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Nexperia USA Inc. BC53PAS-QX
- Part No.:
- BC53PAS-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-UDFN Exposed Pad
- Datasheet:
-
BC53PAS-QX.pdf
- Description:
- TRANS PNP 80V 1A DFN2020D-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,527
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Product details
Overview
BC53PAS-QX from Nexperia is a PNP medium power transistor in DFN2020D-3 (SOT1061D) package, rated for −80 V VCEO, −1 A continuous collector current, and 1.65 W total power dissipation at Tamb = 25 °C. It delivers hFE = 63–250 at VCE = −2 V, IC = −150 mA, and supports automotive-grade operation per AEC-Q101. It serves as a high-side switch or MOSFET driver in battery-powered linear regulators.
For engineers reviewing the BC53PAS-QX datasheet, BC53PAS-QX pinout, BC53PAS-QX application, or BC53PAS-QX equivalent, this page provides verified package dimensions, thermal resistance values (Rth(j-a) down to 76 K/W), DC current gain bins, saturation voltage (−500 mV @ IC = −500 mA, IB = −50 mA), and AOI-compatible side-wettable flanks - all critical for space-constrained automotive PCB layouts.
Technical Context
This PNP bipolar junction transistor operates with an emitter-base cutoff voltage of −5 V and collector-base breakdown of −100 V, enabling robust blocking in high-side configurations. Its fT = 145 MHz and Cc = 15 pF support moderate-frequency switching up to several hundred kHz in power management stages.
The device uses an ultra-thin DFN2020D-3 package with exposed collector pad for direct thermal conduction to PCB copper. Thermal resistance varies from 76 K/W (4-layer board + 1 cm² collector pad) to 298 K/W (single-layer standard footprint), directly linking layout decisions to safe operating area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −80 V: Maximum safe collector-emitter reverse bias before avalanche; defines high-side switch voltage headroom. |
| IC | −1 A continuous: Sustained load current capability; enables driving 1 A loads without forced cooling. |
| hFE | 63–250 at VCE = −2 V, IC = −150 mA: Current gain bin ensures predictable base drive sizing across production lots. |
| VCE(sat) | −500 mV @ IC = −500 mA, IB = −50 mA: Low saturation voltage minimizes conduction loss in linear regulator pass elements. |
| Ptot | 1.65 W @ Tamb = 25 °C on 4-layer FR4 with 1 cm² collector pad: Defines maximum steady-state power handling under defined board conditions. |
| Rth(j-a) | 76 K/W minimum: Achievable only with optimized 4-layer PCB and dedicated collector thermal pad; critical for thermal margin calculation. |
| fT | 145 MHz: Enables stable operation in feedback loops up to ~10 MHz with adequate phase margin. |
Pinout & Package
DFN2020D-3 (SOT1061D) is a 2 mm × 2 mm × 0.65 mm leadless plastic package with side-wettable flanks for automated optical inspection (AOI) and enhanced thermal transfer via exposed collector pad. The package has no leads; terminals are soldered directly to PCB pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires −50 mA base current to saturate at −500 mA collector current. |
| 2 | Emitter (E) | Current source node; connected to higher potential rail in high-side switch configuration. |
| 3 | Collector (C) | Power output node; thermally tied to exposed bottom pad for PCB heat sinking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring reliability over temperature cycling and vibration. |
| Side-wettable flanks | Enables 100% AOI solder joint inspection without X-ray; eliminates hidden voids in reflow-soldered ultra-thin packages. |
| Exposed collector pad | Provides low-impedance thermal path to PCB; reduces junction-to-ambient resistance by up to 75% vs. standard SOT-23. |
| Two hFE bins | BC53PAS-Q (63–250) and BC53-10PAS-Q (63–160) allow precise gain matching for matched-pair circuits or feedback stability tuning. |
| −5 V VEBO | Permits direct interface with 3.3 V or 5 V microcontroller GPIO without level-shifting when used as a level translator or driver. |
Applications
| Linear Voltage Regulators | Battery-Driven Devices |
|---|---|
|
Use Scenario: Pass element in adjustable LDOs delivering up to 1 A to microcontrollers or sensors in automotive infotainment systems. IC Role / Device Role / Timing Role: PNP pass transistor regulating output voltage by modulating emitter-collector current based on error amplifier feedback. Use Value: −500 mV VCE(sat) limits dropout voltage, enabling regulation from 3.3 V input to 3.0 V output at full load. |
Use Scenario: Load switch controlling power to BLE modules or display backlights in portable medical monitors. IC Role / Device Role / Timing Role: High-side enable switch turning on/off power rails using logic-level base drive from MCU GPIO. Use Value: −80 V VCEO and AEC-Q101 qualification ensure reliable operation across 12 V automotive battery transients and cold-crank conditions. |
| MOSFET Drivers | Power Management |
|
