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Diodes Incorporated BCM846BS-7
- Part No.:
- BCM846BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BCM846BS-7.pdf
- Description:
- TRANS 2NPN 65V 100MA SOT-363
- Quantity:
- Payment:
- Shipping:
Inventory:8,023
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Product details
Overview
BCM846BS-7 from Diodes Incorporated is a 65V NPN matched pair small-signal transistor in SOT363 package, featuring hFE matching (0.9–1.1), VBE matching (±2 mV), and 100 MHz fT, designed for precision current mirror, differential amplifier, and AF switching applications in automotive and industrial control circuits.
For engineers reviewing the BCM846BS-7 datasheet, BCM846BS-7 pinout, BCM846BS-7 application, or BCM846BS-7 equivalent, key selection criteria include dual-transistor matching tolerance, SOT363 thermal resistance (625°C/W), AEC-Q101 qualification, and 200 mW power dissipation under standard PCB layout conditions.
Technical Context
This matched NPN pair integrates two identical high-gain transistors on a single die with tightly controlled hFE (200–450) and VBE(ON) (610–710 mV) across temperature. Matching performance is specified at VCE = 5 V, IC = 2 mA, enabling stable biasing in analog feedback loops.
The device operates from –65°C to +150°C, supports 4 kV HBM ESD protection, and delivers 100 MHz gain-bandwidth product at IC = 10 mA - confirming suitability for audio-frequency amplification and fast-switching logic interface stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - supports rail-to-rail operation in 48 V automotive subsystems without breakdown risk |
| hFE Matching | 0.9–1.1 - ensures <±10% current ratio error in active-load current mirrors |
| VBE Matching | ±2 mV - enables sub-0.1% offset in differential pair inputs at 2 mA bias |
| fT | 100 MHz - sufficient for wideband audio amplification up to 20 kHz with >5× gain margin |
| PD | 200 mW - limits maximum continuous IC to ~100 mA on standard FR-4 PCB with 1 oz copper |
| RθJA | 625 °C/W - requires thermal pad or reduced ambient to sustain >150°C junction temperature |
| ESD HBM | 4000 V - meets IEC 61000-4-2 Level 4 for robust handling in automated assembly lines |
Pinout & Package
SOT363 is a 6-pin ultra-small surface-mount package (2.15 × 2.10 × 1.0 mm) with exposed thermal pad, rated for moisture sensitivity level 1 and RoHS-compliant matte tin terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of Transistor 1 | Common-emitter reference node for first transistor; tied to ground or bias network |
| 2 | Base of Transistor 1 | Input control terminal for Q1; matched VBE enables precise current steering |
| 3 | Collector of Transistor 1 | Active output node for Q1; shares internal thermal path with Q2 collector |
| 4 | Collector of Transistor 2 | Second active output node; symmetric layout minimizes parasitic coupling between collectors |
| 5 | Base of Transistor 2 | Input control terminal for Q2; matched hFE ensures identical transconductance vs. Q1 |
| 6 | Emitter of Transistor 2 | Second emitter node; independent connection allows cascode or current-mirror tail configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and UHAST |
| hFE and VBE matching | Guaranteed 10% hFE ratio and ±2 mV VBE spread at 2 mA - eliminates manual binning in production |
| SOT363 thermal performance | 625°C/W RθJA with minimal pad area - enables compact placement in space-constrained ECUs |
| Lead-free & halogen-free | Meets RoHS 3 and JEDEC J-STD-020 MSL-1 - supports reflow compatibility and long-term reliability |
Applications
| Current Mirror Circuits | Differential Amplifiers |
|---|---|
Use Scenario: Precision bias current generation in op-amp input stages and voltage references. IC Role / Device Role / Timing Role: Dual NPN matched pair acting as active load and reference leg in Wilson or Widlar configurations. Use Value: ±2 mV VBE matching reduces static error to <0.03% at 2 mA, improving reference stability over temperature. | Use Scenario: Input stage of automotive sensor signal conditioners (e.g., wheel speed, pressure transducers). IC Role / Device Role / Timing Role: Matched transistor pair providing common-mode rejection and linear gain in DC-coupled front ends. Use Value: 0.9–1.1 hFE matching ensures >60 dB CMRR without external trimming components. |
| AF Switching Circuits | Automotive Control Modules |
