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onsemi BC848BMTF
- Part No.:
- BC848BMTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC848BMTF.pdf
- Description:
- TRANS NPN 30V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:153,000
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Product details
Overview
BC848BMTF from Fairchild Semiconductor is an NPN epitaxial silicon transistor in SOT-23 package, rated for VCEO = 30 V, IC = 100 mA, and hFE = 200–450 (Class B), with VCE(sat) ≤ 250 mV at IC = 10 mA / IB = 0.5 mA. It serves as a general-purpose switching and amplification device in low-voltage signal paths, power management blocks, and interface circuits.
For engineers reviewing the BC848BMTF datasheet, pinout, applications, or equivalent options, key selection criteria include its SOT-23 footprint compatibility, verified hFE classification band, DC saturation voltage under defined drive conditions, thermal resistance (RθJA = 403 °C/W), and noise figure (2.0–10.0 dB) across operating current ranges.
Technical Context
The BC848BMTF operates as a discrete bipolar junction transistor with fixed NPN polarity, optimized for linear amplification and saturated switching in ambient temperatures from –65 °C to +150 °C. Its hFE range (200–450) and low VBE(on) (580–700 mV at IC = 2 mA) support stable biasing in emitter-follower and common-emitter configurations.
It exhibits fT = 300 MHz at VCE = 5 V / IC = 10 mA, Cob = 3.5–6.0 pF at VCB = 10 V, and Cib = 9 pF - confirming suitability for audio-frequency and low-MHz digital switching, but not RF front-end or high-speed logic buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 30 V - Maximum collector-emitter voltage before breakdown; defines safe operation in 24 V rail and lower logic-level switching. |
| IC (DC) | 100 mA - Continuous collector current limit; supports load switching up to ~100 mA with adequate heatsinking. |
| hFE Class | B (200–450) - Confirmed DC current gain band; enables predictable base drive sizing for consistent saturation in switching designs. |
| VCE(sat) | ≤250 mV @ IC=10 mA/IB=0.5 mA - Low saturation voltage reduces conduction loss and self-heating in on-state operation. |
| fT | 300 MHz - Current gain-bandwidth product; validates usable gain up to mid-VHF range, suitable for audio preamps and clock buffers. |
| RθJA | 403 °C/W - Junction-to-ambient thermal resistance on standard FR-4 PCB; requires derating above 25 °C (2.48 mW/°C). |
Pinout & Package
SOT-23 3-lead plastic surface-mount package with standard pin assignment: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input terminal | Receives forward-biased current to enable conduction; requires series resistor to limit IB per hFE and load requirements. |
| 2 (Emitter) | Current return path | Connected to ground or low-side reference; establishes common node for current sourcing/sinking in common-emitter topology. |
| 3 (Collector) | Output current terminal | Drives load between supply rail and collector; must remain within VCEO and power dissipation limits during switching transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Switching & amplification capability | Validated for both saturated switching (low VCE(sat)) and small-signal amplification (fT = 300 MHz, NF = 2.0–10.0 dB). |
| Automated assembly compatibility | Designed for pick-and-place and reflow soldering in thick/thin-film circuits; SOT-23 footprint aligns with IPC-7351 standards. |
| Thermal robustness | Junction temperature rating of 150 °C and storage range of –65 to +150 °C support industrial ambient operation without derating. |
| Low-noise performance | Noise figure of 2.0–10.0 dB at IC = 200 μA enables use in precision analog front-ends where signal integrity is critical. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Discrete NPN switch providing current gain and level translation between MCU I/O and LED anode/cathode. Use Value: VCE(sat) ≤ 250 mV ensures minimal voltage drop and efficient LED brightness control without external driver ICs. |
Use Scenario: Isolating and buffering digital signals between mixed-voltage subsystems (e.g., 3.3 V MCU to 5 V peripheral). IC Role / Device Role / Timing Role: Level-shifting transistor in open-collector configuration with pull-up resistor. Use Value: hFE ≥ 200 guarantees reliable turn-on with typical GPIO output currents (≤4 mA), avoiding marginal switching. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
Use Scenario: Low-noise voltage amplifier for electret microphone output in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for gain stability. Use Value: Noise figure of 2.0–10.0 dB at 1 kHz and fT = 300 MHz preserve signal fidelity across audio bandwidth (20 Hz–20 kHz). |
Use Scenario: Enabling/disabling 12 V auxiliary rails via MCU-controlled low-side switch. IC Role / Device Role / Timing Role: Saturated NPN switch controlling PMOS gate or relay coil with controlled rise/fall times. Use Value: IC = 100 mA rating and VCEO = 30 V accommodate typical enable loads (e.g., <100 mA, <24 V), ensuring margin against transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BMTF | VCEO = 45 V, VCE(sat) ≤ 250 mV (same test condition), hFE = 200–450 (identical class) | Higher collector-emitter breakdown allows use in 36 V systems; otherwise functionally interchangeable in 24 V and below designs. | Select BC847BMTF when higher voltage margin is required without changing layout or drive network. |
| MMBT3904LT1G | VCEO = 40 V, hFE = 100–300 (lower max), RθJA = 357 °C/W (better thermal performance) | Lower hFE upper bound may require increased base drive; improved thermal resistance supports higher continuous current in compact layouts. | Choose MMBT3904LT1G when thermal management is critical and gain variation is acceptable in production tolerance bands. |
Compared with BC848BMTF, BC847BMTF offers higher voltage headroom while maintaining identical gain classification and saturation behavior, whereas MMBT3904LT1G trades some hFE range for better thermal dissipation - making each alternative optimal for distinct design priorities: voltage margin vs. thermal density.
