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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi SBC808-25LT1G

Name: SBC808-25LT1G
Brand: onsemi
SKU: SBC808-25LT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SBC808-25LT1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: SBC808-25LT1G.pdf

Description:: TRANS PNP 25V 0.5A SOT23-3

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Product details

Overview

SBC808-25LT1G from onsemi is a PNP silicon general-purpose transistor rated for −25 V V_CEO, −500 mA continuous collector current, and 225 mW power dissipation on FR-5 board; it delivers h_FE = 160–400 at I_C = −100 mA, V_CE = −1.0 V, and is AEC-Q101 qualified for automotive body electronics applications.

For engineers reviewing the SBC808-25LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed V_CEO = −25 V, verified h_FE range under production-relevant bias conditions, thermal derating behavior on standard PCBs, and Pb-free SOT-23 package compatibility with automated assembly.

Technical Context

The SBC808-25LT1G operates as a medium-current PNP bipolar junction transistor with fixed gain structure optimized for linear amplification and saturated switching. Its −25 V V_CEO rating and −5.0 V V_EBO support robust operation in low-voltage negative-rail control circuits, while f_T = 100 MHz enables stable performance up to audio-frequency switching.

Thermal design is constrained by R_JA = 556 °C/W on FR-5 board and 417 °C/W on alumina substrate, requiring explicit layout consideration for sustained −500 mA loads. The device exhibits V_CE(sat) ≤ −0.7 V at I_C = −500 mA / I_B = −50 mA, confirming suitability for low-loss switching in power management blocks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−25 V - Maximum allowable collector-emitter voltage before breakdown; defines safe operating range in negative-rail bias networks.
I_C (continuous)	−500 mA - Rated DC collector current; supports load switching up to 0.5 A without forced cooling on standard PCBs.
h_FE	160–400 - DC current gain at I_C = −100 mA, V_CE = −1.0 V; ensures predictable base drive requirements across production lots.
V_CE(sat)	≤ −0.7 V - Saturation voltage at I_C = −500 mA / I_B = −50 mA; limits conduction loss to ≤350 mW in switch-mode operation.
f_T	100 MHz - Current-gain bandwidth product at I_C = −10 mA, V_CE = −5.0 V; validates usable frequency response in signal conditioning stages.
R_JA (FR-5)	556 °C/W - Junction-to-ambient thermal resistance; requires ≥100 mm² copper pour for full-power operation at TA = 25 °C.

Pinout & Package

Package: SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm, Pb-free, marked "5F" with date code; compliant with JEDEC MO-178.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input node; requires −50 mA base drive for full saturation at −500 mA collector load.
2	Emitter	Common terminal for PNP configuration; connected to higher potential rail (e.g., −12 V or −5 V supply).
3	Collector	Output terminal sourcing current to load; referenced to lower-potential node (e.g., ground or signal return).

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive temperature cycling (−40 °C to +125 °C), humidity testing, and mechanical shock per JESD22 standards.
Pb-free, halogen-free/BFR-free construction	Meets RoHS Directive 2011/65/EU and JEDEC JS709E; eliminates hazardous substances without compromising solderability or reliability.
Guaranteed h_FE range at production-relevant bias	160–400 at I_C = −100 mA, V_CE = −1.0 V ensures consistent base resistor selection across manufacturing batches.
Low V_CE(sat) at high current	≤ −0.7 V at I_C = −500 mA / I_B = −50 mA reduces power loss and thermal stress in high-duty-cycle switching.

Applications

Automotive Door Module Control	Industrial 24 V DC Load Switching
Use Scenario: Driving window lift motors, mirror actuators, and interior lighting in vehicle door modules using −12 V supply rails. IC Role / Device Role / Timing Role: PNP switch controlling current flow from battery rail to resistive/inductive loads. Use Value: V_CEO = −25 V margin accommodates load-dump transients; AEC-Q101 qualification ensures field reliability over 15-year vehicle life.	Use Scenario: Enabling/disabling solenoids, relays, and indicator LEDs in programmable logic controller (PLC) output stages. IC Role / Device Role / Timing Role: Medium-current level-shifting switch interfacing microcontroller GPIO to 24 V industrial bus. Use Value: h_FE ≥ 160 guarantees single-stage drive from 3.3 V/5 V MCU outputs; SOT-23 footprint minimizes PCB area in dense I/O modules.
Consumer Appliance Power Sequencing	Medical Diagnostic Equipment Bias Control
Use Scenario: Controlling power-up sequencing of analog sensor front-ends and display backlights in smart home appliances. IC Role / Device Role / Timing Role: Discrete PNP transistor regulating enable signals for LDOs and DC-DC converters. Use Value: V_EBO = −5.0 V supports direct interface with 3.3 V logic; low C_obo = 10 pF prevents coupling noise into sensitive analog sections.	Use Scenario: Providing precision bias current to photodiode transimpedance amplifiers and reference voltage generators in portable diagnostic tools. IC Role / Device Role / Timing Role: Linear-mode current source delivering stable −100 μA to −1 mA with minimal thermal drift. Use Value: Tight h_FE distribution and T_J = −55 to +150 °C rating ensure calibration stability across clinical operating environments.

Automotive Door Module Control

Industrial 24 V DC Load Switching

Use Scenario: Driving window lift motors, mirror actuators, and interior lighting in vehicle door modules using −12 V supply rails.

IC Role / Device Role / Timing Role: PNP switch controlling current flow from battery rail to resistive/inductive loads.

Use Value: V_CEO = −25 V margin accommodates load-dump transients; AEC-Q101 qualification ensures field reliability over 15-year vehicle life.

