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Nexperia USA Inc. BC51-10PASX
- Part No.:
- BC51-10PASX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC51-10PASX.pdf
- Description:
- TRANS PNP 45V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,408
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Product details
Overview
BC51-10PASX from Nexperia is a PNP medium power transistor in DFN2020D-3 (SOT1061D) package, rated for −45 V VCEO, −1 A continuous collector current, and 160 hFE at −150 mA / −2 V, with AEC-Q101 qualification for automotive-grade reliability in high-side switch and MOSFET driver circuits.
For engineers reviewing the BC51-10PASX datasheet, BC51-10PASX pinout, BC51-10PASX application, or BC51-10PASX equivalent, this device supports thermal-aware PCB layout via side-wettable flanks, delivers stable DC gain across −55 °C to +150 °C, and enables compact power management in space-constrained battery-driven systems.
Technical Context
This PNP bipolar junction transistor operates in linear and switching modes with verified −500 mV VCE(sat) at −500 mA / −50 mA drive and −1 V VBE under same conditions. Its 15 pF Cc and 145 MHz fT support moderate-speed switching up to ~10 MHz in regulator feedback paths and gate drive stages.
The device uses an ultra-thin leadless DFN2020D-3 package with exposed collector pad for direct thermal coupling to PCB copper. Thermal resistance Rth(j-a) ranges from 76 K/W (4-layer board, 1 cm² collector pad) to 298 K/W (single-layer standard footprint), enabling predictable derating in industrial and automotive ambient profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-emitter voltage with base open; defines high-side switch blocking capability in 24 V/36 V automotive rails. |
| IC | −1 A - Continuous DC collector current; supports sustained load switching in linear regulators and battery protection circuits. |
| hFE | 63–160 - DC current gain range at VCE = −2 V, IC = −150 mA; ensures reliable base drive sizing for MOSFET gate control without overdesign. |
| VCE(sat) | −500 mV max at IC = −500 mA, IB = −50 mA; minimizes conduction loss and self-heating in active-pass element configurations. |
| Ptot | 1.65 W at Tamb ≤ 25 °C on 4-layer FR4 with 1 cm² collector pad; enables >1 W dissipation without heatsink in thermally optimized layouts. |
| Rth(j-sp) | 20 K/W - Junction-to-solder-point thermal resistance in free air; confirms efficient heat transfer through side-wettable flanks during reflow and operation. |
Pinout & Package
BC51-10PASX uses the DFN2020D-3 (SOT1061D) ultra-thin leadless package: 2 mm × 2 mm × 0.65 mm body, 1.3 mm pitch, side-wettable flanks for AOI-compatible solder joint inspection, and exposed collector terminal for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB ≤ −0.3 A per absolute maximum rating. |
| 2 | Emitter (E) | Common reference terminal for PNP operation; connected to higher potential rail in high-side configurations. |
| 3 | Collector (C) | Main output terminal; electrically and thermally tied to exposed bottom pad for low-inductance, low-resistance power path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power stages per stress test requirements. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing defect escape in high-volume SMT lines. |
| Exposed collector pad | Provides direct thermal conduction path to PCB copper, lowering Rth(j-a) by up to 75% versus standard SOT packages under identical layout conditions. |
| Two hFE variants | BC51-10PASX (63–160) offers tighter gain distribution than BC51PAS (63–250), simplifying base bias design in production-critical analog circuits. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
|
Use Scenario: Pass transistor in adjustable LDOs delivering 1–3 A at 3.3 V/5 V from 12 V or 24 V input rails. IC Role / Device Role / Timing Role: PNP emitter-follower pass element controlling output voltage via feedback loop; no timing function. Use Value: −500 mV VCE(sat) reduces dropout voltage and improves efficiency at full load, while AEC-Q101 rating ensures field reliability in automotive infotainment power supplies. |
Use Scenario: Load switch enabling/disabling power to Bluetooth modules, sensors, or display backlights in portable medical or handheld test equipment. IC Role / Device Role / Timing Role: High-side discrete switch controlled by microcontroller GPIO; no timing or signal conditioning role. Use Value: 1 A continuous rating and −45 V VCEO allow direct use with Li-ion (up to 3S) or 24 V sealed lead-acid batteries without external clamping or derating. |
| MOSFET Drivers | Power Management |
|
Use Scenario: Level-shifting stage driving N-channel high-side MOSFET gates in half-bridge motor drivers or DC-DC converters. IC Role / Device Role / Timing Role: Fast-switching PNP pull-down element complementing NPN or NMOS level shifter; operates at <10 MHz edge rates. Use Value: 145 MHz fT and 15 pF Cc ensure minimal propagation delay and clean gate discharge, reducing shoot-through risk in synchronous topologies. |
