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Nexperia USA Inc. BC55PA,115
- Part No.:
- BC55PA,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC55PA,115.pdf
- Description:
- TRANS NPN 60V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,447
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Product details
Overview
BC55PA,115 from Nexperia is an AEC-Q101-qualified NPN medium power transistor in a leadless SOT1061 package, rated for 60 V VCEO, 1 A continuous collector current, and 1.65 W total power dissipation on 4-layer FR4 PCB with collector pad. It delivers hFE = 63–250 at IC = 150 mA and is used in linear voltage regulators and MOSFET drivers where thermal performance and automotive-grade reliability are required.
For engineers reviewing the BC55PA,115 datasheet, BC55PA,115 pinout, BC55PA,115 application, or BC55PA,115 equivalent, this device serves as a high-current, thermally robust NPN switch in battery-driven power management and low-side switching circuits - with verified thermal resistance (Rth(j-sp) = 20 K/W) and pulsed ICM = 2 A capability.
Technical Context
The BC55PA,115 operates as a general-purpose NPN bipolar junction transistor optimized for medium-power linear and switching applications. Its SOT1061 package integrates an exposed die pad to reduce Rth(j-sp) to 20 K/W and supports up to 1.65 W dissipation under defined PCB mounting conditions.
It features three hFE variants (BC55PA/BC55-10PA/BC55-16PA), with this variant offering 63–250 gain at VCE = 2 V, IC = 150 mA, and Tamb = 25 °C. The device meets AEC-Q101 stress test requirements for automotive use and exhibits VBE ≤ 1 V and VCE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum safe collector-emitter voltage with base open; defines upper rail limit in low-side switch designs. |
| IC | 1 A continuous - Sustained DC load current handling capacity; suitable for driving 500 mA–1 A gate loads or regulator pass elements. |
| hFE | 63–250 at IC = 150 mA - Wide DC current gain range enables stable biasing across temperature and production lots. |
| Ptot | 1.65 W (4-layer FR4, 1 cm² collector pad) - Highest thermal derating envelope among listed mounting configurations. |
| Rth(j-sp) | 20 K/W - Junction-to-solder-point thermal resistance confirms efficient heat transfer to PCB copper, critical for sustained power operation. |
| fT | 100–180 MHz - Transition frequency supports high-speed switching up to ~50 MHz with adequate gain margin. |
| VCE(sat) | ≤ 0.5 V at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss in switching applications. |
Pinout & Package
SOT1061 is an ultra-thin, leadless surface-mount plastic package with an exposed die pad for enhanced thermal and electrical conductivity. Dimensions: 2.1 × 1.9 × 0.65 mm (L × W × H); footprint includes solderable collector pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires ≥50 mA base drive for full 500 mA collector saturation. |
| 2 | Emitter (E) | Common reference terminal; internally connected to exposed die pad ground plane in PCB layout. |
| 3 | Collector (C) | Main power output node; electrically and thermally tied to exposed pad - must be routed to large copper area. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive ambient temperature range (−55 °C to +150 °C) and stress testing per discrete semiconductor standard. |
| Exposed thermal pad | Enables Rth(j-sp) = 20 K/W - reduces junction temperature rise by >30 % vs. standard SOT packages under identical load. |
| Three hFE options | BC55PA (63–250), BC55-10PA (63–160), BC55-16PA (100–250) - allows precise gain matching without external resistor tuning. |
| High peak current | ICM = 2 A (1 ms pulse) - supports surge handling in motor start-up or capacitor charging circuits. |
| Low VBE | ≤ 1 V at IC = 500 mA - reduces base drive power requirement and eases compatibility with 3.3 V logic controllers. |
Applications
| Linear Voltage Regulators | Power Management |
|---|---|
Use Scenario: Used as the series pass transistor in adjustable linear regulators (e.g., LM317-based designs) delivering up to 1 A output current. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; operates in active region for precise regulation. Use Value: 60 V VCEO headroom accommodates wide input ranges (e.g., 12–48 V industrial rails), while 1.65 W Ptot supports continuous 1 A at ΔT ≤ 60 K. |
Use Scenario: Implements current-limiting and overcurrent protection in USB-C PD or multi-rail PMIC subsystems. IC Role / Device Role / Timing Role: Low-side current sense switch enabling foldback or shutdown during fault events. Use Value: AEC-Q101 rating ensures reliability in automotive infotainment power sequencing; 2 A ICM handles transient surges without latch-up. |
| Low-Side Switches | MOSFET Drivers |
Use Scenario: Controls 12 V solenoid valves or LED arrays in body electronics modules requiring <1 A load switching. IC Role / Device Role / Timing Role: Saturated NPN switch turning ON/OFF grounded loads; driven directly from microcontroller GPIO. Use Value: VCE(sat) ≤ 0.5 V limits power loss to <500 mW at 1 A, reducing thermal design burden in sealed enclosures. |
