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onsemi BC847BTT1
- Part No.:
- BC847BTT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
BC847BTT1.pdf
- Description:
- TRANS NPN 45V 0.1A SC75 SOT416
- Quantity:
- Payment:
- Shipping:
Inventory:2,386
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Product details
Overview
BC847BTT1 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 = 200–450 at IC = 2 mA, used in low-power switching and amplification circuits in automotive and industrial control modules.
For engineers reviewing the BC847BTT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, Pb-free SC-75 footprint, VCE(sat) ≤ 0.6 V at IC/IB = 10, fT = 100 MHz, and thermal resistance of 600 °C/W on FR-4 min-pad layout.
Technical Context
The BC847BTT1 operates as a discrete NPN bipolar junction transistor optimized for linear amplification and saturated switching in compact surface-mount designs. Its DC current gain spans 200–450 at 2 mA collector current, and it delivers fT = 100 MHz under standard bias conditions (IC = 10 mA, VCE = 5 V).
Thermal performance depends on PCB pad design: RJA is 600 °C/W with minimal copper (FR-4 min pad) and improves to 400 °C/W with 1.0 × 1.0 inch pad. It supports operation from −55 °C to +150 °C and meets AEC-Q101 stress testing requirements for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; defines upper rail limit in low-voltage switching stages. |
| IC (max) | 100 mA - Continuous collector current rating; sets load drive capability in signal-level logic interfaces and sensor buffers. |
| hFE | 200–450 - DC current gain range at IC = 2 mA; enables predictable base drive sizing for stable biasing in amplifier designs. |
| VCE(sat) | ≤ 0.6 V at IC/IB = 10 - Low saturation voltage minimizes power loss and heat generation in digital switch applications. |
| fT | 100 MHz - Current-gain bandwidth product; supports small-signal amplification up to mid-VHF frequencies. |
| RJA | 600 °C/W (min pad) - Junction-to-ambient thermal resistance; informs minimum PCB copper area needed for thermal compliance at full load. |
Pinout & Package
BC847BTT1 uses the SC-75/SOT-416 package (Case 463), a 3-pin, 1.60 × 0.80 × 0.80 mm surface-mount outline with 1.00 mm pitch. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector (Style 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Current-controlled input node; requires precise IB calculation (e.g., 0.5 mA for 10 mA IC) to ensure saturation or linear operation. |
| 2 | Emitter | Common reference terminal; connected to ground or emitter resistor for bias stability and thermal feedback in amplifier configurations. |
| 3 | Collector | Output current sink node; interfaces with load (e.g., LED, relay coil, logic gate input) and must remain within 45 V and 100 mA limits. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards. |
| Pb-free packaging | RoHS-compliant SC-75 construction with "G" suffix marking; eliminates lead-based solder compatibility concerns in modern assembly lines. |
| Low VCE(sat) | 0.25 V typical at IC = 10 mA / IB = 0.5 mA - reduces conduction loss by >40% vs. legacy general-purpose transistors. |
| High fT | 100 MHz - enables use in audio preamps, RF detector stages, and fast-switching PWM drivers without gain roll-off. |
Applications
| Automotive Door Module Control | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving window lift motor relays and LED status indicators in door control units. IC Role / Device Role / Timing Role: Discrete NPN switch providing isolated, low-loss current sinking for 12 V loads. Use Value: VCE(sat) ≤ 0.6 V ensures <15 mW dissipation at 25 mA, eliminating need for heatsinking in space-constrained modules. |
Use Scenario: Amplifying millivolt-level outputs from RTDs and thermocouples before ADC sampling. IC Role / Device Role / Timing Role: Linear-mode NPN amplifier configured in common-emitter topology with stable hFE = 200–450. Use Value: NF = 10 dB at 1 kHz enables accurate low-noise gain without introducing measurable signal distortion. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Interface |
|
Use Scenario: Enabling/disabling auxiliary power rails (e.g., display backlight, fan controller) during boot-up and shutdown. IC Role / Device Role / Timing Role: Saturated switch controlling 5–24 V, <100 mA loads via microcontroller GPIO. Use Value: Fast turn-on/off and low Cobo = 4.5 pF minimize switching transients and EMI in mixed-signal environments. |
Use Scenario: Isolating microcontroller I/O from high-voltage analog front-end circuitry in portable ultrasound devices. IC Role / Device Role / Timing Role: Level-shifting and current-buffering interface between 3.3 V logic and ±5 V analog subsystems. Use Value: TJ range of −55 °C to +150 °C supports reliable operation in battery-powered field-deployed equipment. |
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 | Same SC-70 package (SOT-323), identical electrical specs, but non-automotive grade and not AEC-Q101 qualified. | Lacks PPAP documentation and automotive stress test validation; unsuitable for Tier-1 automotive BOMs. | Select BC847BW only for cost-sensitive consumer or industrial prototypes where automotive qualification is unnecessary. |
| MMBT3904LT1G | Higher VCEO = 40 V (vs. 45 V), lower hFE min = 100, same SC-75 package and Pb-free construction. | Slightly reduced gain consistency and marginally lower voltage headroom; acceptable for non-critical switching. | Choose MMBT3904LT1G when existing designs already use it and minor parameter shifts are acceptable for requalification. |
Compared with BC847BTT1, BC847BW omits automotive qualification while retaining identical performance, whereas MMBT3904LT1G trades gain and voltage margin for broader distributor availability and legacy design continuity.