Use Scenario: Current-sense amplifier front-end or precision current mirror in battery fuel gauging and charger IC auxiliary circuitry. IC Role / Device Role / Timing Role: Precision analog current amplification node; gain stability over temperature critical for measurement accuracy. Use Value: hFE variation of only ±20% across −55 °C to +125 °C (Fig. 7) maintains consistent current mirroring ratio without calibration compensation. |
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 |
|---|---|---|---|
| BC807-16X | Same DFN2020D-3 package, −45 V VCEO, but hFE = 100–250 at −100 mA; higher gain spread and no AEC-Q101 certification. | Preferred in non-automotive consumer power stages where gain tolerance is less critical and cost sensitivity is higher. | Select when AEC-Q101 is not required and wider hFE range is acceptable for simplified BOM consolidation. |
| MMBT3906LT1G | SOT-23 package, −40 V VCEO, −200 mA IC, hFE = 100–300; lower power rating and no side-wettable flanks. | Suitable for low-current bias networks or signal inversion, not for ≥500 mA switching or thermal-intensive loads. | Choose only for space-tolerant, low-power signal-level tasks-unsuitable as drop-in replacement for BC51-10PASX's 1 A capability or thermal performance. |
Compared with BC807-16X and MMBT3906LT1G, BC51-10PASX provides guaranteed automotive qualification, tighter hFE binning, and superior thermal dissipation via exposed collector pad-making it the sole choice for production-grade 1 A high-side switches in harsh-environment systems.
Availability
BC51-10PASX is available at Aetrix Electronics and suitable for linear voltage regulators, battery-driven devices, and MOSFET drivers requiring stable component supply, AEC-Q101 compliance, and high-reliability thermal performance in compact footprints.
Supply support for BC51-10PASX 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 specializing in high-performance, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BC51xPAS series targets automotive and industrial power management applications demanding robust PNP transistors in ultra-thin, thermally enhanced DFN packages-designed specifically for high-side switching, regulator pass elements, and gate driving where space, thermal margin, and qualification matter.
FAQ
What is the maximum allowable base current for BC51-10PASX?
The absolute maximum base current is −0.3 A, per Table 5 Limiting Values. For reliable operation, design base drive to stay within −50 mA typical for 500 mA collector current, ensuring VCE(sat) remains ≤ −500 mV and junction temperature stays below 150 °C under worst-case ambient and PCB thermal conditions.
Does BC51-10PASX require a heatsink in 1 A continuous operation?
No external heatsink is required if mounted on a 4-layer FR4 PCB with ≥1 cm² copper area connected to the exposed collector pad, where Ptot derates to 1.65 W at 25 °C ambient. At 85 °C ambient, usable power drops to ~1.1 W-still sufficient for 1 A at VCE ≤ −1.1 V, assuming proper layout per Figure 1.
How does the side-wettable flank design impact solder reflow yield?
The side-wettable flanks enable automated optical inspection (AOI) of solder fillet formation on all three terminals-including the bottom-exposed collector-without X-ray. This increases first-pass yield in high-volume SMT lines by detecting insufficient solder, bridging, or misalignment before functional test, per Section 2 Features and Benefits.
Can BC51-10PASX replace BC51PAS in existing designs?
Yes, BC51-10PASX is pin- and footprint-compatible with BC51PAS and shares identical VCEO, IC, and package dimensions, but offers tighter hFE (63–160 vs. 63–250). This improves predictability in base-bias-critical circuits like current mirrors or precision regulators, with no layout or thermal redesign needed.
BC51-10PASX 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
BC51-10PASX FAQ
1.How can I place an order for BC51-10PASX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC51-10PASX 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 BC51-10PASX reliable?
The price and inventory of BC51-10PASX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC51-10PASX is usually 5 days.
3.What payment methods are accepted for BC51-10PASX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC51-10PASX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC51-10PASX?
BC51-10PASX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC51-10PASX 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 BC51-10PASX?
For technical support, including BC51-10PASX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC51-10PASX requirements.
6.How does Aetrix verify that BC51-10PASX is sourced from the original manufacturer or authorized distributors?
All BC51-10PASX 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 BC51-10PASX meets industry standards.
7.What is the process for return or replacement of BC51-10PASX?
All BC51-10PASX units undergo pre-shipment inspection (PSI). If there is an issue with BC51-10PASX, 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 BC51-10PASX part is unused and in its original packaging.
Return procedure for BC51-10PASX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC51-10PASX Tags
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