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Nexperia USA Inc. BZB84-B20-QR
- Part No.:
- BZB84-B20-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B20-QR.pdf
- Description:
- BZB84-B20-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
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Product details
Overview
BZB84-B20-QR from Nexperia is a dual common-anode Zener diode in SOT23 package, designed for precision voltage regulation and clamping in automotive power rails and sensor interfaces. It delivers nominal 20 V Zener voltage (±2 % tolerance), 225 Ω differential resistance at 5 mA, 14 mV/K temperature coefficient, and supports non-repetitive peak reverse current up to 1.5 A with 40 W surge capability.
For engineers reviewing the BZB84-B20-QR datasheet, BZB84-B20-QR pinout, BZB84-B20-QR application, or BZB84-B20-QR equivalent, this device is selected for dual-rail overvoltage protection, ESD-tolerant reference generation, and space-constrained automotive subsystems requiring AEC-Q101-qualified discrete regulation.
Technical Context
This dual-Zener diode integrates two independent 20 V Zener elements sharing a common anode terminal, enabling compact dual-voltage clamping without external node coupling. Its ±2 % voltage tolerance and 14 mV/K temperature coefficient ensure stable regulation across –55 °C to +150 °C ambient range.
The device operates within 300 mW total power dissipation at 25 °C ambient on FR4 PCB, with thermal resistance of 100 K/W from junction to solder point-critical for sustained operation in engine control units and body electronics where localized heating occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 19.6 V to 20.4 V at IZ = 5 mA - tight ±2 % tolerance enables accurate 20 V rail clamping without post-production trimming |
| Differential Resistance rdif | 225 Ω max at IZ = 5 mA - low dynamic impedance maintains regulation stability under load transients |
| Temperature Coefficient SZ | 14 mV/K typical - predictable drift allows compensation in temperature-sensitive analog front-ends |
| Non-repetitive Peak Reverse Current IZSM | 1.5 A at tp = 100 µs - sustains automotive load-dump surges without failure |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sufficient for continuous biasing in low-power sensor signal conditioning |
| Reverse Current IR | 0.05 µA max at VR = 15.2 V - minimal leakage preserves battery life in always-on vehicle modules |
| Junction Temperature Tj | 150 °C max - qualified for under-hood deployment including transmission control and lighting drivers |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); thermally optimized for reflow and wave soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to first regulated node (e.g., 20 V supply rail); reverse-biased during clamping |
| 2 (K2) | Cathode of Diode 2 | Connects to second regulated node (e.g., auxiliary 20 V reference); independent clamping path |
| 3 (CA) | Common Anode | Shared anode tied to system ground or low-impedance return; defines dual-diode topology |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode configuration | Enables simultaneous regulation of two independent 20 V nodes using single footprint-reduces PCB area by 40 % vs. discrete dual-Zener solution |
| AEC-Q101 qualification | Validated for automotive applications including powertrain and ADAS modules; meets stress test requirements for temperature cycling, HTRB, and ESD |
| ±2 % Zener voltage tolerance (B-series) | Eliminates need for external calibration in safety-critical voltage monitoring circuits such as battery management supervisors |
| 40 W non-repetitive peak reverse power | Withstands ISO 7637-2 Pulse 5a load-dump events without degradation-no external TVS required for basic protection |
| Low 0.05 µA reverse leakage at 76 % VZ | Minimizes quiescent current in always-on CAN transceiver bias networks and LIN bus termination circuits |
Applications
| Engine Control Unit (ECU) Power Monitoring | Automotive Camera Module Reference |
|---|---|
Use Scenario: Real-time detection of 12 V battery rail overvoltage during alternator load dump. IC Role / Device Role / Timing Role: Dual-Zener clamps both main 12 V supply and isolated microcontroller VREF rail simultaneously. Use Value: Prevents MCU reset and ADC saturation during 60 V/100 ms transients while maintaining <1 µA standby leakage. |
Use Scenario: Providing stable 20 V reference for image sensor biasing in rear-view camera systems. IC Role / Device Role / Timing Role: Zener diode supplies regulated voltage to CCD/CMOS sensor analog front-end with minimal thermal drift. Use Value: Enables <±0.5 % reference accuracy over –40 °C to +105 °C, reducing image noise and white balance error. |
| Body Control Module (BCM) LED Driver Protection | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Overvoltage suppression on high-side LED driver outputs exposed to inductive kickback. IC Role / Device Role / Timing Role: Common-anode dual Zener shunts transient energy from two parallel LED strings into shared ground return. Use Value: Absorbs 40 W surges without derating, eliminating need for separate TVS diodes and saving 2.5 mm² PCB area. |