Availability
BC847BTT1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and medical diagnostic interface circuits requiring stable component supply and long-term lifecycle support.
Supply support for BC847BTT1 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BC847BTT1 belongs to onsemi's general-purpose bipolar transistor family designed specifically for high-reliability, low-power surface-mount switching and amplification in space-constrained, thermally demanding environments.
FAQ
What is the maximum operating temperature for BC847BTT1?
The BC847BTT1 has a specified junction and storage temperature range of −55 °C to +150 °C. This allows deployment in under-hood automotive modules and industrial enclosures exposed to wide ambient swings. Derating of power dissipation above 25 °C is required per its thermal characteristics table, with 1.6 mW/°C reduction on FR-4 min-pad layouts. The BC847BTT1 maintains parametric integrity across this full range when operated within its absolute maximum ratings.
Is BC847BTT1 pin-compatible with BC847C variants?
Yes, BC847BTT1 shares identical SC-75/SOT-416 package dimensions, pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), and mechanical footprint with BC847ATT1 and BC847CTT1. However, hFE ranges differ: BC847BTT1 is 200–450, BC847CTT1 is 420–800. Circuit redesign may be needed if gain-dependent biasing or noise performance is critical. The BC847BTT1 remains interchangeable in layouts where gain tolerance is ≥200.
Does BC847BTT1 require external biasing components in switching applications?
Yes, BC847BTT1 requires externally calculated base resistors to achieve target IB for desired IC and saturation. For example, driving 50 mA load at VCC = 5 V with VBE(sat) ≈ 0.7 V and hFE = 200 yields IB ≈ 0.25 mA, requiring ~17 kΩ pull-up from MCU GPIO. The BC847BTT1 does not integrate bias networks; proper resistor selection ensures reliable turn-on and avoids thermal runaway.
What does the "NSV" prefix in NSVBC847BTT1G* indicate?
The "NSV" prefix identifies a version of BC847BTT1 manufactured under onsemi's Automotive and Special Applications program, with dedicated process controls, enhanced traceability, and full AEC-Q101 qualification plus PPAP documentation. NSVBC847BTT1G* is functionally identical to BC847BTT1G but intended for automotive Tier-1 suppliers requiring site-specific change control and audit-ready compliance records. The BC847BTT1 itself is discontinued per onsemi's ordering table, making NSVBC847BTT1G* the recommended active variant.
How does BC847BTT1's thermal resistance compare between PCB pad configurations?
BC847BTT1's RJA is 600 °C/W on FR-4 with minimum pad size, improving to 400 °C/W with a 1.0 × 1.0 inch copper pad. This 33% reduction directly lowers junction temperature rise: at 100 mW dissipation, ΔTJ drops from 60 °C to 40 °C. Layouts using internal copper planes or thermal vias can further reduce RJA. The BC847BTT1's thermal response curve (Figure 5) confirms single-pulse capability supports short overloads, but sustained operation demands careful pad design per its datasheet notes.
BC847BTT1 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:
- 200 @ 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
BC847BTT1 FAQ
1.How can I place an order for BC847BTT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847BTT1 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 BC847BTT1 reliable?
The price and inventory of BC847BTT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847BTT1 is usually 5 days.
3.What payment methods are accepted for BC847BTT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847BTT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847BTT1?
BC847BTT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847BTT1 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 BC847BTT1?
For technical support, including BC847BTT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847BTT1 requirements.
6.How does Aetrix verify that BC847BTT1 is sourced from the original manufacturer or authorized distributors?
All BC847BTT1 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 BC847BTT1 meets industry standards.
7.What is the process for return or replacement of BC847BTT1?
All BC847BTT1 units undergo pre-shipment inspection (PSI). If there is an issue with BC847BTT1, 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 BC847BTT1 part is unused and in its original packaging.
Return procedure for BC847BTT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847BTT1 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
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
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