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Nexperia USA Inc. BC846S,125
- Part No.:
- BC846S,125
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC846S,125.pdf
- Description:
- TRANS 2NPN 65V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:49,520
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Product details
Overview
BC846S from Nexperia is a dual NPN general-purpose transistor in a SOT363-3 (TSSOP6) package, delivering two independent transistors with VCEO = 65 V, IC = 100 mA per device, and hFE = 110 at 2 mA/5 V - used for compact signal amplification and discrete switching in space-constrained PCBs.
For engineers reviewing the BC846S datasheet, BC846S pinout, BC846S application, or BC846S equivalent, this page provides verified pin mapping, thermal derating curves, DC gain vs. temperature behavior, saturation voltage under pulsed conditions, and validated alternatives for dual-transistor board-level optimization.
Technical Context
The BC846S integrates two electrically isolated NPN transistors sharing no internal coupling - enabling independent biasing and operation without crosstalk. Each transistor supports VCEO up to 65 V and continuous collector current of 100 mA at Tamb ≤ 25 °C.
Thermal performance is defined per device (300 mW total power dissipation on FR4) and per transistor (220 mW), with Rth(j-a) = 416 K/W per transistor and 568 K/W per device in free air - critical for thermal layout planning in high-density analog or logic interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - maximum safe collector-emitter voltage with base open; defines upper rail limit for switching or amplifier stages. |
| IC | 100 mA - continuous DC collector current per transistor; sets load-driving capability in small-signal applications. |
| hFE | 110 (min) at 2 mA/5 V - ensures predictable current amplification in linear or active-region biasing schemes. |
| VCE(sat) | 300 mV max at IC = 100 mA, IB = 5 mA - low saturation voltage enables efficient low-side switching with minimal conduction loss. |
| fT | 100 MHz - transition frequency confirms suitability for audio-frequency amplification and digital signal conditioning up to ~10 MHz. |
| Rth(j-a) | 568 K/W per transistor - quantifies junction-to-ambient thermal resistance in free air; guides heatsinking or airflow requirements. |
Pinout & Package
SOT363-3 (TSSOP6) plastic surface-mounted package with 6 leads, 1.3 mm × 2.2 mm footprint, 0.65 mm pitch, and exposed pad-less construction - optimized for automated reflow assembly on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of TR1 | Low-impedance current sink node for first transistor; connects directly to ground or emitter resistor in common-emitter configuration. |
| 2 | Base of TR1 | Control input for TR1; requires current-limited drive (e.g., via 10 kΩ resistor) to achieve target hFE-based gain. |
| 3 | Collector of TR2 | High-side output node for second transistor; routes to VCC or load when TR2 operates as switch or amplifier output. |
| 4 | Emitter of TR2 | Independent emitter reference for TR2; allows separate biasing from TR1 - essential for differential or dual-rail designs. |
| 5 | Base of TR2 | Isolated control terminal for TR2; enables asynchronous switching or independent gain staging without shared base network. |
| 6 | Collector of TR1 | Primary output node for TR1; configured as active load, current source, or saturated switch depending on external circuit topology. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent NPN transistors | Eliminates need for two discrete SOT23 devices - reduces PCB area by ~40% and assembly cost in dual-gain or push-pull stages. |
| No mutual interference | Electrically isolated die structure prevents signal coupling between TR1 and TR2 - critical for noise-sensitive analog front-ends. |
| VCEO = 65 V rating | Supports operation across 24 V industrial rails and 48 V telecom interfaces without derating or series protection. |
| VBE(sat) = 770 mV typical | Enables reliable turn-on with standard 3.3 V or 5 V microcontroller GPIOs - no level-shifting required for base drive. |
| FR4-compatible thermal profile | Rated 300 mW total dissipation on single-sided 35 µm Cu PCB - simplifies thermal design for non-heatsinked consumer and IoT modules. |
Applications
| Audio Pre-amplifier Stage | Dual-Rail Logic Level Shifter |
|---|---|
Use Scenario: Boosting weak microphone signals before ADC sampling in portable voice recorders. IC Role / Device Role / Timing Role: Dual NPN configured as cascaded common-emitter amplifiers - TR1 for initial gain, TR2 for impedance matching to codec input. Use Value: 100 MHz fT and 110 hFE ensure flat 20 Hz–20 kHz response; isolated transistors prevent inter-stage oscillation. |
Use Scenario: Translating 1.8 V GPIO outputs to 5 V logic inputs in mixed-voltage MCU systems. IC Role / Device Role / Timing Role: TR1 and TR2 operate as independent emitter followers - each shifts one signal line without loading adjacent channels. Use Value: Low VBE(sat) (770 mV typ.) guarantees full 5 V swing; 65 V VCEO provides margin against bus transients. |
| Compact Relay Driver | Redundant Signal Switch |