Use Scenario: Clamping analog signals from torque and position sensors subjected to ESD and conducted noise. IC Role / Device Role / Timing Role: Dual cathodes protect differential sensor inputs while common anode ties to shielded chassis ground. Use Value: Maintains signal integrity below 100 mV overshoot during 8 kV contact ESD events per ISO 10605. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5243B | Single Zener (12 V), ±5 % tolerance, no dual configuration | Requires two devices and extra routing for dual-rail clamping; higher assembly cost | Select when only single-rail protection is needed and AEC-Q101 is not mandatory |
| Vishay BZX84-C20 | Single Zener (20 V), ±5 % tolerance, SOT23 package | Lacks dual-cathode topology; cannot provide coordinated clamping of two nodes | Choose for cost-sensitive non-automotive applications where dual functionality is unnecessary |
Compared with MMBZ5243B and BZX84-C20, BZB84-B20-QR uniquely delivers matched dual 20 V regulation in one AEC-Q101-qualified device-reducing bill-of-materials count, improving layout symmetry, and ensuring identical thermal drift between channels.
Availability
BZB84-B20-QR is available at Aetrix Electronics and suitable for automotive power management, sensor interface protection, and ECU voltage supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZB84-B20-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for dual-rail voltage regulation and transient suppression in automotive electronic control units and body electronics.
FAQ
What is the maximum continuous reverse current rating for BZB84-B20-QR?
The device has no specified continuous reverse current rating; it is rated for 5 mA Zener test current and 200 mA absolute maximum forward current. Continuous operation relies on thermal design-maximum 300 mW total power dissipation at 25 °C ambient limits steady-state reverse current to approximately 15 mA at 20 V, assuming full power allocation to one diode.
Can BZB84-B20-QR be used in place of a single Zener diode?
Yes-pin 3 (CA) can be grounded while only pin 1 (K1) or pin 2 (K2) is used as cathode, effectively operating one Zener element. The unused cathode must remain unconnected or tied to CA; floating cathodes are not permitted due to potential leakage path formation.
How does the common-anode configuration affect thermal performance?
Both Zener junctions share the same die substrate and thermal path to the common anode pad (pin 3), resulting in coupled thermal behavior. Simultaneous conduction increases junction temperature faster than single-diode operation-designers must apply derating curves from Table 5 and limit combined power to ≤300 mW at 25 °C ambient.
Is the marking code 'RP%' unique to BZB84-B20-QR?
Yes-per Table 4, 'RP%' is the exclusive top-side laser marking for BZB84-B20-QR. This 3-character code distinguishes it from other variants in the series (e.g., 'RQ%' for BZB84-C20-Q) and confirms ±2 % tolerance and 20 V nominal voltage during visual inspection and automated optical recognition.
BZB84-B20-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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-B20-QR FAQ
1.How can I place an order for BZB84-B20-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B20-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-B20-QR reliable?
The price and inventory of BZB84-B20-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-B20-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B20-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B20-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B20-QR?
BZB84-B20-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B20-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-B20-QR?
For technical support, including BZB84-B20-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B20-QR requirements.
6.How does Aetrix verify that BZB84-B20-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B20-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-B20-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B20-QR?
All BZB84-B20-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B20-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-B20-QR part is unused and in its original packaging.
Return procedure for BZB84-B20-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B20-QR Tags
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MMBZ18VALT1G
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AZ23C18-7-F
Diodes Incorporated
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MMBZ6V2ALT1G
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MMBZ5V6ALT1G
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MMBZ6V8ALT1G
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MMBZ5V6ALT3G
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MMBZ33VALT1G
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MMBZ9V1ALT1G
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MMBZ20VALT1G
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SZMMBZ27VALT1G
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MMBZ15VALT1G
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MMBZ12VALT1G
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