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Nexperia USA Inc. BC857AM,315
- Part No.:
- BC857AM,315
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-101, SOT-883
- Datasheet:
-
BC857AM,315.pdf
- Description:
- TRANS PNP 45V 0.1A SOT-883
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
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Product details
Overview
BC857AM,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, and DC current gain hFE of 125–250 at −2 mA/−5 V. It serves as a compact, low-power switching and amplification device in space-constrained portable electronics such as digital cameras and PCMCIA cards.
For engineers reviewing the BC857AM,315 datasheet, BC857AM,315 pinout, BC857AM,315 application, or BC857AM,315 equivalent, key selection criteria include its PNP polarity, SOT883 footprint compatibility, −200 mV VCEsat at −10 mA/−0.5 mA drive, 100 MHz fT, and thermal resistance of 500 K/W in free air - critical for thermally sensitive mobile and wearable designs.
Technical Context
This device operates as a discrete PNP bipolar junction transistor optimized for low-voltage, medium-frequency linear and switching functions. Its design supports stable DC biasing with hFE tolerance tightly binned (125–250), low base-emitter voltage (−600 to −750 mV at −2 mA), and controlled saturation behavior (VCEsat ≤ −200 mV).
The SOT883 package enables high-density PCB layouts while maintaining thermal performance comparable to SOT23 via optimized copper pad layout (1 cm² collector pad). Its −5 V VEBO and −50 V VCBO ratings support robust operation in mixed-signal interfaces where emitter-referenced biasing or reverse-base stress may occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V: Maximum safe collector-emitter voltage under open-base condition; defines upper rail limit in PNP switch or amplifier stages. |
| IC (DC) | −100 mA: Continuous collector current capability; suitable for driving LEDs, small relays, or logic-level signal inversion. |
| hFE | 125–250 @ −2 mA/−5 V: Tight DC current gain bin ensures predictable base drive requirements and consistent switching thresholds. |
| VCEsat | ≤ −200 mV @ −10 mA/−0.5 mA: Low saturation voltage minimizes power loss and heat generation in active-low switching applications. |
| fT | 100 MHz: Transition frequency supports reliable operation up to medium-frequency AC signal amplification (e.g., audio preamp, RF bias networks). |
| Ptot | 250 mW @ Tamb ≤ 25 °C: Power dissipation limit governs thermal derating in unheatsinked surface-mount layouts. |
| Rth(j-a) | 500 K/W in free air: Junction-to-ambient thermal resistance informs board-level thermal design for ambient temperature margins. |
Pinout & Package
SOT883 is a leadless ultra-small plastic package (1.0 × 0.6 × 0.5 mm) with three solder lands on the bottom surface. It requires precise stencil design and reflow profiling due to its 0.47 mm pitch and absence of gull-wing 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 | Emitter | Current source terminal in PNP configuration; typically tied to higher potential (e.g., VCC) in common-emitter switches. |
| 3 | Collector | Current sink terminal; connects to load or lower-potential node; designed for 1 cm² copper pad to achieve 430 mW Ptot rating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOT883 footprint | 1.3 × 0.9 mm board area - enables >3× higher component density than SOT23 in portable PCBs. |
| Low VBE variation | −600 to −750 mV @ −2 mA - reduces base resistor tolerance sensitivity and improves bias stability across temperature. |
| Binned hFE range | 125–250 (BC857AM grade) - allows deterministic base drive calculation without margining for gain spread. |
| High fT / low Cc | 100 MHz fT with ≤2.5 pF collector capacitance - supports clean signal integrity in 10–50 MHz clock buffering or RF detector circuits. |
| Robust ESD rating | Class 3B HBM per JESD22-A114 (≥8 kV) - verified per Nexperia standard qualification, reducing need for external protection in handheld interfaces. |
Applications
| Mobile Camera Autofocus Driver | Digital Audio Signal Inverter |
|---|---|
Use Scenario: Driving voice-coil motor (VCM) focus actuators in compact smartphone camera modules requiring fast, low-power bidirectional control. IC Role / Device Role / Timing Role: PNP switch in half-H-bridge configuration, enabling emitter-follower current sourcing to VCM coil during focus ramp-up. Use Value: −200 mV VCEsat minimizes coil heating during sustained focus hold; SOT883 size fits within tight lens barrel PCB real estate. |
Use Scenario: Inverting logic-level audio control signals (e.g., mute, gain select) between codec and microcontroller in Bluetooth earbuds. IC Role / Device Role / Timing Role: Single-stage level-shifting inverter with rail-to-rail swing, interfacing 1.8 V GPIO to 3.3 V analog subsystem. Use Value: 125–250 hFE ensures full logic swing with <1 μA base current; low Cc prevents signal edge degradation at 20 kHz bandwidth. |
| PCMCIA Card Power Sequencer | Wearable Sensor Bias Controller |
