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Nexperia USA Inc. BC857CQC-QZ
- Part No.:
- BC857CQC-QZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XDFN Exposed Pad
- Datasheet:
-
BC857CQC-QZ.pdf
- Description:
- TRANS PNP 45V 0.1A DFN1412D-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,800
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Product details
Overview
BC857CQC-QZ from Nexperia is a PNP general-purpose transistor in a DFN1412D-3 (SOT8009) leadless SMD package with side-wettable flanks, rated for −45 V VCEO, −100 mA IC, and hFE = 420–800 at VCE = −5 V / IC = −2 mA, qualified to AEC-Q101 for automotive signal switching in space-constrained PCBs.
For engineers reviewing the BC857CQC-QZ datasheet, BC857CQC-QZ pinout, BC857CQC-QZ application, or BC857CQC-QZ equivalent, this device serves as a high-reliability, AOI-compatible PNP switch in low-power analog and digital interface circuits where ultra-small footprint and thermal robustness are critical.
Technical Context
This transistor operates as a current-controlled PNP switch with base-emitter forward bias enabling collector-emitter conduction. Its −45 V VCEO rating supports operation in 24 V automotive supply rails with margin, while its −6 V VEBO allows safe biasing across common logic-level control signals.
The DFN1412D-3 package delivers 0.48 mm body height and 1.4 mm × 1.2 mm footprint, enabling high-density placement. Thermal resistance Rth(j-a) is 278 K/W on 70 µm FR4 copper, supporting continuous operation up to 150 °C junction temperature under defined PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum allowable collector-emitter voltage with base open; enables use in 24 V systems with safety margin |
| IC | −100 mA - Continuous DC collector current rating; suitable for driving LEDs, small relays, or logic-level translators |
| hFE | 420–800 @ VCE = −5 V, IC = −2 mA - High DC current gain reduces required base drive current in linear or saturated switching |
| VCE(sat) | −650 mV @ IC = −100 mA, IB = −5 mA - Low saturation voltage minimizes power loss and heating in on-state switching |
| Ptot | 450 mW @ Tamb ≤ 25 °C on 70 µm FR4 - Power dissipation capability sufficient for intermittent or low-duty-cycle loads |
| Tj(max) | 150 °C - Maximum junction temperature; supports operation in under-hood automotive environments |
Pinout & Package
DFN1412D-3 (SOT8009) is a 3-terminal, leadless, ultra-small plastic package with side-wettable flanks for automated optical inspection (AOI) of solder joints. Dimensions: 1.4 mm × 1.2 mm × 0.48 mm body height; 0.8 mm pitch; 0.5 mm max overall height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; reverse-biased relative to emitter to turn device ON in PNP configuration |
| 2 | Emitter (E) | Current source terminal; connected to higher potential rail (e.g., +12 V) in typical switching topology |
| 3 | Collector (C) | Current sink terminal; delivers load current to ground or lower-potential node when device is saturated |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Qualified for automotive applications per stress test standard, ensuring reliability in temperature-cycled, vibration-prone environments |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joint quality without X-ray, reducing post-reflow defect escape |
| 0.48 mm package height | Reduces board profile in ultra-thin modules such as ADAS sensors and infotainment displays |
| 278 K/W Rth(j-a) | Thermal resistance on 70 µm FR4 allows >300 mW dissipation at 70 °C ambient before reaching 150 °C junction limit |
Applications
| Automotive Door Module Switching | Low-Power Sensor Signal Conditioning |
|---|---|
Use Scenario: Controlling window lift motor enable lines and mirror fold/unfold actuators in door control units. IC Role / Device Role / Timing Role: PNP switch sourcing current from 12 V battery rail to activate low-side driver inputs or optocoupler LEDs. Use Value: −45 V VCEO withstands load-dump transients; AEC-Q101 compliance ensures 15-year field reliability in cyclic thermal environments. |
Use Scenario: Level-shifting and buffering analog outputs from MEMS pressure or temperature sensors to microcontroller ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance for signal integrity preservation. Use Value: hFE ≥ 420 ensures minimal base current draw (<5 µA), avoiding sensor output loading errors in µA-level precision circuits. |
| Portable Medical Device Power Sequencing | Industrial PLC Input Isolation Stage |
Use Scenario: Enabling/disabling power to Bluetooth LE radio modules and display backlights in handheld diagnostic tools. IC Role / Device Role / Timing Role: Low-quiescent-current PNP switch controlling VCC to downstream ICs during sleep/wake transitions. Use Value: −650 mV VCE(sat) limits dropout to <0.7 V at 100 mA, preserving >3.3 V rail margin for 3.3 V logic devices. |
