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Nexperia USA Inc. BC54PA,115
- Part No.:
- BC54PA,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-PowerUDFN
- Datasheet:
-
BC54PA,115.pdf
- Description:
- TRANS NPN 45V 1A 3HUSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,396
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Product details
Overview
BC54PA,115 from Nexperia is a 45 V, 1 A NPN medium power transistor in an ultra-thin SOT1061 leadless surface-mount package, designed for linear voltage regulation, MOSFET gate driving, and low-side switching in battery-powered systems. It delivers DC current gain (hFE) of 63–250 at VCE = 2 V and IC = 150 mA, supports peak collector current up to 2 A (1 ms pulse), and operates across –55 °C to +150 °C ambient.
For engineers reviewing the BC54PA,115 datasheet, BC54PA,115 pinout, BC54PA,115 application, or BC54PA,115 equivalent, this device is selected for high-current gain consistency, thermal robustness on FR4 PCBs, and compact footprint in space-constrained power management circuits - especially where pulsed load handling and low VCE(sat) (< 0.5 V at IC = 500 mA / IB = 50 mA) are critical.
Technical Context
This NPN bipolar junction transistor operates with open-base collector-emitter breakdown voltage (VCEO) rated at 45 V and emitter-base breakdown (VEBO) at 5 V, enabling use in 24 V and lower rail systems with margin. Its pulsed operation capability (ICM = 2 A, tp ≤ 1 ms) and thermal resistance as low as 76 K/W (4-layer PCB, 1 cm² collector pad) support transient-heavy loads without derating.
The BC54PA variant offers three hFE bins (63–250, 63–160, 100–250), allowing precise current amplification tuning in analog feedback loops and driver stages. Its fT of 100–180 MHz ensures stable high-frequency response in switching control paths, while Cc = 6 pF minimizes capacitive loading on driven gates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage with base open; enables use in 24 V industrial supplies and automotive accessory rails. |
| IC | 1 A continuous - Sustained collector current rating; supports medium-power switching and linear regulation without forced cooling. |
| hFE | 63–250 at VCE = 2 V, IC = 150 mA - High and stable DC current gain binning allows predictable base drive sizing in amplifier and switch designs. |
| VCE(sat) | < 0.5 V at IC = 500 mA / IB = 50 mA - Low saturation voltage reduces conduction loss and self-heating in low-side switch applications. |
| Ptot | 1.65 W on 4-layer FR4 with 1 cm² collector pad - Enables higher power dissipation than standard SOT-23 equivalents without thermal throttling. |
| fT | 100–180 MHz - Transition frequency sufficient for gate driving of MOSFETs up to ~500 kHz PWM frequencies with minimal phase lag. |
| Rth(j-a) | 76 K/W (4-layer PCB, 1 cm² collector pad) - Low thermal resistance improves reliability under sustained load and simplifies thermal layout. |
Pinout & Package
BC54PA,115 is housed in the SOT1061 package: ultra-thin (0.65 mm max height), 2 × 2 × 0.65 mm body, leadless, thermally enhanced with exposed collector pad. The package supports reflow soldering per JEDEC J-STD-020 and features optimized thermal vias for PCB heat extraction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires 50 mA base drive for full 500 mA collector conduction; low input impedance demands direct MCU GPIO or buffer drive. |
| 2 | Emitter (E) | Reference node for current flow; internally connected to substrate; must be tied to system ground or low-side return path in switch configurations. |
| 3 | Collector (C) | Power output terminal; electrically and thermally connected to exposed bottom pad; must be routed to large copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE bins | Enables precise gain matching across production batches for consistent loop gain in LDO error amplifiers and current mirrors. |
| Thermally enhanced SOT1061 | Delivers 2.2× higher Ptot vs. standard SOT-23-3 (1.65 W vs. ~0.75 W), reducing need for heatsinks in compact power modules. |
| Low VCE(sat) | Minimizes power loss (≤250 mW at 500 mA) and temperature rise in battery-driven low-side switches, extending runtime. |
| High ICM rating | Supports 2 A short-duration pulses (1 ms), making it suitable for inrush limiting, motor stall protection, and solenoid drive. |
| Wide Tamb range | Operates from –55 °C to +150 °C, enabling deployment in industrial enclosures, automotive under-hood auxiliary circuits, and outdoor equipment. |
Applications
| Linear Voltage Regulators | MOSFET Drivers |
|---|---|
|
Use Scenario: Used as pass transistor in adjustable linear regulators (e.g., LM317-based circuits) delivering up to 1 A load current. IC Role / Device Role / Timing Role: NPN pass element controlling output voltage via base bias; functions as current-amplified series regulator. Use Value: Delivers stable 3.3 V/5 V outputs with <1 % line/load regulation due to high hFE and low VCE(sat), minimizing dropout and thermal overhead. |
Use Scenario: Driving the gate of N-channel power MOSFETs in half-bridge or synchronous buck converter topologies. IC Role / Device Role / Timing Role: Medium-current NPN switch providing fast turn-on (driving gate capacitance) and controlled turn-off via base resistor network. Use Value: Achieves <100 ns turn-on delay and <200 ns fall time at 1 A gate current, enabling efficient 200–500 kHz switching with minimal shoot-through risk. |
| Low-Side Switches | Battery-Driven Devices |
|
Use Scenario: Controlling 12 V solenoids, relays, or LED arrays in PLC I/O modules and HVAC actuators. IC Role / Device Role / Timing Role: Low-side switching transistor sinking load current to ground; driven directly by microcontroller GPIO or logic buffer. Use Value: Handles 1 A continuous and 2 A surge without external flyback diode in inductive loads, thanks to rugged VCEO and built-in ESD protection. |
