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onsemi BC846BMTF
- Part No.:
- BC846BMTF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC846BMTF.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,547
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Product details
Overview
BC846BMTF from ON Semiconductor is an NPN epitaxial silicon transistor in SOT-23 package, rated for 65 V VCEO, 100 mA IC, and 310 mW PD, with hFE = 200–450 (Class B), optimized for low-noise switching and small-signal amplification in portable power management and signal conditioning circuits.
For engineers reviewing the BC846BMTF datasheet, pinout, applications, or equivalent options, key selection criteria include VCEO/VCBO ratings, hFE classification band, saturation voltage at defined IC/IB, thermal resistance (RθJA = 403 °C/W), and SOT-23 footprint compatibility in high-density PCB layouts.
Technical Context
The BC846BMTF operates as a general-purpose NPN bipolar junction transistor with fixed emitter-base and collector-base junction geometry, supporting linear amplification (VCE = 5 V, IC = 2 mA) and saturated switching (IC/IB = 10 or 20). Its fT = 300 MHz enables RF-capable small-signal use up to VHF bands.
Thermal performance is defined by RθJA = 403 °C/W on FR-4 PCB (76 mm × 114 mm, minimum land pattern), and absolute maximum ratings include TJ = 150 °C and TSTG = −65 to +150 °C - confirming suitability for industrial ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 24–48 V supply rail switching. |
| IC (DC) | 100 mA - Continuous collector current limit; supports load switching up to ~100 mA with adequate heatsinking. |
| hFE (Class B) | 200–450 - DC current gain range at VCE = 5 V, IC = 2 mA; ensures predictable base drive sizing for digital logic interfacing. |
| VCE(sat) | 90–250 mV @ IC = 10 mA, IB = 0.5 mA - Low saturation voltage minimizes conduction loss in active-low switch configurations. |
| fT | 300 MHz - Current gain bandwidth product; validates usability in audio preamps and sub-300 MHz RF front-end stages. |
| RθJA | 403 °C/W - Junction-to-ambient thermal resistance on standard FR-4 board; requires derating above 25 °C (2.48 mW/°C). |
Pinout & Package
SOT-23 3-lead plastic surface-mount package (JEDEC TO-236AB), 1.3 mm × 2.9 mm × 1.0 mm body, gull-wing leads, tape-and-reel packaging (TF suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input terminal | Receives forward-biased current to enable conduction; requires series resistor for TTL/CMOS-level drive compatibility. |
| 2 (Emitter) | Current return path | Connected to ground or low-side reference; establishes common node for current mirror or emitter-follower biasing. |
| 3 (Collector) | Output current terminal | Drives load between VCC and collector; polarity and voltage rating must match system rail and flyback protection needs. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | 90–250 mV at IC/IB = 20 ensures <100 mW conduction loss in 5 V logic-controlled switches. |
| High hFE Class B | 200–450 gain range reduces required base drive current, easing interface with microcontroller GPIOs. |
| 300 MHz fT | Supports stable small-signal amplification up to VHF frequencies without external compensation. |
| Low noise figure | 2.0–10.0 dB (1 kHz, 200 μA) enables use in microphone preamplifiers and sensor signal conditioning. |
| SOT-23 footprint | Standardized 3-pin package allows automated placement and reflow compatibility across consumer and industrial PCB lines. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs. IC Role / Device Role / Timing Role: Low-side NPN switch controlled by digital output pin. Use Value: VCE(sat) ≤ 250 mV limits LED current-path loss; hFE ≥ 200 ensures full saturation with ≤ 100 μA base drive. |
Use Scenario: Level-shifting and current boosting between 1.8 V/3.3 V logic and 5 V peripherals. IC Role / Device Role / Timing Role: Digital buffer amplifier with inverted output polarity. Use Value: Fast turn-on/off (enabled by fT = 300 MHz) supports >1 MHz toggle rates; SOT-23 saves board space in dense MCU modules. |
| Audio Preamp Stage | Power Supply Enable Switch |
Use Scenario: Low-noise amplification of electret microphone output in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration. Use Value: Noise figure ≤ 10.0 dB at 1 kHz and IC = 200 μA meets SNR requirements for voice-band analog front ends. |
Use Scenario: Enabling/disabling 12 V auxiliary rails in industrial control modules. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by supervisor IC. Use Value: VCEO = 65 V safely accommodates 12 V rail transients; 150 °C max junction temperature supports extended operation in enclosed 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 |
|---|---|---|---|
| BC847BMTF | VCEO = 45 V (vs. 65 V); same hFE Class B, SOT-23 package, identical pinout. | Not suitable for 60 V transient-prone rails; acceptable in 5–24 V logic-level systems with tighter voltage margins. | Select BC847BMTF only when VCEO derating is acceptable and lower cost is prioritized. |
| MMBT3904LT1G | hFE = 100–300 (Class A/B overlap); VCEO = 40 V; RθJA = 357 °C/W; same SOT-23 footprint. | Lower voltage rating and narrower hFE range reduce margin in precision biasing or high-transient environments. | Use MMBT3904LT1G where legacy design reuse or second-source qualification is required, but verify VCEO headroom. |
Compared with BC846BMTF, BC847BMTF offers identical gain and package but reduced voltage capability, while MMBT3904LT1G provides broader industry adoption at the cost of lower VCEO and thermal margin - making BC846BMTF optimal for 65 V-rated industrial switching where reliability under transient stress is critical.
