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onsemi BC848CLT1
- Part No.:
- BC848CLT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
BC848CLT1.pdf
- Description:
- TRANS NPN 30V 100MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,810
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Product details
Overview
BC848CLT1 from onsemi is an NPN silicon general-purpose transistor in SOT-23 package, rated for VCEO = 30 V, IC = 100 mA, and hFE = 420–800 (at IC = 2.0 mA, VCE = 5.0 V), with fT = 100 MHz - widely used in low-power switching and amplification circuits in consumer and industrial control modules.
For engineers reviewing the BC848CLT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating data, SOT-23 terminal mapping, real-world use cases, and two validated alternative parts - all aligned to ON Semiconductor's BC846/847/848 family documentation (Rev. 6, June 2004).
Technical Context
The BC848CLT1 operates as a discrete NPN bipolar junction transistor optimized for linear amplification and saturated switching in low-voltage DC circuits. Its hFE binning (C-grade) guarantees minimum DC current gain of 420 at 2 mA collector current, and its 100 MHz fT supports audio-frequency and low-speed digital signal conditioning.
Thermal performance is defined for two board conditions: 225 mW dissipation on FR-5 (derate 1.8 mW/°C above 25°C) and 300 mW on alumina substrate (derate 2.4 mW/°C). ESD ratings exceed 4000 V (HBM) and 400 V (MM), confirming suitability for manual assembly and board-level handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - maximum safe collector-emitter voltage before breakdown; defines upper rail limit in 24 V logic or sensor interface stages. |
| IC (continuous) | 100 mA - continuous collector current rating; supports relay drivers, LED buffers, and small-signal load switching. |
| hFE (min) | 420 at IC = 2.0 mA, VCE = 5.0 V - high-current-gain bin ensures stable biasing with minimal base drive in amplifier designs. |
| fT | 100 MHz - unity-gain bandwidth; enables reliable operation up to ~10 MHz for small-signal amplification without phase loss. |
| VCE(sat) | 0.25 V max at IC = 10 mA / IB = 0.5 mA - low saturation voltage reduces power loss in switching applications. |
| RJA (FR-5) | 556 °C/W - thermal resistance determines junction temperature rise; requires layout-aware copper pour for >50 mW sustained loads. |
Pinout & Package
SOT-23 (Case 318, Style 6) surface-mount package with 3-pin configuration, JEDEC-compliant footprint (2.0 × 1.25 × 0.95 mm), moisture sensitivity level 1, and Pb-free option available (BC848CLT1G).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input node; requires current-limited drive (typically 0.1–5 mA) to achieve full saturation or linear operation. |
| 2 | Emitter | Common reference terminal; connected to ground or low-side return path; carries full load current in common-emitter topology. |
| 3 | Collector | Output/power terminal; connects to load (e.g., resistor, LED, relay coil); handles up to 100 mA DC with <30 V swing. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-free packaging option | BC848CLT1G variant meets RoHS compliance without sacrificing solderability or thermal performance. |
| High hFE bin (C-grade) | Guarantees hFE ≥ 420 at 2 mA, enabling single-transistor amplifiers with >20 dB voltage gain at audio frequencies. |
| ESD robustness | HBM >4000 V and MM >400 V allow direct handling during prototyping and reduce need for external protection diodes. |
| Low VCE(sat) | ≤0.25 V at 10 mA ensures <2.5 mW conduction loss - critical for battery-powered sensor nodes and portable devices. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs where native GPIO current capability is insufficient. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, turning LED on/off via base current control. Use Value: Low VCE(sat) minimizes voltage drop across transistor, preserving LED forward voltage margin; hFE ≥ 420 allows 50 µA base drive to switch 20 mA load. |
Use Scenario: Extending digital output capability of resource-constrained microcontrollers (e.g., PIC12F, STM32G0) for driving higher-current peripherals. IC Role / Device Role / Timing Role: Discrete level-shifting and current-boosting stage between MCU I/O pin and external load (e.g., buzzer, solenoid). Use Value: SOT-23 footprint saves PCB area versus TO-92; guaranteed C-bin hFE ensures consistent turn-on behavior across production batches. |
| Audio Pre-amplifier Stage | Industrial Sensor Interface |
|
Use Scenario: Amplifying weak analog signals (e.g., electret microphone output) prior to ADC sampling in embedded audio systems. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased in active region with emitter degeneration for linearity. Use Value: fT = 100 MHz provides ample bandwidth for 20 Hz–20 kHz audio; low NF = 4.0 dB (at 1 kHz) preserves signal-to-noise ratio. |
Use Scenario: Converting 4–20 mA loop signals or thermistor voltage dividers into clean digital logic levels for PLC input modules. IC Role / Device Role / Timing Role: Signal conditioning switch or comparator front-end, providing isolation and gain before Schmitt-trigger input. Use Value: VCEO = 30 V withstands transient surges on industrial field wiring; TJ range of −55°C to +150°C supports operation in unheated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847CLT1 | VCEO = 45 V (vs. 30 V), same hFE range (420–800), identical SOT-23 package and pinout. | Higher voltage headroom suits 36 V automotive subsystems or 24 V industrial rails with ripple margin. | Select BC847CLT1 when operating above 25 V DC or requiring enhanced breakdown safety margin. |
| MMBT3904LT1G | hFE min = 100 (vs. 420), VCEO = 40 V, same SOT-23 package but different marking and JEDEC registration. | Lower gain necessitates higher base drive; preferred in cost-sensitive, non-critical switching where gain consistency is secondary. | Choose MMBT3904LT1G for legacy design reuse or high-volume cost optimization where C-bin gain is not required. |
Compared with BC848CLT1, BC847CLT1 offers higher voltage tolerance without trade-offs in gain or package, while MMBT3904LT1G sacrifices guaranteed high hFE for broader availability and lower unit cost - making BC848CLT1 optimal for precision gain-dependent analog or low-drive digital interfaces.
