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Nexperia USA Inc. BC51PA,115
- Part No.:
- BC51PA,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-PowerUDFN
- Datasheet:
-
BC51PA,115.pdf
- Description:
- TRANS PNP 45V 1A 3HUSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,835
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Product details
Overview
BC51PA,115 from Nexperia is a PNP medium power transistor in SOT1061 (HUSON3) package, rated for −45 V VCEO, −1 A continuous collector current, and AEC-Q101 qualified for automotive use. It delivers high thermal performance with Rth(j-sp) = 20 K/W and supports linear voltage regulation, high-side switching, and MOSFET driver stages in space-constrained PCBs.
For engineers reviewing the BC51PA,115 datasheet, BC51PA,115 pinout, BC51PA,115 application, or BC51PA,115 equivalent, this device is selected for its three hFE gain selections (63–250), exposed thermal pad for enhanced heat dissipation, and leadless ultra-thin 2 × 2 × 0.65 mm footprint-critical for battery-driven devices and power management modules requiring stable DC gain at −150 mA.
Technical Context
This PNP bipolar junction transistor operates in linear and switching modes with VCE(sat) ≤ −0.5 V at IC = −500 mA / IB = −50 mA and fT = 145 MHz, enabling use in low-noise amplification and fast-switching control paths. Its AEC-Q101 qualification confirms robustness across −55 °C to +150 °C ambient operation.
The SOT1061 package integrates a thermally enhanced copper-exposed collector terminal, achieving Rth(j-a) = 76 K/W under 4-layer PCB conditions with 1 cm² collector pad-significantly lower than SOT223/SOT89 alternatives-and supports reflow-only soldering per JEDEC J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V: Maximum safe collector-emitter voltage before breakdown in open-base configuration. |
| IC | −1 A: Continuous DC collector current rating defining steady-state power handling capability. |
| hFE | 63–250 at VCE = −2 V, IC = −150 mA: Three factory-selected DC current gain bins for precision biasing control. |
| VCE(sat) | ≤ −0.5 V at IC = −500 mA / IB = −50 mA: Low saturation voltage minimizes conduction loss in switching applications. |
| fT | 145 MHz: Transition frequency confirming usable bandwidth for audio-frequency amplification and signal buffering. |
| Rth(j-sp) | 20 K/W: Junction-to-solder-point thermal resistance enables direct thermal coupling to PCB copper for reliable power dissipation. |
| AEC-Q101 | Qualified: Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
SOT1061 (HUSON3) is a leadless, ultra-thin 3-terminal surface-mount package measuring 2.0 × 2.0 × 0.65 mm with an exposed collector thermal pad on the bottom side. The package provides excellent thermal and electrical conductivity via direct copper contact to the PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input for forward-biased PNP operation; requires negative base current relative to emitter to turn on. |
| 2 | Emiter | Reference terminal for current sourcing; connected to higher potential rail in high-side switch configurations. |
| 3 | Collector | Main current output terminal and primary thermal path; electrically and thermally tied to exposed copper pad on package underside. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE selections | Gain bins of 63–160 (−10), 100–250 (−16), and 63–250 (standard) enable precise DC bias stability across production lots. |
| AEC-Q101 qualification | Validated for automotive under-hood environments including 1000-cycle temperature cycling and 1000-hour high-temp reverse bias stress. |
| Ultra-thin SOT1061 package | 2.0 × 2.0 × 0.65 mm body with no leads reduces board area by >50% vs. SOT89 and improves mechanical robustness in vibration-prone systems. |
| Exposed collector thermal pad | Direct thermal interface to PCB copper achieves Rth(j-a) = 76 K/W (4-layer, 1 cm² pad), enabling 1.65 W max power dissipation. |
| High power dissipation capability | Ptot = 1.10 W (FR4, 6 cm² collector pad) supports sustained operation in linear regulator pass elements without external heatsinking. |
Applications
| Linear Voltage Regulators | High-Side Switches |
|---|---|
Use Scenario: Used as the pass transistor in adjustable LDO regulators delivering up to 1 A load current with <1 % line/load regulation. IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via emitter-follower configuration with feedback to base. Use Value: Low VCE(sat) and stable hFE ensure minimal dropout voltage and consistent regulation across temperature and load. |
Use Scenario: Controls power delivery to automotive sensors or infotainment subsystems from a 12 V rail. IC Role / Device Role / Timing Role: High-side switch driven by microcontroller GPIO through base resistor network. Use Value: AEC-Q101 qualification and −45 V rating provide fault tolerance against load dump transients in 12 V vehicle systems. |
| Battery-Driven Devices | MOSFET Drivers |
