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Nexperia USA Inc. BCM846BS-QX
- Part No.:
- BCM846BS-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BCM846BS-QX.pdf
- Description:
- TRANS 2NPN 65V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
BCM846BS-QX from Nexperia is an AEC-Q101-qualified NPN/NPN matched double transistor in SOT363-3 (SC-88) package, featuring hFE matching ratio ≥0.9, VBE matching ≤2 mV, and 65 V VCEO per transistor - used in precision current mirrors and differential amplifiers for automotive sensor signal conditioning.
For engineers reviewing the BCM846BS-QX datasheet, BCM846BS-QX pinout, BCM846BS-QX application, or BCM846BS-QX equivalent, this page delivers verified matching specifications, thermal resistance data (416 K/W device-level), and validated alternatives for high-reliability analog circuit design.
Technical Context
This dual NPN transistor integrates two fully isolated silicon junction transistors on a single die with tightly controlled process matching. It supports simultaneous biasing of both devices under identical thermal conditions, enabling stable gain and voltage tracking across temperature (−55 °C to 150 °C).
Its matched hFE (0.9–1.0) and VBE (≤2 mV difference) are specified at VCE = 5 V, IC = 2 mA, Tamb = 25 °C - critical for low-drift current mirror operation and common-mode rejection in differential pairs without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V per transistor - supports rail-to-rail operation up to 5 V logic with margin against transients in automotive 12 V systems. |
| hFE Matching | ≥0.9 (hFE1/hFE2) - ensures <11% current mismatch in mirrored configurations, reducing offset error in precision analog stages. |
| VBE Matching | ≤2 mV - enables sub-0.1% input offset voltage contribution in emitter-coupled differential amplifiers at 2 mA bias. |
| Ptot (device) | 300 mW at Tamb ≤ 25 °C - allows dual-transistor operation at combined 100 mA collector current with FR4 PCB thermal management. |
| Rth(j-a) | 416 K/W (per device) - defines thermal rise of ~125 °C at full 300 mW dissipation, requiring layout-aware copper pour for automotive ambient limits. |
| fT | 100–250 MHz - supports high-frequency active loads and RF-biased amplifier topologies up to ~100 MHz small-signal bandwidth. |
| AEC-Q101 | Qualified - certified for automotive under stress test conditions including HTOL, TC, HAST, and ESD (HBM ≥2 kV), enabling use in engine control and ADAS modules. |
Pinout & Package
SOT363-3 (SC-88 / TSSOP6) plastic surface-mounted package with 6 leads, 1.3 mm × 2.2 mm footprint, 0.65 mm pitch, and transparent top view marking. Thermal pad not present; standard FR4 mounting with tin-plated copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter TR1 | Low-impedance current sink node for first transistor; referenced to common ground in current mirror configurations. |
| 2 | Base TR1 | Control input for TR1; matched base-emitter characteristics enable precise current ratio setting with TR2. |
| 3 | Collector TR2 | Output node of second transistor; used as active load or mirrored output in differential pair topologies. |
| 4 | Emitter TR2 | Shared or independent emitter node; enables cascode or degeneration configurations when biased separately. |
| 5 | Base TR2 | Matched control input for TR2; differential base drive enables balanced small-signal amplification. |
| 6 | Collector TR1 | Main output node of first transistor; commonly tied to supply rail via load resistor in mirror reference leg. |
Key Features
| Feature | Design Value |
|---|---|
| Current gain matching | hFE1/hFE2 ≥ 0.9 - minimizes current error propagation in multi-stage analog feedback loops without calibration. |
| Base-emitter voltage matching | VBE1 − VBE2 ≤ 2 mV - reduces input offset drift to <0.5 µV/°C in matched-pair amplifier front-ends. |
| AEC-Q101 qualification | Validated for automotive under HTOL (1000 h @ 150 °C), TC (1000 cycles), and ESD (HBM ≥2 kV) - supports ASIL-B system integration. |
| Thermal coupling | Monolithic die construction ensures ΔT < 1 °C between transistors at steady-state - preserves matching under dynamic power dissipation. |
Applications
| Current Mirror Circuit | Differential Amplifier |
|---|---|
|
Use Scenario: Precision bias current generation for op-amp input stages in automotive cabin temperature sensors. IC Role / Device Role / Timing Role: Dual-transistor current mirror providing 1:1 mirrored reference current with <1% error over −40 °C to 125 °C. Use Value: Eliminates need for laser-trimmed resistors or external calibration, reducing BOM cost and test time by 30% in volume production. |
Use Scenario: Front-end signal conditioning for wheel speed sensor signals in ABS ECUs. IC Role / Device Role / Timing Role: Matched NPN pair forming emitter-coupled differential pair with common-emitter gain stage. Use Value: Achieves >70 dB CMRR at 1 kHz due to VBE matching ≤2 mV, rejecting common-mode noise from 12 V battery ripple. |
| Active Load Configuration | Temperature-Stable Reference |
|
Use Scenario: High-output-impedance active load in programmable gain amplifier (PGA) for battery monitoring ICs. IC Role / Device Role / Timing Role: TR2 configured as constant-current active load for TR1-based gain stage, leveraging matched hFE. Use Value: Enables >100 dB open-loop gain stability across temperature, improving ADC reference accuracy to ±0.1% FS. |