Availability
BC848CLT1 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and industrial sensor interfaces requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for BC848CLT1 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BC848CLT1 belongs to onsemi's BC846/847/848 series of preferred general-purpose transistors - designed for high-reliability, cost-effective discrete amplification and switching in space-constrained consumer and industrial PCBs.
FAQ
What is the maximum collector-emitter voltage rating for BC848CLT1?
The BC848CLT1 has a maximum collector-emitter voltage (VCEO) rating of 30 V DC. This value is specified under test condition IC = 10 mA and defines the absolute upper limit before avalanche breakdown occurs. Exceeding 30 V risks irreversible device failure, and design margins should keep operating VCE ≤ 24 V for reliability in 24 V systems. The BC848CLT1 datasheet (Rev. 6, June 2004) confirms this rating applies specifically to BC848 and BC849 variants.
Does BC848CLT1 have a Pb-free version, and how is it marked?
Yes, the Pb-free version is designated BC848CLT1G and carries the same "1L" top-side marking as the standard BC848CLT1. Both share identical SOT-23 mechanical dimensions and electrical specifications; the G suffix indicates compliance with RoHS Directive 2011/65/EU and use of lead-free terminations. The BC848CLT1G is shipped in tape-and-reel format (3,000 units per reel) and maintains the same moisture sensitivity level (MSL 1) and thermal characteristics as the standard part.
What is the guaranteed DC current gain (hFE) range for BC848CLT1 at typical operating conditions?
The BC848CLT1 is binned to the "C" gain group, guaranteeing hFE ≥ 420 at IC = 2.0 mA and VCE = 5.0 V, with a typical value of 520 and maximum of 800 under those conditions. This high-minimum gain enables predictable biasing in amplifier designs and reduces sensitivity to base resistor tolerance. The BC848CLT1 datasheet explicitly lists these values in the "ON CHARACTERISTICS" table and distinguishes them from A- and B-grade variants.
Can BC848CLT1 be used in linear amplification applications, and what limits its bandwidth?
Yes, BC848CLT1 supports linear amplification with a current-gain–bandwidth product (fT) of 100 MHz, enabling stable small-signal gain up to ~10 MHz. Its usable bandwidth is limited by internal junction capacitances (Cobo = 4.5 pF max) and the hFE roll-off above 1 MHz. For audio applications (20 Hz–20 kHz), the BC848CLT1 exhibits flat gain response and low noise figure (NF = 4.0 dB at 1 kHz), making it suitable for pre-amplifier stages where fidelity and low distortion are required.
How does thermal derating work for BC848CLT1 on a standard FR-5 PCB?
On an FR-5 board (1.0 × 0.75 × 0.062 in), the BC848CLT1 has a total device dissipation (PD) of 225 mW at TA = 25°C, derating linearly by 1.8 mW/°C above that temperature. At 75°C ambient, maximum allowable power drops to 225 mW − (50°C × 1.8 mW/°C) = 135 mW. This derating is based on measured RJA = 556 °C/W and must be applied in layouts without added copper pour or airflow; exceeding it risks junction temperatures beyond the −55°C to +150°C operating range.
BC848CLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BC848CLT1 FAQ
1.How can I place an order for BC848CLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC848CLT1 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 BC848CLT1 reliable?
The price and inventory of BC848CLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848CLT1 is usually 5 days.
3.What payment methods are accepted for BC848CLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848CLT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC848CLT1?
BC848CLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC848CLT1 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 BC848CLT1?
For technical support, including BC848CLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848CLT1 requirements.
6.How does Aetrix verify that BC848CLT1 is sourced from the original manufacturer or authorized distributors?
All BC848CLT1 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 BC848CLT1 meets industry standards.
7.What is the process for return or replacement of BC848CLT1?
All BC848CLT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC848CLT1, 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 BC848CLT1 part is unused and in its original packaging.
Return procedure for BC848CLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC848CLT1 Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
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MMBT2222A-7-F
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
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MMBTA06LT1G
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