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onsemi BC847CTT1G
- Part No.:
- BC847CTT1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
BC847CTT1G.pdf
- Description:
- TRANS NPN 45V 0.1A SC75 SOT416
- Quantity:
- Payment:
- Shipping:
Inventory:9,950
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Product details
Overview
BC847CTT1G from onsemi is an NPN silicon general-purpose transistor in SC-75/SOT-416 package, rated for 45 V VCEO, 100 mA IC, and 200 mW PD (min pad), with hFE = 420–800 at IC = 10 mA, used in low-power amplification and switching circuits in consumer and industrial electronics.
For engineers reviewing the BC847CTT1G datasheet, pinout, applications, or equivalent options, key selection factors include its AEC-Q101 qualification status, Pb-free compliance, thermal resistance of 600 °C/W (min pad), and guaranteed hFE binning across temperature and current conditions.
Technical Context
The BC847CTT1G belongs to the BC847 series of planar epitaxial NPN transistors optimized for surface-mount amplifier and switch applications. Its design emphasizes stable DC current gain (hFE ≥ 420 at IC = 10 mA, VCE = 5 V) and low saturation voltage (VCE(sat) ≤ 0.6 V at IC = 100 mA, IB = 5 mA).
It operates across −55 °C to +150 °C junction temperature range and features fT = 100 MHz, Cobo = 4.5 pF, and NF = 10 dB at 1 kHz - confirming suitability for audio-frequency amplification and low-noise signal conditioning where compact size and thermal efficiency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage headroom in low-voltage switching rails. |
| IC | 100 mA - Continuous collector current rating; sets upper limit for load-driving capability in discrete bias networks. |
| hFE | 420–800 - Guaranteed DC current gain range at IC = 10 mA; enables predictable base drive sizing in linear and saturated operation. |
| VCE(sat) | ≤ 0.6 V at IC/IB = 20 - Low saturation voltage minimizes power loss and heating in digital logic interface and relay driver stages. |
| fT | 100 MHz - Current-gain bandwidth product; supports stable small-signal amplification up to audio and low-RF frequencies. |
| RJA | 600 °C/W (min pad) - Junction-to-ambient thermal resistance; determines required PCB copper area for thermal management at full load. |
Pinout & Package
BC847CTT1G uses the SC-75/SOT-416 package (Case 463), a 3-pin surface-mount outline measuring 1.60 × 0.80 × 0.80 mm with 1.00 mm pitch. The package supports automated placement and reflow soldering on FR-4 boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased junction; requires current-limited drive to achieve specified hFE and VCE(sat). |
| 2 | Emiter | Common reference node in common-emitter configuration; connects to ground or low-impedance return path. |
| 3 | Collector | Output current sink terminal; interfaces with load, pull-up resistor, or next-stage input in amplifier/switch topologies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and infotainment modules. |
| Pb-free (G suffix) | RoHS-compliant termination and packaging; eliminates lead-based solder compatibility concerns in modern assembly lines. |
| High hFE bin (C grade) | Guaranteed minimum hFE = 420 ensures consistent gain across production lots, reducing need for post-manufacture trimming or feedback compensation. |
| Low VBE(sat) | ≤ 0.9 V at IC = 100 mA enables reliable turn-on from 3.3 V or 5 V microcontroller GPIOs without external level-shifting. |
Applications
| Audio Pre-amplifier Stage | Microcontroller GPIO Driver |
|---|---|
Use Scenario: Amplifying weak analog signals from electret microphones or sensor outputs prior to ADC sampling. IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed bias network providing 20–40 dB voltage gain in 20 Hz–20 kHz band. Use Value: High hFE and low NF = 10 dB ensure minimal added noise and stable gain without active feedback components. |
Use Scenario: Driving LEDs, small relays, or MOSFET gates from 3.3 V or 5 V MCU output pins. IC Role / Device Role / Timing Role: Low-side switch with saturated operation, controlled by digital logic-level signals. Use Value: VCE(sat) ≤ 0.6 V limits power dissipation to <10 mW at 100 mA, enabling direct connection without heat sinking. |
| Industrial Sensor Interface | Power Supply Enable Switch |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor, RTD bridges) into ADC inputs. IC Role / Device Role / Timing Role: Emitter-follower buffer providing high input impedance and low output impedance. Use Value: Stable hFE over −40 °C to +85 °C ensures consistent buffering performance across environmental operating ranges. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., 3.3 V LDO output) via MCU control signal. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS/NMOS gate drive in power sequencing circuits. Use Value: Fast turn-on (fT = 100 MHz) and low Cobo = 4.5 pF minimize delay and ringing during rail activation/deactivation. |
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 |
|---|---|---|---|
| BC847BW,115 (Nexperia) | Same SC-75 package, hFE = 420–800 (C grade), but RJA = 500 °C/W (1.0×1.0 in pad); no AEC-Q101 claim. | Not qualified for automotive use; suitable for commercial-grade consumer products with higher thermal margin. | Select when AEC-Q101 is not required and board layout allows larger thermal pad. |
| MMBT4401LT1G (onsemi) | Same SOT-416 package, VCEO = 40 V, hFE = 100–300 (lower gain bin), fT = 250 MHz. | Better high-frequency response but lower DC gain; less suitable for precision biasing or low-current amplification. | Prefer for RF-coupled switching or where faster transition times outweigh gain stability needs. |
Compared with BC847BW,115 and MMBT4401LT1G, the BC847CTT1G uniquely combines AEC-Q101 qualification, highest guaranteed hFE bin, and industry-standard thermal derating curves - making it optimal for automotive and industrial designs requiring both reliability and predictable analog behavior.
