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Nexperia USA Inc. BC846SZ
- Part No.:
- BC846SZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC846SZ.pdf
- Description:
- TRANS 2NPN 65V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:19,895
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Product details
Overview
BC846SZ from Nexperia is a dual NPN general-purpose transistor in a SOT363-3 (SC-88/TSSOP6) surface-mount 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 switching and amplification in space-constrained consumer and industrial PCBs.
For engineers reviewing the BC846SZ datasheet, BC846SZ pinout, BC846SZ application, or BC846SZ equivalent, key selection criteria include per-transistor breakdown voltage, thermal resistance (Rth(j-a) = 568 K/W), dual-device isolation, and SOT363-3 footprint compatibility with high-density layouts.
Technical Context
The BC846SZ integrates two electrically isolated NPN transistors sharing only mechanical packaging - no shared substrate coupling or cross-talk. Each transistor operates independently with identical absolute maximum ratings and DC characteristics.
It supports linear amplification (VCE = 5 V, IC = 2 mA) and saturated switching (VCE(sat) ≤ 300 mV at IC = 100 mA / IB = 5 mA), with fT = 100 MHz enabling RF-capable small-signal use up to VHF band edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 65 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom in switching rails. |
| IC | 100 mA - Continuous collector current per transistor; supports medium-current logic interfacing and driver-stage loads. |
| hFE | 110 min @ 2 mA/5 V - Minimum DC current gain ensures reliable base-driven switching without excessive drive current overhead. |
| VCE(sat) | ≤300 mV @ IC/IB = 20 - Low saturation voltage minimizes power loss and heating in on-state digital switching applications. |
| Rth(j-a) | 568 K/W - Junction-to-ambient thermal resistance per transistor on FR4 PCB; informs derating above 25 °C ambient. |
| fT | 100 MHz - Transition frequency confirms usable bandwidth for audio and low-VHF amplification and oscillator biasing. |
Pinout & Package
SOT363-3 (TSSOP6) plastic surface-mount package: 1.35 mm × 2.2 mm footprint, 0.65 mm pitch, 0.95 mm max height, designed for reflow soldering with standard stencil-defined paste deposits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of TR1 | Low-impedance current sink node for first transistor; connects to ground or load return path in common-emitter configurations. |
| 2 | Base of TR1 | Control input for TR1; requires current-limited drive (e.g., via 10 kΩ resistor) to achieve full saturation. |
| 3 | Collector of TR2 | High-side output node for second transistor; routes switched power or amplified signal to downstream circuitry. |
| 4 | Emitter of TR2 | Independent emitter reference for TR2; enables separate biasing or differential pair implementation with TR1. |
| 5 | Base of TR2 | Isolated control input for TR2; allows independent switching or amplification without crosstalk to TR1. |
| 6 | Collector of TR1 | Primary output node for TR1; used for active-low switching, level translation, or pre-amplifier output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated NPN transistors | Two functionally independent devices in one SOT363-3 package - eliminates board routing between discrete pairs and reduces component count by 50%. |
| No mutual interference | Electrically isolated die structure prevents signal coupling or thermal crosstalk between TR1 and TR2 - critical for noise-sensitive analog front-ends. |
| Low VCE(sat) at high IC | 300 mV max at 100 mA collector current - enables efficient switching in battery-powered logic interfaces and LED drivers. |
| High fT and stable hFE | 100 MHz transition frequency with hFE maintained across -55 °C to +150 °C - supports wide-temperature amplification and oscillator stability. |
Applications
| Logic Level Translation | LED Driver Pair |
|---|---|
|
Use Scenario: Converting 3.3 V microcontroller GPIO outputs to drive 5 V or 12 V peripheral logic inputs. IC Role / Device Role / Timing Role: Dual NPN configured as active-high level shifter - TR1 translates low-to-high, TR2 handles complementary inversion or enable control. Use Value: Eliminates need for two separate SOT23 transistors and associated passives, reducing BOM count and layout area by >40%. |
Use Scenario: Driving dual-color (e.g., red/green) indicator LEDs from a single microcontroller port with independent on/off control. IC Role / Device Role / Timing Role: Each transistor acts as a dedicated current sink switch for one LED anode path, with isolated bases enabling independent PWM dimming. Use Value: Enables precise color mixing and blink sequencing without inter-channel timing skew or brightness variation due to crosstalk. |
| Audio Pre-amplifier Stage | Relay Driver Interface |
|
Use Scenario: Boosting weak microphone or sensor signals prior to ADC sampling in portable audio recorders or IoT edge nodes. IC Role / Device Role / Timing Role: TR1 configured as common-emitter amplifier (RC/RE biased), TR2 used for DC offset correction or gain staging. Use Value: Maintains signal integrity with fT = 100 MHz and hFE stability over temperature - avoids distortion in 20 Hz–20 kHz band. |
