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onsemi BC847CTT1
- Part No.:
- BC847CTT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
BC847CTT1.pdf
- Description:
- TRANS NPN 45V 0.1A SC75 SOT416
- Quantity:
- Payment:
- Shipping:
Inventory:3,518
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Product details
Overview
BC847CTT1 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/VCE = 5 V. It serves as a low-power switching and amplification device in compact surface-mount signal paths, including sensor interface stages and logic-level translation circuits.
For engineers reviewing the BC847CTT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its guaranteed hFE range, thermal resistance of 600 °C/W (min pad), VCE(sat) ≤ 0.6 V at IC/IB = 20, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The BC847CTT1 operates as a discrete bipolar junction transistor with fixed NPN polarity, optimized for linear amplification and saturated switching in low-voltage, low-current analog and digital signal chains. Its electrical behavior is defined by DC current gain (hFE) spanning 420–800, fT = 100 MHz, and Cobo = 4.5 pF - enabling stable operation up to mid-VHF frequencies with minimal capacitive loading.
Thermal performance depends on PCB layout: RJA is 600 °C/W on FR-4 with minimum pad, but improves to 400 °C/W with 1.0 × 1.0 inch copper area. Junction temperature is rated from −55 °C to +150 °C, supporting industrial and under-hood automotive environments when derated per 1.6 mW/°C above 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum collector-emitter voltage before breakdown; sets safe operating range for 3.3 V/5 V rail-referenced switching. |
| IC (max) | 100 mA - Continuous collector current limit; supports load switching up to ~50 mA with 2× safety margin. |
| hFE | 420–800 @ IC = 10 mA, VCE = 5 V - High, tightly binned DC gain enables predictable biasing in amplifier stages. |
| VCE(sat) | ≤ 0.6 V @ IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss in switching applications. |
| fT | 100 MHz - Current-gain bandwidth product; supports small-signal amplification up to ~10–20 MHz with usable gain. |
| RJA | 600 °C/W (min pad) - Thermal resistance dictates required copper area for thermal management in space-constrained layouts. |
Pinout & Package
BC847CTT1 uses the SC-75/SOT-416 package (Case 463), measuring 1.60 × 0.80 × 0.80 mm with 1.00 mm pitch. The package is Pb-free and marked "1G".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires current-limited drive (typically 0.1–5 mA) to bias transistor into active or saturation region. |
| 2 | Emitter | Current return path; connected to ground or low-side reference; forms common-emitter configuration with collector output. |
| 3 | Collector | Output terminal; sinks current from load; placed on high-side of load in low-side switch topology. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring extended temperature and reliability compliance. |
| Pb-free packaging | Meets RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles and avoids hazardous substance restrictions in global production. |
| High hFE bin (C grade) | Guaranteed 420–800 hFE ensures consistent gain across production lots, reducing need for post-manufacture trimming in analog designs. |
| Low VCE(sat) | ≤ 0.6 V at full rated current enables efficient switching in battery-powered devices where voltage headroom is constrained. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Amplifying low-level signals from thermistors, photodiodes, or Hall-effect sensors in factory automation systems. IC Role / Device Role / Timing Role: NPN transconductance amplifier in common-emitter configuration with emitter degeneration for linearity. Use Value: High hFE and low noise figure (10 dB @ 1 kHz) preserve SNR in sub-mV signal conditioning paths. |
Use Scenario: Driving LED indicators, relays, and small solenoids in door lock, lighting, and HVAC subsystems. IC Role / Device Role / Timing Role: Low-side saturated switch controlled by microcontroller GPIO pins. Use Value: Guaranteed VCE(sat) ≤ 0.6 V and AEC-Q101 qualification ensure reliable actuation under wide temperature and supply variation. |
| Consumer Audio Signal Routing | IoT Edge Node Power Management |
Use Scenario: Selecting between audio input sources (e.g., mic vs. line-in) using transistor-based analog multiplexing. IC Role / Device Role / Timing Role: Linear-mode current-controlled switch with base resistor network defining ON/OFF thresholds. Use Value: fT = 100 MHz and low Cobo = 4.5 pF minimize crosstalk and distortion up to 20 kHz bandwidth. |
Use Scenario: Enabling/disabling peripheral rails (e.g., sensors, radios) in ultra-low-power wireless nodes during sleep/wake cycles. IC Role / Device Role / Timing Role: Load switch with fast turn-on/turn-off governed by base drive timing. Use Value: Low ICBO ≤ 15 nA at 25 °C and TJ range to +150 °C maintain leakage integrity over long sleep intervals. |
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 |
|---|---|---|---|
| BC847BTT1 | Lower hFE range (200–450), otherwise identical ratings and package. | Suitable where gain tolerance >200 is acceptable; less margin for aging or temperature drift in critical bias networks. | Select BC847BTT1 only if circuit gain stability analysis confirms adequate margin with lower hFE bin. |
| MMBT3904LT1G | Same SOT-23 package (not SC-75); hFE = 100–300; VCEO = 40 V; higher RJA (~700 °C/W). | Requires PCB footprint change; lower gain and voltage rating reduce design margin in precision or higher-voltage apps. | Use MMBT3904LT1G only when SOT-23 compatibility is mandatory and gain/voltage requirements are relaxed. |
Compared with BC847BTT1 and MMBT3904LT1G, the BC847CTT1 provides the highest guaranteed hFE and tightest binning among SC-75 NPN transistors in this family, making it optimal for gain-critical, space-constrained, and automotive-qualified designs where thermal efficiency and consistency are prioritized.