Use Scenario: Optocoupler input stage in 24 V DC industrial digital input modules interfacing with field sensors. IC Role / Device Role / Timing Role: Current-limiting PNP driver delivering precise 5–10 mA LED forward current to ensure consistent optocoupler CTR. Use Value: Tight hFE bin (420–800) enables predictable base resistor selection without calibration, reducing BOM variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857C,215 (Nexperia) | Same die, but in SOT23 package (3.04 mm × 1.4 mm); no side-wettable flanks; Rth(j-a) = 348 K/W | Lacks AOI support and has 2.5× larger footprint; unsuitable for ultra-dense automotive PCBs | Select when legacy SOT23 reflow infrastructure exists and AOI is not required |
| MMBT3906LT1G (onsemi) | SOT23 package; VCEO = −40 V; hFE = 100–300 @ IC = −10 mA; not AEC-Q101 qualified | Lower voltage margin and gain; unqualified for automotive; higher VCE(sat) (−750 mV) | Select for cost-sensitive consumer-grade applications where AEC-Q101 and −45 V rating are unnecessary |
Compared with BC857C,215 and MMBT3906LT1G, BC857CQC-QZ uniquely combines AEC-Q101 qualification, side-wettable flanks for AOI, and high hFE in a 1.4 mm × 1.2 mm footprint-making it the only choice for next-generation automotive modules requiring zero-defect solder joint verification and thermal resilience.
Availability
BC857CQC-QZ is available at Aetrix Electronics and suitable for automotive door modules, portable medical diagnostics, industrial PLC inputs, and low-power sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for BC857CQC-QZ 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 discrete devices, logic ICs, and MOSFETs-with manufacturing rooted in process excellence and automotive-grade quality systems.
The BC857xQC-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for space-constrained, thermally demanding automotive and industrial signal-switching applications where AOI compatibility and long-term supply stability are mandatory.
FAQ
What is the maximum operating temperature for BC857CQC-QZ in continuous use?
The BC857CQC-QZ has a maximum junction temperature (Tj) of 150 °C and is rated for continuous operation up to 150 °C ambient when mounted on a 70 µm FR4 PCB with standard footprint. Derating begins above 25 °C ambient per Figure 1 in the datasheet, with usable power dropping to ~200 mW at 100 °C ambient.
Does BC857CQC-QZ support automatic optical inspection (AOI)?
Yes-its DFN1412D-3 (SOT8009) package features side-wettable flanks explicitly designed for reliable AOI of solder joints. This eliminates the need for X-ray inspection in high-volume automotive assembly, reducing test time and cost while improving defect detection accuracy for head-solder voids and insufficient wetting.
How does the hFE binning of BC857CQC-QZ compare to BC857BQC-Q?
BC857CQC-QZ has hFE = 420–800 at VCE = −5 V and IC = −2 mA, whereas BC857BQC-Q is binned 220–475. The 'C' grade provides higher and tighter current gain, enabling more predictable base resistor selection and lower base drive requirements in precision analog or low-power switching designs.
Can BC857CQC-QZ replace BC857C in existing SOT23 designs?
No-BC857CQC-QZ uses the DFN1412D-3 (SOT8009) package, which is physically incompatible with SOT23 footprints. It requires a new PCB layout with 0.8 mm pitch, side-wettable flank stencil design, and reflow profile optimized for leadless packages. Electrical characteristics are similar, but mechanical integration is not drop-in.
BC857CQC-QZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC857xQC-Q
- Package/Case:
- 3-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 360 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN1412D-3
BC857CQC-QZ FAQ
1.How can I place an order for BC857CQC-QZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857CQC-QZ 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 BC857CQC-QZ reliable?
The price and inventory of BC857CQC-QZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CQC-QZ is usually 5 days.
3.What payment methods are accepted for BC857CQC-QZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CQC-QZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857CQC-QZ?
BC857CQC-QZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857CQC-QZ 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 BC857CQC-QZ?
For technical support, including BC857CQC-QZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CQC-QZ requirements.
6.How does Aetrix verify that BC857CQC-QZ is sourced from the original manufacturer or authorized distributors?
All BC857CQC-QZ 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 BC857CQC-QZ meets industry standards.
7.What is the process for return or replacement of BC857CQC-QZ?
All BC857CQC-QZ units undergo pre-shipment inspection (PSI). If there is an issue with BC857CQC-QZ, 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 BC857CQC-QZ part is unused and in its original packaging.
Return procedure for BC857CQC-QZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857CQC-QZ Tags
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MMBT3906-7-F
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BC847B,215
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