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Nexperia USA Inc. BC857AMB,315
- Part No.:
- BC857AMB,315
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XFDFN
- Datasheet:
-
BC857AMB,315.pdf
- Description:
- TRANS PNP 45V 0.1A DFN1006B-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,370
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Product details
Overview
BC857AMB,315 from Nexperia is a PNP general-purpose transistor in an ultra-small leadless SOT883B package, rated for −45 V VCEO, −100 mA IC, and DC current gain (hFE) of 125–250 at −5 V VCE/−2 mA IC. It serves as a compact switching or amplification device in space-constrained mobile power management and signal conditioning circuits.
For engineers reviewing the BC857AMB,315 datasheet, BC857AMB,315 pinout, BC857AMB,315 application, or BC857AMB,315 equivalent, this part supports AEC-Q101-qualified automotive subsystems, low-height portable electronics, and high-density PCB designs requiring verified thermal resistance (Rth(j-a) = 500 K/W) and reflow-only assembly compatibility.
Technical Context
This discrete PNP bipolar junction transistor operates with open-base collector-emitter breakdown voltage of −45 V and emitter-base breakdown of −5 V, enabling robust biasing in negative-rail signal paths. Its −200 mV VCE(sat) at −10 mA IC/−0.5 mA IB ensures low conduction loss in switching configurations.
The device delivers 100 MHz fT at −5 V VCE/−10 mA IC, supporting audio-frequency amplification and moderate-speed digital logic interfacing. With 2.5 pF Cc and 10 dB noise figure at 1 kHz, it balances bandwidth, noise, and stability in low-power analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V - Maximum safe collector-emitter voltage with base open; defines rail tolerance in high-side PNP switch applications. |
| IC | −100 mA - Continuous collector current rating; sets maximum load drive capability in linear or saturated operation. |
| hFE | 125–250 - DC current gain range at −5 V VCE/−2 mA IC; determines required base drive for predictable saturation in switching circuits. |
| VCE(sat) | −200 mV - Collector-emitter saturation voltage at −10 mA IC/−0.5 mA IB; directly impacts power loss and heating in on-state operation. |
| Rth(j-a) | 500 K/W - Junction-to-ambient thermal resistance on FR4 PCB; informs derating requirements for sustained 250 mW power dissipation. |
| fT | 100 MHz - Transition frequency at −5 V VCE/−10 mA IC; enables use in audio amplifiers and low-speed digital buffers. |
| Cc | 2.5 pF - Collector capacitance at −10 V VCB; limits high-frequency gain roll-off and affects stability in RF-adjacent stages. |
Pinout & Package
SOT883B is a leadless ultra-small surface-mount plastic package measuring 1.0 × 0.6 × 0.37 mm, with 3 solder lands and a low profile optimized for automated reflow assembly on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased PNP operation; requires negative current injection relative to emitter to enable conduction. |
| 2 | Emiter | Current source terminal in PNP configuration; connected to higher potential rail (e.g., VCC) in common-emitter switches. |
| 3 | Collector | Current sink terminal; delivers controlled output current to load when base is biased, with polarity inverted relative to NPN devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress per discrete semiconductor standard. |
| Leadless SOT883B footprint | Enables PCB area reduction >60% vs. SOT23 while maintaining comparable power dissipation (250 mW), critical for wearable and IoT modules. |
| 0.37 mm package height | Supports ultra-thin end products such as slim smartphones and medical patches where Z-axis clearance is constrained. |
| Reflow-only soldering | Eliminates wave soldering compatibility concerns; ensures consistent joint formation using industry-standard Pb-free reflow profiles. |
Applications
| Mobile Power Switching | Automotive LED Driver |
|---|---|
Use Scenario: Low-voltage battery-powered smartphone subsystems requiring compact load switching for display backlight or sensor power rails. IC Role / Device Role / Timing Role: PNP transistor configured as high-side switch controlling current flow from battery to load. Use Value: Ultra-low package height (0.37 mm) preserves thin form factor; −200 mV VCE(sat) minimizes voltage drop and extends battery runtime. |
Use Scenario: On-board LED indicator circuits in automotive instrument clusters and door modules operating across −40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: General-purpose PNP switch driving 20 mA LED strings from 5 V or 12 V supply rails. Use Value: AEC-Q101 qualification ensures long-term reliability under thermal cycling; −45 V VCEO provides margin against load-dump transients. |
| Portable Audio Amplifier | Industrial Sensor Interface |
Use Scenario: Input stage preamplifier in Bluetooth earbuds and hearing aids where low noise and small size are mandatory. IC Role / Device Role / Timing Role: Small-signal PNP amplifier providing voltage gain with minimal distortion in Class-A configuration. Use Value: 10 dB noise figure at 1 kHz and 100 MHz fT support clean audio signal integrity; 2.5 pF Cc avoids high-frequency peaking. |
