My Inquiry
My Account
Nexperia USA Inc. BC846BW/DG/B3F
- Part No.:
- BC846BW/DG/B3F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC846BW/DG/B3F.pdf
- Description:
- TRANS NPN 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:8,254
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BC846BW/DG/B3F 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 compact, surface-mount switching or amplification device in space-constrained consumer and industrial signal-path circuits.
For engineers reviewing the BC846BW/DG/B3F datasheet, BC846BW/DG/B3F pinout, BC846BW/DG/B3F application, or BC846BW/DG/B3F equivalent, this page delivers verified electrical parameters, thermal behavior, SOT323 footprint details, and validated alternative transistors for discrete BJT selection in low-power analog and digital interface stages.
Technical Context
This transistor operates as a silicon NPN bipolar junction device with open-base collector-emitter breakdown voltage of 65 V and emitter-base breakdown voltage of 6 V. Its hFE grouping (B-grade) ensures consistent current amplification across production lots under standard bias conditions (VCE = 5 V, IC = 2 mA).
Thermal resistance Rth(j-a) is 625 K/W on FR4 PCB with single-sided 35 µm copper, defining its power handling limit at 200 mW under ambient conditions. Saturation performance is characterized at IC/IB = 20, with VCE(sat) ≤ 400 mV at IC = 100 mA and IB = 5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage before breakdown in open-base configuration. |
| IC | 100 mA - Continuous DC collector current rating; defines maximum linear or switching load current. |
| hFE | 200–450 - DC current gain range at VCE = 5 V, IC = 2 mA; enables predictable base drive sizing. |
| VCE(sat) | ≤ 400 mV - Collector-emitter saturation voltage at IC = 100 mA, IB = 5 mA; determines on-state power loss in switching. |
| Ptot | 200 mW - Total power dissipation limit at Tamb ≤ 25 °C on standard FR4 PCB; constrains thermal design margin. |
| fT | 100 MHz - Transition frequency at VCE = 5 V, IC = 10 mA; supports small-signal amplification up to HF band. |
| Cc | 2–3 pF - Collector capacitance at VCB = 10 V; impacts high-frequency response and Miller effect in amplifier stages. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm × 0.95 mm body, 0.65 mm lead pitch, tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive to bias transistor into active or saturation region. |
| 2 | Emitter (E) | Current return path; typically grounded or connected to low-impedance reference in common-emitter configurations. |
| 3 | Collector (C) | Output terminal; connects to load or next stage; handles full collector current and voltage swing. |
Key Features
| Feature | Design Value |
|---|---|
| Two hFE gain selections | BC846BW offers 200–450 hFE, enabling precise base resistor selection for stable switching thresholds or gain-critical amplifiers. |
| SOT323 ultra-small footprint | 1.3 × 1.8 mm outline reduces PCB area by >50% vs. SOT23; ideal for wearables, sensor nodes, and dense control boards. |
| 150 °C max junction temperature | Supports operation in thermally demanding environments (e.g., enclosed industrial enclosures) without derating below 100 mA. |
| Low VBE(sat) | ≤ 900 mV at IC = 100 mA, IB = 5 mA - minimizes base drive power and improves efficiency in high-duty-cycle switches. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V microcontroller outputs with current limiting. IC Role / Device Role / Timing Role: Discrete NPN switch replacing integrated driver ICs to reduce cost and board space. Use Value: VCE(sat) ≤ 200 mV at IC = 20 mA ensures >95% LED forward voltage utilization and minimal self-heating. |
Use Scenario: Level-shifting and current boosting for 5 V peripherals controlled by 3.3 V MCU pins. IC Role / Device Role / Timing Role: Active-low logic buffer with gain-controlled base drive to ensure clean 5 V output transitions. Use Value: hFE ≥ 200 guarantees reliable saturation with ≤ 100 µA base current, preserving MCU pin drive capability. |
| Audio Signal Amplifier Stage | Power Supply Enable Switch |
|
Use Scenario: Low-noise preamplifier for electret microphone signals in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased in linear region for 20 Hz–20 kHz bandwidth. Use Value: NF = 2–10 dB at IC = 200 µA enables SNR > 60 dB in battery-powered recording systems. |
Use Scenario: Enabling/disabling 5 V rail to peripheral modules (e.g., sensors, radios) via MCU control. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling power domain sequencing. Use Value: 65 V VCEO provides 2× safety margin over 5 V rail, preventing latch-up during transient overvoltage events. |
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 SOT323 package; hFE = 200–450 but VCEO = 45 V (vs. 65 V) | Not suitable where 65 V breakdown margin is required (e.g., 24 V industrial bus interfaces) | Select BC846BW when system voltage transients exceed 45 V or long-term reliability at elevated VCE is critical. |
| MMBT3904LT1G | Same 60 V VCEO, 200 mA IC; hFE = 100–300 at IC = 10 mA (wider spread, lower min) | Higher IC rating allows higher load currents but less gain consistency at low bias points | Choose MMBT3904LT1G only if peak current > 100 mA is needed and hFE variation < 100 is acceptable. |
Compared with BC846BW/DG/B3F, BC847BW trades 20 V breakdown headroom for identical gain and footprint, while MMBT3904LT1G increases current capacity at the expense of guaranteed low-current hFE stability-making BC846BW optimal for precision 2 mA–10 mA biasing in compact 65 V-tolerant designs.