Availability
BC846BMTF is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, audio preamplifier stages, and power supply enable switches requiring stable component supply and consistent hFE binning.
Supply support for BC846BMTF 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BC846BMTF belongs to ON Semiconductor's general-purpose bipolar transistor family designed for reliable, cost-effective switching and amplification in space-constrained, high-volume applications - emphasizing manufacturability, thermal robustness, and parametric consistency.
FAQ
What is the hFE range for BC846BMTF?
The BC846BMTF has a guaranteed DC current gain (hFE) range of 200 to 450 when measured at VCE = 5 V and IC = 2 mA. This Class B classification ensures predictable base drive requirements across production lots and supports stable biasing in amplifier and switching designs without gain-dependent recalibration.
Can BC846BMTF replace BC847BMTF in existing designs?
BC846BMTF can replace BC847BMTF only if the circuit requires VCEO ≥ 65 V - because BC846BMTF is rated for 65 V versus BC847BMTF's 45 V. Both share identical SOT-23 pinout, hFE Class B, and thermal specs, so layout and drive conditions remain unchanged, but voltage margin must be verified per application.
What is the maximum power dissipation of BC846BMTF?
The BC846BMTF has a maximum power dissipation (PD) of 310 mW at TA = 25 °C, with a derating factor of 2.48 mW/°C above that temperature. On a standard FR-4 PCB (76 mm × 114 mm), this corresponds to RθJA = 403 °C/W - meaning junction temperature rises ~400 °C per watt, necessitating thermal design review for sustained >100 mW operation.
Is BC846BMTF suitable for RF applications?
Yes, BC846BMTF is suitable for RF applications up to ~300 MHz due to its specified fT = 300 MHz at VCE = 5 V and IC = 10 mA. It has been used in VHF oscillator buffers and low-power receiver front-ends, though impedance matching and layout parasitics must be controlled to maintain stability and gain.
What does the "TF" suffix mean in BC846BMTF?
The "TF" suffix in BC846BMTF indicates tape-and-reel packaging - specifically, 3000 units per reel in EIA-481-compliant carrier tape, optimized for automated SMT assembly. The "M" denotes SOT-23 package, and "B" specifies hFE Class B (200–450), completing the full ordering code per ON Semiconductor's BC846/D datasheet.
BC846BMTF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 65 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
BC846BMTF FAQ
1.How can I place an order for BC846BMTF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BMTF 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 BC846BMTF reliable?
The price and inventory of BC846BMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BMTF is usually 5 days.
3.What payment methods are accepted for BC846BMTF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BMTF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BMTF?
BC846BMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BMTF 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 BC846BMTF?
For technical support, including BC846BMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BMTF requirements.
6.How does Aetrix verify that BC846BMTF is sourced from the original manufacturer or authorized distributors?
All BC846BMTF 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 BC846BMTF meets industry standards.
7.What is the process for return or replacement of BC846BMTF?
All BC846BMTF units undergo pre-shipment inspection (PSI). If there is an issue with BC846BMTF, 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 BC846BMTF part is unused and in its original packaging.
Return procedure for BC846BMTF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BMTF Tags
-
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
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BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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