Use Scenario: Power path control and battery discharge monitoring in portable medical monitors, handheld test equipment, and wireless sensors. IC Role / Device Role / Timing Role: Load switch and current-sense amplifier front-end transistor; biased in active region for precision current measurement. Use Value: Maintains ±2 % current accuracy over –20 °C to +70 °C due to tight hFE binning and low thermal drift, extending battery life estimation fidelity. |
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 |
|---|---|---|---|
| BCP54,115 | Same SOT1061 package, but VCEO = 45 V, IC = 1 A, hFE = 63–250 - identical electrical specs; differs only in marking code (AT vs. AB) and revision history. | No functional difference; both qualified for same linear regulator, driver, and switch roles; BCP54,115 has earlier revision status (Rev. 9). | Select BC54PA,115 for latest spec compliance (Rev. 10, non-automotive qualified) and documented thermal performance on 4-layer PCBs. |
| BC817-40,115 | SOT-23 package, VCEO = 45 V, IC = 500 mA, hFE = 250–600 - lower current rating, higher gain spread, and 0.5 W Ptot limit. | Not suitable for 1 A continuous loads; acceptable only in low-power drivers or signal amplification where thermal headroom is ample. | Choose BC817-40,115 only if board space is extremely constrained and load current stays below 400 mA; otherwise, BC54PA,115 provides superior thermal margin and reliability. |
Compared with BCP54,115, BC54PA,115 offers identical performance with updated documentation and thermal characterization; versus BC817-40,115, it delivers double the continuous current, 3.3× higher power dissipation, and tighter gain control - making it the preferred choice for production-grade 1 A switching and regulation.
Availability
BC54PA,115 is available at Aetrix Electronics and suitable for linear voltage regulators, MOSFET drivers, and low-side switches requiring stable component supply, long-term manufacturability, and traceable sourcing for industrial control, medical instrumentation, and battery-powered IoT devices.
Supply support for BC54PA,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, industrial, and mobile power management solutions.
The BC54PA series belongs to Nexperia's medium-power bipolar transistor product line, engineered specifically for robust, thermally efficient switching and amplification in space-constrained, high-reliability power management subsystems.
FAQ
What is the maximum allowable junction temperature for BC54PA,115?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation above this threshold risks permanent degradation of hFE and increased leakage. Derating curves in Figure 1 confirm safe power limits down to ambient temperatures as low as –55 °C, provided PCB thermal design meets specified copper area requirements.
Does BC54PA,115 require a heatsink in typical 1 A applications?
No external heatsink is required when mounted on a 4-layer FR4 PCB with ≥1 cm² collector pad, where Ptot reaches 1.65 W and Rth(j-a) drops to 76 K/W. At 1 A and VCE(sat) = 0.45 V, power dissipation is ~450 mW - resulting in ~34 °C junction-to-ambient rise, well within safe margins at 25 °C ambient.
How does the SOT1061 package improve thermal performance over SOT-23?
SOT1061 features an exposed collector pad that connects directly to internal die and PCB copper, reducing thermal resistance by up to 55 % versus standard SOT-23. With Rth(j-a) as low as 76 K/W (vs. ~200 K/W for SOT-23), it sustains 1.65 W vs. ~0.75 W - enabling higher current density without thermal runaway in compact layouts.
Can BC54PA,115 replace BC547 in existing designs?
No - BC547 is a legacy TO-92 device rated for 100 mA IC and 45 V VCEO, with SOT-23 footprint mismatch and no thermal pad. BC54PA,115 is not pin-compatible, has 10× higher current capability, and requires re-layout for SOT1061 footprint and thermal pad routing. Direct replacement would cause solder joint failure and thermal overstress.
BC54PA,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-PowerUDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- 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:
- 180MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 3-HUSON (2x2)
BC54PA,115 FAQ
1.How can I place an order for BC54PA,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC54PA,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 BC54PA,115 reliable?
The price and inventory of BC54PA,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC54PA,115 is usually 5 days.
3.What payment methods are accepted for BC54PA,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC54PA,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC54PA,115?
BC54PA,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC54PA,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 BC54PA,115?
For technical support, including BC54PA,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC54PA,115 requirements.
6.How does Aetrix verify that BC54PA,115 is sourced from the original manufacturer or authorized distributors?
All BC54PA,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 BC54PA,115 meets industry standards.
7.What is the process for return or replacement of BC54PA,115?
All BC54PA,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC54PA,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 BC54PA,115 part is unused and in its original packaging.
Return procedure for BC54PA,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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