Use Scenario: Enabling/disabling solenoids, relays, and indicator LEDs in programmable logic controller (PLC) output stages.

IC Role / Device Role / Timing Role: Medium-current level-shifting switch interfacing microcontroller GPIO to 24 V industrial bus.

Use Value: h_FE ≥ 160 guarantees single-stage drive from 3.3 V/5 V MCU outputs; SOT-23 footprint minimizes PCB area in dense I/O modules.

Consumer Appliance Power Sequencing

Medical Diagnostic Equipment Bias Control

Use Scenario: Controlling power-up sequencing of analog sensor front-ends and display backlights in smart home appliances.

IC Role / Device Role / Timing Role: Discrete PNP transistor regulating enable signals for LDOs and DC-DC converters.

Use Value: V_EBO = −5.0 V supports direct interface with 3.3 V logic; low C_obo = 10 pF prevents coupling noise into sensitive analog sections.

Use Scenario: Providing precision bias current to photodiode transimpedance amplifiers and reference voltage generators in portable diagnostic tools.

IC Role / Device Role / Timing Role: Linear-mode current source delivering stable −100 μA to −1 mA with minimal thermal drift.

Use Value: Tight h_FE distribution and T_J = −55 to +150 °C rating ensure calibration stability across clinical operating environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC808-25LT1G	Same die, identical electrical specs, but marked "5F" without "S" prefix; not AEC-Q101 qualified.	Not approved for automotive use; suitable for industrial/commercial designs where qualification is not mandated.	Select when cost sensitivity outweighs automotive compliance requirements and full lifecycle traceability is not needed.
MMBT808	Identical SOT-23 package and pinout; h_FE min = 100 (vs. 160), V_CEO = −25 V, same V_CE(sat) spec.	Lower guaranteed gain increases base drive uncertainty; acceptable where marginal h_FE variation is tolerable.	Choose for non-critical commercial applications with relaxed gain consistency requirements and tighter BOM cost targets.

Compared with BC808-25LT1G and MMBT808, the SBC808-25LT1G provides certified automotive reliability, higher minimum h_FE, and documented thermal derating curves-making it the only option for safety-critical or long-lifecycle deployments requiring PPAP documentation.

Availability

SBC808-25LT1G is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and consumer appliance power sequencing requiring stable component supply and long-term obsolescence management.

Supply support for SBC808-25LT1G 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, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The BC808 family was designed specifically for high-volume, cost-sensitive PNP switching and amplification tasks in automotive and industrial control systems-emphasizing AEC-Q101 compliance, thermal robustness, and SOT-23 manufacturability.

FAQ

What is the maximum continuous collector current rating for the SBC808-25LT1G?

The SBC808-25LT1G is rated for −500 mA continuous collector current (I_C) at T_A = 25 °C on FR-5 board. Derating applies above 25 °C at 1.8 mW/°C, limiting usable current in elevated ambient temperatures unless additional copper area or thermal vias are implemented. This rating is confirmed in the Thermal Characteristics table of the official onsemi datasheet.

Is the SBC808-25LT1G pin-compatible with the BC808-25LT1G?

Yes, the SBC808-25LT1G shares identical SOT-23 pinout (Style 6: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector) and mechanical dimensions with the BC808-25LT1G. However, the "S" prefix denotes AEC-Q101 qualification and PPAP capability-critical for automotive use-while the non-S version lacks formal automotive validation despite identical electrical behavior.

What does the "S" prefix in SBC808-25LT1G signify?

The "S" prefix in SBC808-25LT1G indicates that the device meets AEC-Q101 stress test requirements and is PPAP-capable for automotive applications. It also denotes unique site and process control tracking, enabling full traceability for Tier 1 suppliers. This prefix is defined in the Features section of the onsemi datasheet and distinguishes it from commercial-grade variants like BC808-25LT1G.

Does the SBC808-25LT1G support operation at 150 °C junction temperature?

Yes, the SBC808-25LT1G is rated for junction and storage temperatures from −55 °C to +150 °C per the Absolute Maximum Ratings table. Operation at T_J = 150 °C is permissible provided power dissipation remains within derated limits-e.g., PD ≤ 126 mW at 100 °C ambient-and thermal design accounts for R_JA = 556 °C/W on standard FR-5 board.

What is the typical current-gain bandwidth product (f_T) of the SBC808-25LT1G?

The SBC808-25LT1G has a minimum f_T of 100 MHz, measured at I_C = −10 mA, V_CE = −5.0 V, and f = 100 MHz. This value is specified in the Small-Signal Characteristics table and confirms suitability for audio-frequency amplification and fast-switching applications where gain stability up to ~10 MHz is required.

SBC808-25LT1G 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):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 25 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 50mA, 500mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 160 @ 100mA, 1V

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)

SBC808-25LT1G FAQ

1.How can I place an order for SBC808-25LT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SBC808-25LT1G 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 SBC808-25LT1G reliable?

The price and inventory of SBC808-25LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBC808-25LT1G is usually 5 days.

3.What payment methods are accepted for SBC808-25LT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBC808-25LT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SBC808-25LT1G?

SBC808-25LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SBC808-25LT1G 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 SBC808-25LT1G?

For technical support, including SBC808-25LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBC808-25LT1G requirements.

6.How does Aetrix verify that SBC808-25LT1G is sourced from the original manufacturer or authorized distributors?

All SBC808-25LT1G 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 SBC808-25LT1G meets industry standards.

7.What is the process for return or replacement of SBC808-25LT1G?

All SBC808-25LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SBC808-25LT1G, 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 SBC808-25LT1G part is unused and in its original packaging.

Return procedure for SBC808-25LT1G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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