Availability
BC846BW/DG/B3F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio signal amplification, and power supply enable switching requiring stable component supply and SOT323 footprint compatibility.
Supply support for BC846BW/DG/B3F 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 specializing in high-volume, high-reliability discrete and logic devices, with manufacturing rooted in process control and automotive-grade quality systems.
The BC846xW series belongs to Nexperia's general-purpose transistor product line, engineered for cost-sensitive, space-constrained applications requiring robust parametric consistency and JEDEC-standard SMD packaging.
FAQ
What is the marking code for BC846BW/DG/B3F?
The top-side marking is "1B%" where "%" is a placeholder for the manufacturing site code (e.g., "1BA", "1BB"). This matches Table 5 in the official Nexperia datasheet Rev. 12 and distinguishes it from BC846W ("1D%") and BC846AW ("1A%"). No other alphanumeric variants are valid for this part number.
Can BC846BW/DG/B3F replace BC846B in through-hole designs?
No-it is exclusively a surface-mount device in SOT323 (SC-70) package and lacks leads for through-hole mounting. The through-hole equivalent is BC846B in TO-92, which has different thermal, mechanical, and electrical characteristics (e.g., higher Rth(j-a), lower fT). Direct substitution requires PCB redesign and validation of gain, saturation, and thermal behavior.
What is the maximum allowable pulsed collector current?
The peak collector current is 200 mA for single pulses with duration ≤ 1 ms and duty cycle ≤ 0.02, as specified in Table 6 (Limiting Values). Exceeding this violates the Absolute Maximum Rating System (IEC 60134) and risks permanent junction damage, even if average power remains within 200 mW.
Is BC846BW/DG/B3F suitable for automotive applications?
No-this part is not automotive-qualified. The datasheet explicitly states in Section 14 that non-automotive qualified products are "neither qualified nor tested in accordance with automotive testing or application requirements." Use only AEC-Q101 qualified alternatives (e.g., BC846BQ) for automotive ECUs or ADAS subsystems.
BC846BW/DG/B3F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC846xW
- Package/Case:
- SC-70, SOT-323
- 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:
- 200 @ 2mA, 5V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC846BW/DG/B3F FAQ
1.How can I place an order for BC846BW/DG/B3F through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BW/DG/B3F 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 BC846BW/DG/B3F reliable?
The price and inventory of BC846BW/DG/B3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BW/DG/B3F is usually 5 days.
3.What payment methods are accepted for BC846BW/DG/B3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BW/DG/B3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BW/DG/B3F?
BC846BW/DG/B3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BW/DG/B3F 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 BC846BW/DG/B3F?
For technical support, including BC846BW/DG/B3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BW/DG/B3F requirements.
6.How does Aetrix verify that BC846BW/DG/B3F is sourced from the original manufacturer or authorized distributors?
All BC846BW/DG/B3F 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 BC846BW/DG/B3F meets industry standards.
7.What is the process for return or replacement of BC846BW/DG/B3F?
All BC846BW/DG/B3F units undergo pre-shipment inspection (PSI). If there is an issue with BC846BW/DG/B3F, 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 BC846BW/DG/B3F part is unused and in its original packaging.
Return procedure for BC846BW/DG/B3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BW/DG/B3F Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
