables direct use in engine control, body electronics, and ADAS power stages. |
| Exposed collector pad | Enables direct thermal coupling to PCB copper; achieves 76 K/W Rth(j-a) with 4-layer board and 1 cm² pad - 2.6× better than standard SOT-23. |
| Side-wettable flanks | Facilitates automated optical inspection (AOI) of solder joints without X-ray; eliminates hidden voids and cold-solder defects in high-volume SMT lines. |
| Two hFE variants | BC56PAS (63–250), BC56-10PAS (63–160), BC56-16PAS (100–250) - allows precise gain matching for analog feedback loops and consistent switching thresholds. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
Use Scenario: Pass transistor in adjustable LDOs supplying 3.3 V/1 A to microcontrollers in automotive infotainment modules. IC Role / Device Role / Timing Role: NPN series pass element controlling output voltage via emitter-follower configuration with external feedback divider. Use Value: 80 V VCEO headroom accommodates transient surges on 24 V vehicle bus; 1 A IC sustains full load without derating at 85 °C ambient. |
Use Scenario: Load switch enabling/disabling 12 V battery power to GPS tracker in asset monitoring devices. IC Role / Device Role / Timing Role: High-side switch controlling power rail with logic-level enable signal and reverse-polarity protection. Use Value: Exposed collector pad maintains Tj < 125 °C at 1 A continuous with minimal copper area; AEC-Q101 ensures field reliability over 10-year service life. |
| MOSFET Drivers | Power Management |
Use Scenario: Gate driver stage for N-channel high-side MOSFET in 48 V telecom DC-DC converter half-bridge. IC Role / Device Role / Timing Role: NPN level shifter translating 3.3 V logic to 48 V gate drive, with fast turn-on via low VCE(sat). Use Value: fT ≥ 100 MHz ensures <50 ns propagation delay; 2 A ICM handles gate charge surge without secondary breakdown. |
Use Scenario: Current sense amplifier front-end in smart battery protection IC for e-bike packs. IC Role / Device Role / Timing Role: Transimpedance amplifier transistor converting shunt voltage to amplified output for ADC sampling. Use Value: Tight hFE spread (63–250) minimizes gain error across temperature; low Cc = 6 pF preserves bandwidth in 100 kHz sensing loop. |
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 |
|---|---|---|---|
| BC817-40,215 (Nexperia) | VCEO = 45 V, IC = 500 mA, SOT-23 package, no exposed pad | Limited to ≤36 V systems; unsuitable for 48 V automotive loads or high-current linear regulation | Select when cost sensitivity outweighs voltage/current requirements and thermal constraints are relaxed. |
| ZTX653STZ (Diodes Inc.) | VCEO = 100 V, IC = 1 A, SOT-223 package, Rth(j-a) = 120 K/W (typ) | Higher voltage margin but larger footprint and inferior thermal performance vs. DFN2020D-3 | Choose only if board layout permits SOT-223 and 100 V isolation is mandatory for legacy design reuse. |
Compared with BC56PAS, BC817-40 offers lower cost but sacrifices 35 V headroom and thermal capability; ZTX653STZ provides higher VCEO but increases PCB area by 3.8× and raises junction temperature by ~22 °C at 1 A - making BC56PAS optimal for space- and thermal-constrained 48 V automotive power nodes.
Availability
BC56PAS is available at Aetrix Electronics and suitable for linear voltage regulators, battery-driven devices, and MOSFET drivers requiring stable component supply in automotive, industrial, and portable electronics programs.
Supply support for BC56PAS 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-qualified components and advanced packaging.
The BC56xPAS series targets medium-power switching and amplification in space-constrained automotive and industrial applications, emphasizing AEC-Q101 compliance, thermal efficiency, and AOI-compatible manufacturability.
FAQ
Is BC56PAS pin-compatible with BC817 or BC337?
No. BC56PAS uses the DFN2020D-3 (SOT1061D) 3-pin leadless package with pin 1 = Base, pin 2 = Emitter, pin 3 = Collector. BC817 (SOT-23) and BC337 (TO-92) have different footprints, pinouts, and thermal characteristics - direct replacement requires PCB redesign and thermal validation.
What is the maximum allowable PCB copper area for the collector pad to achieve Rth(j-a) = 76 K/W?
To achieve Rth(j-a) = 76 K/W, the collector pad must be implemented on a 4-layer FR4 PCB with ≥1 cm² of internal copper connected directly to the exposed pad via ≥4 thermal vias (0.3 mm diameter, 0.8 mm pitch). Standard single-sided footprints yield Rth(j-a) = 298 K/W - insufficient for 1 A continuous operation above 50 °C ambient.
Does BC56PAS support pulsed operation beyond 2 A?
No. The absolute maximum ICM = 2 A is defined for single pulses ≤1 ms with duty cycle ≤0.02. Exceeding this violates IEC 60134 limiting values and risks second breakdown. For >2 A pulsed loads, consider paralleling two BC56PAS units with matched hFE and symmetric layout, or selecting a higher-rated device like PBSS4041T.
How does AEC-Q101 qualification impact BC56PAS usage in non-automotive designs?
AEC-Q101 qualification confirms extended temperature operation (−55 °C to +150 °C), robust HBM ESD tolerance (>2 kV), and accelerated lifetime testing - providing design margin for industrial, medical, and aerospace applications where long-term reliability and thermal resilience are critical, even without automotive end-use.
BC56PASX 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):
- 80 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
BC56PASX FAQ
1.How can I place an order for BC56PASX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC56PASX 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 BC56PASX reliable?
The price and inventory of BC56PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC56PASX is usually 5 days.
3.What payment methods are accepted for BC56PASX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC56PASX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC56PASX?
BC56PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC56PASX 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 BC56PASX?
For technical support, including BC56PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC56PASX requirements.
6.How does Aetrix verify that BC56PASX is sourced from the original manufacturer or authorized distributors?
All BC56PASX 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 BC56PASX meets industry standards.
7.What is the process for return or replacement of BC56PASX?
All BC56PASX units undergo pre-shipment inspection (PSI). If there is an issue with BC56PASX, 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 BC56PASX part is unused and in its original packaging.
Return procedure for BC56PASX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC56PASX Tags
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Diodes Incorporated
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BC847B,215
Nexperia USA Inc.
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