Use Scenario: Level-shifting and signal inversion in factory automation sensors interfacing with 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Discrete PNP inverter translating 5 V logic outputs to 3.3 V-compatible inputs. Use Value: Guaranteed hFE range (125–250) ensures stable gain across production lots; −5 V VEBO withstands ESD events during handling. |
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 |
|---|---|---|---|
| BC857BMB,315 | Higher hFE range (220–475) at same VCE/IC test conditions; otherwise identical ratings and package. | Better suited for low-base-drive applications like high-gain sensor amplifiers where precise current mirroring is needed. | Select when higher DC gain reduces base resistor count or improves loop stability in feedback circuits. |
| BC847AMB,315 | NPN complement with matching VCEO (45 V), IC (100 mA), hFE (125–250), and SOT883B package; polarity inverted. | Used in complementary push-pull stages or NPN-biased logic interfaces where sourcing (not sinking) current is required. | Choose for NPN topology compatibility; pinout differs (base/emitter/collector order reversed), requiring layout revision. |
Compared with BC857BMB,315, the BC857AMB,315 offers lower and more tightly bounded gain-reducing sensitivity to temperature drift in precision bias networks. Versus BC847AMB,315, it provides complementary PNP functionality essential for high-side switching and level inversion where NPN cannot be substituted without circuit redesign.
Availability
BC857AMB,315 is available at Aetrix Electronics and suitable for mobile power switching, automotive LED driver circuits, portable audio amplifiers, and industrial sensor interface designs requiring stable component supply and AEC-Q101-compliant performance.
Supply support for BC857AMB,315 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 components and advanced packaging technologies.
The BC857xMB series targets space-constrained, thermally sensitive applications in automotive, mobile, and industrial markets-designed specifically to deliver AEC-Q101 reliability in ultra-miniature SOT883B packages without sacrificing electrical performance.
FAQ
Is BC857AMB,315 compatible with lead-free reflow soldering processes?
Yes. The BC857AMB,315 is qualified for reflow-only soldering per J-STD-020, with peak temperatures up to 260 °C. Its SOT883B package uses matte tin terminations and is fully compatible with standard Pb-free reflow profiles, including ramp-soak-reflow cycles. Wave soldering is not recommended.
What is the maximum allowable junction temperature for continuous operation?
The absolute maximum junction temperature (Tj) is 150 °C. For continuous operation at full 250 mW power dissipation, ambient temperature must be limited to ≤25 °C due to Rth(j-a) = 500 K/W. Derating is required above 25 °C ambient-e.g., max power drops to ~125 mW at 75 °C ambient.
How does the binary marking code '0100 0100' identify BC857AMB,315?
The top-side marking '0100 0100' corresponds to the SOT883B binary code for BC857AMB per Nexperia's specification. The first four bits '0100' denote the BC857 series, and the last four '0100' specify the 'A' gain bin (125–250 hFE). This code is laser-etched and read left-to-right with pin 1 indicated by a triangle or notch.
Can BC857AMB,315 replace BC857BW in SOT323 packages?
No. Although electrically similar, BC857AMB,315 uses the SOT883B package (1.0 × 0.6 × 0.37 mm), while BC857BW uses SOT323 (2.1 × 1.25 × 1.1 mm). Footprint, thermal behavior (Rth(j-a) differs), and soldering process compatibility are not interchangeable-PCB layout and reflow profile must be redesigned.
BC857AMB,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-XFDFN
- 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:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006B-3
BC857AMB,315 FAQ
1.How can I place an order for BC857AMB,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857AMB,315 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 BC857AMB,315 reliable?
The price and inventory of BC857AMB,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857AMB,315 is usually 5 days.
3.What payment methods are accepted for BC857AMB,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857AMB,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857AMB,315?
BC857AMB,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857AMB,315 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 BC857AMB,315?
For technical support, including BC857AMB,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857AMB,315 requirements.
6.How does Aetrix verify that BC857AMB,315 is sourced from the original manufacturer or authorized distributors?
All BC857AMB,315 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 BC857AMB,315 meets industry standards.
7.What is the process for return or replacement of BC857AMB,315?
All BC857AMB,315 units undergo pre-shipment inspection (PSI). If there is an issue with BC857AMB,315, 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 BC857AMB,315 part is unused and in its original packaging.
Return procedure for BC857AMB,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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