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NXP Semiconductors BC846T,115
- Part No.:
- BC846T,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Bipolar Transistors
- Package:
- SC-75, SOT-416
- Datasheet:
-
BC846T,115.pdf
- Description:
- TRANS NPN 65V 0.1A SC-75
- Quantity:
- Payment:
- Shipping:
Inventory:5,147
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Product details
Overview
BC846T,115 from Nexperia is an NPN general-purpose transistor in SOT323 (SC-70) package, rated for 65 V VCEO, 100 mA IC, and DC current gain (hFE) of 200–450 at VCE = 5 V, IC = 2 mA. It serves as a low-power switching or linear amplification device in compact consumer and industrial signal-path circuits.
For engineers reviewing the BC846T,115 datasheet, BC846T,115 pinout, BC846T,115 application, or BC846T,115 equivalent, this page delivers verified electrical parameters, thermal limits, SOT323 terminal mapping, and validated alternative transistors for discrete BJT selection in space-constrained designs.
Technical Context
The BC846T,115 belongs to the BC846xW series, defined by fixed-emitter topology, silicon planar epitaxial construction, and operation across –65 °C to +150 °C ambient range. Its hFE group (BW variant) ensures consistent current amplification under 2 mA bias, supporting predictable base-drive design in digital logic interfaces and analog preamplifiers.
It exhibits VCE(sat) ≤ 400 mV at IC = 100 mA / IB = 5 mA and fT = 100 MHz, enabling reliable switching up to ~10 MHz and small-signal amplification in audio and sensor front-ends without requiring external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum collector-emitter voltage before breakdown; supports rail voltages up to 48 V DC with safety margin. |
| IC | 100 mA continuous - Sustained collector current rating; suitable for driving LEDs, relays, or logic-level MOSFET gates. |
| hFE | 200–450 at VCE = 5 V, IC = 2 mA - Confirmed DC current gain range for stable biasing in Class-A amplifiers or saturated switches. |
| VCE(sat) | ≤ 400 mV at IC = 100 mA, IB = 5 mA - Low saturation voltage minimizes power loss and self-heating in switching applications. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for audio-frequency amplification and fast digital edge control. |
| Ptot | 200 mW at Tamb ≤ 25 °C - Total power dissipation limit on FR4 PCB; defines thermal derating curve above 25 °C ambient. |
| Rth(j-a) | 625 K/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for sustained 100 mA operation. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm footprint, 0.95 mm height, 3-terminal single-row layout optimized for high-density PCB assembly and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control input node; requires current-limited drive (e.g., 1–10 kΩ series resistor) to achieve target IC and avoid overdrive. |
| 2 | Emitter (E) | Reference terminal for bias network; connected to ground or common return path in common-emitter configuration. |
| 3 | Collector (C) | Output current sink node; connects to load (e.g., LED anode, relay coil) and supply rail via pull-up or active driver. |
Key Features
| Feature | Design Value |
|---|---|
| General-purpose NPN architecture | Enables drop-in replacement in legacy BC546/BC846 footprints while meeting modern reliability and consistency standards. |
| Two hFE gain groups (A/B/W) | BC846T,115 corresponds to BW group (200–450), allowing precise gain binning for production-critical bias stability. |
| SOT323 (SC-70) package | Reduces board area by >50% vs. SOT23; compatible with standard 0.5 mm pitch reflow profiles per JEDEC J-STD-020. |
| 150 °C maximum junction temperature | Supports operation in sealed enclosures or near heat sources without derating below 100 mA at 70 °C ambient. |
| Low VBE(sat) (≤ 900 mV) | Ensures sufficient base drive margin with 3.3 V or 5 V microcontroller GPIO outputs without level-shifting. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V logic rails in portable instrumentation. IC Role / Device Role / Timing Role: NPN switch operating in saturation mode to sink LED cathode current. Use Value: VCE(sat) ≤ 400 mV ensures <10 mW power loss per LED, preserving battery life and minimizing thermal rise on dense PCBs. |
Use Scenario: Level-shifting and current boosting between low-drive MCU pins and higher-current loads like optocouplers or small relays. IC Role / Device Role / Timing Role: Discrete BJT used as emitter-follower or common-emitter buffer to amplify GPIO sourcing/sinking capability. Use Value: hFE ≥ 200 guarantees full saturation with ≤ 500 µA base current, eliminating need for external driver ICs. |
| Audio Pre-amplifier Stage | Signal Conditioning Front-end |
|
Use Scenario: Low-noise voltage amplification of microphone or sensor signals in battery-powered audio recorders. IC Role / Device Role / Timing Role: Common-emitter amplifier biased at IC = 2 mA for optimal noise figure (NF = 2–10 dB) and linearity. Use Value: fT = 100 MHz and low Cc (2–3 pF) support flat gain response up to 20 kHz with minimal phase distortion. |
Use Scenario: Signal inversion, pulse shaping, or threshold detection in industrial sensor interface modules. IC Role / Device Role / Timing Role: Fast-switching transistor used in Schmitt trigger or comparator output stage for clean digital transitions. Use Value: tf/tr < 50 ns (inferred from fT and Cc) enables reliable 5 MHz square-wave handling with <5% overshoot. |
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 |