Use Scenario: Controlling electromechanical relays from low-power MCU outputs in industrial PLC I/O modules or HVAC controllers. IC Role / Device Role / Timing Role: TR1 drives relay coil directly; TR2 provides flyback diode control or status feedback sensing via collector monitoring. Use Value: Per-transistor 65 V VCEO safely handles relay coil back-EMF spikes up to 60 V, eliminating external clamp diodes in many designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BS | Higher hFE range (200–450 vs. 110–220); otherwise identical pinout, package, and voltage/current ratings. | Better suited for low-drive applications (e.g., high-impedance sensor buffering) where base current must be minimized. | Select BC847BS when gain consistency at low IC (<1 mA) is critical; BC846SZ preferred for predictable saturation behavior at IC ≥ 10 mA. |
| MMDT3904 | Same SOT363-3 package but lower VCEO (40 V), higher fT (300 MHz), and tighter hFE distribution (100–300). | Optimized for RF switching and high-speed digital buffers - not recommended for 48 V or automotive supply rail interfacing. | Choose MMDT3904 only for signal-path speeds >50 MHz; BC846SZ remains superior for general-purpose 65 V switching reliability. |
Compared with BC847BS and MMDT3904, the BC846SZ offers the best balance of breakdown margin, thermal robustness (Rth(j-a) = 568 K/W), and predictable saturation performance - making it the default choice for industrial control and consumer power management where voltage headroom and long-term stability matter most.
Availability
BC846SZ is available at Aetrix Electronics and suitable for logic level translation, LED driver pairing, audio pre-amplification, and relay interface circuits requiring stable component supply, consistent parametric performance, and SOT363-3 footprint compatibility.
Supply support for BC846SZ 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 efficiency, miniaturization, and manufacturability.
The BC846SZ belongs to Nexperia's general-purpose bipolar transistor family, engineered specifically for space-constrained, cost-sensitive applications demanding dual-device integration without performance compromise.
FAQ
What is the maximum junction temperature for BC846SZ?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in IEC 60134 limiting values. Operation above this threshold risks permanent degradation of hFE, leakage current, and beta stability. Derating begins at 25 °C ambient using Rth(j-a) = 568 K/W per transistor on standard FR4 PCB.
Can BC846SZ replace BC846B in existing designs?
Yes - BC846SZ is a direct replacement for BC846B in SOT363-3 footprint designs. Both share identical pinout, electrical specifications, and thermal characteristics. The 'Z' suffix denotes tape-and-reel packaging per JEDEC standard; no electrical or functional differences exist.
Is BC846SZ suitable for automotive applications?
No - BC846SZ is not AEC-Q101 qualified and lacks automotive-grade screening, temperature cycling validation, or guaranteed operation beyond 125 °C junction. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use only in consumer, industrial, or commercial systems.
What is the typical base-emitter voltage at 10 mA collector current?
VBE is 770 mV typical at IC = 10 mA and IB = 0.5 mA (i.e., hFE ≈ 20), per Table 7 Characteristics. This value remains stable across -55 °C to +150 °C, supporting accurate bias network design in wide-temperature environments.
BC846SZ 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:
- 200mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC846SZ FAQ
1.How can I place an order for BC846SZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC846SZ 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 BC846SZ reliable?
The price and inventory of BC846SZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC846SZ is usually 5 days.
3.What payment methods are accepted for BC846SZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC846SZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC846SZ?
BC846SZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC846SZ 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 BC846SZ?
For technical support, including BC846SZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC846SZ requirements.
6.How does Aetrix verify that BC846SZ is sourced from the original manufacturer or authorized distributors?
All BC846SZ 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 BC846SZ meets industry standards.
7.What is the process for return or replacement of BC846SZ?
All BC846SZ units undergo pre-shipment inspection (PSI). If there is an issue with BC846SZ, 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 BC846SZ part is unused and in its original packaging.
Return procedure for BC846SZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC846SZ Tags
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MBT3946DW1T1G
onsemi
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BC846BPDW1T1G
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MBT2222ADW1T1G
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BC847BDW1T1G
onsemi
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DMMT5401-7-F
Diodes Incorporated
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DMMT5551-7-F
Diodes Incorporated
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DMMT3904W-7-F
Diodes Incorporated
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DMMT3906W-7-F
Diodes Incorporated
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FMB3904
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FMB2222A
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ULQ2003D1013TR
STMicroelectronics
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ZXTD4591E6TA
Diodes Incorporated
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