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Diodes Incorporated BC856AS-7
- Part No.:
- BC856AS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC856AS-7.pdf
- Description:
- TRANS 2PNP 65V 100MA SOT-363
- Quantity:
- Payment:
- Shipping:
Inventory:6,246
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Product details
Overview
BC856AS-7 from Diodes Incorporated is a dual PNP small-signal transistor in SOT363 package, rated for -65 V VCEO, -100 mA IC, and 200 mW power dissipation, with DC current gain (hFE) of 125–250 at -2 mA collector current - used in automotive-grade switching and audio-frequency amplifier stages.
For engineers reviewing the BC856AS-7 datasheet, BC856AS-7 pinout, BC856AS-7 application, or BC856AS-7 equivalent, key selection criteria include complementary NPN pairing (BC846AS), AEC-Q101 qualification status, thermal resistance (625 °C/W), and SOT363 footprint compatibility in space-constrained PCB layouts.
Technical Context
This dual PNP transistor operates as two independent high-voltage, medium-current switching elements sharing a common SOT363 thermally efficient package. Each emitter-base junction withstands -5 V, and each collector-base junction supports -80 V, enabling robust operation in negative-rail bias configurations.
Its fT of 100 MHz at -5 V VCE and -10 mA IC confirms suitability for AF amplification up to ~10 kHz with stable gain margin, while low VCE(sat) (-75 mV typ. at -10 mA/-0.5 mA) ensures minimal conduction loss in saturated-switch applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -65 V - maximum allowable collector-emitter voltage before breakdown in common-emitter configuration |
| IC | -100 mA - continuous DC collector current per transistor, defining safe linear/switching load capacity |
| hFE | 125–250 - DC current gain range at VCE = -5 V, IC = -2 mA, critical for bias stability in amplifier designs |
| VCE(sat) | -75 mV (typ.) at IC = -10 mA / IB = -0.5 mA - low saturation voltage enables efficient switching with <0.75 mW conduction loss |
| RθJA | 625 °C/W - junction-to-ambient thermal resistance on standard FR-4 PCB, limiting max power at +25°C ambient to ~200 mW |
| fT | 100 MHz - unity-gain frequency confirming usable bandwidth for AF amplification and fast digital switching |
Pinout & Package
SOT363 is a 6-pin, surface-mount, plastic-molded package with matte tin terminals, UL 94V-0 rating, and moisture sensitivity level 1. Dimensions: 2.15 mm × 2.10 mm × 0.95 mm (L × W × H), weight ≈ 0.006 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of Transistor 1 | Current sink node for first PNP; tied to most negative rail in common-emitter switch |
| 2 | Base of Transistor 1 | Control input requiring negative base current to turn on; referenced to emitter (pin 1) |
| 3 | Collector of Transistor 1 | Output node for first transistor; connects to load or next stage with reverse polarity bias |
| 4 | Collector of Transistor 2 | Independent output node for second PNP; electrically isolated from pin 3 |
| 5 | Base of Transistor 2 | Separate control input; allows independent switching of dual channels in one footprint |
| 6 | Emitter of Transistor 2 | Second current sink node; may be tied to same or separate negative reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual PNP topology | Two matched transistors in single SOT363 package reduce board area by ~40% vs discrete SOT23 solutions |
| AEC-Q101 qualified marking | "KPS" marking on device indicates compliance with automotive reliability stress tests (HTOL, TC, ESD, etc.) |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets automotive environmental mandates |
| Low VCE(sat) at high IC | -300 mV max at -100 mA/-5 mA enables efficient high-current switching without external heat sinking |
Applications
| Automotive Door Module Switching | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Controlling window lift motors and mirror actuators in door control units using PWM-driven PNP switches. IC Role / Device Role / Timing Role: Dual PNP switch providing isolated, high-side current sinking for 12 V loads with reverse-polarity protection. Use Value: -65 V VCEO withstands load-dump transients; dual-channel layout simplifies routing of two independent actuator drivers. | Use Scenario: Amplifying low-level thermistor or RTD bridge outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: PNP-based differential pair in discrete op-amp front-end for rail-to-rail input capability near negative supply. Use Value: hFE consistency across both transistors (125–250) ensures matched gain in balanced amplifier topologies. |
| Consumer Audio Pre-amplifier Stage | Medical Infusion Pump Motor Driver |
