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Nexperia USA Inc. BC846B/DG/B3,235
- Part No.:
- BC846B/DG/B3,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC846B/DG/B3,235.pdf
- Description:
- TRANS NPN 65V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,753
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Product details
Overview
BC846B/DG/B3,235 from Nexperia is an NPN general-purpose transistor in SOT323 (SC-70) package, rated for 65 V VCEO, 100 mA IC, and hFE = 200–450 at VCE = 5 V, IC = 2 mA. It serves as a low-power switching and linear amplification device in space-constrained consumer and industrial signal-path circuits.
For engineers reviewing the BC846B/DG/B3,235 datasheet, BC846B/DG/B3,235 pinout, BC846B/DG/B3,235 application, or BC846B/DG/B3,235 equivalent, key selection criteria include DC current gain grouping (B-grade), thermal resistance (625 K/W), saturation voltage (VCE(sat) ≤ 400 mV @ IC = 100 mA), and SC-70 footprint compatibility with high-density PCB layouts.
Technical Context
This transistor operates in active, saturation, and cutoff regions with defined breakdown limits: VCEO = 65 V, VCBO = 80 V, and VEBO = 6 V. Its hFE is binned per gain group (B = 200–450), enabling predictable biasing in amplifier stages and reliable on/off control in digital logic interfaces.
Thermal performance is characterized by Rth(j-a) = 625 K/W on FR4 with standard single-sided copper, and transient thermal impedance data supports pulsed operation up to 200 mA peak collector current (tp ≤ 1 ms). Noise figure is specified at 2–10 dB (IC = 200 µA, f = 1 kHz), confirming suitability for low-noise preamplifier use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage before breakdown; sets upper rail limit in 5–48 V supply switching applications. |
| IC | 100 mA continuous - Supports load switching up to ~100 mW dissipation; suitable for driving LEDs, small relays, or logic-level translators. |
| hFE | 200–450 @ VCE = 5 V, IC = 2 mA - Tight B-grade binning enables stable DC bias design without gain-dependent recalibration. |
| VCE(sat) | ≤ 400 mV @ IC = 100 mA, IB = 5 mA - Ensures low conduction loss and minimal self-heating in saturated-switch mode. |
| Rth(j-a) | 625 K/W - Defines junction-to-ambient thermal rise under free-air conditions; requires thermal relief or copper pour above 50 mW steady-state power. |
| fT | 100 MHz - Enables use in audio-frequency amplifiers and low-speed digital signal conditioning up to ~10 MHz square-wave edges. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 1.35 mm × 1.8 mm footprint, 0.4 mm pitch, 3-terminal configuration optimized for automated placement and reflow soldering on high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive (typically 0.5–5 mA) to achieve full saturation at IC ≤ 100 mA. |
| 2 | Emitter (E) | Reference node for bias network; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output terminal; handles switched load current; layout must minimize trace inductance for fast turn-off in PWM applications. |
Key Features
| Feature | Design Value |
|---|---|
| Gain-binned selection (B-grade) | hFE = 200–450 ensures consistent DC operating point across production lots without trim resistors. |
| SOT323 (SC-70) package | 0.4 mm pin pitch and 1.35 mm × 1.8 mm body enable >2× component density vs. SOT23 in portable and wearable designs. |
| Low VCE(sat) | ≤ 400 mV at full rated current reduces power loss and thermal stress in battery-powered switching nodes. |
| 150 °C max junction temperature | Supports operation in sealed enclosures or ambient temperatures up to +85 °C with appropriate derating. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving discrete indicator or status LEDs from 3.3 V or 5 V MCU outputs. IC Role / Device Role / Timing Role: Low-side switch controlled by microcontroller GPIO pin. Use Value: VCE(sat) ≤ 400 mV ensures ≥95% LED forward voltage utilization; hFE ≥ 200 allows direct drive from 4 mA GPIO without external base resistor scaling. |
Use Scenario: Adding extra digital output capability to resource-constrained MCUs (e.g., STM32L0, nRF52). IC Role / Device Role / Timing Role: Digital buffer/level shifter between MCU and peripheral logic inputs. Use Value: Fast turn-on/turn-off (enabled by fT = 100 MHz) supports 1–5 MHz toggle rates; SOT323 footprint fits tight spacing around QFN-packaged MCUs. |
| Audio Pre-amplifier Stage | Power Supply Enable Switch |
|
Use Scenario: First-stage amplification of microphone or sensor signals in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed bias network. Use Value: NF = 2–10 dB at 1 kHz and low ICBO (≤5 µA at 150 °C) preserve SNR in battery-operated analog front-ends. |
Use Scenario: Enabling/disabling auxiliary power rails (e.g., 3.3 V LDO output) in multi-rail embedded systems. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlled by PMIC or supervisor IC. Use Value: VCEO = 65 V accommodates 24 V input rails with margin; 200 mA ICM peak rating supports inrush current limiting during hot-plug 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 |
