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Nexperia USA Inc. BC857AW,115
- Part No.:
- BC857AW,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC857AW,115.pdf
- Description:
- TRANS PNP 45V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:10,094
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Product details
Overview
BC857AW,115 from Nexperia is a PNP general-purpose bipolar junction transistor in SOT323 (SC-70) package, rated for −45 V VCEO, −100 mA IC, and DC current gain (hFE) of 125–250 at VCE = −5 V and IC = −2 mA. It serves as a low-voltage, low-current switching or amplification device in compact consumer and industrial signal-path circuits.
For engineers reviewing the BC857AW,115 datasheet, BC857AW,115 pinout, BC857AW,115 application, or BC857AW,115 equivalent, key selection criteria include its SC-70 footprint compatibility, guaranteed hFE range, VCEO rating for 3.3 V/5 V rail-referenced designs, and thermal resistance (Rth(j-a) = 625 K/W) on standard FR4 PCBs.
Technical Context
This PNP BJT operates with emitter-grounded configuration in linear or saturated switching modes. Its base-emitter saturation voltage (VBEsat) is −850 mV max at IC = −100 mA / IB = −5 mA, and collector-emitter saturation voltage (VCEsat) is −250 mV max under the same conditions - enabling efficient low-side switch control in discrete logic interfaces.
The device exhibits fT = 100 MHz at VCE = −5 V and IC = −10 mA, supporting audio-frequency amplification and moderate-speed digital switching. Its Cc = 3 pF and Ce = 12 pF capacitances define bandwidth limits in high-gain small-signal stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-to-emitter voltage with open base; defines rail tolerance in 3.3 V/5 V systems. |
| IC | −100 mA - Continuous DC collector current limit; supports LED drivers and relay coil interfaces. |
| hFE | 125–250 @ VCE = −5 V, IC = −2 mA - Guaranteed DC current gain range for predictable base drive sizing. |
| VCEsat | −250 mV max @ IC = −100 mA, IB = −5 mA - Low saturation voltage minimizes power loss in switching applications. |
| Rth(j-a) | 625 K/W - Thermal resistance from junction to ambient on standard FR4 PCB; informs derating above 25 °C ambient. |
| fT | 100 MHz - Transition frequency sets upper usable bandwidth for small-signal amplification. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-lead single-row layout with gull-wing terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive to bias transistor into active or saturation region. |
| 2 | Emitter (E) | Current source terminal in PNP operation; typically tied to higher potential (e.g., VCC). |
| 3 | Collector (C) | Output terminal; sinks current to load when transistor is on; connected to load return path. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT package | SOT323 footprint enables high-density routing on space-constrained PCBs without through-hole assembly. |
| Guaranteed hFE binning | 125–250 range ensures consistent base drive requirements across production lots for reliable circuit design. |
| Low VCEsat | ≤ −250 mV at full rated current reduces conduction loss in battery-powered or thermally sensitive applications. |
| High fT | 100 MHz transition frequency supports stable gain up to ~10 MHz in common-emitter amplifier configurations. |
Applications
| LED Driver Circuit | Level-Shifting Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller GPIO pins with inverted logic. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode, sourcing current from VCC to LED anode while sinking cathode current to ground via MCU output. Use Value: −250 mV VCEsat ensures <1 mW dissipation per LED channel, minimizing thermal impact on adjacent components. |
Use Scenario: Translating 1.8 V logic-high signals to 5 V rail for legacy peripherals in mixed-voltage systems. IC Role / Device Role / Timing Role: Discrete level shifter using emitter-follower configuration with base driven by low-voltage logic and emitter referenced to 5 V. Use Value: 125–250 hFE guarantees sufficient current gain to maintain output swing within 0.7 V of 5 V rail under 1 mA load. |
| Audio Pre-amplifier Stage | Power Sequencing Control |
Use Scenario: Low-noise voltage amplification of microphone signals in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter amplifier biased at IC = −2 mA, leveraging 100 MHz fT and 2 dB noise figure at 1 kHz. Use Value: 3 pF collector capacitance preserves high-frequency response up to 20 kHz without external compensation. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., sensor bias supplies) during system boot-up sequences. IC Role / Device Role / Timing Role: High-side switch controlling PMOS gate drive, where BC857AW turns on/off the gate pull-down path. Use Value: −45 V VCEO rating safely accommodates transient overshoot on 24 V auxiliary rails during sequencing events. |
