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Nexperia USA Inc. BC846B,235
- Part No.:
- BC846B,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC846B,235.pdf
- Description:
- TRANS NPN 65V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:490,369
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Product details
Overview
BC846B,235 from Nexperia is an NPN general-purpose transistor in SOT23 (TO-236AB) 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-voltage switching and small-signal amplification device in consumer power management, LED driver biasing, and microcontroller I/O interface circuits.
For engineers reviewing the BC846B,235 datasheet, BC846B,235 pinout, BC846B,235 application, or BC846B,235 equivalent, this page delivers verified pin mapping, gain-bandwidth trade-offs, thermal derating guidance, and validated alternatives for discrete BJT selection in space-constrained SMD designs.
Technical Context
The BC846B,235 operates as a silicon planar epitaxial NPN transistor with base-emitter junction optimized for stable DC current gain across –55 °C to +150 °C ambient range. Its hFE binning (Group B) ensures predictable switching thresholds and saturation behavior under 2 mA to 100 mA collector loads.
Thermal resistance Rth(j-a) is 500 K/W on standard FR4 PCB (single-sided, 35 µm Cu), defining maximum continuous power dissipation at 250 mW (Tamb ≤ 25 °C). VCE(sat) remains ≤ 400 mV at IC = 100 mA / IB = 5 mA, supporting efficient low-side switch operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage before breakdown; enables use in 24 V and 48 V rail interfaces. |
| IC | 100 mA - Continuous DC collector current rating; supports signal-level switching and low-power amplification. |
| hFE | 200–450 @ VCE=5 V, IC=2 mA - High and tightly binned DC current gain for reliable base drive sizing in linear and saturated modes. |
| VCE(sat) | ≤ 400 mV @ IC=100 mA, IB=5 mA - Low saturation voltage minimizes conduction loss in switching applications. |
| fT | 100 MHz - Transition frequency suitable for audio-frequency amplification and digital signal buffering up to ~10 MHz. |
| Rth(j-a) | 500 K/W - Junction-to-ambient thermal resistance on standard FR4; dictates PCB copper area requirements for thermal management. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mount package: 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height, tin-plated leads, JEDEC-compliant outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive (typically 1–5 mA) to achieve full saturation at IC ≤ 100 mA. |
| 2 | Emitter (E) | Reference node for biasing; connected to ground or low-side return path in common-emitter configurations. |
| 3 | Collector (C) | Output terminal; handles switched load current up to 100 mA; must be routed with adequate trace width for thermal and current handling. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE binning (Group B) | Guarantees 200–450 gain at 2 mA, reducing base drive circuit complexity and enabling single-resistor bias networks. |
| Low VCE(sat) | ≤ 400 mV at full rated current ensures <100 mW conduction loss, critical for battery-powered and thermally constrained designs. |
| SOT23 package compatibility | Standardized footprint allows drop-in replacement with BC847/BC848 series and automated placement on high-density PCBs. |
| 150 °C max junction temperature | Supports operation in industrial environments without forced cooling when derated per Rth(j-a) and ambient conditions. |
Applications
| LED Driver Biasing | Microcontroller I/O Interface |
|---|---|
Use Scenario: Driving indicator LEDs from 3.3 V or 5 V MCU GPIO pins with current limiting. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground. Use Value: Guaranteed hFE ≥ 200 ensures full saturation with ≤ 500 µA base current, preserving GPIO drive strength and minimizing firmware overhead. |
Use Scenario: Level-shifting or signal inversion between mixed-voltage logic domains (e.g., 3.3 V MCU to 5 V peripheral). IC Role / Device Role / Timing Role: Discrete inverter or open-collector buffer with pull-up resistor on collector. Use Value: fT = 100 MHz and fast VBE/VCE(sat) response support clean edge transitions up to 10 MHz without added propagation delay. |
| Low-Voltage Power Switching | Audio Signal Amplification |
Use Scenario: Enabling/disabling 12 V auxiliary rails (e.g., sensor bias, display backlight) using MCU-controlled low-side switch. IC Role / Device Role / Timing Role: Saturated NPN switch with base resistor network controlling turn-on/turn-off timing. Use Value: VCEO = 65 V provides 5× safety margin over 12 V rail, while Rth(j-a) = 500 K/W permits operation at 70 °C ambient with no heatsink. |
