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onsemi SBC856BLT3
- Part No.:
- SBC856BLT3
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SBC856BLT3.pdf
- Description:
- TRANS PNP 65V 0.1A SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:110,000
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Product details
Overview
SBC856BLT3 from onsemi is a PNP silicon general-purpose transistor in SOT-23 package, rated for −65 V VCEO, −100 mA IC, and 225 mW power dissipation on FR-5 board; it delivers hFE = 220–475 at IC = −10 mA, VCE = −5 V, and supports low-voltage switching in discrete logic and signal inversion circuits.
For engineers reviewing the SBC856BLT3 datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, guaranteed VCEO ≥ −65 V, confirmed SOT-23 footprint compatibility, and documented hFE range across production lots per ON Semiconductor BC856ALT1 Series specification.
Technical Context
The SBC856BLT3 operates as a medium-voltage, medium-current PNP bipolar junction transistor optimized for linear amplification and saturated switching. Its −65 V VCEO and −80 V VCBO support robust blocking in negative-rail bias configurations, while its fT = 100 MHz enables stable operation up to audio-frequency signal paths.
Thermal design is constrained by RJA = 556 °C/W on FR-5 board and 417 °C/W on alumina substrate, with derating of 1.8 mW/°C above 25°C. The device exhibits VBE(sat) = −0.7 V (typ) at IC/IB = 10 and VCE(sat) = −0.3 V (max) under same conditions - critical for low-loss switching in battery-powered load control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum collector-emitter voltage before breakdown; enables use in −48 V telecom bias rails or industrial −24 V control systems. |
| IC | −100 mA: Continuous collector current rating; supports driving LEDs, relays, or small-signal MOSFET gates without external heat sinking. |
| hFE | 220–475 @ IC = −10 mA, VCE = −5 V: Confirmed DC current gain range ensures predictable base drive sizing in amplifier and switch designs. |
| fT | 100 MHz: Current-gain bandwidth product; validates suitability for audio preamplifiers and low-speed digital signal conditioning up to ~10 MHz. |
| VCE(sat) | −0.3 V (max) @ IC = −10 mA, IB = −0.5 mA: Low saturation voltage minimizes power loss in high-duty-cycle switching applications. |
| Cob | 4.5 pF @ VCB = −10 V: Output capacitance limits high-frequency gain roll-off and affects stability in RF-coupled stages. |
Pinout & Package
SBC856BLT3 uses the industry-standard SOT-23 (TO-236AB) package with 3-pin configuration and JEDEC case outline 318. Dimensions: 2.90 mm × 1.30 mm × 0.95 mm (L × W × H), with 1.90 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to turn on. |
| 2 | Emitter | Current source terminal in PNP topology; connected to higher potential rail (e.g., VCC or bias supply) in common-emitter configuration. |
| 3 | Collector | Current sink terminal; output node where load connects to ground or lower-potential return path in standard switching layout. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free SOT-23 packaging | Complies with RoHS Directive 2011/65/EU; eliminates lead contamination risk during reflow soldering and end-of-life recycling. |
| −65 V VCEO rating | Enables direct replacement of legacy BC556/BC557 in −48 V telecom line cards without redesigning voltage margining. |
| hFE binning (B grade) | Guaranteed 220–475 gain spread ensures consistent base resistor selection across production batches for reliable switching thresholds. |
| Low VCE(sat) | −0.3 V max reduces conduction loss to <1.5 mW at 5 mA load, extending battery life in portable sensor interface modules. |
| 100 MHz fT | Supports stable small-signal amplification up to 10 kHz with >20 dB gain margin, meeting Class AB audio buffer requirements. |
Applications
| Industrial Sensor Signal Conditioning | Telecom Line Card Bias Control |
|---|---|
Use Scenario: Amplifying low-level thermocouple or RTD bridge outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: PNP active load in differential pair amplifier stage, providing rail-to-rail output swing referenced to +24 V supply. Use Value: −65 V VCEO allows safe operation with transient overvoltage protection clamps up to −60 V, preventing latch-up during ESD events. |
Use Scenario: Controlling bias current to laser diode drivers in optical line terminals (OLTs) operating from −48 V DC distribution. IC Role / Device Role / Timing Role: Constant-current sink regulating reference current for TIA feedback networks in GPON upstream receivers. Use Value: Verified hFE consistency ensures ±3% current regulation accuracy across temperature (−40°C to +85°C), meeting GR-468 reliability standards. |
| Automotive Body Control Module (BCM) Load Switching | Consumer Audio Preamp Stage |
Use Scenario: Driving incandescent dome lights and door lock solenoids in 12 V automotive BCMs with reverse-battery protection. IC Role / Device Role / Timing Role: High-side switch configured with emitter tied to battery rail and collector feeding load to chassis ground. Use Value: −0.3 V VCE(sat) limits power dissipation to 3 mW at 10 mA base drive, eliminating need for thermal relief pads on cost-sensitive PCBs. |
Use Scenario: Implementing tone-control mid-band boost in portable Bluetooth speaker front-end with single-supply +5 V operation. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with emitter degeneration resistor, biased via dual-resistor network from +5 V rail. Use Value: 100 MHz fT and 4.5 pF Cob ensure flat frequency response from 20 Hz to 20 kHz with <0.1 dB ripple, satisfying IEC 60268-3 fidelity requirements. |
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 |
|---|---|---|---|
| BC856BLT1 | Same die, 3,000-piece tape-and-reel vs. 10,000-piece; identical electrical specs and SOT-23 footprint. | No functional difference; selected when smaller batch procurement aligns with pilot production volumes. | Choose BC856BLT1 for NPI builds or qualification runs requiring ≤3k units per order. |
| MMBT856 | Identical hFE bin (B), but VCEO = −60 V (vs. −65 V); otherwise matches SOT-23 pinout and thermal specs. | Marginally reduced voltage headroom; unsuitable for −48 V systems with >5 V transients. | Select MMBT856 only in 24 V or lower-rail applications where −60 V rating suffices and second-source validation is required. |
Compared with BC856BLT1 and MMBT856, the SBC856BLT3 offers identical performance to BC856BLT1 with higher reel quantity efficiency, while providing 5 V higher VCEO than MMBT856 - a decisive advantage in telecom and industrial −48 V infrastructure where transient immunity is critical.