Use Scenario: Low-noise AF pre-amplifier for portable hearing aids and Bluetooth earbuds requiring compact, low-power gain blocks. IC Role / Device Role / Timing Role: Common-emitter PNP amplifier biased at -2 mA, leveraging 100 MHz fT for flat response up to 20 kHz. Use Value: VBE(on) of -600 to -820 mV enables stable biasing with minimal temperature drift over -40°C to +85°C. | Use Scenario: Driving micro-stepper motor phases in battery-powered infusion pumps where reverse-battery protection is mandatory. IC Role / Device Role / Timing Role: High-side PNP switch controlling phase current direction with integrated reverse-polarity blocking. Use Value: -80 V VCBO prevents breakdown during accidental reverse connection; SOT363 footprint fits tight medical PCB constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BS-7 | VCEO = -45 V (lower), hFE = 200–450 (higher), same SOT363 package | Not suitable for 65 V load-dump environments; preferred in low-voltage, high-gain AF stages | Select when higher hFE and lower voltage stress are prioritized over breakdown margin |
| MBT3906DW1T1G | VCEO = -40 V, RθJA = 500 °C/W (better), no AEC-Q101 marking | Lacks automotive qualification; better thermal performance but unsuitable for automotive PPAP programs | Choose for industrial non-automotive designs needing improved thermal dissipation without qualification overhead |
Compared with BC856AS-7, BC857BS-7 trades breakdown voltage for higher gain in identical footprint, while MBT3906DW1T1G offers superior thermal resistance but omits AEC-Q101 traceability - making BC856AS-7 optimal for automotive systems requiring both voltage margin and qualification evidence.
Availability
BC856AS-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC analog inputs, consumer audio pre-amplifiers, and medical infusion pump motor drivers requiring stable component supply with full traceability.
Supply support for BC856AS-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BC856AS-7 belongs to Diodes' automotive-qualified small-signal transistor family, engineered specifically for AEC-Q101-compliant switching and amplification in harsh-environment vehicle subsystems.
FAQ
Is BC856AS-7 pin-compatible with BC846AS?
No - BC856AS-7 is a dual PNP transistor, while BC846AS is its complementary dual NPN counterpart. They share identical SOT363 pinout (E-B-C / C-B-E), enabling direct pairing in push-pull or differential circuits, but are not functionally interchangeable. Pin 1 is emitter for both, pin 2 base, pin 3 collector for first device; pin 4 collector, pin 5 base, pin 6 emitter for second device.
What does the "KPS" marking on BC856AS-7 indicate?
The "KPS" marking denotes product type identification per Diodes' internal coding system and confirms AEC-Q101 qualification status. It appears alongside date code (e.g., "I9" for September 2021) on the top surface. This marking is verified in the official DS30834 datasheet and distinguishes it from non-automotive variants like BC856AS.
Can BC856AS-7 operate at 125°C junction temperature?
Yes - its specified operating temperature range is -65°C to +150°C. At 125°C junction, derated power dissipation is ~120 mW (calculated via PD = (TJ – TA) / RθJA). For continuous operation at this temperature, ambient must remain ≤ 50°C or board-level thermal design must improve heat spreading beyond the standard FR-4 reference layout.
Does BC856AS-7 meet RoHS 3 and REACH requirements?
Yes - BC856AS-7 is fully compliant with EU Directive 2015/863/EU (RoHS 3), containing <1000 ppm lead, <900 ppm bromine/chlorine, and <1000 ppm antimony. It is also REACH SVHC-free per Diodes' published declarations, and all plating uses matte tin per MIL-STD-202, Method 208.
BC856AS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 125 @ 2mA, 5V
- Power - Max:
- 200mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BC856AS-7 FAQ
1.How can I place an order for BC856AS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856AS-7 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 BC856AS-7 reliable?
The price and inventory of BC856AS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856AS-7 is usually 5 days.
3.What payment methods are accepted for BC856AS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856AS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856AS-7?
BC856AS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856AS-7 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 BC856AS-7?
For technical support, including BC856AS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856AS-7 requirements.
6.How does Aetrix verify that BC856AS-7 is sourced from the original manufacturer or authorized distributors?
All BC856AS-7 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 BC856AS-7 meets industry standards.
7.What is the process for return or replacement of BC856AS-7?
All BC856AS-7 units undergo pre-shipment inspection (PSI). If there is an issue with BC856AS-7, 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 BC856AS-7 part is unused and in its original packaging.
Return procedure for BC856AS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856AS-7 Tags
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