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Nexperia USA Inc. BC51-16PASX
- Part No.:
- BC51-16PASX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC51-16PASX.pdf
- Description:
- TRANS PNP 45V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,668
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Product details
Overview
BC51-16PASX from Nexperia is a PNP medium power transistor in DFN2020D-3 (SOT1061D) package, rated for −45 V VCEO, −1 A continuous collector current, and 100–250 hFE at VCE = −2 V, IC = −150 mA. It serves as a high-side switch or MOSFET driver in automotive-grade power management circuits with AEC-Q101 qualification.
For engineers reviewing the BC51-16PASX datasheet, BC51-16PASX pinout, BC51-16PASX application, or BC51-16PASX equivalent, this device is selected for linear voltage regulation, battery-powered load switching, and thermally constrained PCB layouts requiring side-wettable flanks for AOI-compatible solder joint inspection.
Technical Context
This PNP bipolar junction transistor operates in active or saturation mode with fixed emitter-base and collector-emitter polarity. Its design supports DC biasing in high-side configurations where base drive is referenced to ground and load connects between supply and collector.
Thermal performance is defined across five mounting conditions: Rth(j-a) ranges from 76 K/W (4-layer PCB + 1 cm² collector pad) to 298 K/W (single-sided FR4 standard footprint). Transient thermal impedance curves confirm suitability for pulsed loads up to 2 A peak with ≤1 ms pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-emitter voltage with base open; defines upper rail compatibility in 36 V automotive systems. |
| IC (continuous) | −1 A - Sustained DC collector current capability; enables direct driving of small solenoids or LED strings. |
| hFE | 100–250 - Current gain range at −150 mA collector current; ensures predictable base drive sizing for stable saturation. |
| VCE(sat) | ≤ −500 mV at IC = −500 mA, IB = −50 mA - Low saturation voltage minimizes conduction loss in switching applications. |
| Ptot | 1.65 W (4-layer PCB + 1 cm² collector pad) - Total power dissipation limit under optimized thermal layout. |
| fT | 145 MHz - Transition frequency confirms usable bandwidth for low-speed digital switching and analog amplification up to ~10 MHz. |
| AEC-Q101 | Qualified - Meets stress test requirements for discrete semiconductors in automotive environments (−40 °C to +125 °C ambient). |
Pinout & Package
DFN2020D-3 (SOT1061D) is an ultra-thin, leadless, surface-mount plastic package measuring 2.0 mm × 2.0 mm × 0.65 mm with side-wettable flanks for automated optical inspection and enhanced thermal conduction via exposed collector pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires negative current injection relative to emitter to turn on; compatible with standard CMOS/TTL logic level shifting. |
| 2 | Emitter (E) | Reference terminal; connected to system ground or higher potential rail depending on high-side configuration; carries full load current. |
| 3 | Collector (C) | Output terminal; ties to load; electrically and thermally coupled to exposed bottom pad for improved heat transfer to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Exposed collector pad | Enables direct thermal coupling to PCB copper area, reducing Rth(j-a) by up to 75 % versus standard SOT packages. |
| Side-wettable flanks | Facilitates automated optical inspection (AOI) of solder joints without X-ray, improving manufacturing yield in automotive production lines. |
| Two hFE bins | BC51-16PAS offers 100–250 hFE binning, enabling tighter control over base drive design versus generic BC51PAS (63–250) or BC51-10PAS (63–160). |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing-no additional qualification required for Tier-1 designs. |
| Ultra-thin profile | 0.65 mm max height allows integration into space-constrained modules such as battery management ICs or compact motor drivers. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
Use Scenario: Pass element in adjustable LDOs delivering 3.3 V/500 mA from 12 V battery input. IC Role / Device Role / Timing Role: PNP pass transistor operating in active region to regulate output voltage via feedback-controlled base current. Use Value: Low VCE(sat) and stable hFE ensure <1 % output drift over temperature and load, meeting automotive LDO accuracy specs. |
Use Scenario: Load switch controlling power to BLE module in portable medical sensor. IC Role / Device Role / Timing Role: High-side switch enabling/disabling VDD rail with logic-level base control from microcontroller GPIO. Use Value: AEC-Q101 rating and −45 V breakdown support 24 V battery backup operation while maintaining shutdown leakage <100 nA. |
| MOSFET Drivers | Power Management |
Use Scenario: Level-shifting stage driving N-channel high-side MOSFET gate in buck converter. IC Role / Device Role / Timing Role: PNP transistor sourcing gate current during turn-on and sinking during turn-off via complementary pair configuration. Use Value: 145 MHz fT and fast VBE response enable <100 ns switching transitions, minimizing shoot-through risk in synchronous topologies. |
