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Nexperia USA Inc. BC847B,235
- Part No.:
- BC847B,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC847B,235.pdf
- Description:
- TRANS NPN 45V 0.1A TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:17,499
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Product details
Overview
BC847B,235 from Nexperia is an NPN general-purpose transistor in SOT23 (TO-236AB) package, rated for 45 V VCEO, 100 mA IC, and DC current gain (hFE) of 200–450 at VCE = 5 V and IC = 2 mA. It serves as a low-voltage switching or small-signal amplification device in compact consumer and industrial PCBs.
For engineers reviewing the BC847B,235 datasheet, BC847B,235 pinout, BC847B,235 application, or BC847B,235 equivalent, key selection criteria include its guaranteed hFE range, SOT23 thermal resistance (500 K/W), saturation voltage (≤400 mV at IC = 100 mA), and JEDEC-compliant marking code "1F%".
Technical Context
This discrete NPN bipolar junction transistor operates in active, saturation, and cutoff regions with defined absolute maximum ratings: VCEO = 45 V, VCBO = 50 V, VEBO = 6 V, and Ptot = 250 mW at Tamb ≤ 25 °C on FR4 PCB. Its hFE variation across temperature (−55 to +150 °C) and collector current (10 µA–100 mA) is characterized per Figures 6–9.
Thermal performance is specified with Rth(j-a) = 500 K/W under standard mounting conditions. Electrical behavior includes VBE(sat) ≤ 900 mV at IC = 100 mA / IB = 5 mA and fT ≥ 100 MHz at VCE = 5 V / IC = 10 mA - confirming suitability for audio-frequency amplification and digital logic interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - Maximum safe collector-emitter voltage before breakdown; defines rail compatibility up to 36 V systems. |
| IC | 100 mA continuous - Supports load switching for LEDs, relays, and small solenoids without external heat sinking. |
| hFE | 200–450 at VCE = 5 V, IC = 2 mA - Enables predictable base drive design for stable gain in amplifier stages. |
| VCE(sat) | ≤400 mV at IC = 100 mA, IB = 5 mA - Ensures low conduction loss in saturated-switch applications. |
| Ptot | 250 mW at Tamb ≤ 25 °C - Limits usable power in ambient-restricted environments unless derated per thermal curve. |
| fT | ≥100 MHz - Validates operation in audio and low-speed digital signal conditioning circuits. |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package: 3-pin, 1.3 mm × 2.9 mm footprint, 1.1 mm height, tin-plated leads, FR4-compatible reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires series resistor to limit IB and ensure saturation or linear operation. |
| 2 | Emitter (E) | Common reference terminal; tied to ground or low-side return path in most switch configurations. |
| 3 | Collector (C) | Output current sink; connects to load (e.g., LED anode or relay coil) when used in low-side switching. |
Key Features
| Feature | Design Value |
|---|---|
| Three hFE grades | BC847B offers 200–450 hFE, enabling precise gain binning for consistent circuit performance across production lots. |
| SOT23 footprint | Standardized 3-pin SMD package allows automated placement and compatibility with legacy BC847/BC547 board layouts. |
| 150 °C max junction temperature | Supports operation in thermally demanding industrial enclosures without forced cooling. |
| Low VBE(sat) | ≤900 mV ensures reliable turn-on with 3.3 V or 5 V microcontroller GPIOs without level-shifting. |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs in portable instrumentation. IC Role / Device Role / Timing Role: Low-side NPN switch controlled by MCU GPIO; operates in saturation region. Use Value: VCE(sat) ≤ 400 mV minimizes voltage drop, preserving LED forward voltage margin and brightness consistency. |
Use Scenario: Adding discrete output capability to resource-constrained MCUs lacking sufficient GPIO count. IC Role / Device Role / Timing Role: Digital buffer and current amplifier; translates weak MCU logic signals into 100 mA capable outputs. Use Value: Guaranteed hFE ≥ 200 enables robust base drive with 10 kΩ pull-up resistors, reducing BOM count. |
| Signal-Level Amplifier | Power Supply Enable Switch |
|
Use Scenario: Boosting microphone preamp output in battery-powered voice recorders. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier biased in active region for 20–20 kHz bandwidth. Use Value: fT ≥ 100 MHz supports flat gain response across full audio band with minimal phase distortion. |
Use Scenario: Enabling/disabling 12 V auxiliary rails in industrial control modules via 3.3 V logic. IC Role / Device Role / Timing Role: High-side or low-side enable switch controlling PMOS/NMOS gate drive or LDO EN pin. Use Value: VCEO = 45 V provides 3× safety margin over 12 V rail, preventing latch-up during transients. |
