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Nexperia USA Inc. BC846BM,315
- Part No.:
- BC846BM,315
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- 3-XFDFN
- Datasheet:
-
BC846BM,315.pdf
- Description:
- TRANS NPN 65V 0.1A DFN1006B-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,437
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Product details
Overview
BC846BM from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in a leadless DFN1006-3 (SOT883) package, rated for 65 V VCEO, 100 mA IC, and DC current gain (hFE) of 200–450 at 2 mA/5 V. It delivers 250 mW power dissipation on FR4 PCB and supports automotive-grade switching and amplification in space-constrained mobile and infotainment modules.
For engineers reviewing the BC846BM datasheet, BC846BM pinout, BC846BM application, or BC846BM equivalent, this page provides verified package dimensions, thermal resistance (Rth(j-a) = 500 K/W), saturation voltage (VCEsat = 200–400 mV @ 100 mA), noise figure (2–10 dB), and AEC-Q101 qualification status - all critical for automotive signal conditioning and low-power logic interface design.
Technical Context
The BC846BM operates as a silicon NPN bipolar junction transistor optimized for linear amplification and digital switching in ambient temperatures from −55 °C to 150 °C. Its DFN1006-3 footprint enables high-density PCB layouts while maintaining thermal performance comparable to SOT23 through standardized FR4 mounting.
It features low base-emitter saturation voltage (900 mV max @ 100 mA/5 mA), tight hFE spread (200–450), and low collector capacitance (2 pF typical), supporting stable small-signal gain and fast switching in battery-powered sensor interfaces and LED driver bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum safe collector-emitter voltage with base open; defines breakdown margin in 12 V/24 V automotive supply rails. |
| IC | 100 mA continuous - Sustained collector current rating; suitable for driving small relays, LEDs, or logic-level translators. |
| hFE | 200–450 @ 2 mA/5 V - Confirmed DC current gain range; ensures predictable base drive sizing across production lots. |
| Ptot | 250 mW @ Tamb ≤ 25 °C - Power dissipation limit on standard FR4; requires derating above 25 °C per Fig. 1. |
| Rth(j-a) | 500 K/W - Junction-to-ambient thermal resistance; determines temperature rise under load without heatsinking. |
| VCEsat | 200–400 mV @ 100 mA/5 mA - Low saturation voltage reduces conduction loss in switching applications. |
| fT | 100 MHz - Transition frequency; supports RF pre-amplifier and high-speed digital buffer use up to ~10 MHz. |
Pinout & Package
DFN1006-3 (SOT883) is a leadless ultra-small surface-mount plastic package measuring 1.02 × 0.65 × 0.46 mm, with three solderable terminals on the bottom side and no leads. It requires reflow-compatible footprint per Fig. 8 and offers mechanical robustness for automotive vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Current-controlled input node; requires 0.5–5 mA base drive to saturate 100 mA collector current. |
| 2 | Emitter | Reference terminal for bias network; connected to ground or common return path in common-emitter configuration. |
| 3 | Collector | Output current path; handles up to 65 V and 100 mA; polarity-sensitive connection to load or supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock per discrete semiconductor stress test standard. |
| Leadless DFN1006-3 package | Reduces board area by >50% vs. SOT23 while maintaining comparable thermal and electrical performance. |
| Low VBEsat | 900 mV max @ 100 mA/5 mA - Enables efficient base drive from 1.8 V or 3.3 V microcontroller GPIOs. |
| Controlled hFE spread | 200–450 at 2 mA/5 V - Supports consistent gain matching in multi-transistor amplifier stages without binning. |
| Low noise figure | 2–10 dB @ 1 kHz - Suitable for audio pre-amplifiers and sensor signal conditioning where SNR matters. |
Applications
| Automotive Door Module | Smartphone Proximity Sensor |
|---|---|
Use Scenario: Switching window lift motor control signals and interior light drivers in door ECU units. IC Role / Device Role / Timing Role: NPN switch controlling 12 V loads via microcontroller GPIO; operates in saturated mode with <400 mV drop. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; compact DFN1006-3 saves PCB space in tight door cavity layouts. | Use Scenario: Amplifying analog output from IR proximity sensors before ADC sampling in smartphone front bezel. IC Role / Device Role / Timing Role: Small-signal NPN amplifier configured in common-emitter topology with 100 MHz fT and 2–10 dB noise figure. Use Value: Low VCEsat and tight hFE spread enable stable gain across battery voltage range (3.0–4.2 V); DFN1006-3 fits under narrow display cutouts. |
| Industrial PLC Input Stage | Wearable Health Monitor |
