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Nexperia USA Inc. BZB84-B47-QR
- Part No.:
- BZB84-B47-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B47-QR.pdf
- Description:
- BZB84-B47-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,966
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Product details
Overview
BZB84-B47-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 47 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and overvoltage protection circuits.
For engineers reviewing the BZB84-B47-QR datasheet, BZB84-B47-QR pinout, BZB84-B47-QR application, or BZB84-B47-QR equivalent, this device serves as a space-constrained dual-voltage reference in power supply feedback, ESD-clamped I/O protection, and redundant sensing nodes where thermal stability and surge resilience are critical.
Technical Context
This dual common-anode Zener diode integrates two independent 47 V Zener junctions sharing a single anode terminal, enabling symmetrical clamping or dual-rail reference generation without discrete pairing. Its ±2 % voltage tolerance and 0.05 μA reverse current at VR = 43 V support precision regulation in low-power analog monitoring paths.
The device delivers 40 W non-repetitive peak reverse power handling (tp = 100 μs) and exhibits 375 Ω typical differential resistance at IZ = 2 mA, with a temperature coefficient of +42.0 mV/K - optimized for stable operation across –55 °C to +150 °C ambient ranges in engine control units and ADAS sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 46.1 V to 47.9 V at IZ = 2 mA - tight ±2 % tolerance enables accurate 47 V rail clamping without calibration. |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous regulation on standard FR4 PCBs without forced cooling. |
| Non-repetitive Peak Reverse Power | 40 W for tp = 100 μs - withstands transient surges per ISO 7637-2 Pulse 1/2a in automotive subsystems. |
| Differential Resistance rdif | 375 Ω max at IZ = 2 mA - ensures minimal output voltage shift under load variation in feedback loops. |
| Reverse Current IR | 0.05 μA max at VR = 43 V - guarantees low leakage in high-impedance bias networks and battery-backed circuits. |
| Thermal Resistance Rth(j-a) | 417 K/W - defines junction-to-ambient rise under steady-state conduction, critical for derating in enclosed ECUs. |
| Operating Temperature | –55 °C to +150 °C - validated for under-hood automotive environments per AEC-Q101 stress testing. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); 3-terminal configuration with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node requiring 47 V clamping; reverse-biased during normal operation. |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 47 V path - enables dual-sensor referencing or redundancy. |
| 3 (CA) | Common Anode | Shared anode connection; ties both Zeners to system ground or negative rail for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces board area by 50 % vs. two discrete SOT23 Zeners while maintaining independent cathode routing. |
| AEC-Q101 qualification | Validated for automotive use including HTOL, TC, AC/DC HAST, and ESD (HBM ≥ 2 kV), eliminating requalification effort. |
| ±2 % Zener voltage tolerance | Enables direct replacement of legacy 47 V references without trimming resistors in emission control modules. |
| 40 W surge capability | Handles load-dump transients up to 40 V/100 μs without degradation - meets ISO 16750-2 requirement Class D. |
| Low thermal resistance (100 K/W j-to-solder point) | Supports localized heat extraction via thermal vias under pins 1 and 2, improving long-term reliability in high-temp zones. |
Applications
| Engine Control Unit (ECU) Sensor Biasing | Automotive CAN Transceiver Protection |
|---|---|
|
Use Scenario: Providing stable 47 V bias to knock sensor piezoelectric elements in gasoline direct injection engines. IC Role / Device Role / Timing Role: Dual Zener acts as precision voltage clamp and low-leakage reference source for analog front-end amplifiers. Use Value: Maintains signal integrity across –40 °C to +125 °C with <0.1 % drift, eliminating calibration drift in OBD-II compliance testing. |
Use Scenario: Clamping CAN_H/CAN_L lines against ESD and load-dump transients in body control modules. IC Role / Device Role / Timing Role: Common-anode dual Zener provides symmetrical bidirectional clamping to ±47 V on both differential lines. Use Value: Achieves IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) protection without adding series impedance that degrades bit timing. |
| ADAS Camera Module Power Sequencing | Electric Power Steering (EPS) Motor Driver Feedback |
|
Use Scenario: Regulating auxiliary 47 V rail for image sensor bias and ISP core logic in surround-view camera systems. IC Role / Device Role / Timing Role: Dual Zener supplies matched reference voltages for ADC reference and LDO enable thresholds. Use Value: Ensures synchronized power-up sequencing between analog and digital domains, preventing startup glitches in 30 fps video streams. |