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,115 | SOT323 (SC-70) package; identical electrical specs but 30 % smaller footprint and higher Rth(j-a) (625 K/W). | Preferred where board space is critical and power dissipation remains < 150 mW. | Select when layout density outweighs thermal margin; verify solder paste volume for SC-70 reflow. |
| MMBT3904LT1G | hFE = 100–300 (lower max); VCEO = 40 V; same SOT23 package and pinout. | Acceptable for cost-sensitive designs where 45 V margin is not required and gain tolerance > 300 is unnecessary. | Choose for legacy compatibility with existing MMBT3904-based designs; validate VCEO margin in 36 V systems. |
Compared with BC847B,235, BC847BW,115 trades thermal performance for miniaturization, while MMBT3904LT1G reduces voltage and gain headroom but improves supply-chain availability in high-volume consumer lines.
Availability
BC847B,235 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, signal-level amplification, and power supply enable switching requiring stable component supply and SOT23 footprint consistency.
Supply support for BC847B,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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for mass-market electronics.
The BC847x series targets cost-sensitive, high-volume applications requiring proven reliability and standardized SMD packaging - designed specifically for general-purpose switching and amplification in consumer, industrial, and computing equipment.
FAQ
Is BC847B,235 automotive-qualified?
No. Per Nexperia's revision history (Rev. 13, July 2022), the BC847x series is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and is not warranted for use in safety-critical vehicle systems. Automotive alternatives must be selected from Nexperia's dedicated -Q product line.
What is the marking code for BC847B,235?
The top-side marking is "1F%", where "1F" identifies the BC847B type and "%" is a placeholder for the manufacturing site code. This matches Table 5 in the official datasheet and is visible under 20× magnification on the SOT23 package.
Can BC847B,235 replace BC847C in a circuit?
Only if the design does not require hFE ≥ 420. BC847B has hFE = 200–450 versus BC847C's 420–800. In high-gain amplifier stages or low-base-drive applications, substitution may cause insufficient current amplification or bias shift - verify operating point with worst-case hFE min.
What is the maximum allowable continuous collector current at 85 °C ambient?
At Tamb = 85 °C, derating applies: Ptot drops linearly from 250 mW at 25 °C to 0 mW at 150 °C. At 85 °C, Ptot ≈ 150 mW. With VCE(sat) ≈ 300 mV, max IC ≈ 150 mW / 0.3 V = 500 mA - but absolute maximum IC remains 100 mA per Table 6, so 100 mA is the hard limit regardless of temperature.
BC847B,235 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- 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):
- 45 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
BC847B,235 FAQ
1.How can I place an order for BC847B,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC847B,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 BC847B,235 reliable?
The price and inventory of BC847B,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC847B,235 is usually 5 days.
3.What payment methods are accepted for BC847B,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC847B,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC847B,235?
BC847B,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC847B,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 BC847B,235?
For technical support, including BC847B,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC847B,235 requirements.
6.How does Aetrix verify that BC847B,235 is sourced from the original manufacturer or authorized distributors?
All BC847B,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 BC847B,235 meets industry standards.
7.What is the process for return or replacement of BC847B,235?
All BC847B,235 units undergo pre-shipment inspection (PSI). If there is an issue with BC847B,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 BC847B,235 part is unused and in its original packaging.
Return procedure for BC847B,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC847B,235 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
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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
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