Use Scenario: Gate driver stage for N-channel high-side MOSFETs in DC-DC buck converters for ADAS camera modules. IC Role / Device Role / Timing Role: Level-shifting current amplifier converting low-voltage PWM signal into high-current gate charge/discharge pulses. Use Value: 145 MHz fT and 15 pF Cc support clean 500 kHz switching with minimal gate drive delay and ringing. |
Use Scenario: Current-sense amplifier front-end or protection circuitry in USB-C PD power delivery adapters. IC Role / Device Role / Timing Role: Precision current mirror or active clamp element monitoring and limiting output current during fault events. Use Value: Tight hFE binning (63–250) and −100 nA ICBO at 25 °C ensure accurate current replication across temperature and process variation. |
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 |
|---|---|---|---|
| BC807-40-Q | Same DFN2020D-3 package; lower VCEO (−45 V), higher hFE (250–600), same AEC-Q101 rating. | Not suitable for >45 V rail applications; better for low-voltage logic-level switching where gain consistency is critical. | Select when operating below 40 V and requiring tighter hFE tolerance or lower VCE(sat) at light loads. |
| PN2907A | TO-92 through-hole package; −60 V VCEO, −600 mA IC, non-automotive grade. | Lacks AOI compatibility and thermal performance; unsuitable for high-density automotive PCBs. | Choose only for legacy prototyping or cost-sensitive non-automotive consumer designs where manual assembly is acceptable. |
Compared with BC807-40-Q and PN2907A, BC53PAS-QX uniquely balances −80 V blocking, −1 A current, AEC-Q101 compliance, and DFN2020D-3 thermal efficiency-making it optimal for next-generation compact automotive power nodes where voltage headroom and board area are constrained.
Availability
BC53PAS-QX is available at Aetrix Electronics and suitable for automotive body control modules, battery management systems, and industrial power supplies requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for BC53PAS-QX 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, logic, and MOSFET devices, with leadership in automotive-qualified components.
The BC53xPAS-Q series targets space-constrained automotive power management, delivering medium-power PNP switching in ultra-thin DFN packages with side-wettable flanks for zero-defect manufacturing.
FAQ
What is the maximum allowable junction temperature for BC53PAS-QX?
The absolute maximum junction temperature (Tj) is 150 °C, as specified in the limiting values table. Operation above this temperature risks permanent degradation of hFE, leakage current, and bond wire integrity. Derating curves in Figure 1 confirm power must be reduced linearly above 25 °C ambient, reaching zero dissipation at 175 °C case temperature.
Does BC53PAS-QX require a heatsink on the PCB?
No discrete heatsink is required, but thermal design is mandatory: the exposed collector pad must be connected to ≥1 cm² of internal or external copper pour on a 4-layer board to achieve the 76 K/W Rth(j-a) rating. Without this, Rth(j-a) degrades to 298 K/W, limiting usable power to ~0.4 W at 25 °C ambient.
Can BC53PAS-QX replace BC557 in existing designs?
No direct replacement: BC557 is a TO-92 PNP transistor rated for −45 V and −100 mA, while BC53PAS-QX is −80 V/−1 A in DFN2020D-3. Pinout differs (TO-92: E-B-C vs. DFN: B-E-C), package thermal behavior is incompatible, and base drive requirements differ significantly due to higher current gain and saturation characteristics.
Is the marking code 'CA' unique to BC53PAS-QX?
Yes - per Table 4, 'CA' is the exclusive top-side laser marking for BC53PAS-QX. BC53-10PAS-Q uses 'CB', and BC53-16PAS-Q uses 'CC'. This allows unambiguous identification on assembled PCBs and supports automated optical inspection traceability in automotive production lines.
BC53PAS-QX 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):
- 80 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-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN2020D-3
BC53PAS-QX FAQ
1.How can I place an order for BC53PAS-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC53PAS-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 BC53PAS-QX reliable?
The price and inventory of BC53PAS-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC53PAS-QX is usually 5 days.
3.What payment methods are accepted for BC53PAS-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC53PAS-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC53PAS-QX?
BC53PAS-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC53PAS-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 BC53PAS-QX?
For technical support, including BC53PAS-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC53PAS-QX requirements.
6.How does Aetrix verify that BC53PAS-QX is sourced from the original manufacturer or authorized distributors?
All BC53PAS-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 BC53PAS-QX meets industry standards.
7.What is the process for return or replacement of BC53PAS-QX?
All BC53PAS-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC53PAS-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 BC53PAS-QX part is unused and in its original packaging.
Return procedure for BC53PAS-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC53PAS-QX Tags
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