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Diodes Incorporated BC856BW-7-F
- Part No.:
- BC856BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856BW-7-F.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:23,433
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Product details
Overview
BC856BW-7-F from Diodes Incorporated is a PNP small-signal transistor in SOT323 package, rated for -65 V VCEO, -100 mA IC, and 200 mW power dissipation, with DC current gain (hFE) of 220–475 (Group B) at -2 mA IC. It serves as a general-purpose switching and audio-frequency amplifier device in compact, lead-free PCB designs.
For engineers reviewing the BC856BW-7-F datasheet, BC856BW-7-F pinout, BC856BW-7-F application, or BC856BW-7-F equivalent, key selection criteria include its complementary NPN pairing (BC847BW), SOT323 thermal performance (RθJA = 625 °C/W), low VCE(sat) (-75 mV typ. @ -10 mA/-0.5 mA), and AEC-Q101 qualification path via automotive-grade variants.
Technical Context
This PNP bipolar junction transistor operates in linear amplification and saturated switching modes, with guaranteed breakdown voltages of -80 V VCBO and -5 V VEBO. Its fT of 100–200 MHz supports AF and low-speed digital signal handling up to ~10 MHz edge rates.
Designed for surface-mount automation, it features matte tin-plated leads compliant with MIL-STD-202 Method 208 and moisture sensitivity level 1 per J-STD-020. The SOT323 footprint enables high-density layout while maintaining thermal derating curves validated per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -65 V - Maximum collector-emitter voltage before avalanche conduction in common-emitter configuration |
| IC | -100 mA - Continuous collector current limit defining safe DC switching or amplification range |
| hFE (Group B) | 220–475 - Confirmed DC current gain at -5 V VCE, -2 mA IC; enables predictable base drive sizing |
| VCE(sat) | -75 mV (typ.) @ -10 mA/-0.5 mA - Low saturation voltage ensures minimal power loss in switching applications |
| fT | 100–200 MHz - Gain-bandwidth product confirming usable frequency response up to mid-AF range |
| PD | 200 mW - Maximum steady-state power dissipation on FR4 with 1 oz copper under still-air conditions |
| RθJA | 625 °C/W - Thermal resistance from junction to ambient, critical for temperature rise estimation in layout |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount case (2.15 mm × 2.10 mm × 0.95 mm), UL 94V-0 rated, 0.006 g weight, optimized for automated pick-and-place.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink terminal; connects to higher potential node in PNP operation; requires proper grounding or bias reference |
| 2 (Base) | B | Control input; forward-biased with negative voltage relative to emitter to enable conduction |
| 3 (Collector) | C | Current source terminal; delivers load current when saturated; ties to supply rail in high-side switch topology |
Key Features
| Feature | Design Value |
|---|---|
| Complementary NPN pairing | Direct match with BC847BW enables balanced push-pull stages without gain mismatch or thermal drift asymmetry |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb); eliminates hazardous substance compliance risk |
| JEDEC-qualified reliability | Validated to high-reliability standards referenced in AEC-Q101; supports industrial and automotive derivative qualification paths |
| SOT323 automation compatibility | Matte tin-plated leads and Level 1 moisture sensitivity ensure robust reflow yield and eliminate pre-bake requirements |
Applications
| LED Driver Circuit | Level-Shifting Interface |
|---|---|
Use Scenario: Driving discrete indicator LEDs from 3.3 V or 5 V microcontroller GPIOs with current limiting. IC Role / Device Role / Timing Role: Low-side PNP switch controlling LED anode connection to VCC while sinking base current. Use Value: VCE(sat) ≤ -300 mV at -10 mA ensures >95% LED forward voltage utilization and minimal self-heating. |
Use Scenario: Translating logic signals between 5 V legacy peripherals and 3.3 V MCU inputs. IC Role / Device Role / Timing Role: Inverting level shifter using emitter-follower or common-emitter configuration. Use Value: hFE ≥ 220 guarantees stable DC transfer with <1 µs propagation delay across 0–10 kHz transitions. |
| Audio Preamp Stage | Power Supply Enable Switch |
Use Scenario: Low-noise voltage amplification in portable audio front-ends (e.g., electret mic biasing). IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter degeneration resistor for linearity control. Use Value: NF ≤ 10 dB at 1 kHz and 200 µA IC maintains SNR > 60 dB in battery-powered signal chains. |