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 |
|---|---|---|---|
| BC857BW,115 | hFE = 220–475 (higher gain, tighter spread); identical VCEO, IC, and package. | Better suited for low-base-drive applications like high-impedance sensor interfaces where precise gain control is critical. | Select BC857BW when base current budget is constrained and higher hFE improves noise immunity. |
| BC847AW,115 | NPN complement; same hFE range (125–250), VCEO = +45 V, identical SOT323 package and pinout. | Used in low-side switching or NPN amplifier topologies requiring polarity inversion relative to BC857AW. | Choose BC847AW for complementary NPN roles in push-pull stages or when sourcing current from ground is preferred. |
Compared with BC857BW,115, the BC857AW,115 offers lower and wider hFE tolerance ideal for cost-sensitive designs where base drive margin exists; versus BC847AW,115, it provides PNP functionality essential for high-side switching and rail-referenced biasing not achievable with NPN topology.
Availability
BC857AW,115 is available at Aetrix Electronics and suitable for LED driver circuits, level-shifting interfaces, audio pre-amplifier stages, and power sequencing control requiring stable component supply and consistent SOT323 packaging.
Supply support for BC857AW,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-qualified and industrial-grade components.
The BC857AW belongs to Nexperia's BC846–BC858W series of general-purpose transistors designed for cost-effective, space-efficient switching and amplification in consumer, computing, and industrial electronics.
FAQ
What is the maximum operating temperature for BC857AW,115?
The BC857AW,115 has a maximum junction temperature (Tj) of 150 °C and storage temperature range of −65 °C to +150 °C. Its thermal resistance Rth(j-a) is 625 K/W on standard FR4 PCB, so continuous operation above 25 °C ambient requires derating IC per the datasheet's thermal curves to avoid exceeding Tj.
Does BC857AW,115 support reflow soldering?
Yes - BC857AW,115 is qualified for lead-free reflow soldering per JEDEC J-STD-020. The recommended reflow profile uses a peak temperature of 260 °C for ≤30 seconds, with ramp rates and soak times aligned to SOT323 thermal mass. Figure 15 in the datasheet provides the exact solder land pattern and stencil aperture dimensions.
How does BC857AW,115 differ from BC857W,115?
BC857AW,115 has a guaranteed hFE range of 125–250 at VCE = −5 V and IC = −2 mA, whereas BC857W,115 specifies hFE = 125–800. The 'A' suffix denotes tighter DC current gain binning, improving predictability in base-resistor-driven circuits without requiring gain feedback or trimming.
Can BC857AW,115 replace BC856AW,115 in existing designs?
No - BC856AW,115 is rated for −65 V VCEO, while BC857AW,115 is rated for −45 V. Substituting BC857AW,115 in a −65 V application risks premature breakdown. However, if the actual collector-emitter voltage remains ≤−45 V and hFE requirements align, mechanical and electrical compatibility (same SOT323 package, pinout, and marking code 3E%) allows drop-in replacement.
BC857AW,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC857AW,115 FAQ
1.How can I place an order for BC857AW,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857AW,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 BC857AW,115 reliable?
The price and inventory of BC857AW,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857AW,115 is usually 5 days.
3.What payment methods are accepted for BC857AW,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857AW,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857AW,115?
BC857AW,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857AW,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 BC857AW,115?
For technical support, including BC857AW,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857AW,115 requirements.
6.How does Aetrix verify that BC857AW,115 is sourced from the original manufacturer or authorized distributors?
All BC857AW,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 BC857AW,115 meets industry standards.
7.What is the process for return or replacement of BC857AW,115?
All BC857AW,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC857AW,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 BC857AW,115 part is unused and in its original packaging.
Return procedure for BC857AW,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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