Use Scenario: Pre-amplifying microphone or line-level analog signals in portable audio devices. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with emitter degeneration resistor for gain stability. Use Value: NF = 2–10 dB at 1 kHz and low Cc = 2–3 pF minimize noise contribution and preserve high-frequency fidelity in 20 Hz–20 kHz band. |
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 |
|---|---|---|---|
| BC847B,235 | Same SOT23 package; hFE = 200–450 but specified at IC = 10 mA (not 2 mA); VCE(sat) slightly higher (≤ 600 mV @ 100 mA). | Better suited for medium-current switching (>10 mA), less optimal for ultra-low-base-drive scenarios. | Select when operating near IC = 10–100 mA and tighter VCE(sat) tolerance is not required. |
| MMBT3904LT1G | Same package; hFE = 100–300 @ IC = 10 mA; lower VCEO = 40 V; higher Cc = 4 pF. | Limited to ≤ 24 V systems; reduced high-frequency performance due to higher capacitance. | Choose only for cost-sensitive, non-critical 3.3/5 V logic interfacing where gain consistency at low IC is secondary. |
Compared with BC846B,235, BC847B,235 offers identical gain binning but relaxed test conditions, while MMBT3904LT1G trades voltage headroom and RF performance for broader distributor availability-making BC846B,235 optimal for precision low-IC biasing and 48 V-compatible designs.
Availability
BC846B,235 is available at Aetrix Electronics and suitable for LED driver biasing, microcontroller I/O interface, and low-voltage power switching requiring stable component supply and consistent hFE binning across production lots.
Supply support for BC846B,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 global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BC846x series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, space-efficient switching and amplification in consumer, industrial, and communication equipment.
FAQ
What is the maximum continuous collector current for BC846B,235?
The absolute maximum continuous collector current (IC) is 100 mA at Tamb ≤ 25 °C. Derating is required above 25 °C per the thermal resistance Rth(j-a) = 500 K/W; at 70 °C ambient, maximum usable IC drops to approximately 55 mA to maintain Tj ≤ 150 °C.
Is BC846B,235 suitable for automotive applications?
No. Per Nexperia's revision history (Rev. 12, July 2022), the BC846x series is explicitly designated as non-automotive qualified. It lacks AEC-Q101 qualification, automotive-grade testing, and extended temperature validation. For automotive use, Nexperia recommends its -Q qualified variants such as BC846B-Q.
How does the hFE of BC846B,235 vary with temperature?
hFE increases with junction temperature: typical gain rises ~0.5%/°C between 25 °C and 125 °C. Figure 2 shows hFE ≈ 350 at IC = 2 mA and Tj = 150 °C versus ≈ 290 at 25 °C-critical for thermal stability analysis in bias networks.
Can BC846B,235 replace BC546B in existing designs?
Yes, with verification. Both share identical electrical specs (VCEO, IC, hFE range) and TO-92 package pinout, but BC846B,235 uses SOT23-requiring PCB footprint redesign. Electrical behavior is equivalent, but thermal performance differs: SOT23 has higher Rth(j-a) (500 K/W) than TO-92 (~200 K/W), necessitating layout review for power dissipation.
BC846B,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:
- Active
- 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,235 FAQ
1.How can I place an order for BC846B,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846B,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,235 reliable?
The price and inventory of BC846B,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,235 is usually 5 days.
3.What payment methods are accepted for BC846B,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846B,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846B,235?
BC846B,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846B,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,235?
For technical support, including BC846B,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846B,235 requirements.
6.How does Aetrix verify that BC846B,235 is sourced from the original manufacturer or authorized distributors?
All BC846B,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,235 meets industry standards.
7.What is the process for return or replacement of BC846B,235?
All BC846B,235 units undergo pre-shipment inspection (PSI). If there is an issue with BC846B,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,235 part is unused and in its original packaging.
Return procedure for BC846B,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846B,235 Tags
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MMBT3906LT1G
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
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MMBT3904-TP
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MMBT2222A-7-F
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BC847B,215
Nexperia USA Inc.
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