Availability
BC848BMTF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface isolation, audio pre-amplifier stages, and power supply enable switches requiring stable component supply and SOT-23 footprint consistency.
Supply support for BC848BMTF 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; its legacy products maintain broad industry adoption and second-source availability.
The BC848BMTF belongs to Fairchild's BC846–BC850 family of general-purpose NPN transistors, designed for cost-sensitive, high-volume applications requiring reliable switching and amplification in consumer, industrial, and computing equipment.
FAQ
What is the maximum collector-emitter voltage rating for BC848BMTF?
The BC848BMTF has a maximum collector-emitter voltage (VCEO) rating of 30 V at TA = 25 °C. This rating applies under DC conditions and must be derated at elevated ambient temperatures per the device's thermal characteristics. Exceeding this voltage risks avalanche breakdown and permanent damage to the BC848BMTF.
Is BC848BMTF pin-compatible with BC847BMTF?
Yes, BC848BMTF is pin-compatible with BC847BMTF - both use the SOT-23 package with identical pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector). However, BC847BMTF has a higher VCEO (45 V vs. 30 V), so substituting BC848BMTF for BC847BMTF in >30 V applications may compromise reliability.
What hFE range does BC848BMTF guarantee?
The BC848BMTF is classified as "B" grade, guaranteeing a DC current gain (hFE) range of 200 to 450 when measured at VCE = 5 V and IC = 2 mA. This band is laser-trimmed during manufacturing and marked as "8CB" on the device top surface.
Can BC848BMTF be used in audio amplification stages?
Yes, BC848BMTF is suitable for low-noise audio pre-amplifier stages due to its specified noise figure of 2.0–10.0 dB at 1 kHz (IC = 200 μA, RG = 2 kΩ) and fT = 300 MHz. Its performance is validated in common-emitter configurations with emitter degeneration for stable gain and bandwidth control in BC848BMTF-based designs.
What is the thermal resistance of BC848BMTF on a standard PCB?
The BC848BMTF has a junction-to-ambient thermal resistance (RθJA) of 403 °C/W when mounted on a standard FR-4 PCB (76 mm × 114 mm × 1.57 mm) with minimum land pattern. Power dissipation must be limited to 310 mW at 25 °C ambient, decreasing by 2.48 mW per °C rise above that temperature.
BC848BMTF 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:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 30 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 310 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BC848BMTF FAQ
1.How can I place an order for BC848BMTF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC848BMTF 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 BC848BMTF reliable?
The price and inventory of BC848BMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC848BMTF is usually 5 days.
3.What payment methods are accepted for BC848BMTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC848BMTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC848BMTF?
BC848BMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC848BMTF 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 BC848BMTF?
For technical support, including BC848BMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC848BMTF requirements.
6.How does Aetrix verify that BC848BMTF is sourced from the original manufacturer or authorized distributors?
All BC848BMTF 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 BC848BMTF meets industry standards.
7.What is the process for return or replacement of BC848BMTF?
All BC848BMTF units undergo pre-shipment inspection (PSI). If there is an issue with BC848BMTF, 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 BC848BMTF part is unused and in its original packaging.
Return procedure for BC848BMTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC848BMTF Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
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MMBT2222A-TP
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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