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Nexperia USA Inc. BC856SF
- Part No.:
- BC856SF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC856SF.pdf
- Description:
- TRANS 2PNP 65V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,400
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Product details
Overview
BC856SF from Nexperia is a dual PNP general-purpose transistor pair in SOT363-3 (TSSOP6) package, rated for −65 V VCEO, −100 mA IC, and 110 minimum hFE at −2 mA/−5 V; used for compact dual-channel switching and amplification in space-constrained analog and logic interface circuits.
For engineers reviewing the BC856SF datasheet, BC856SF pinout, BC856SF application, or BC856SF equivalent, this page delivers verified electrical parameters, validated dual-transistor pin mapping, thermal derating curves, and direct-fit alternatives for discrete PNP pair replacement in industrial control, sensor signal conditioning, and level-shifting designs.
Technical Context
The BC856SF integrates two electrically isolated PNP transistors in a single 6-pin TSSOP package, with no mutual interference between channels-enabling independent biasing and switching. Each transistor supports VCEO = −65 V, VCBO = −80 V, and VEBO = −5 V, meeting IEC 60134 absolute maximum ratings.
It delivers low VCE(sat) of −300 mV at −100 mA/−5 mA drive and typical fT of 100 MHz at −10 mA, supporting high-speed switching up to ~10 MHz and stable DC amplification across −55 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V - Maximum safe collector-emitter voltage per transistor under open-base condition; defines upper rail limit for PNP switch operation. |
| IC | −100 mA - Continuous collector current rating per transistor; supports medium-current load switching without forced cooling. |
| hFE | 110 min @ −2 mA/−5 V - Minimum DC current gain ensures reliable base-driven switching with ≤5 mA base drive for 100 mA loads. |
| VCE(sat) | −300 mV max @ −100 mA/−5 mA - Low saturation voltage minimizes power loss and heat generation in on-state switching applications. |
| Cc | 2.5 pF max @ −10 V - Low collector capacitance preserves high-frequency response and reduces crosstalk in RF-adjacent layouts. |
| fT | 100 MHz typ @ −10 mA - Transition frequency confirms suitability for >10 MHz digital switching and narrowband amplification. |
| Rth(j-a) | 416 K/W max (per device, FR4 standard footprint) - Thermal resistance determines required PCB copper area for 250 mW continuous dissipation. |
Pinout & Package
SOT363-3 (TSSOP6) plastic surface-mount package: 2.2 mm × 1.35 mm body, 0.65 mm pitch, 0.45 mm height, tape-and-reel compatible; optimized for automated placement and reflow soldering on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of TR1 | Primary emitter connection for first PNP transistor; tied to local ground or negative rail in common-emitter configuration. |
| 2 | Base of TR1 | Control input for TR1; requires current-limited negative drive relative to emitter to turn on. |
| 3 | Collector of TR2 | Output node for second PNP transistor; connects to load or next stage when TR2 is active. |
| 4 | Emitter of TR2 | Emitter connection for TR2; electrically isolated from E1, enabling independent bias networks. |
| 5 | Base of TR2 | Independent control input for TR2; allows asynchronous switching of both transistors without coupling. |
| 6 | Collector of TR1 | Output node for TR1; shares no internal connection with C2, ensuring true dual-channel isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Low collector-emitter saturation voltage | VCE(sat) ≤ −300 mV at −100 mA enables <100 mW conduction loss per transistor in high-duty-cycle switches. |
| Closely matched hFE | Paired transistors exhibit consistent DC gain across temperature, simplifying balanced differential or push-pull circuit design. |
| No mutual interference | Electrically isolated die structure eliminates cross-talk, allowing independent switching timing and biasing for TR1 and TR2. |
| Reduced board space | Dual-transistor integration cuts component count by 50% vs. discrete SOT23 devices, saving ≥3 mm² PCB area per pair. |
Applications
| Industrial Sensor Interface | Logic-Level Translation |
|---|---|
Use Scenario: Amplifying low-level signals from thermocouples or RTDs before ADC sampling in PLC analog input modules. IC Role / Device Role / Timing Role: Dual PNP pair configured as cascode amplifier and active load, providing rail-to-rail swing and noise rejection. Use Value: Matched hFE and low VCE(sat) ensure stable gain and minimal offset drift over −40 °C to +85 °C operating range. |
Use Scenario: Converting 3.3 V CMOS logic outputs to −5 V or −12 V levels for legacy industrial bus drivers (e.g., RS-232 line drivers). IC Role / Device Role / Timing Role: TR1 and TR2 operate as complementary inverters in open-collector pull-down configuration. Use Value: Independent base control allows precise timing alignment between high- and low-side transitions, minimizing shoot-through risk. |
| LED Matrix Row Driver | Power Supply Enable Control |