Use Scenario: Drives the gate of N-channel power MOSFETs in half-bridge motor drivers or DC-DC synchronous rectifiers. IC Role / Device Role / Timing Role: High-current buffer stage translating logic-level signals into fast, high-peak gate charge injection. Use Value: fT ≥ 100 MHz and 2 A ICM enable sub-100 ns turn-on transitions for 30 V/10 A MOSFETs with minimal Miller plateau delay. |
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 |
|---|---|---|---|
| BCX55,115 | Same SOT1061 package, but lower Ptot = 0.83 W (single-sided FR4, 1 cm² pad); hFE = 63–250 identical. | Not AEC-Q101 qualified; limited to industrial/commercial ambient (−55 °C to +150 °C not validated). | Select when automotive qualification is unnecessary and thermal budget permits lower power dissipation. |
| BCP55,115 | SOT223 package (larger footprint); Ptot = 1.5 W (standard mounting); hFE = 63–250; same VCEO/IC. | Higher Rth(j-a) = 125 K/W (vs. 76 K/W for BC55PA on 4-layer board); less compact layout. | Choose when board space allows larger package and legacy SOT223 footprint compatibility is required. |
Compared with BCX55,115 and BCP55,115, the BC55PA,115 uniquely combines AEC-Q101 qualification, ultra-thin SOT1061 packaging, and the highest thermal performance (1.65 W / 76 K/W) - making it optimal for space-constrained automotive power stages where reliability and power density are jointly critical.
Availability
BC55PA,115 is available at Aetrix Electronics and suitable for linear voltage regulators, low-side switches, and MOSFET drivers requiring stable component supply in automotive and industrial embedded systems.
Supply support for BC55PA,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 essential semiconductors - including logic, discretes, MOSFETs, and ESD protection devices.
The BC55PA,115 belongs to Nexperia's AEC-Q101-qualified medium-power transistor product line, engineered for robust operation in automotive body electronics, power management, and industrial control systems demanding long-term stability and thermal resilience.
FAQ
What is the maximum continuous collector current for BC55PA,115?
The BC55PA,115 is rated for 1 A continuous collector current (IC) under recommended operating conditions. This rating assumes proper PCB thermal design - specifically, mounting on a 4-layer FR4 board with a 1 cm² collector pad - to maintain junction temperature below 150 °C. Exceeding 1 A continuously without enhanced cooling risks thermal runaway.
Is BC55PA,115 pin-compatible with BCX55,115?
Yes - BC55PA,115 and BCX55,115 share identical SOT1061 package dimensions, pin assignment (1=B, 2=E, 3=C), and footprint. However, BC55PA,115 is AEC-Q101 qualified and rated for higher total power dissipation (1.65 W vs. 0.83 W), so direct substitution requires validation of thermal margins and automotive compliance requirements.
What does the '115' suffix indicate in BC55PA,115?
The '115' suffix denotes the tape-and-reel packaging option per JEDEC standard: 10,000 units per reel, 12 mm tape width, and 4 mm pocket pitch. It does not affect electrical characteristics - all BC55PA variants (including BC55PA,115 and BC55PA,135) share identical silicon, gain binning, and thermal specifications.
Can BC55PA,115 be used in switching power supplies?
Yes - its 2 A peak collector current (ICM), 100–180 MHz fT, and low VCE(sat) ≤ 0.5 V support use in low-frequency (<500 kHz) switching applications such as gate drivers or auxiliary power stage switches. However, it is not optimized for high-frequency SMPS primary-side switching due to bipolar storage time limitations versus RF MOSFETs or GaN devices.
BC55PA,115 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):
- 60 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
BC55PA,115 FAQ
1.How can I place an order for BC55PA,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC55PA,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 BC55PA,115 reliable?
The price and inventory of BC55PA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC55PA,115 is usually 5 days.
3.What payment methods are accepted for BC55PA,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC55PA,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC55PA,115?
BC55PA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC55PA,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 BC55PA,115?
For technical support, including BC55PA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC55PA,115 requirements.
6.How does Aetrix verify that BC55PA,115 is sourced from the original manufacturer or authorized distributors?
All BC55PA,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 BC55PA,115 meets industry standards.
7.What is the process for return or replacement of BC55PA,115?
All BC55PA,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC55PA,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 BC55PA,115 part is unused and in its original packaging.
Return procedure for BC55PA,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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