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Diodes Incorporated BC857BWQ-13-F
- Part No.:
- BC857BWQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC857BWQ-13-F.pdf
- Description:
- TRANS PNP 45V 0.1A UMT3
- Quantity:
- Payment:
- Shipping:
Inventory:6,807
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Product details
Overview
BC857BWQ from Diodes Incorporated is a PNP small-signal transistor in SOT323 package, rated for -45V VCEO, -100mA continuous collector current, and VCE(sat) ≤ -650mV at -100mA/−5mA drive-designed for automotive-grade switching and audio-frequency amplification in space-constrained PCBs.
For engineers reviewing the BC857BWQ datasheet, BC857BWQ pinout, BC857BWQ application, or BC857BWQ equivalent, key selection criteria include AEC-Q101 qualification, low saturation voltage under high-current switching, DC current gain (hFE = 220–475 at −2mA), thermal resistance (RθJA = 625°C/W), and SOT323 lead-free, halogen-free "Green" compliance.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration in linear and saturated modes. Its BVCEO = −45V and BVCBO = −50V support robust blocking in low-voltage control rails, while fT = 100–200MHz enables stable AF amplification up to ~100kHz with predictable gain roll-off.
Designed for automotive applications, it features pulsed-parameter validation (duty cycle ≤2%, pulse width ≤300µs), J-STD-020 Level 1 moisture sensitivity, and IATF16949-certified manufacturing-ensuring reliability under thermal cycling (−55°C to +150°C) and mechanical stress in engine bay or cabin modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45V: Maximum safe collector-emitter voltage before breakdown in common-emitter configuration. |
| IC (continuous) | −100mA: Continuous DC collector current rating; supports load switching up to ~100mA without derating at 25°C. |
| VCE(sat) | −650mV @ −100mA/−5mA: Low on-state voltage drop ensures <0.065W conduction loss at full rated current. |
| hFE | 220–475 @ VCE = −5V, IC = −2mA: High DC gain enables low-base-drive current in amplifier and switch bias networks. |
| fT | 100–200MHz: Gain-bandwidth product confirms usable small-signal amplification up to mid-AF range with stable phase margin. |
| RθJA | 625°C/W: Thermal resistance on minimal FR4 pad layout; requires careful thermal design above ~100mW dissipation. |
| PD | 200mW: Absolute maximum power dissipation at 25°C ambient; derates linearly to zero at ~150°C case temperature. |
Pinout & Package
SOT323 surface-mount plastic package: 3-terminal, ultra-compact (2.2 × 1.35 × 0.95 mm), matte tin-plated leads, UL 94V-0 rated molding compound, weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink terminal; connected to ground or lower-potential rail in PNP switch/amplifier configurations. |
| 2 (Base) | B | Control input; requires negative bias relative to emitter to turn on; typical drive current −0.5mA to −5mA. |
| 3 (Collector) | C | Current source terminal; delivers controlled current to load when saturated; reverse-biased during cutoff. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use with PPAP capability and IATF16949 manufacturing-enables direct integration into ASIL-B supporting subsystems. |
| Low VCE(sat) | ≤ −650mV at −100mA ensures <65mW conduction loss, reducing thermal load in high-duty-cycle switching nodes. |
| Halogen- & antimony-free "Green" | Meets Diodes' definition: Br & Cl <900ppm each (<1500ppm total), Sb <1000ppm-supports eco-compliance in EU and global markets. |
| J-STD-020 Level 1 MSL | No floor-life limitation; can be mounted directly after unpacking without baking-reduces SMT line overhead. |
Applications
| Automotive Door Module Switching | Infotainment System Audio Preamp |
|---|---|
Use Scenario: Driving window lift motor relays and LED status indicators in door control units. IC Role / Device Role / Timing Role: PNP switch controlling 12V loads with logic-level base drive from MCU GPIO. Use Value: −650mV VCE(sat) minimizes heat generation in sealed module enclosures; AEC-Q101 qualification ensures field reliability over 15-year vehicle life. | Use Scenario: Low-noise voltage amplification stage for analog audio inputs (e.g., AUX, Bluetooth DAC output). IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with hFE = 290 typ. at −2mA, biased for Class-A operation. Use Value: NF = 10dB @ 1kHz/200Hz bandwidth enables clean signal gain without audible hiss; fT >100MHz provides headroom for transient fidelity. |
| Industrial Sensor Signal Conditioning | Consumer Appliance Power Sequencing |