Availability
BC847CTT1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer audio pre-amplifiers requiring stable component supply and long-term manufacturability.
Supply support for BC847CTT1G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The BC847CTT1G belongs to onsemi's general-purpose bipolar transistor family, engineered for high-volume, cost-sensitive applications demanding proven reliability, tight parametric consistency, and seamless integration into automated SMT assembly lines.
FAQ
What is the maximum junction temperature rating for BC847CTT1G?
The BC847CTT1G has a specified junction and storage temperature range of −55 °C to +150 °C. This wide range supports operation in harsh environments such as automotive engine compartments and industrial control cabinets. Derating of power dissipation begins above 25 °C ambient, with PD decreasing by 1.6 mW/°C on FR-4 with minimum pad - ensuring safe thermal margins even at elevated ambient temperatures.
Is BC847CTT1G pin-compatible with BC847BTT1G?
Yes, BC847CTT1G is pin-compatible with BC847BTT1G and BC847ATT1G - all share identical SC-75/SOT-416 package, pin 1 = Base, pin 2 = Emitter, pin 3 = Collector. The only functional difference lies in hFE binning: BC847CTT1G guarantees hFE = 420–800, while BC847BTT1G specifies 200–450. No PCB changes are needed when upgrading within the BC847 series.
Does BC847CTT1G meet automotive qualification standards?
Yes, BC847CTT1G is AEC-Q101 qualified and PPAP capable, meeting stress test requirements for temperature cycling, high-temperature reverse bias, and electrostatic discharge. It is explicitly listed in onsemi's automotive-grade portfolio and carries the "G" suffix denoting Pb-free compliance - making BC847CTT1G suitable for safety-critical and mission-relevant automotive subsystems.
What is the typical noise figure of BC847CTT1G and where is it relevant?
The BC847CTT1G has a noise figure of 10 dB at IC = 0.2 mA, VCE = 5 V, RS = 2.0 kΩ, f = 1 kHz, and BW = 200 Hz. This value is directly applicable in low-level analog signal conditioning - such as microphone pre-amplifiers or sensor front-ends - where minimizing added noise preserves signal integrity before digitization.
How does the thermal resistance of BC847CTT1G vary with PCB pad size?
BC847CTT1G's thermal resistance depends on PCB layout: RJA = 600 °C/W with minimum pad (FR-4), but improves to 400 °C/W with a 1.0 × 1.0 inch copper pad. This 33% reduction in thermal resistance allows higher continuous current handling or extended operation at elevated ambient temperatures - a critical consideration in space-constrained industrial modules.
BC847CTT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-75, SOT-416
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75, SOT-416
BC847CTT1G FAQ
1.How can I place an order for BC847CTT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847CTT1G 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 BC847CTT1G reliable?
The price and inventory of BC847CTT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CTT1G is usually 5 days.
3.What payment methods are accepted for BC847CTT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CTT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847CTT1G?
BC847CTT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847CTT1G 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 BC847CTT1G?
For technical support, including BC847CTT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CTT1G requirements.
6.How does Aetrix verify that BC847CTT1G is sourced from the original manufacturer or authorized distributors?
All BC847CTT1G 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 BC847CTT1G meets industry standards.
7.What is the process for return or replacement of BC847CTT1G?
All BC847CTT1G units undergo pre-shipment inspection (PSI). If there is an issue with BC847CTT1G, 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 BC847CTT1G part is unused and in its original packaging.
Return procedure for BC847CTT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847CTT1G Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
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MMBT3904LT1G
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MMBT3906-7-F
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
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BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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