Use Scenario: Enabling/disabling 3.3 V and 5 V rails in legacy PCMCIA card adapters with strict inrush current limits. IC Role / Device Role / Timing Role: High-side PNP pass transistor controlled by FPGA GPIO, providing soft-start via RC base network. Use Value: −45 V VCEO accommodates transient overshoot on hot-plug insertion; 500 K/W Rth(j-a) allows thermal budgeting without heatsinking. |
Use Scenario: Providing stable, low-noise bias current to MEMS accelerometer or gyroscope front-end amplifiers in fitness trackers. IC Role / Device Role / Timing Role: Constant-current source configured with emitter degeneration resistor, delivering 50–100 μA independent of supply ripple. Use Value: −15 nA ICBO at 25 °C ensures <0.1% current drift over time; low 10 dB noise figure preserves SNR in sub-μV sensor outputs. |
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 | Same SOT323 package (larger than SOT883); hFE 220–475 (BC857B grade); Rth(j-a) = 300 K/W. | Higher gain and better thermal performance, but 2.1 × 1.3 mm footprint occupies >3× board area. | Select when board space permits and tighter hFE consistency is required over miniaturization. |
| MMBT857LT1G | SOT23 package; hFE 100–300; VCEO = −45 V; Ptot = 310 mW; no official SOT883 footprint equivalence. | Higher power handling and industry-standard SOT23 compatibility, but incompatible with ultra-dense layouts. | Choose for prototyping or legacy board reuse where SOT23 tooling and reflow profiles are already established. |
Compared with BC857AM,315, BC857BW,115 trades miniaturization for higher gain and thermal margin, while MMBT857LT1G sacrifices footprint efficiency for broader manufacturing compatibility and higher power headroom - making BC857AM,315 optimal only when SOT883 space constraints are non-negotiable.
Availability
BC857AM,315 is available at Aetrix Electronics and suitable for mobile communications, digital camera modules, and PCMCIA card designs requiring stable component supply, long-term lifecycle assurance, and consistent parametric binning.
Supply support for BC857AM,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 high-volume 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 miniaturized, cost-sensitive portable electronics where reliability, consistent hFE binning, and ultra-small packaging are mandatory.
FAQ
Is BC857AM,315 RoHS compliant and halogen-free?
Yes. BC857AM,315 meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. Nexperia's SOT883 package uses lead-free matte tin plating and green molding compound, with full compliance documentation available in the product's environmental report (document number Q60015).
What is the maximum allowable soldering temperature profile for SOT883 packages?
Nexperia specifies a peak reflow temperature of 260 °C for 10–15 seconds, with ramp-up rate ≤3 °C/s and ramp-down rate ≤6 °C/s. The SOT883 body must not exceed 260 °C at any point; thermal profiling must account for its low thermal mass and direct pad coupling to PCB copper.
Can BC857AM,315 replace BC857B or BC857C in existing designs?
No - BC857AM,315 has hFE = 125–250, whereas BC857BM and BC857CM have higher gain ranges (220–475 and 420–800). Substituting without circuit recalibration risks insufficient drive in high-gain-dependent applications like low-base-current switches or linear amplifiers.
Does BC857AM,315 support automotive AEC-Q101 qualification?
No. BC857AM,315 is qualified to industrial-grade standards (IEC 60747-17) only. For automotive applications, Nexperia offers the AEC-Q101-qualified PNP transistor PBSS4041PAS in SOT883, which shares identical footprint and mechanical specs but includes extended temperature testing and failure analysis.
BC857AM,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:
- 125 @ 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
BC857AM,315 FAQ
1.How can I place an order for BC857AM,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857AM,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 BC857AM,315 reliable?
The price and inventory of BC857AM,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857AM,315 is usually 5 days.
3.What payment methods are accepted for BC857AM,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857AM,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857AM,315?
BC857AM,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857AM,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 BC857AM,315?
For technical support, including BC857AM,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857AM,315 requirements.
6.How does Aetrix verify that BC857AM,315 is sourced from the original manufacturer or authorized distributors?
All BC857AM,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 BC857AM,315 meets industry standards.
7.What is the process for return or replacement of BC857AM,315?
All BC857AM,315 units undergo pre-shipment inspection (PSI). If there is an issue with BC857AM,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 BC857AM,315 part is unused and in its original packaging.
Return procedure for BC857AM,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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