Use Scenario: Low-power audio switching in infotainment system mute paths and speaker protection relays. IC Role / Device Role / Timing Role: Fast-switching NPN pair driving low-side loads with simultaneous turn-on/turn-off control. Use Value: 100 MHz fT and 100 mV VCE(SAT) at 10 mA enable <1 µs transition times with minimal crossover distortion. | Use Scenario: Engine control unit (ECU) injector driver pre-stage and CAN bus bias networks. IC Role / Device Role / Timing Role: Matched pair used for current sensing, level shifting, and fail-safe pull-up/pull-down in 12 V/24 V domains. Use Value: AEC-Q101 qualification and –65°C to +150°C operation ensure functional safety compliance in under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar matched NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BS-7 | VCEO = 45 V (vs. 65 V); hFE min = 110 (vs. 200); no VBE matching spec | Limited to ≤36 V systems; unsuitable for high-voltage current mirrors requiring tight VBE tracking | Select only if operating voltage <40 V and matching tolerance >±15 mV is acceptable |
| MBT3904DW1T1G | hFE matching not specified; VCEO = 40 V; fT = 300 MHz; SOT-363 but non-AEC-Q101 | Better bandwidth but no guaranteed matching; lacks automotive qualification and thermal derating data | Prefer for high-speed digital switching where matching is secondary to speed |
Compared with BC847BS-7 and MBT3904DW1T1G, BCM846BS-7 uniquely combines AEC-Q101 qualification, 65 V rating, and guaranteed ±2 mV VBE matching - making it the only choice for automotive-grade precision analog functions requiring traceable parametric correlation between transistors.
Availability
BCM846BS-7 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor signal conditioning, and audio switching applications requiring stable component supply and full lifecycle traceability.
Supply support for BCM846BS-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The BCM846BS belongs to Diodes' AEC-Q101-qualified small-signal transistor family, engineered specifically for precision analog functions in harsh-environment electronics where parameter matching and thermal stability are critical.
FAQ
What is the maximum continuous collector current for BCM846BS-7 at 85°C ambient?
At TA = 85°C, the maximum continuous IC is 60 mA. This is derived from the 200 mW power dissipation limit and the 625°C/W thermal resistance: PD = (TJ(max) − TA) / RθJA = (150 − 85) / 625 = 104 mW; then IC ≈ √(PD/RCE(SAT)) yields ~60 mA assuming typical VCE(SAT) of 100 mV.
Does BCM846BS-7 support lead-free reflow soldering per JEDEC J-STD-020?
Yes. BCM846BS-7 is rated MSL-1 (moisture sensitivity level 1) and features matte tin terminations compatible with standard Pb-free reflow profiles up to 260°C peak. The SOT363 package passes J-STD-020 testing without popcorn or delamination.
Can BCM846BS-7 be used in a cascode configuration?
Yes. Pin 1 (Q1 emitter) and Pin 6 (Q2 emitter) are independently accessible, allowing Q1 to serve as the lower transistor and Q2 as the upper cascode device. The matched hFE and VBE ensure consistent bias point setting across both devices under varying temperature.
Is there a SPICE model available for BCM846BS-7?
Diodes Incorporated provides a generic BC846B SPICE model on its website, but no device-specific model for the matched pair BCM846BS-7. Engineers should use two instances of the BC846B model with correlated parameters (hFE, VBE) to simulate matching behavior in circuit simulators.
BCM846BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 NPN (Dual) Matched Pair
- 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:
- 100MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BCM846BS-7 FAQ
1.How can I place an order for BCM846BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCM846BS-7 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-7 reliable?
The price and inventory of BCM846BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCM846BS-7 is usually 5 days.
3.What payment methods are accepted for BCM846BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCM846BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCM846BS-7?
BCM846BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCM846BS-7 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-7?
For technical support, including BCM846BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCM846BS-7 requirements.
6.How does Aetrix verify that BCM846BS-7 is sourced from the original manufacturer or authorized distributors?
All BCM846BS-7 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-7 meets industry standards.
7.What is the process for return or replacement of BCM846BS-7?
All BCM846BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with BCM846BS-7, 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-7 part is unused and in its original packaging.
Return procedure for BCM846BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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