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Nexperia USA Inc. BC857BM,315
- Part No.:
- BC857BM,315
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-101, SOT-883
- Datasheet:
-
BC857BM,315.pdf
- Description:
- TRANS PNP 45V 0.1A SOT-883
- Quantity:
- Payment:
- Shipping:
Inventory:12,770
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Product details
Overview
BC857BM,315 from Nexperia is a PNP general purpose transistor in SOT883 ultra-small leadless package (1.0 × 0.6 × 0.5 mm), rated for −45 V VCEO, −100 mA IC (DC), and 220–475 hFE at −5 V VCE/−2 mA IC; used in biasing, switching, and signal amplification stages of portable consumer electronics.
For engineers reviewing the BC857BM,315 datasheet, BC857BM,315 pinout, BC857BM,315 application, or BC857BM,315 equivalent, this page delivers verified package dimensions, thermal resistance (290 K/W on FR4), saturation voltage (≤ −200 mV at IC = −10 mA/IB = −0.5 mA), noise figure (≤10 dB), and complementary NPN pairing with BC847M series.
Technical Context
This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with DC current gain tightly binned (220–475) and low base-emitter saturation voltage (≤ −820 mV at IC = −10 mA). Its SOT883 footprint enables high-density routing in space-constrained PCBs while maintaining thermal performance comparable to SOT23 via optimized copper pad layout.
Designed for low-to-medium frequency analog and digital switching, it supports stable operation from −65 °C to +150 °C ambient, with collector-base leakage ≤ −15 nA at −30 V and transition frequency fT ≥ 100 MHz - enabling use in audio preamps, LED drivers, and logic-level translation circuits up to ~50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V: Maximum safe collector-emitter voltage before breakdown in open-base configuration. |
| IC (DC) | −100 mA: Continuous collector current handling capacity under steady-state bias conditions. |
| hFE | 220–475 at VCE = −5 V, IC = −2 mA: Confirmed DC current gain range for reliable small-signal amplification design margin. |
| VCE(sat) | ≤ −200 mV at IC = −10 mA, IB = −0.5 mA: Low saturation voltage ensures minimal power loss in switching applications. |
| fT | ≥ 100 MHz: Minimum transition frequency enabling usable gain up to medium-frequency AC signal paths. |
| Rth(j-a) | 290 K/W on FR4 with 1 cm² collector pad: Thermal resistance defining junction-to-ambient temperature rise per watt dissipated. |
| Cc | ≤ 2.5 pF at VCB = −10 V, f = 1 MHz: Collector capacitance limiting high-frequency Miller effect in amplifier stages. |
Pinout & Package
SOT883 is a leadless ultra-small plastic package (1.0 × 0.6 × 0.5 mm) with three solder lands; board space requirement is 1.3 × 0.9 mm. Mounting requires precise stencil and reflow profile due to absence of leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to turn on. |
| 2 | Emiter | Current source terminal in PNP configuration; connected to higher potential rail in typical common-emitter switch layouts. |
| 3 | Collector | Current sink terminal; electrically tied to load or next stage input; thermal pad area optimized for heat conduction in SOT883. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOT883 footprint | 1.0 × 0.6 × 0.5 mm body with 1.3 × 0.9 mm board area - enables >3× component density vs. SOT23 in portable PCBs. |
| High hFE binning (220–475) | Narrow DC gain spread reduces need for external feedback trimming in bias-sensitive amplifier designs. |
| Low VBE(sat) | ≤ −820 mV at IC = −10 mA ensures predictable base drive requirements and stable turn-on threshold across temperature. |
| Thermal performance parity with SOT23 | 430 mW Ptot at Tamb ≤ 25 °C with 1 cm² collector pad - matches legacy SOT23 power handling despite smaller size. |
Applications
| Mobile Phone Front-End Biasing | Digital Camera Flash Control |
|---|---|
Use Scenario: Providing stable base bias to RF power amplifier transistors in GSM/UMTS handset front-end modules. IC Role / Device Role / Timing Role: PNP current source for active bias network ensuring Class-A/AB operation under varying supply and temperature. Use Value: Tight hFE binning and low VCE(sat) minimize quiescent current drift and improve PA efficiency stability over −30 °C to +85 °C. |
Use Scenario: Switching high-current white LEDs during camera flash bursts in compact digital still cameras. IC Role / Device Role / Timing Role: Low-side PNP switch controlling LED anode current path via emitter-follower configuration. Use Value: 200 mA ICM peak rating and ≤ −400 mV VCE(sat) at IC = −100 mA enable fast, low-loss flash activation without thermal derating. |
| PCMCIA Card Level-Shifting | Wearable Sensor Signal Conditioning |
Use Scenario: Translating 3.3 V logic signals to 5 V domains in legacy PCMCIA peripheral cards with mixed-voltage interfaces. IC Role / Device Role / Timing Role: PNP-based level shifter operating in common-emitter mode with pull-up resistor network. Use Value: −45 V VCEO and −50 V VCBO provide robust isolation margin against bus transients and ESD events on hot-plug interfaces. |