Use Scenario: Driving 8×8 monochrome LED matrix rows using multiplexed PNP current sinks in portable instrumentation displays. IC Role / Device Role / Timing Role: Each BC856SF handles four rows via time-multiplexed base pulses; TR1 and TR2 share emitter common but use separate collectors. Use Value: Low Cc (2.5 pF) ensures fast turn-off (<100 ns), reducing ghosting during high-refresh-rate scanning. |
Use Scenario: Enabling/disabling auxiliary 5 V and 3.3 V rails in multi-voltage embedded systems using microcontroller GPIO pins. IC Role / Device Role / Timing Role: TR1 controls main 5 V rail; TR2 controls 3.3 V LDO enable, both driven by same MCU output through resistor network. Use Value: −65 V VCEO provides margin against inductive kickback from relay coils or motor drivers sharing the same supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PNP transistor pair applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BF | Higher hFE (220 min vs. 110 min); identical VCEO/IC/package; slightly higher VCE(sat) (−350 mV). | Better suited for low-base-drive applications (e.g., microcontroller GPIO directly driving base); less ideal where tight gain matching is critical. | Select BC857BF when base current budget is constrained and gain spread tolerance >100%. |
| MBT3906DW1T1G | Same SOT363-3 package; lower VCEO (−40 V); higher IC (−200 mA); hFE 100 min; higher Ptot (300 mW). | Acceptable for ≤−40 V systems requiring higher current drive; unsuitable for −60 V rail interfaces or precision gain-matched circuits. | Choose MBT3906DW1T1G only if system voltage stays below −40 V and thermal headroom exceeds 300 mW. |
Compared with BC856SF, BC857BF offers double the current gain at cost of slightly higher saturation voltage, while MBT3906DW1T1G trades 25 V voltage headroom for 100% higher current capacity-making BC856SF optimal for −65 V, gain-critical, space-constrained dual-switching roles.
Availability
BC856SF is available at Aetrix Electronics and suitable for industrial sensor interfaces, logic-level translation, LED matrix row driving, and power supply enable control requiring stable component supply and guaranteed long-term sourcing.
Supply support for BC856SF 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 BC856SF belongs to Nexperia's general-purpose bipolar transistor family, engineered for cost-sensitive, space-constrained applications demanding predictable DC gain, low saturation loss, and robust thermal performance in SMT assembly.
FAQ
Is BC856SF pin-compatible with BC856B or BC857B?
No-BC856SF uses SOT363-3 (6-pin TSSOP) packaging, while BC856B/BC857B are in SOT23-3 (3-pin) format. The pinout, terminal count, and physical dimensions differ entirely; no mechanical or electrical drop-in replacement exists between these packages.
Can BC856SF replace two discrete BC856A transistors in a circuit?
Yes, provided the PCB layout accommodates SOT363-3 footprint and each transistor's base, collector, and emitter are routed to corresponding pins (1–2–6 for TR1; 4–5–3 for TR2). Electrical behavior matches BC856A per transistor, including hFE ≥110 and VCEO = −65 V.
What is the maximum allowable pulsed current for BC856SF?
The datasheet specifies −100 mA as the continuous collector current rating. For pulsed operation (tp ≤ 300 µs, duty cycle δ ≤ 0.02), IC can reach −100 mA without exceeding thermal limits-no higher pulsed rating is defined; exceeding −100 mA risks junction overheating even in short bursts.
Does BC856SF have automotive qualification?
No-BC856SF is not AEC-Q101 qualified. Nexperia's official documentation states it is intended for industrial and consumer applications only; it lacks automotive-grade testing, extended temperature validation beyond −55 °C to +150 °C, and failure rate reporting required for automotive use.
BC856SF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 PNP (Dual)
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 65V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 400mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC856SF FAQ
1.How can I place an order for BC856SF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856SF 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 BC856SF reliable?
The price and inventory of BC856SF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856SF is usually 5 days.
3.What payment methods are accepted for BC856SF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856SF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856SF?
BC856SF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856SF 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 BC856SF?
For technical support, including BC856SF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856SF requirements.
6.How does Aetrix verify that BC856SF is sourced from the original manufacturer or authorized distributors?
All BC856SF 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 BC856SF meets industry standards.
7.What is the process for return or replacement of BC856SF?
All BC856SF units undergo pre-shipment inspection (PSI). If there is an issue with BC856SF, 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 BC856SF part is unused and in its original packaging.
Return procedure for BC856SF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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