|---|---|---|---|
| BC846BW,115 | Same SOT323 package and B-grade hFE (200–450), but marked with "1B" code and shipped in tape-and-reel per JEDEC standard. | Identical electrical behavior; differs only in packaging format (reel vs. bulk) and traceability coding. | Select when requiring automated pick-and-place compatibility and full lot traceability per IPC-A-610. |
| MMBT3904LT1G | Higher VCEO (40 V), lower hFE range (100–300), same SOT23 package (larger than SOT323); Rth(j-a) ≈ 400 K/W. | Less suitable for ultra-dense layouts; higher thermal resistance demands larger copper area for same power dissipation. | Choose only if legacy SOT23 footprint reuse is required and gain tolerance >100 is acceptable. |
Compared with BC846B/DG/B3,235, BC846BW,115 offers identical performance in automated assembly, while MMBT3904LT1G trades package size and thermal efficiency for broader industry familiarity-making the BC846B/DG/B3,235 optimal for new compact designs prioritizing gain consistency and board area.
Availability
BC846B/DG/B3,235 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and power supply enable switching requiring stable component supply and guaranteed gain binning.
Supply support for BC846B/DG/B3,235 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 leading Dutch semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with focus on automotive, industrial, and mobile applications.
The BC846xW series targets cost-sensitive, space-constrained general-purpose analog and digital interface functions-designed for robust performance in consumer electronics, IoT edge nodes, and industrial control modules.
FAQ
What is the exact hFE range for BC846B/DG/B3,235?
The BC846B/DG/B3,235 is binned to the B-grade specification: hFE = 200–450 measured at VCE = 5 V and IC = 2 mA per Nexperia's Product Data Sheet Rev. 12. This range is verified per unit during final test and marked with "1B%" code on the device body.
Can BC846B/DG/B3,235 replace BC846AW in existing designs?
No-BC846AW has hFE = 110–220, significantly lower than BC846B's 200–450 range. Substituting without circuit review may cause overdrive in amplifier stages or insufficient gain in low-base-current switches, risking thermal instability or incomplete saturation.
Is this transistor qualified for automotive applications?
No-BC846B/DG/B3,235 is not AEC-Q101 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or life-support systems. Automotive use requires verified AEC-Q101 parts such as BC846BQ.
What is the maximum allowable PCB copper area for thermal relief?
No minimum copper area is mandated, but Rth(j-a) = 625 K/W assumes standard FR4 with single-sided 35 µm copper and tin-plated pads per Figure 11. Doubling copper area (e.g., 2-layer thermal pad) typically improves Rth(j-a) by ~20–30%, supporting up to ~150 mW continuous dissipation at Tamb = 70 °C.
BC846B/DG/B3,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BC846x
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- TO-236AB
BC846B/DG/B3,235 FAQ
1.How can I place an order for BC846B/DG/B3,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846B/DG/B3,235 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 BC846B/DG/B3,235 reliable?
The price and inventory of BC846B/DG/B3,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846B/DG/B3,235 is usually 5 days.
3.What payment methods are accepted for BC846B/DG/B3,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846B/DG/B3,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846B/DG/B3,235?
BC846B/DG/B3,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846B/DG/B3,235 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 BC846B/DG/B3,235?
For technical support, including BC846B/DG/B3,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846B/DG/B3,235 requirements.
6.How does Aetrix verify that BC846B/DG/B3,235 is sourced from the original manufacturer or authorized distributors?
All BC846B/DG/B3,235 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 BC846B/DG/B3,235 meets industry standards.
7.What is the process for return or replacement of BC846B/DG/B3,235?
All BC846B/DG/B3,235 units undergo pre-shipment inspection (PSI). If there is an issue with BC846B/DG/B3,235, 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 BC846B/DG/B3,235 part is unused and in its original packaging.
Return procedure for BC846B/DG/B3,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846B/DG/B3,235 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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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
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MMBT2222ALT1G
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