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Nexperia USA Inc. BC856AW,135
- Part No.:
- BC856AW,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856AW,135.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,720
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Product details
Overview
BC856AW,135 from Nexperia is a PNP general-purpose bipolar junction transistor (BJT) in SOT323 (SC-70) surface-mount package, rated for −65 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-power switching or linear amplification device in compact consumer and industrial signal-path circuits.
For engineers reviewing the BC856AW,135 datasheet, BC856AW,135 pinout, BC856AW,135 application, or BC856AW,135 equivalent, this page delivers verified electrical parameters, terminal roles, thermal limits, real-world use cases, and validated alternative parts - all aligned with Nexperia's Rev. 4 (July 2023) product data sheet.
Technical Context
The BC856AW,135 operates as a silicon PNP BJT with base-controlled current amplification. Its hFE range (125–250) supports predictable biasing in Class-A amplifiers and saturated-switch configurations. The device features VCEO = −65 V and VEBO = −5 V, enabling operation in low-voltage negative-rail logic interfaces and level-shifting stages.
Thermal resistance Rth(j-a) is 625 K/W on FR4 PCB (single-sided, 35 µm Cu), limiting continuous power dissipation to 200 mW at Tamb ≤ 25 °C. Saturation voltages are specified at IC/IB = 20: VCE(sat) ≤ −250 mV (IC = −100 mA, IB = −5 mA) and VBE(sat) ≤ −850 mV under same conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum collector-emitter voltage before breakdown; defines safe operating range in negative-rail switching applications. |
| IC | −100 mA: Continuous collector current rating; sets upper limit for load-driving capability in small-signal stages. |
| hFE | 125–250 at VCE = −5 V, IC = −2 mA: Predictable DC current gain for stable bias design in amplifiers and switches. |
| VCE(sat) | ≤ −250 mV at IC = −100 mA, IB = −5 mA: Low saturation voltage minimizes power loss and heating in ON-state switching. |
| Ptot | 200 mW at Tamb ≤ 25 °C: Total power dissipation limit on standard FR4 PCB; constrains thermal design margin. |
| Rth(j-a) | 625 K/W: Junction-to-ambient thermal resistance; determines temperature rise per watt under natural convection. |
| fT | 100 MHz: Transition frequency at VCE = −5 V, IC = −10 mA; indicates usable bandwidth for RF-coupled or high-speed switching. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 3-terminal, ultra-small footprint (2.2 mm × 1.35 mm × 0.95 mm), optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires external bias resistor network to set operating point in active or saturation region. |
| 2 | Emitter (E) | Common reference terminal for PNP configuration; connected to higher potential rail (e.g., VCC or ground return in negative-rail systems). |
| 3 | Collector (C) | Output current sink node; delivers amplified or switched current to load referenced to emitter or common rail. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage PNP switching | Rated for −65 V VCEO and −5 V VEBO, enabling reliable operation in sub-12 V negative-rail control paths. |
| Precision hFE binning | 125–250 gain range ensures consistent DC bias stability across production lots without recalibration. |
| Ultra-compact SMT package | SOT323 footprint saves >60% board area vs. SOT23; compatible with standard 0.5 mm pitch reflow profiles. |
| Low saturation loss | VCE(sat) ≤ −250 mV at full rated current reduces conduction loss and self-heating in battery-powered devices. |
Applications
| LED Driver Stage | Level-Shifting Interface |
|---|---|
Use Scenario: Driving low-current indicator LEDs from microcontroller GPIO pins with inverted logic (active-low). IC Role / Device Role / Timing Role: PNP switch sinking current from VCC through LED to MCU output pin. Use Value: VCE(sat) ≤ −250 mV ensures minimal voltage drop across transistor, preserving LED forward voltage margin and brightness consistency. |
Use Scenario: Translating 3.3 V logic signals to −5 V or −12 V domains in mixed-supply analog front-ends. IC Role / Device Role / Timing Role: Active-low level shifter using emitter-follower or common-emitter inversion topology. Use Value: VCEO = −65 V and hFE ≥ 125 support robust DC-coupled translation with <100 ns propagation delay in saturated mode. |
| Audio Signal Amplifier | Power Supply Enable Control |
Use Scenario: Low-noise preamplification stage in portable audio codecs or microphone bias circuits. IC Role / Device Role / Timing Role: Class-A common-emitter amplifier with fixed emitter degeneration resistor. Use Value: NF = 2–10 dB at 1 kHz and fT = 100 MHz enable clean amplification up to 20 kHz with minimal distortion. |