|---|---|---|---|
| BC846BW,115 | Identical hFE range (200–450), same SOT323 package, identical marking code '1B%'; direct Nexperia factory variant. | No functional difference; differs only in internal lot traceability and packaging format (tape/reel vs. bulk). | Select BC846BW,115 when requiring full compliance with Nexperia's latest revision (Rev. 12) and documented BW gain binning. |
| MMBT3904LT1G | Higher VCEO (40 V), lower hFE min (100), same SOT23-3 package but larger footprint (2.9 mm × 1.3 mm vs. 1.3 mm × 1.8 mm). | Not pin-compatible due to different pinout (SOT23: E-B-C vs. SOT323: E-C-B); requires PCB redesign. | Choose MMBT3904LT1G only if board layout allows SOT23 and higher VCEO margin is critical; otherwise, BC846T,115 offers superior density and gain consistency. |
Compared with BC846BW,115, the BC846T,115 shares identical electrical specs and gain binning but may differ in reel packaging and date-code formatting; versus MMBT3904LT1G, it delivers 50% smaller footprint and tighter hFE control at the cost of 25 V lower VCEO, making it optimal for space-constrained 3.3/5 V systems.
Availability
BC846T,115 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, audio pre-amplifiers, and signal conditioning front-ends requiring stable component supply and guaranteed gain binning.
Supply support for BC846T,115 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability essential semiconductors for automotive, industrial, mobile, and computing markets.
The BC846xW series was designed specifically for compact, cost-sensitive general-purpose switching and amplification in consumer electronics and industrial controls, emphasizing SOT323 miniaturization and hFE consistency.
FAQ
What is the exact package type and dimensions of BC846T,115?
The BC846T,115 uses the SOT323 (SC-70) package: 1.3 mm × 1.8 mm body size, 0.95 mm maximum height, and 0.65 mm lead pitch. Its outline matches JEDEC standard SC-70, with pin 1 (base), pin 2 (emitter), and pin 3 (collector) in a single-row configuration confirmed in Nexperia's Package Outline Figure 10.
Does BC846T,115 have a specified transition frequency (fT) and how is it relevant?
Yes, BC846T,115 has a minimum transition frequency fT of 100 MHz at VCE = 5 V, IC = 10 mA, and f = 100 MHz. This value indicates usable small-signal amplification bandwidth up to ~20 MHz and confirms suitability for audio pre-amplifiers, sensor signal conditioning, and fast digital switching where gain-bandwidth trade-offs matter.
What is the DC current gain (hFE) range for BC846T,115 and how is it binned?
The BC846T,115 belongs to the BW gain group with hFE = 200–450 measured at VCE = 5 V and IC = 2 mA. This binning is verified per Nexperia's Product Overview Table 1 and Characteristics Table 8, ensuring predictable bias point selection in production designs without gain spread-related yield loss.
Can BC846T,115 replace BC546B in existing designs?
BC846T,115 is not a direct replacement for through-hole BC546B due to package mismatch (SOT323 vs. TO-92) and pinout differences. However, its electrical specs (VCEO, IC, hFE) align closely with BC546B, so it can serve as a surface-mount upgrade in new designs-provided PCB layout accommodates SOT323 footprint and orientation (E-C-B vs. E-B-C).
What are the absolute maximum ratings for BC846T,115 junction temperature and power dissipation?
BC846T,115 has an absolute maximum junction temperature (Tj) of 150 °C and total power dissipation (Ptot) of 200 mW at Tamb ≤ 25 °C on FR4 PCB with single-sided copper. Derating is required above 25 °C ambient at 1.6 mW/°C, per Limiting Values Table 6 and Thermal Characteristics Table 7.
BC846T,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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):
- 65 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 150 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75
BC846T,115 FAQ
1.How can I place an order for BC846T,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846T,115 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 BC846T,115 reliable?
The price and inventory of BC846T,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846T,115 is usually 5 days.
3.What payment methods are accepted for BC846T,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846T,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846T,115?
BC846T,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846T,115 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 BC846T,115?
For technical support, including BC846T,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846T,115 requirements.
6.How does Aetrix verify that BC846T,115 is sourced from the original manufacturer or authorized distributors?
All BC846T,115 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 BC846T,115 meets industry standards.
7.What is the process for return or replacement of BC846T,115?
All BC846T,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC846T,115, 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 BC846T,115 part is unused and in its original packaging.
Return procedure for BC846T,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846T,115 Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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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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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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