Use Scenario: Stabilizing voltage references for current-sense amplifier inputs monitoring three-phase motor phase currents. IC Role / Device Role / Timing Role: One Zener sets upper limit for overcurrent trip threshold; the other calibrates zero-current offset. Use Value: Enables <±1 % current measurement accuracy across 100 °C junction range, critical for torque ripple suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NZX47B | Single Zener in DO-35; no dual configuration or SOT23 footprint | Requires two devices and extra PCB area for dual-rail use; lacks AEC-Q101 qualification | Select only for cost-sensitive non-automotive prototypes where board space is unconstrained. |
| Vishay BZX84-C47 | Single Zener in SOT23; ±5 % tolerance; no common-anode dual structure | Cannot implement symmetrical clamping or shared-anode referencing; higher voltage uncertainty impacts safety margins | Use only when dual functionality is unnecessary and ±5 % tolerance is acceptable for non-safety-critical rails. |
Compared with BZB84-B47-QR, NZX47B increases component count and layout complexity, while BZX84-C47 sacrifices dual-channel integration and automotive qualification - making BZB84-B47-QR the sole option meeting AEC-Q101, ±2 % tolerance, and space-constrained dual-Zener requirements simultaneously.
Availability
BZB84-B47-QR is available at Aetrix Electronics and suitable for automotive power management, sensor interface design, and ESD protection circuits requiring stable component supply with full traceability and long-lifecycle support.
Supply support for BZB84-B47-QR 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments - not general-purpose or commercial-grade use.
FAQ
What is the maximum continuous reverse current rating for BZB84-B47-QR?
The device has no specified continuous reverse current rating; it is designed for regulated Zener operation at IZ = 2 mA (typical test condition). Maximum DC reverse current is limited by its 300 mW total power dissipation - at 47 V, this corresponds to ~6.4 mA absolute maximum under ideal thermal conditions. Derating is required above Tamb = 25 °C per the Rth(j-a) = 417 K/W curve.
Can BZB84-B47-QR be used in place of two separate 47 V Zeners?
Yes - its dual common-anode configuration replaces two discrete SOT23 Zeners while preserving independent cathode access. Pin 1 and Pin 2 serve as separate cathodes; Pin 3 is the shared anode. Layout must maintain equal trace inductance to both cathodes for balanced transient response in clamping applications.
Does the ±2 % tolerance apply to both diodes in the same package?
Yes - the "B" grade designation applies to both integrated Zener junctions. Data sheet Table 9 confirms matched VZ min/max (46.1 V / 47.9 V) for BZB84-B47-QR under identical test conditions (IZ = 2 mA, Tj = 25 °C), ensuring channel-to-channel tracking within tolerance band.
Is thermal pad connection required for reliable operation?
No thermal pad is present in the SOT23 package. Reliability depends on solder joint quality at all three gull-wing leads and PCB copper area under the device body. For sustained 300 mW dissipation, Nexperia recommends minimum 100 mm² of 1-oz copper connected to Pin 3 (CA) with ≥4 thermal vias to inner ground planes.
BZB84-B47-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZB84-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Configuration:
- 1 Pair Common Anode
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZB84-B47-QR FAQ
1.How can I place an order for BZB84-B47-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B47-QR 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 BZB84-B47-QR reliable?
The price and inventory of BZB84-B47-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-B47-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B47-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B47-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B47-QR?
BZB84-B47-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B47-QR 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 BZB84-B47-QR?
For technical support, including BZB84-B47-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B47-QR requirements.
6.How does Aetrix verify that BZB84-B47-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B47-QR 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 BZB84-B47-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B47-QR?
All BZB84-B47-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B47-QR, 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 BZB84-B47-QR part is unused and in its original packaging.
Return procedure for BZB84-B47-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B47-QR Tags
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