Use Scenario: Enabling/disabling auxiliary 12 V rails in industrial controllers via 3.3 V logic. IC Role / Device Role / Timing Role: High-side switch controlling PMOS gate drive or optocoupler input. Use Value: -65 V VCEO rating allows safe operation with 12 V rail + transient margin; -200 mA ICM handles inrush. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC856BMTF | Same electrical specs but in SOT-23 package; RθJA = 450 °C/W (better thermal performance) | Higher power handling in same footprint; preferred where board space permits larger pad area | Select when thermal margin is constrained and SOT-23 mounting is acceptable |
| MMBT856 | Identical VCEO/IC/hFE but manufactured by ON Semiconductor; slightly higher VBE(on) (-700 mV min) | Drop-in replacement in most non-critical timing or gain-stable circuits | Choose for multi-source procurement strategy where second-source validation is required |
Compared with BC856BW-7-F, BC856BMTF offers superior thermal resistance in SOT-23, while MMBT856 provides cross-manufacturer sourcing flexibility-neither matches the SOT323 size advantage or Diodes' specific green compound formulation.
Availability
BC856BW-7-F is available at Aetrix Electronics and suitable for LED driver circuits, level-shifting interfaces, audio preamplifier stages, and power supply enable switches requiring stable component supply and RoHS-compliant packaging.
Supply support for BC856BW-7-F 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 North America.
BC856BW-7-F belongs to Diodes' BC856–BC858 family of PNP transistors engineered for high-volume, cost-sensitive consumer and industrial applications demanding consistent gain grouping, tight parameter distribution, and automated assembly readiness.
FAQ
Is BC856BW-7-F pin-compatible with BC847BW?
No-BC856BW-7-F is PNP and BC847BW is NPN; they share identical SOT323 pinout (E-B-C), enabling complementary layout placement, but polarity reversal must be accounted for in circuit design and netlist routing.
What is the maximum operating temperature for continuous use?
The BC856BW-7-F has an operating junction temperature range of -55 °C to +150 °C. At ambient temperatures above +75 °C, derating per Figure 1 applies: power dissipation must be reduced linearly to zero at +150 °C ambient on standard FR4.
Does this part meet AEC-Q101 requirements?
The BC856BW-7-F is not automotive-qualified; however, its automotive-grade counterpart BC856BWQ-13-F is AEC-Q101 qualified, PPAP-capable, and manufactured in IATF 16949 certified facilities-available separately with Q-suffix marking.
Can BC856BW-7-F replace BC556 in existing designs?
Yes, with verification: both are PNP transistors with similar VCEO (-65 V) and IC (-100 mA), but BC856BW-7-F uses SOT323 (vs. TO-92 for BC556), requiring PCB footprint change and thermal re-evaluation due to higher RθJA.
BC856BW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 220 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC856BW-7-F FAQ
1.How can I place an order for BC856BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BW-7-F 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 BC856BW-7-F reliable?
The price and inventory of BC856BW-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BW-7-F is usually 5 days.
3.What payment methods are accepted for BC856BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BW-7-F?
BC856BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BW-7-F 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 BC856BW-7-F?
For technical support, including BC856BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BW-7-F requirements.
6.How does Aetrix verify that BC856BW-7-F is sourced from the original manufacturer or authorized distributors?
All BC856BW-7-F 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 BC856BW-7-F meets industry standards.
7.What is the process for return or replacement of BC856BW-7-F?
All BC856BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BC856BW-7-F, 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 BC856BW-7-F part is unused and in its original packaging.
Return procedure for BC856BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BW-7-F Tags
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MMBT3906LT1G
onsemi
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Diodes Incorporated
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MMBT3904LT1G
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onsemi
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Nexperia USA Inc.
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