Use Scenario: Driving 24 V coil relays from low-power microcontrollers in building automation panels. IC Role / Device Role / Timing Role: TR1 and TR2 function as saturated low-side switches - each controls one relay independently with 100 mA IC headroom. Use Value: 300 mV VCE(sat) limits power loss to <15 mW per channel; SOT363-3 footprint fits tight 10 mm × 10 mm relay zones. |
Use Scenario: Providing failover path selection in medical sensor signal chains where continuity is critical. IC Role / Device Role / Timing Role: TR1 handles primary signal path; TR2 remains standby until fault detection triggers switchover via controller. Use Value: Identical hFE, VCE(sat), and thermal specs ensure seamless substitution; zero crosstalk preserves signal integrity during transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847S | hFE min = 200 (vs. 110), same VCEO/IC/package | Better for high-gain linear amplification; less suitable for saturated switching due to higher base drive demand | Select when gain stability > 200 is required and base current budget allows +80% drive. |
| MBT3904DW1T1G | VCEO = 40 V (vs. 65 V); same SOT363-3 footprint and pinout | Limited to ≤3.3 V/5 V systems; unsuitable for 24 V industrial switching | Choose only for low-voltage consumer designs where 40 V margin suffices and cost is prioritized. |
Compared with BC846S, BC847S offers higher DC gain but demands more base current, while MBT3904DW1T1G sacrifices 25 V of breakdown margin for lower unit cost - making BC846S the balanced choice for 24 V–48 V general-purpose dual-transistor needs.
Availability
BC846S is available at Aetrix Electronics and suitable for audio pre-amplification, relay driving, and dual-rail logic translation requiring stable component supply, consistent parametric performance, and long-term SMT assembly compatibility.
Supply support for BC846S 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 components - headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.
The BC846S belongs to Nexperia's general-purpose bipolar transistor family, engineered for cost-effective, space-efficient replacement of discrete SOT23 transistors in consumer, industrial, and communication equipment.
FAQ
Is BC846S pin-compatible with BC847S?
Yes - BC846S and BC847S share identical SOT363-3 pinout (E1-B1-C2-E2-B2-C1), same thermal footprint, and matching solder land dimensions per Nexperia's reflow and wave soldering guidelines. No PCB redesign is needed when upgrading gain.
What is the maximum allowable ambient temperature for continuous 100 mA operation per transistor?
At 100 mA per transistor, Ptot per transistor is 220 mW. With Rth(j-a) = 568 K/W, junction temperature rise is 125 K. To stay within Tj ≤ 150 °C, maximum ambient is 25 °C - derating required above that per Fig. 1's 300 mW per-device curve.
Can BC846S be used in linear amplifier configurations with VCE = 12 V?
Yes - VCEO = 65 V exceeds 12 V operating point, and hFE remains stable across 1–10 mA collector currents per Fig. 3. Ensure power dissipation stays below 220 mW per transistor (e.g., IC ≤ 18 mA at 12 V) to avoid thermal runaway.
Does BC846S have automotive qualification?
No - BC846S is not AEC-Q101 qualified. Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for safety-critical or automotive use. It lacks extended temperature validation, PPAP documentation, and stress testing per automotive standards.
BC846S,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 NPN (Dual)
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 65V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 110 @ 2mA, 5V
- Power - Max:
- 300mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC846S,125 FAQ
1.How can I place an order for BC846S,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846S,125 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 BC846S,125 reliable?
The price and inventory of BC846S,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846S,125 is usually 5 days.
3.What payment methods are accepted for BC846S,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846S,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846S,125?
BC846S,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846S,125 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 BC846S,125?
For technical support, including BC846S,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846S,125 requirements.
6.How does Aetrix verify that BC846S,125 is sourced from the original manufacturer or authorized distributors?
All BC846S,125 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 BC846S,125 meets industry standards.
7.What is the process for return or replacement of BC846S,125?
All BC846S,125 units undergo pre-shipment inspection (PSI). If there is an issue with BC846S,125, 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 BC846S,125 part is unused and in its original packaging.
Return procedure for BC846S,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846S,125 Tags
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DMMT5401-7-F
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DMMT3906W-7-F
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ULQ2003D1013TR
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ZXTD4591E6TA
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