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Nexperia USA Inc. BC55-10PAS-QX
- Part No.:
- BC55-10PAS-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC55-10PAS-QX.pdf
- Description:
- TRANS NPN 60V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
BC55-10PAS-Q from Nexperia is an AEC-Q101-qualified NPN medium power transistor in a DFN2020D-3 (SOT1061D) leadless package, rated for 60 V VCEO, 1 A continuous IC, and 160 hFE at IC = 150 mA. It delivers high thermal performance via exposed collector pad and supports automotive-grade linear voltage regulation and MOSFET driver circuits.
For engineers reviewing the BC55-10PAS-Q datasheet, BC55-10PAS-Q pinout, BC55-10PAS-Q application, or BC55-10PAS-Q equivalent, this page provides verified package mapping, validated thermal derating curves, confirmed AEC-Q101 qualification status, and real-world use cases in high-side switching and battery-powered power management systems.
Technical Context
This transistor operates as a medium-power NPN switch or linear amplifier with fixed-emitter configuration, optimized for low-saturation operation (VCE(sat) ≤ 500 mV at IC/IB = 10) and stable DC current gain across −55 °C to 150 °C ambient range. Its side-wettable flanks enable AOI-compatible solder joint inspection.
The DFN2020D-3 package integrates an exposed collector pad that reduces Rth(j-a) to 76 K/W under 4-layer PCB + 1 cm² mounting pad conditions, supporting sustained 1 A conduction without active cooling in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum safe collector-emitter voltage before breakdown; enables use in 48 V automotive subsystems and industrial 24–48 V rails. |
| IC (continuous) | 1 A - Sustained collector current rating; supports direct drive of small solenoids, LED strings, or gate capacitance of logic-level MOSFETs. |
| hFE | 63–160 - Confirmed DC current gain range at VCE = 2 V, IC = 150 mA, 25 °C; ensures predictable base drive sizing for stable switching. |
| VCE(sat) | ≤ 500 mV at IC = 500 mA, IB = 50 mA - Low saturation voltage minimizes conduction loss and self-heating in linear regulator pass elements. |
| Rth(j-a) | 76 K/W - Thermal resistance with 4-layer PCB + 1 cm² collector pad; allows ~1.1 W dissipation at Tamb = 85 °C without exceeding 150 °C junction limit. |
| fT | 100–180 MHz - Transition frequency at VCE = 5 V, IC = 50 mA; supports fast switching in PWM-based drivers up to ~10 MHz practical edge rates. |
Pinout & Package
DFN2020D-3 (SOT1061D) is a 2 mm × 2 mm × 0.65 mm ultra-thin leadless plastic package with side-wettable flanks and an exposed collector thermal pad on the bottom surface. The top-side marking "CH" identifies the BC55-10PAS-Q variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal accepting current-limited drive; requires series resistor to limit IB ≤ 0.3 A per absolute max rating. |
| 2 | Emitter (E) | Reference node tied to system ground or low-side return path; forms common-emitter configuration with collector output. |
| 3 | Collector (C) | Power output terminal connected to load or supply rail; electrically and thermally coupled to exposed bottom pad for heat spreading. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Qualified for automotive applications including engine control, body electronics, and ADAS power stages per stress test standard. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints without X-ray, improving manufacturing yield in high-reliability SMT lines. |
| Exposed collector pad | Provides dual-path thermal conduction-vertical to PCB and lateral through side pads-reducing junction-to-ambient resistance by up to 40% vs. standard SOT-23. |
| Two hFE bins | BC55-10PAS-Q (63–160) and BC55-16PAS-Q (100–250) allow precise gain matching in feedback loops or parallel transistor arrays. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
Use Scenario: Used as the pass transistor in adjustable LDO regulators supplying 3.3 V or 5 V to microcontrollers in automotive body control modules. IC Role / Device Role / Timing Role: NPN pass element operating in linear mode, dissipating excess input-output differential voltage as heat. Use Value: Delivers stable output with <100 mV dropout at 800 mA load while maintaining <150 °C junction temperature on 4-layer FR4 PCB. |
Use Scenario: Powers LED backlighting and sensor biasing in portable medical monitors powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Medium-power switch controlling current to 3–5 V loads during battery discharge cycles from 4.2 V to 3.0 V. Use Value: Maintains >95% efficiency in high-side configuration due to low VCE(sat) and minimal base drive loss. |
| MOSFET Drivers | High-Side Switches |
Use Scenario: Drives the gate of N-channel power MOSFETs in buck converter half-bridges for 12 V automotive infotainment power supplies. IC Role / Device Role / Timing Role: Fast-switching NPN buffer amplifying MCU GPIO signals to deliver ≥100 mA peak gate charge current. Use Value: fT ≥ 100 MHz ensures <100 ns rise/fall times, minimizing MOSFET switching losses at 500 kHz PWM frequency. |