Availability
SBC856BLT3 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line card bias control, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SBC856BLT3 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BC856ALT1 Series - including SBC856BLT3 - was designed as a drop-in upgrade to legacy BC556/BC557 transistors, delivering tighter hFE binning, improved thermal resistance, and Pb-free compliance for modern high-reliability embedded systems.
FAQ
What is the maximum collector-emitter voltage rating for SBC856BLT3?
The SBC856BLT3 has a guaranteed VCEO rating of −65 V at TA = 25°C, verified per ON Semiconductor BC856ALT1 Series datasheet Rev. 10. This rating remains valid up to TJ = 150°C, though derating applies above 25°C ambient per thermal characteristics table. Designers must ensure applied VCE stays below this limit under all operating and transient conditions to prevent avalanche breakdown.
Does SBC856BLT3 have Pb-free packaging?
Yes, SBC856BLT3 is manufactured in a Pb-free SOT-23 package compliant with RoHS Directive 2011/65/EU. The "G" suffix variant (SBC856BLT3G) explicitly denotes Pb-free construction, but the base SBC856BLT3 part number also conforms per ON Semiconductor's global Pb-free policy and packaging specifications in the BC856ALT1 Series datasheet.
What is the hFE range for SBC856BLT3 at typical operating conditions?
The SBC856BLT3 is binned to the "B" gain group, with hFE = 220–475 measured at IC = −10 mA and VCE = −5.0 V, TA = 25°C. This range is guaranteed across production lots and validated in the Electrical Characteristics table of the official datasheet. At IC = −2 mA, hFE minimum rises to 270, supporting stable biasing in low-current analog stages.
Can SBC856BLT3 replace BC556 in existing designs?
Yes, SBC856BLT3 is a direct functional and mechanical replacement for BC556, sharing identical SOT-23 pinout (pin 1 = base, pin 2 = emitter, pin 3 = collector), same PNP polarity, and equal or superior ratings: VCEO (−65 V vs. −65 V), IC (−100 mA vs. −100 mA), and hFE (220–475 vs. 110–800 un-binned). No PCB changes are required for drop-in substitution.
What is the thermal resistance of SBC856BLT3 on FR-5 board?
The SBC856BLT3 has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on a standard FR-5 board (1.0 × 0.75 × 0.062 in), with 1.8 mW/°C derating above 25°C ambient. This value is specified in the Thermal Characteristics table of the BC856ALT1 Series datasheet and informs heatsink-less operation up to ~150 mW continuous power dissipation at 25°C.
SBC856BLT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- 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:
- 300 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SBC856BLT3 FAQ
1.How can I place an order for SBC856BLT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBC856BLT3 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 SBC856BLT3 reliable?
The price and inventory of SBC856BLT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBC856BLT3 is usually 5 days.
3.What payment methods are accepted for SBC856BLT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBC856BLT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBC856BLT3?
SBC856BLT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBC856BLT3 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 SBC856BLT3?
For technical support, including SBC856BLT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBC856BLT3 requirements.
6.How does Aetrix verify that SBC856BLT3 is sourced from the original manufacturer or authorized distributors?
All SBC856BLT3 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 SBC856BLT3 meets industry standards.
7.What is the process for return or replacement of SBC856BLT3?
All SBC856BLT3 units undergo pre-shipment inspection (PSI). If there is an issue with SBC856BLT3, 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 SBC856BLT3 part is unused and in its original packaging.
Return procedure for SBC856BLT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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