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Nexperia USA Inc. BC856S-QX
- Part No.:
- BC856S-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC856S-QX.pdf
- Description:
- TRANS 2PNP 65V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,351
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Product details
Overview
BC856S-QX 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; qualified to AEC-Q101 for automotive signal switching and biasing in compact dual-transistor configurations.
For engineers reviewing the BC856S-QX datasheet, BC856S-QX pinout, BC856S-QX application, or BC856S-QX equivalent, this page delivers verified electrical parameters, validated dual-transistor pin mapping, automotive-grade thermal derating curves, and real-world switching use cases - all grounded in Nexperia's official 2026 product data sheet.
Technical Context
This device integrates two electrically isolated PNP transistors in a single 6-pin TSSOP package with no mutual interference, enabling matched gain pairing (hFE ≥ 110 per transistor) and low VCE(sat) (≤ −300 mV at −100 mA/−5 mA drive). It supports high-density analog and digital switching where space-constrained dual-PNP biasing is required.
Its AEC-Q101 qualification confirms operation across −65 °C to +150 °C ambient, with thermal resistance Rth(j-a) of 416 K/W (per device, standard FR4 footprint) and transient thermal impedance optimized for pulsed switching up to 300 µs duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe DC switching headroom in automotive 12 V/24 V systems. |
| IC | −100 mA - Continuous collector current rating; supports medium-current load switching (e.g., LED drivers, relay coils). |
| hFE | 110 min @ −2 mA/−5 V - Minimum DC current gain ensures predictable base drive requirements for reliable saturation in linear and switching modes. |
| VCE(sat) | −300 mV max @ −100 mA/−5 mA - Low saturation voltage minimizes power loss and self-heating during on-state operation. |
| Cc | 2.5 pF max @ −10 V - Low collector capacitance preserves high-frequency response up to 100 MHz fT, suitable for RF-coupled bias networks. |
| Ptot (per device) | 400 mW @ 25 °C with 1 cm² collector pad - Total dissipation limit determines thermal layout requirements for sustained dual-transistor operation. |
Pinout & Package
Package: SOT363-3 (TSSOP6), 2.2 mm × 1.35 mm × 0.95 mm body, 0.65 mm pitch, surface-mount plastic package with exposed thermal pad compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E1 | Emitter of Transistor 1 - Reference node for TR1 current path; connected to local ground or bias return in dual-emitter configurations. |
| 2 | B1 | Base of Transistor 1 - Control input for TR1; requires current-limited drive to achieve specified hFE-based amplification or switching. |
| 3 | C2 | Collector of Transistor 2 - Output node for TR2; carries switched load current referenced to VCC (PNP topology). |
| 4 | E2 | Emitter of Transistor 2 - Reference node for TR2 current path; enables independent biasing from E1 in differential or cascode arrangements. |
| 5 | B2 | Base of Transistor 2 - Independent control input for TR2; allows asynchronous or complementary switching with TR1. |
| 6 | C1 | Collector of Transistor 1 - Output node for TR1; shares same voltage rail as C2 but operates independently per pinning diagram. |
Key Features
| Feature | Design Value |
|---|---|
| Closely matched hFE | Ensures consistent current gain between TR1 and TR2, critical for balanced current mirrors and differential amplifier biasing. |
| No mutual interference | Electrically isolated die structure prevents crosstalk, enabling independent switching of two loads without signal coupling. |
| AEC-Q101 qualification | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock per industry stress test standards. |
| Low VCE(sat) | Reduces conduction losses below 300 mV at full rated current, improving efficiency in battery-powered and thermally constrained modules. |
| Small SOT363-3 footprint | Replaces two discrete SOT23 devices, saving >40% board area while maintaining identical thermal performance via optimized pad layout. |
Applications
| Automotive Door Module Switching | Industrial Sensor Bias Network |
|---|---|
Use Scenario: Controlling window lift motor direction and interior light dimming in vehicle door control units. IC Role / Device Role / Timing Role: Dual-PNP switch providing high-side current sourcing for brushed DC motor H-bridge enable paths and LED current regulation. Use Value: Matched hFE ensures symmetrical turn-on timing between motor direction paths; AEC-Q101 rating guarantees reliability over 15-year vehicle lifecycle. |
Use Scenario: Providing precision bias current to bridge-based pressure sensors and RTD front-ends in factory automation nodes. IC Role / Device Role / Timing Role: Dual-transistor current source generating stable reference currents for Wheatstone bridge excitation and sensor offset trimming. Use Value: Low collector capacitance (2.5 pF) avoids phase shift in high-impedance sensor feedback loops; low VCE(sat) maintains accuracy across supply voltage droop. |