Use Scenario: Current-sense amplifier front-end in automotive body control module. IC Role / Device Role / Timing Role: Amplifier stage using fixed-gain configuration to condition shunt voltage before ADC input. Use Value: Tight hFE bin (100–250) reduces gain variation across temperature, improving current measurement accuracy to ±2 % over −40 °C to +125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC51-10PAS | hFE = 63–160 at same test conditions; lower mid-range gain bin. | Suitable where base drive margin is ample and gain stability at low IC is less critical. | Select when cost optimization is prioritized and circuit tolerates wider hFE spread. |
| ZTX951 | TO-92 package; VCEO = −60 V; IC = −1 A; hFE = 100–800; no AEC-Q101 qualification. | Used in industrial non-automotive applications requiring higher voltage headroom and through-hole assembly. | Choose only for non-automotive designs needing higher VCEO and legacy through-hole compatibility. |
Compared with BC51-16PASX, BC51-10PAS offers lower gain consistency for cost-sensitive consumer designs, while ZTX951 trades AEC-Q101 compliance and SMD manufacturability for higher voltage rating and broader hFE range in through-hole form.
Availability
BC51-16PASX is available at Aetrix Electronics and suitable for automotive body electronics, battery management systems, and industrial power supplies requiring stable component supply with AEC-Q101 assurance and DFN2020D-3 thermal performance.
Supply support for BC51-16PASX 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 essential semiconductors for automotive, industrial, and mobile markets.
The BC51xPAS series targets automotive-grade discrete power control, delivering AEC-Q101 qualified PNP transistors optimized for thermal efficiency, AOI compatibility, and high-side switching in space-constrained modules.
FAQ
What is the maximum allowable junction temperature for BC51-16PASX?
The absolute maximum junction temperature (Tj) is 150 °C per IEC 60134 limiting values. Operation above this threshold risks permanent degradation. Derating is required above 25 °C ambient; for example, at 100 °C ambient, maximum allowable Ptot drops to ~0.8 W on a 4-layer FR4 board with 1 cm² collector pad.
Does BC51-16PASX support reflow soldering with standard lead-free profiles?
Yes-Nexperia specifies compatibility with JEDEC J-STD-020D.2 lead-free reflow profiles, including peak temperatures up to 260 °C for ≤30 seconds. The DFN2020D-3 package uses side-wettable flanks and a thermal pad optimized for controlled solder wetting and void minimization on standard stencil-defined footprints.
How does the hFE binning of BC51-16PASX differ from BC51PAS?
BC51-16PASX guarantees hFE = 100–250 at VCE = −2 V, IC = −150 mA, whereas BC51PAS covers 63–250. This tighter bin reduces base resistor tolerance sensitivity and improves consistency in current mirror or gain-critical amplifier stages without requiring post-production sorting.
Can BC51-16PASX replace BC807-16 in existing designs?
No-BC807-16 is an NPN transistor in SOT-343 package with different polarity, pinout (E-C-B), and thermal characteristics. Substitution would require circuit redesign including inversion of control logic and layout changes for thermal pad routing. No drop-in replacement exists between these devices.
BC51-16PASX 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:
- PNP
- 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:
- 145MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020D-3
BC51-16PASX FAQ
1.How can I place an order for BC51-16PASX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC51-16PASX 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 BC51-16PASX reliable?
The price and inventory of BC51-16PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC51-16PASX is usually 5 days.
3.What payment methods are accepted for BC51-16PASX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC51-16PASX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC51-16PASX?
BC51-16PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC51-16PASX 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 BC51-16PASX?
For technical support, including BC51-16PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC51-16PASX requirements.
6.How does Aetrix verify that BC51-16PASX is sourced from the original manufacturer or authorized distributors?
All BC51-16PASX 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 BC51-16PASX meets industry standards.
7.What is the process for return or replacement of BC51-16PASX?
All BC51-16PASX units undergo pre-shipment inspection (PSI). If there is an issue with BC51-16PASX, 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 BC51-16PASX part is unused and in its original packaging.
Return procedure for BC51-16PASX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC51-16PASX Tags
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