Use Scenario: Enables efficient power sequencing in portable medical monitors and handheld test equipment powered by Li-ion cells. IC Role / Device Role / Timing Role: Acts as a low-quiescent-current enable switch for subsystem power rails during sleep/wake transitions. Use Value: Ultra-low ICBO (≤ −100 nA) and wide Tamb range (−55 °C to +150 °C) extend battery life and ensure cold-start reliability. |
Use Scenario: Drives the gate of N-channel power MOSFETs in DC-DC converter half-bridge topologies. IC Role / Device Role / Timing Role: Complementary PNP stage providing fast turn-off current sink for MOSFET gate discharge. Use Value: 145 MHz fT and low Cc (15 pF) support clean, sub-100 ns switching edges critical for high-efficiency SMPS designs. |
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 |
|---|---|---|---|
| BCX51,115 | SOT89 package; higher Rth(j-a) (93 K/W min); same −45 V/−1 A rating but no AEC-Q101 qualification. | Limited to industrial/commercial use; lacks automotive stress-test validation and thermal pad integration. | Select when cost sensitivity outweighs automotive compliance and thermal performance requirements. |
| BCP51,115 | SOT223 package; larger footprint (6.7 × 3.7 mm); Rth(j-a) = 93 K/W (6 cm² pad); AEC-Q101 qualified. | Preferred where manual rework or wave soldering is required; less suitable for ultra-dense layouts. | Choose when board-level repairability or legacy footprint compatibility is prioritized over miniaturization. |
Compared with BCX51,115 and BCP51,115, BC51PA,115 uniquely combines AEC-Q101 qualification, ultra-compact SOT1061 packaging, and lowest thermal resistance to solder point (20 K/W), making it optimal for next-generation automotive ECUs and space-constrained power management ICs.
Availability
BC51PA,115 is available at Aetrix Electronics and suitable for linear voltage regulators, high-side switches, and battery-driven devices requiring stable component supply and automotive-grade reliability.
Supply support for BC51PA,115 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 energy-efficient solutions.
BC51PA,115 belongs to Nexperia's AEC-Q101-qualified PNP medium power transistor family, designed specifically for automotive power management, linear regulation, and high-side switching applications demanding compact size and thermal resilience.
FAQ
What is the maximum allowable junction temperature for BC51PA,115?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent degradation of hFE, leakage current, and bond wire integrity. Derating curves in Figure 10–14 must be applied based on PCB copper layer count and collector pad area to maintain safe Tj under load.
Is BC51PA,115 compatible with lead-free reflow soldering processes?
Yes-BC51PA,115 is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C for 30 seconds. The SOT1061 package outline (Figure 26) specifies exact solder paste stencil dimensions and land patterns optimized for void-free thermal pad wetting and coplanarity control.
How does the hFE selection affect circuit design?
BC51PA,115 offers three hFE bins: standard (63–250), −10 (63–160), and −16 (100–250). Designers select based on required base drive margin and gain stability-e.g., −16 bin ensures minimum hFE ≥ 100 at IC = −150 mA, simplifying bias network design for predictable turn-on thresholds in switching applications.
Can BC51PA,115 replace BCX51 in existing SOT89 footprints?
No-BC51PA,115 uses SOT1061 (2.0 × 2.0 mm), while BCX51 uses SOT89 (4.6 × 2.3 mm). The packages are physically incompatible due to different pin pitch, terminal layout (SOT1061: base-emitter-collector; SOT89: emitter-collector-base), and thermal pad geometry. Board redesign is required for migration.
BC51PA,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-PowerUDFN
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-HUSON (2x2)
BC51PA,115 FAQ
1.How can I place an order for BC51PA,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC51PA,115 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 BC51PA,115 reliable?
The price and inventory of BC51PA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC51PA,115 is usually 5 days.
3.What payment methods are accepted for BC51PA,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC51PA,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC51PA,115?
BC51PA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC51PA,115 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 BC51PA,115?
For technical support, including BC51PA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC51PA,115 requirements.
6.How does Aetrix verify that BC51PA,115 is sourced from the original manufacturer or authorized distributors?
All BC51PA,115 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 BC51PA,115 meets industry standards.
7.What is the process for return or replacement of BC51PA,115?
All BC51PA,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC51PA,115, 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 BC51PA,115 part is unused and in its original packaging.
Return procedure for BC51PA,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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