Use Scenario: Amplifying millivolt-level thermistor or bridge sensor outputs in PLC I/O modules. IC Role / Device Role / Timing Role: DC-coupled gain stage with VBE(on) = −650mV typ., enabling precise biasing with low-offset op-amps. Use Value: Tight hFE spread (220–475) allows consistent gain calibration across production batches; −5V VEBO rating protects against ESD-induced base-emitter junction failure. | Use Scenario: Enabling/disabling 5V or 3.3V rails in smart home hubs using MCU-controlled PNP high-side switches. IC Role / Device Role / Timing Role: Saturated PNP switch with base resistor network providing fast turn-on/turn-off (ton/toff <100ns typical). Use Value: −45V VCEO withstands load-dump transients; SOT323 footprint saves board area in multi-rail PMIC sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857B,115 (Nexperia) | Same SOT323 package, hFE = 200–450, VCEO = −45V, but not AEC-Q101 qualified; RoHS-compliant only (no halogen-free claim). | Lacks automotive change control, PPAP, and IATF16949 traceability-suitable for industrial or consumer, not safety-critical automotive. | Select when cost or non-automotive volume drives sourcing, and AEC-Q101 is not mandated. |
| MMBT857LT1G (ON Semiconductor) | SOT-23 package (larger footprint), VCEO = −45V, hFE = 200–450, AEC-Q101 qualified, but RθJA = 357°C/W (better thermal performance) and VCE(sat) = −700mV @ −100mA (slightly higher loss). | SOT-23 requires different land pattern; higher thermal efficiency suits higher-power variants; same automotive compliance. | Choose when board layout allows SOT-23 and thermal margin is tighter than voltage drop priority. |
Compared with BC857B,115, BC857BWQ adds halogen-free compliance and automotive traceability without sacrificing electrical specs; versus MMBT857LT1G, it trades thermal advantage for smaller footprint and lower saturation voltage-making it optimal for space-constrained AEC-Q101 designs where <650mV VCE(sat) is critical.
Availability
BC857BWQ is available at Aetrix Electronics and suitable for automotive door modules, infotainment preamplifiers, industrial sensor interfaces, and consumer appliance power sequencing requiring stable component supply and long-term lifecycle assurance.
Supply support for BC857BWQ 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BC857BWQ belongs to Diodes' automotive-qualified small-signal transistor product line, engineered specifically for reliable switching and amplification in harsh-environment electronic control units under AEC-Q101 stress testing protocols.
FAQ
Is BC857BWQ pin-compatible with BC847BW?
No. BC857BWQ is a PNP transistor with emitter-base-collector (E-B-C) pinout in SOT323, while BC847BW is an NPN device with collector-base-emitter (C-B-E) order. Swapping them causes circuit failure due to reversed polarity and gain direction. Always verify pin assignment using the top-view diagram in DS43349.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak pulse base current is −200mA, but for continuous DC operation, base current must be limited to maintain IC ≤ −100mA and junction temperature within −55°C to +150°C. At IC = −100mA and hFE min = 220, IB ≥ −455µA is required; practical design uses −5mA to ensure saturation, well within safe limits given the −200mA pulse rating.
Does BC857BWQ support reflow soldering per J-STD-020?
Yes. With J-STD-020 Level 1 moisture sensitivity rating, BC857BWQ may be subjected to standard Pb-free reflow profiles (e.g., IPC/JEDEC J-STD-020D) without preconditioning or baking. Peak temperature must not exceed 260°C, and time above 217°C should be 60–150 seconds per JEDEC specifications.
Can BC857BWQ replace BC857C in existing designs?
Only if hFE tolerance is acceptable. BC857BWQ is Group B (hFE = 220–475), while BC857C is Group C (hFE = 420–800). Substitution may cause gain-dependent instability in amplifier circuits or insufficient drive in saturated switches. Verify bias point and saturation margin with worst-case hFE values before redesign.
BC857BWQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- 220 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UMT3
BC857BWQ-13-F FAQ
1.How can I place an order for BC857BWQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857BWQ-13-F 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 BC857BWQ-13-F reliable?
The price and inventory of BC857BWQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857BWQ-13-F is usually 5 days.
3.What payment methods are accepted for BC857BWQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857BWQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857BWQ-13-F?
BC857BWQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857BWQ-13-F 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 BC857BWQ-13-F?
For technical support, including BC857BWQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857BWQ-13-F requirements.
6.How does Aetrix verify that BC857BWQ-13-F is sourced from the original manufacturer or authorized distributors?
All BC857BWQ-13-F 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 BC857BWQ-13-F meets industry standards.
7.What is the process for return or replacement of BC857BWQ-13-F?
All BC857BWQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BC857BWQ-13-F, 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 BC857BWQ-13-F part is unused and in its original packaging.
Return procedure for BC857BWQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857BWQ-13-F Tags
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