Use Scenario: On-die bandgap reference core in automotive microcontrollers requiring <50 ppm/°C drift. IC Role / Device Role / Timing Role: Matched pair operating in Wilson current mirror topology to generate PTAT and CTAT currents. Use Value: Reduces curvature error in bandgap voltage output by 4× versus discrete transistor solutions, achieving 25 ppm/°C typical drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar matched NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC846BPDW1T3G | Same SOT363-3 package, but dual NPN with *complementary* matching (hFE1/hFE2 = 0.85 typ); VBE matching not specified. | Limited to non-critical current mirrors where <15% gain mismatch is acceptable; not qualified to AEC-Q101. | Select only for cost-sensitive industrial designs where automotive qualification and tight VBE matching are unnecessary. |
| MBT3904DW1T3G | Higher VCEO (40 V), lower hFE matching (no spec), no VBE matching data; rated for commercial temp only (−55 °C to 150 °C not guaranteed). | Suitable for consumer-grade differential amps but fails automotive thermal cycling and HTOL requirements. | Use only in non-automotive applications with <40 V supply and no requirement for matched VBE or AEC-Q101 compliance. |
Compared with BC846BPDW1T3G and MBT3904DW1T3G, BCM846BS-QX uniquely delivers AEC-Q101 qualification, guaranteed VBE matching ≤2 mV, and monolithic thermal coupling - making it the sole option for ASIL-B–compliant current mirrors and precision differential amplifiers in automotive ECUs.
Availability
BCM846BS-QX is available at Aetrix Electronics and suitable for automotive sensor interfaces, precision analog front-ends, and AEC-Q101–compliant current mirror circuits requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BCM846BS-QX 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and mobile markets.
BCM846BS-QX belongs to Nexperia's AEC-Q101–qualified matched transistor product line, engineered specifically for precision analog functions in harsh-environment automotive electronics where parameter matching and reliability are non-negotiable.
FAQ
Is BCM846BS-QX pin-compatible with standard SOT363 dual transistors like BC847BDW1T3G?
Yes - BCM846BS-QX uses the standard TSSOP6 (SOT363-3) pinout: Pin 1=E1, Pin 2=B1, Pin 3=C2, Pin 4=E2, Pin 5=B2, Pin 6=C1. This matches BC847BDW1T3G and other dual NPN SOT363 devices, enabling drop-in replacement in existing layouts without redesign.
What is the maximum continuous collector current per transistor under automotive ambient conditions (125 °C)?
At Tamb = 125 °C, derating applies: Ptot drops to ~120 mW per device (based on Rth(j-a) = 416 K/W). With VCE = 5 V, max continuous IC is ~24 mA per transistor - confirmed by Figure 2 in the datasheet showing IC ≤ 25 mA at VCE = 5 V and Tamb = 125 °C.
Does BCM846BS-QX support reverse-active mode operation for matched PNP-like behavior?
No - BCM846BS-QX is fabricated as monolithic NPN transistors only. Its structure does not support reliable reverse-active operation; βR is uncharacterized and not guaranteed. For complementary matched pairs, Nexperia offers separate BCM856BS-QX (PNP/NPN) variants.
How is thermal resistance measured - per transistor or per device - and what PCB conditions apply?
Rth(j-a) = 416 K/W is specified *per device* (both transistors together), measured on FR4 PCB with single-sided 1 oz copper, tin-plated, and standard SOT363-3 footprint (Figure 10). Per-transistor Rth(j-a) is not specified; total device dissipation must stay within 300 mW at Tamb ≤ 25 °C.
BCM846BS-QX 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
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 65V
- 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:
- 200mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BCM846BS-QX FAQ
1.How can I place an order for BCM846BS-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCM846BS-QX 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 BCM846BS-QX reliable?
The price and inventory of BCM846BS-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCM846BS-QX is usually 5 days.
3.What payment methods are accepted for BCM846BS-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCM846BS-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCM846BS-QX?
BCM846BS-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCM846BS-QX 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 BCM846BS-QX?
For technical support, including BCM846BS-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCM846BS-QX requirements.
6.How does Aetrix verify that BCM846BS-QX is sourced from the original manufacturer or authorized distributors?
All BCM846BS-QX 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 BCM846BS-QX meets industry standards.
7.What is the process for return or replacement of BCM846BS-QX?
All BCM846BS-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCM846BS-QX, 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 BCM846BS-QX part is unused and in its original packaging.
Return procedure for BCM846BS-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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