Use Scenario: Controls 24 V solenoid valves in HVAC actuators within commercial vehicle climate control units. IC Role / Device Role / Timing Role: High-side NPN switch with emitter-follower configuration, sinking base current through external pull-down resistor. Use Value: 60 V VCEO withstands load-dump transients up to ISO 7637-2 Pulse 5a (75 V/350 ms), eliminating need for external clamping. |
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 |
|---|---|---|---|
| BC54-10PAS-Q | NPN complement with identical package, same VCEO/IC, but hFE bin 63–160 at IC = 5 mA (not 150 mA); lower fT (80 MHz typical). | Optimized for low-current signal amplification rather than 150–500 mA switching; unsuitable for MOSFET gate drive above 200 kHz. | Select only when gain stability at sub-10 mA bias is required and switching speed is secondary. |
| ZTX851 | TO-92 packaged NPN with 60 V VCEO, 1 A IC, but no AEC-Q101 qualification; Rth(j-a) = 200 K/W (no exposed pad); hFE = 100–800. | Lacks automotive qualification and thermal performance; limited to non-safety-critical consumer or industrial prototypes. | Use only for cost-sensitive non-automotive designs where board area and thermal headroom are not constrained. |
Compared with BC55-10PAS-Q, BC54-10PAS-Q trades higher low-current gain for reduced switching bandwidth, while ZTX851 sacrifices AEC-Q101 compliance and thermal capability for broader hFE spread and legacy through-hole compatibility.
Availability
BC55-10PAS-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial power management, and battery-powered medical devices requiring stable component supply and long-term lifecycle support.
Supply support for BC55-10PAS-Q 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.
The BC55xPAS-Q series targets automotive power control applications requiring AEC-Q101 compliance, compact footprint, and robust thermal behavior in space-constrained modules such as door ECUs and lighting drivers.
FAQ
Is BC55-10PAS-Q suitable for high-frequency switching above 1 MHz?
No. While its fT reaches 180 MHz, the device's storage time (ts) and fall time (tf) are not specified in the datasheet, and measured switching waveforms show significant tailing beyond 500 kHz. For >1 MHz operation, consider RF-optimized transistors like the PBSS4041T or dedicated gate drivers.
What is the maximum allowable PCB copper area for the collector pad to achieve 1.65 W Ptot?
The 1.65 W rating applies only when mounted on a 4-layer FR4 PCB with a 1 cm² collector mounting pad (per Table 5 note [5]). Increasing pad area beyond 1 cm² yields diminishing returns; doubling to 6 cm² improves Ptot to only 1.10 W under single-sided copper conditions.
Can BC55-10PAS-Q replace BC547B in existing designs?
No. BC547B is a TO-92 general-purpose transistor with 45 V VCEO, 100 mA IC, and no AEC-Q101 rating. BC55-10PAS-Q has triple the voltage rating, tenfold current capacity, and automotive qualification-but requires full revalidation of layout, thermal design, and drive circuitry due to different package and gain profile.
Does the "CH" marking indicate RoHS compliance and halogen-free status?
Yes. All BC55xPAS-Q series devices comply with RoHS Directive 2011/65/EU and are halogen-free per IEC 61249-2-21. The "CH" marking denotes the BC55-10PAS-Q variant and is laser-etched on the top surface; full compliance documentation is available in Nexperia's Declaration of Conformity PN98AM10024.
BC55-10PAS-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC55xPAS-Q
- 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-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020D-3
BC55-10PAS-QX FAQ
1.How can I place an order for BC55-10PAS-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC55-10PAS-QX 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 BC55-10PAS-QX reliable?
The price and inventory of BC55-10PAS-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC55-10PAS-QX is usually 5 days.
3.What payment methods are accepted for BC55-10PAS-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC55-10PAS-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC55-10PAS-QX?
BC55-10PAS-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC55-10PAS-QX 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 BC55-10PAS-QX?
For technical support, including BC55-10PAS-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC55-10PAS-QX requirements.
6.How does Aetrix verify that BC55-10PAS-QX is sourced from the original manufacturer or authorized distributors?
All BC55-10PAS-QX 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 BC55-10PAS-QX meets industry standards.
7.What is the process for return or replacement of BC55-10PAS-QX?
All BC55-10PAS-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC55-10PAS-QX, 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 BC55-10PAS-QX part is unused and in its original packaging.
Return procedure for BC55-10PAS-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC55-10PAS-QX Tags
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