Use Scenario: Enabling/disabling auxiliary rails (e.g., −5 V analog supply) via microcontroller command in embedded systems. IC Role / Device Role / Timing Role: High-side PNP switch controlling PMOS gate or LDO enable input. Use Value: IC = −100 mA rating and 200 mW power limit allow direct control of moderate-current enable lines without external driver staging. |
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 |
|---|---|---|---|
| BC857AW,135 | VCEO = −45 V (vs. −65 V); identical hFE (125–250), package, and pinout. | Not suitable for >−45 V collector-rail applications; otherwise drop-in replacement where voltage headroom is lower. | Select when system VCC ≤ −45 V and cost optimization is prioritized over maximum voltage margin. |
| BC846AW,135 | NPN complement; same VCEO = 65 V, hFE = 125–250, SOT323 package, but reversed polarity and pinout (1=C, 2=B, 3=E). | Requires circuit topology inversion (e.g., low-side vs. high-side switching); not pin-compatible. | Choose only when redesign permits NPN-based architecture and complementary drive is needed in dual-transistor configurations. |
Compared with BC857AW,135, the BC856AW,135 provides 20 V higher collector-emitter blocking capability - critical for legacy industrial controllers using −65 V rails. Versus BC846AW,135, it enables high-side sourcing without level-shifting circuitry, simplifying PCB layout in single-supply negative-rail systems.
Availability
BC856AW,135 is available at Aetrix Electronics and suitable for LED driver stages, level-shifting interfaces, audio signal amplifiers, and power supply enable control requiring stable component supply, consistent hFE binning, and SOT323 footprint compatibility.
Supply support for BC856AW,135 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 essential semiconductors for automotive, industrial, mobile, and computing markets.
The BC856AW,135 belongs to Nexperia's BC856/857/858W series of general-purpose PNP transistors, designed specifically for space-constrained, cost-sensitive signal switching and amplification in consumer and industrial electronics.
FAQ
What is the maximum allowable junction temperature for BC856AW,135?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in IEC 60134 limiting values. Operation above this threshold risks permanent parametric shift or catastrophic failure. Derating is required above Tamb = 25 °C per Rth(j-a) = 625 K/W; at 70 °C ambient, max usable power drops to ~120 mW.
Is BC856AW,135 pin-compatible with BC846AW,135?
No - BC856AW,135 (PNP) and BC846AW,135 (NPN) share the SOT323 package but have reversed pinouts: BC856AW uses Pin 1=Base, Pin 2=Emitter, Pin 3=Collector; BC846AW uses Pin 1=Collector, Pin 2=Base, Pin 3=Emitter. Direct substitution would invert circuit function and likely cause malfunction.
Does BC856AW,135 support pulsed operation beyond its DC ratings?
Yes - peak collector current (ICM) is rated at −200 mA for short pulses (tp ≤ 300 µs, duty cycle ≤ 0.02). This allows brief surge handling in relay drivers or pulse-width modulated LED dimming, provided average power remains within 200 mW and thermal mass prevents junction overheating.
How does the BC856AW,135 marking code differ from BC856W?
BC856AW,135 is marked "3A%" (where % is manufacturing site code), while BC856W is marked "3D%". The "A" suffix denotes the hFE bin (125–250), distinguishing it from BC856W (125–475) and BC856BW (220–475). This binning ensures tighter gain distribution for precision biasing without external trimming.
BC856AW,135 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):
- 65 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
BC856AW,135 FAQ
1.How can I place an order for BC856AW,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856AW,135 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 BC856AW,135 reliable?
The price and inventory of BC856AW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856AW,135 is usually 5 days.
3.What payment methods are accepted for BC856AW,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856AW,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856AW,135?
BC856AW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856AW,135 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 BC856AW,135?
For technical support, including BC856AW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856AW,135 requirements.
6.How does Aetrix verify that BC856AW,135 is sourced from the original manufacturer or authorized distributors?
All BC856AW,135 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 BC856AW,135 meets industry standards.
7.What is the process for return or replacement of BC856AW,135?
All BC856AW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BC856AW,135, 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 BC856AW,135 part is unused and in its original packaging.
Return procedure for BC856AW,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856AW,135 Tags
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