Availability
BC847CTT1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and IoT edge node power management requiring stable component supply and long-term manufacturability.
Supply support for BC847CTT1 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, cloud, and consumer markets.
The BC847CTT1 belongs to onsemi's BC847 series of general-purpose NPN transistors, designed for cost-sensitive, high-volume surface-mount applications demanding consistent gain, thermal robustness, and automotive-grade reliability.
FAQ
What is the maximum continuous collector current for BC847CTT1?
The BC847CTT1 has a maximum continuous collector current (IC) of 100 mA at TA = 25 °C. Derating is required above ambient temperature - power dissipation drops by 1.6 mW/°C on standard FR-4 with minimum pad, limiting usable current in elevated-temperature environments. Always verify thermal design margins using the 600 °C/W RJA value.
Is BC847CTT1 AEC-Q101 qualified?
Yes, BC847CTT1 is AEC-Q101 qualified and PPAP capable, as confirmed in the official onsemi datasheet (Rev. 4, November 2024). This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - validating suitability for automotive body electronics and non-safety-critical powertrain functions.
What does the 'C' in BC847CTT1 indicate?
The 'C' in BC847CTT1 denotes the hFE gain bin: guaranteed 420–800 at IC = 10 mA and VCE = 5 V. This distinguishes it from BC847ATT1 (110–220) and BC847BTT1 (200–450). The 'TT1' suffix indicates tape-and-reel packaging in SC-75/SOT-416 format.
Can BC847CTT1 replace BC847BTT1 in an existing design?
Yes, BC847CTT1 is a direct functional upgrade to BC847BTT1 - same package, pinout, voltage/current ratings, and thermal specs - with higher and tighter hFE. No layout or schematic changes are needed. However, verify that increased gain does not cause unintended saturation or instability in feedback-sensitive circuits like oscillators or high-gain amplifiers.
What is the thermal resistance (RJA) of BC847CTT1 on a standard PCB?
BC847CTT1 has RJA = 600 °C/W when mounted on FR-4 with minimum pad area, and 400 °C/W with 1.0 × 1.0 inch copper pad. These values assume natural convection; forced airflow or internal layer copper planes further reduce thermal resistance. Always use the 600 °C/W figure for worst-case thermal design unless enhanced copper layout is implemented.
BC847CTT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-75, SOT-416
- Packaging:
- Tape & Reel (TR)
- 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):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 225 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75, SOT-416
BC847CTT1 FAQ
1.How can I place an order for BC847CTT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847CTT1 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 BC847CTT1 reliable?
The price and inventory of BC847CTT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847CTT1 is usually 5 days.
3.What payment methods are accepted for BC847CTT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847CTT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847CTT1?
BC847CTT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847CTT1 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 BC847CTT1?
For technical support, including BC847CTT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847CTT1 requirements.
6.How does Aetrix verify that BC847CTT1 is sourced from the original manufacturer or authorized distributors?
All BC847CTT1 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 BC847CTT1 meets industry standards.
7.What is the process for return or replacement of BC847CTT1?
All BC847CTT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC847CTT1, 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 BC847CTT1 part is unused and in its original packaging.
Return procedure for BC847CTT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847CTT1 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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