| Consumer Audio Amplifier Stage | Medical Infusion Pump Driver |
Use Scenario: Implementing complementary emitter-follower output stage in portable headphone amplifiers. IC Role / Device Role / Timing Role: Dual-PNP pair delivering low-output-impedance, rail-to-rail sourcing capability for Class AB audio output buffering. Use Value: Tight hFE matching minimizes crossover distortion; small SOT363-3 footprint enables integration into space-limited wearable audio PCBs. |
Use Scenario: Driving solenoid valves and micro-stepper motors in battery-operated infusion pumps requiring fail-safe current limiting. IC Role / Device Role / Timing Role: Dual-transistor switch controlling valve actuation and motor phase sequencing with independent enable/disable logic. Use Value: −65 V VCEO withstands inductive kickback from solenoids; AEC-Q101 qualification aligns with IEC 62304 Class B software safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857S-Q | Higher hFE range (160–400 vs. 110–220); otherwise identical VCEO, IC, package, and AEC-Q101 status. | Better suited for low-base-drive designs (e.g., microcontroller GPIO direct drive) where gain margin is critical. | Select BC857S-Q when base current budget is ≤ 0.5 mA and higher gain consistency is needed across temperature. |
| MBT3906DW1T1G | Same SOT363 package but lower VCEO (−40 V), higher VCE(sat) (−400 mV), and no AEC-Q101 qualification. | Limited to non-automotive industrial or consumer applications with <36 V rails and relaxed reliability requirements. | Choose only for cost-sensitive non-automotive designs where −40 V rating suffices and automotive qualification is unnecessary. |
Compared with BC856S-QX, BC857S-Q offers higher gain for reduced base drive overhead, while MBT3906DW1T1G trades automotive qualification and voltage rating for lower unit cost in benign environments.
Availability
BC856S-QX is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, portable audio amplifiers, and medical infusion pump drivers requiring stable component supply across extended production lifecycles.
Supply support for BC856S-QX 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BC856S-QX belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for space-constrained, high-reliability dual-transistor switching and biasing in automotive electronics.
FAQ
Is BC856S-QX pin-compatible with BC846S or BC847S series?
No. BC856S-QX is a dual-PNP device in SOT363-3 with pinout E1-B1-C2-E2-B2-C1, whereas BC846S/BC847S are dual-NPN in same package but with inverted polarity and different pin mapping (C1-B1-E1-C2-B2-E2). Direct substitution would reverse current flow and cause circuit failure.
What is the maximum allowable continuous power dissipation at 85 °C ambient?
At 85 °C ambient, BC856S-QX derates linearly from 400 mW at 25 °C. Using the 500 mW per-device curve slope (−3.33 mW/°C), maximum dissipation is 200 mW. This assumes FR4 PCB with 1 cm² collector pad; standard footprint reduces it to ~167 mW.
Does BC856S-QX support PWM switching at 20 kHz?
Yes. With fT = 100 MHz and low Cc = 2.5 pF, BC856S-QX supports clean 20 kHz PWM switching. Measured VCE(sat) remains stable up to 100 mA, and thermal resistance allows sustained operation if average power stays within derated limits.
Can BC856S-QX be used in linear amplifier configurations?
Yes. Its hFE stability across −55 °C to +150 °C and low VBE variation (−650 mV typ. at −2 mA) support Class A biasing. However, linearity is limited by β variation above 10 mA; best practice is to operate below 5 mA collector current for low-distortion analog gain stages.
BC856S-QX 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:
- 200mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC856S-QX FAQ
1.How can I place an order for BC856S-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856S-QX 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 BC856S-QX reliable?
The price and inventory of BC856S-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856S-QX is usually 5 days.
3.What payment methods are accepted for BC856S-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856S-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856S-QX?
BC856S-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856S-QX 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 BC856S-QX?
For technical support, including BC856S-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856S-QX requirements.
6.How does Aetrix verify that BC856S-QX is sourced from the original manufacturer or authorized distributors?
All BC856S-QX 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 BC856S-QX meets industry standards.
7.What is the process for return or replacement of BC856S-QX?
All BC856S-QX units undergo pre-shipment inspection (PSI). If there is an issue with BC856S-QX, 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 BC856S-QX part is unused and in its original packaging.
Return procedure for BC856S-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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