Use Scenario: Level-shifting and isolating 24 V field sensor inputs into 3.3 V microcontroller I/O pins. IC Role / Device Role / Timing Role: General-purpose NPN transistor used as active pull-down or optocoupler driver in isolated input circuitry. Use Value: 65 V VCEO withstands industrial transients; 150 °C Tj rating supports operation in uncooled control cabinets. | Use Scenario: Biasing photodiode amplifiers and driving low-current OLED segments in compact wearable displays. IC Role / Device Role / Timing Role: Low-power NPN amplifier and switch operating at 2 mA collector current with 200–450 hFE. Use Value: 250 mW Ptot and 500 K/W Rth(j-a) allow sustained operation within 1.5 mm² board area; marking code "ZB" enables traceability in high-mix assembly. |
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 |
|---|---|---|---|
| BC847BM | Higher hFE range (300–630), same package and voltage/current ratings. | Better suited for low-base-drive amplification; less ideal when precise gain control required. | Select BC847BM when higher DC gain is needed without changing layout or thermal design. |
| MMBT3904LT1G | SOT-23 package (larger), 40 V VCEO, 200 mA IC, non-AEC-Q101 qualified. | Acceptable for consumer-grade switching but not automotive due to lower voltage rating and qualification gap. | Choose MMBT3904LT1G only for cost-sensitive non-automotive designs where 40 V margin suffices and board space allows SOT-23. |
Compared with BC846BM, BC847BM offers higher gain for improved sensitivity in weak-signal amplification, while MMBT3904LT1G trades automotive reliability and voltage headroom for broader commercial availability and higher current capacity - making BC846BM the optimal choice for AEC-Q101-compliant, space-constrained 65 V switching.
Availability
BC846BM is available at Aetrix Electronics and suitable for automotive door modules, smartphone proximity sensor interfaces, and industrial PLC input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for BC846BM 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 components and advanced packaging.
The BC846BM belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for reliable switching and amplification in space-constrained automotive and portable electronics applications.
FAQ
Is BC846BM pin-compatible with BC847BM?
Yes - both share identical DFN1006-3 (SOT883) pinout (Base–Emitter–Collector on pins 1–2–3) and mechanical footprint. Electrical differences exist in hFE range (200–450 vs. 300–630) and VCEO (65 V for both), so direct substitution is electrically valid but may affect gain-dependent circuit behavior.
What is the maximum allowable junction temperature for BC846BM?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in Table 5 (Limiting values). Operation beyond this risks permanent degradation. Derating begins at 25 °C ambient, with Ptot decreasing linearly to zero at 150 °C per the 500 K/W thermal resistance curve in Figure 1.
Does BC846BM require special PCB layout considerations?
Yes - its DFN1006-3 package demands precise reflow footprint (Fig. 8), thermal relief on solder lands, and avoidance of copper pours under the die to prevent solder wicking. Use of FR4 with single-sided 1 oz copper and tin plating is validated; thermal vias are not recommended due to package construction.
Can BC846BM replace BC856BM in a circuit?
No - BC856BM is the PNP complement, with opposite polarity and inverted pinout (Emitter–Base–Collector). Swapping them would reverse bias conditions and cause functional failure. For PNP functionality, use BC856BM; for NPN, BC846BM is correct and not interchangeable with its PNP counterpart.
BC846BM,315 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 3-XFDFN
- 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:
- 200mV @ 500µA, 10mA
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1006B-3
BC846BM,315 FAQ
1.How can I place an order for BC846BM,315 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846BM,315 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 BC846BM,315 reliable?
The price and inventory of BC846BM,315 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846BM,315 is usually 5 days.
3.What payment methods are accepted for BC846BM,315?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846BM,315 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846BM,315?
BC846BM,315 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846BM,315 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 BC846BM,315?
For technical support, including BC846BM,315 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846BM,315 requirements.
6.How does Aetrix verify that BC846BM,315 is sourced from the original manufacturer or authorized distributors?
All BC846BM,315 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 BC846BM,315 meets industry standards.
7.What is the process for return or replacement of BC846BM,315?
All BC846BM,315 units undergo pre-shipment inspection (PSI). If there is an issue with BC846BM,315, 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 BC846BM,315 part is unused and in its original packaging.
Return procedure for BC846BM,315:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846BM,315 Tags
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MMBT3904-7-F
Diodes Incorporated
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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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MMBT2222A-TP
Micro Commercial Co
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