Use Scenario: Amplifying microvolt-level output from MEMS accelerometers or biopotential electrodes in hearables and fitness trackers. IC Role / Device Role / Timing Role: First-stage PNP common-collector amplifier providing high-input impedance and low-noise buffering. Use Value: ≤10 dB noise figure at 1 kHz and 2 kΩ source resistance preserves SNR in battery-powered sensor front-ends with limited gain budget. |
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 | SOT323 package (2.1 × 1.25 × 0.95 mm); higher Rth(j-a) (350 K/W); same hFE bin and VCEO. | Larger footprint eases hand-soldering but reduces board density; less suitable for ultra-thin mobile modules. | Select when manual assembly or thermal testing on non-optimized pads is required. |
| MMBT3906LT1G | SOT23 package; wider hFE range (100–300); slightly higher VCE(sat) (≤ −400 mV at IC/IB = 10). | Proven reliability in industrial control boards; lower fT (250 MHz min) limits high-frequency linearity. | Select when legacy SOT23 compatibility or extended qualification history in automotive ECUs is prioritized. |
Compared with BC857BW,115 and MMBT3906LT1G, the BC857BM,315 offers superior board-area efficiency and tighter hFE control-critical for miniaturized consumer devices where trace routing and thermal management are constrained by mechanical form factor.
Availability
BC857BM,315 is available at Aetrix Electronics and suitable for mobile communications, digital camera flash control, and wearable sensor signal conditioning requiring stable component supply across production ramp and long-term maintenance cycles.
Supply support for BC857BM,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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The BC857M series belongs to Nexperia's general-purpose transistor product line, engineered specifically for space-constrained, battery-powered consumer electronics demanding high reliability and consistent parametric performance.
FAQ
Is BC857BM,315 RoHS compliant and halogen-free?
Yes. BC857BM,315 meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The SOT883 package uses lead-free matte tin plating and green molding compound, with full compliance documentation available through Nexperia's product change notifications.
What is the recommended PCB footprint for SOT883 mounting?
The official Nexperia footprint for SOT883 specifies 0.55 mm pad width, 0.62 mm pad length, 0.47 mm center-to-center spacing, and 0.30 mm solder mask opening. A 1 cm² copper pour under the collector land (Pin 3) is required to achieve the 290 K/W thermal resistance rating on FR4.
Can BC857BM,315 replace BC857B in existing SOT23 designs?
No direct replacement: BC857BM,315 uses SOT883 (leadless), while BC857B uses SOT23 (leaded). Pinout differs (SOT883: 1=Base, 2=Emitter, 3=Collector; SOT23: 1=Emitter, 2=Base, 3=Collector), and thermal/mechanical behavior is not interchangeable without PCB redesign and requalification.
What is the maximum allowable reflow peak temperature for BC857BM,315?
BC857BM,315 is rated for JEDEC J-STD-020D-compliant reflow with a peak temperature of 260 °C for ≤ 30 seconds. The device uses MSL1 moisture sensitivity level packaging, eliminating bake requirements prior to assembly when stored per Nexperia's humidity guidelines.
BC857BM,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-101, SOT-883
- 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:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 220 @ 2mA, 5V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-883
BC857BM,315 FAQ
1.How can I place an order for BC857BM,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857BM,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 BC857BM,315 reliable?
The price and inventory of BC857BM,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857BM,315 is usually 5 days.
3.What payment methods are accepted for BC857BM,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857BM,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857BM,315?
BC857BM,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857BM,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 BC857BM,315?
For technical support, including BC857BM,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857BM,315 requirements.
6.How does Aetrix verify that BC857BM,315 is sourced from the original manufacturer or authorized distributors?
All BC857BM,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 BC857BM,315 meets industry standards.
7.What is the process for return or replacement of BC857BM,315?
All BC857BM,315 units undergo pre-shipment inspection (PSI). If there is an issue with BC857BM,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 BC857BM,315 part is unused and in its original packaging.
Return procedure for BC857BM,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857BM,315 Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
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MMBT2222A-7-F
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BC846BLT1G
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBTA06LT1G
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