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Nexperia USA Inc. BZB84-B15-QR
- Part No.:
- BZB84-B15-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B15-QR.pdf
- Description:
- BZB84-B15-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,283
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Product details
Overview
BZB84-B15-QR from Nexperia is a dual Zener diode in SOT23 package with common anode configuration, rated for 15 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It delivers stable reference voltage in compact space-constrained designs such as engine control units and body electronics.
For engineers reviewing the BZB84-B15-QR datasheet, BZB84-B15-QR pinout, BZB84-B15-QR application, or BZB84-B15-QR equivalent, key selection criteria include dual-Zener topology, ±2 % voltage tolerance, common-anode terminal arrangement, non-repetitive surge capability up to 40 W, and automotive-grade reliability per AEC-Q101.
Technical Context
This dual Zener diode integrates two independent 15 V Zener elements sharing a common anode (Pin 3), enabling bidirectional voltage clamping or dual-rail reference generation in a single SOT23 footprint. Each diode supports 5 mA test current and exhibits 75 Ω typical differential resistance at that bias point.
The device operates across −55 °C to +150 °C ambient range, with thermal resistance from junction to ambient of 417 K/W on standard FR4 PCB. Its temperature coefficient is +9.2 mV/K at 5 mA, ensuring predictable drift behavior in automotive thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.7 V to 15.3 V at IZ = 5 mA - tight ±2 % tolerance ensures precise voltage reference stability in feedback loops |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - enables transient overvoltage suppression without failure during short surges |
| Differential Resistance | 75 Ω max at IZ = 5 mA - low impedance improves regulation accuracy under varying load conditions |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 12 V - minimal leakage preserves battery life in always-on automotive circuits |
| Junction Temperature | 150 °C max - supports operation in under-hood environments without derating below full rating |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, three terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node requiring 15 V reference or clamping; reverse-biased during Zener operation |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 15 V Zener path; enables dual-rail or redundancy configurations |
| 3 (CA) | Common Anode | Shared anode connection; ties both Zeners to system ground or low-side reference point |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener topology | Two matched 15 V Zener elements in one SOT23 package reduce board area by ~40 % vs. discrete dual-diode solutions |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per stress-test standard |
| ±2 % voltage tolerance | Enables high-accuracy voltage references without external trimming in engine ECU sensor interfaces and ADAS power monitors |
| Common anode configuration | Supports symmetrical clamping across two rails or shared ground return in dual-supply systems like CAN transceiver bias networks |
| Low thermal resistance | Rth(j-sp) = 100 K/W to solder point allows direct thermal coupling to PCB copper for sustained 300 mW operation |
Applications
| Engine Control Unit (ECU) Reference | Body Control Module (BCM) Clamping |
|---|---|
Use Scenario: Providing stable 15 V reference for analog sensor signal conditioning in gasoline/diesel engine ECUs. IC Role / Device Role / Timing Role: Zener diode functions as precision voltage reference for ADC input scaling and op-amp biasing. Use Value: ±2 % tolerance and +9.2 mV/K TC ensure <±1.5 % total error across −40 °C to +125 °C operating range. |
Use Scenario: Bidirectional overvoltage protection on LIN bus lines and interior lighting driver outputs in BCMs. IC Role / Device Role / Timing Role: Dual Zener clamps positive and negative transients using common-anode architecture. Use Value: 40 W non-repetitive peak power withstands ISO 7637-2 Pulse 1/2a surges without degradation. |
| ADAS Camera Power Monitor | Infotainment System Voltage Supervisor |
Use Scenario: Monitoring 12 V supply rail integrity in surround-view camera modules with wake-up logic. IC Role / Device Role / Timing Role: Zener diode feeds comparator input to detect undervoltage/overvoltage faults. Use Value: 0.05 µA reverse leakage at 12 V prevents false triggers during sleep mode, extending battery runtime. |
Use Scenario: Generating dual threshold voltages for reset supervision in head unit main SoC power domains. IC Role / Device Role / Timing Role: Two independent 15 V Zeners set separate UVLO/OVLO thresholds via resistor dividers. Use Value: Matched VZ tracking between diodes minimizes threshold mismatch to <0.1 V across temperature. |
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 MMBZ5245BS | Single Zener (15 V), SOT23, ±5 % tolerance, no AEC-Q101 qualification | Limited to non-automotive industrial or consumer use; lacks dual-cathode functionality | Select only for cost-sensitive non-automotive designs where dual-Zener topology is unnecessary |
| Vishay BZX84-C15 | Single Zener (15 V), SOT23, ±5 % tolerance, AEC-Q101 qualified but no dual-element integration | Requires two devices for dual-rail function; increases PCB area and assembly cost | Choose when legacy compatibility with BZX84 footprint is mandatory and dual-cathode layout is not required |
Compared with MMBZ5245BS and BZX84-C15, BZB84-B15-QR uniquely provides dual 15 V Zener elements with ±2 % tolerance and AEC-Q101 qualification in one SOT23 package-enabling space-efficient, high-accuracy, automotive-grade voltage regulation unattainable with single-diode alternatives.
Availability
BZB84-B15-QR is available at Aetrix Electronics and suitable for automotive engine control, body electronics, ADAS camera modules, and infotainment systems requiring stable component supply with AEC-Q101 compliance and tight voltage tolerance.
Supply support for BZB84-B15-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 essential semiconductors for automotive, industrial, and consumer markets.
The BZB84-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature vehicle subsystems.
FAQ
What is the Zener voltage tolerance for BZB84-B15-QR?
BZB84-B15-QR has a nominal Zener voltage of 15 V with ±2 % tolerance, meaning guaranteed operation between 14.7 V and 15.3 V at 5 mA test current. This tighter tolerance than standard ±5 % Zeners supports higher-precision voltage references in automotive sensor interfaces and power supervisors.
Can BZB84-B15-QR be used for bidirectional transient voltage suppression?
Yes - its dual-cathode/common-anode configuration allows simultaneous clamping of positive and negative transients on a single net. When connected with CA grounded and K1/K2 tied to the protected line, it limits voltage excursions to +15.3 V and −15.3 V relative to ground, meeting ISO 16750-2 surge requirements.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C ambient at 2.4 mW/°C, based on Rth(j-a) = 417 K/W. At 85 °C ambient, maximum continuous power drops to 156 mW. For sustained 300 mW operation, ensure PCB copper area and airflow maintain case temperature ≤ 25 °C.
How does the temperature coefficient affect regulation accuracy?
BZB84-B15-QR has a typical temperature coefficient of +9.2 mV/K at 5 mA, meaning its Zener voltage increases ~0.138 V over a 15 °C rise. In a −40 °C to +125 °C range, this contributes up to ±1.1 V drift, which must be accounted for in high-accuracy references - compensated via circuit design or calibration.
BZB84-B15-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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-B15-QR FAQ
1.How can I place an order for BZB84-B15-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B15-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-B15-QR reliable?
The price and inventory of BZB84-B15-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-B15-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B15-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B15-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B15-QR?
BZB84-B15-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B15-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-B15-QR?
For technical support, including BZB84-B15-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B15-QR requirements.
6.How does Aetrix verify that BZB84-B15-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B15-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-B15-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B15-QR?
All BZB84-B15-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B15-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-B15-QR part is unused and in its original packaging.
Return procedure for BZB84-B15-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B15-QR Tags
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