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Nexperia USA Inc. BZB84-B9V1-QR
- Part No.:
- BZB84-B9V1-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B9V1-QR.pdf
- Description:
- BZB84-B9V1-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,292
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Product details
Overview
BZB84-B9V1-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 9.1 V nominal Zener voltage (±2 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation and clamping functions.
For engineers reviewing the BZB84-B9V1-QR datasheet, BZB84-B9V1-QR pinout, BZB84-B9V1-QR application, or BZB84-B9V1-QR equivalent, this device serves as a space-efficient dual-voltage reference for bidirectional overvoltage protection, rail-to-rail clamping, and precision biasing in compact automotive ECUs and industrial sensor interfaces.
Technical Context
This dual-common-anode Zener diode integrates two independent 9.1 V Zener elements sharing a single anode terminal, enabling symmetrical clamping across differential signals or complementary rail protection without external node routing. Its ±2 % voltage tolerance and low 150 Ω typical differential resistance at 5 mA ensure stable regulation under varying load conditions.
The device operates within −55 °C to +150 °C ambient range, supports non-repetitive 40 W surge pulses (100 µs square wave), and exhibits a positive temperature coefficient of +3.8 mV/K at 5 mA, minimizing thermal drift in high-temperature engine bay deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 9.1 V nominal, ±2 % tolerance (8.92–9.28 V), ensures tight voltage reference for precision clamping circuits |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB, defines maximum continuous thermal load in surface-mount layout |
| Differential Resistance rdif | 100 Ω max at IZ = 5 mA, determines regulation stiffness and output impedance in feedback paths |
| Non-repetitive Peak Power | 40 W for 100 µs pulse, enables transient surge suppression in CAN/LIN bus protection stages |
| Reverse Current IR | 0.5 µA max at VR = 7.3 V, guarantees low leakage in high-impedance bias networks |
| Thermal Resistance Rth(j-a) | 417 K/W junction-to-ambient, informs derating curves for operation above 25 °C ambient |
| AEC-Q101 Qualified | Qualified per Automotive Electronics Council stress test standard, validated for under-hood reliability |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch), optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated or clamped node requiring 9.1 V reference relative to common anode |
| 2 (K2) | Cathode of Diode 2 | Provides second independent 9.1 V clamping path-enables dual-rail or differential signal protection |
| 3 (CA) | Common Anode | Shared anode node; ties both Zeners to system ground or reference potential in common-cathode topology |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener with common anode | Enables symmetrical bidirectional clamping using one footprint-reduces board area vs. discrete dual-diode solutions |
| ±2 % Zener voltage tolerance | Supports tighter regulation margins in safety-critical automotive sensors where voltage accuracy directly impacts ADC linearity |
| AEC-Q101 qualification | Validated for automotive grade-1 (−40 °C to +125 °C case) and grade-2 (−40 °C to +150 °C ambient) environments |
| 40 W non-repetitive surge rating | Withstands ISO 7637-2 Pulse 1/2a/3a transients without degradation-eliminates need for external TVS in cost-sensitive modules |
| Low 0.5 µA reverse leakage | Maintains signal integrity in high-impedance analog front-ends (e.g., thermistor biasing) without loading error |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping LIN bus transceiver I/O pins against load-dump and jump-start transients. IC Role / Device Role / Timing Role: Dual Zener provides bidirectional rail-to-rail voltage limiting on TX/RX lines referenced to local ground. Use Value: Prevents transceiver latch-up during 12 V system surges up to 40 V, meeting ISO 11898-3 immunity requirements without added components. |
Use Scenario: Stabilizing excitation voltage for 4–20 mA current-loop pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Acts as precision shunt reference for op-amp-based current source, regulating 9.1 V across sense resistor. Use Value: Delivers ±0.18 V regulation window (±2 %) ensuring <0.5 % full-scale error in 16-bit DAC-controlled loops. |
| Automotive Infotainment Power Sequencing | Medical Patient Monitor Analog Front-End |
Use Scenario: Protecting USB-C PD controller VBUS monitoring inputs from overvoltage during adapter hot-plug events. IC Role / Device Role / Timing Role: Common-anode dual Zener clamps both high-side and low-side monitor nodes to 9.1 V relative to system ground. Use Value: Limits input voltage to within ±5 % of ADC reference, avoiding saturation and enabling accurate real-time VBUS tracking. |
Use Scenario: Biasing photodiode amplifier stages in portable ECG devices where ultra-low leakage is critical. IC Role / Device Role / Timing Role: Provides low-noise, low-drift DC bias point for transimpedance amplifier input stage. Use Value: 0.5 µA max reverse leakage prevents input offset drift >1 µV/°C, preserving sub-microvolt baseline stability over 8-hour clinical sessions. |
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 MMBZ5240BS | Single Zener (8.7 V, ±5 %), SOT23, no dual configuration | Requires two devices for dual-rail clamping; higher assembly cost and footprint | Select when only single-node regulation is needed and ±5 % tolerance is acceptable |
| Vishay BZX84-B9V1 | Same 9.1 V ±2 % rating but not AEC-Q101 qualified; 250 mW Ptot | Limited to industrial/commercial use; fails automotive thermal cycling and HTRB requirements | Select only for non-automotive designs where AEC-Q101 compliance is not mandated |
Compared with MMBZ5240BS and BZX84-B9V1, BZB84-B9V1-QR uniquely delivers dual-Zener functionality, AEC-Q101 qualification, and 300 mW power handling in one SOT23 footprint-making it the sole choice for space-constrained, automotive-grade bidirectional clamping.
Availability
BZB84-B9V1-QR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, infotainment power sequencing, and medical analog front-end designs requiring stable component supply with guaranteed long-term continuity.
Supply support for BZB84-B9V1-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 and logic devices for automotive, industrial, and consumer markets.
BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient protection in harsh automotive environments.
FAQ
What is the maximum continuous forward current rating for BZB84-B9V1-QR?
The absolute maximum forward current is 200 mA per diode, specified at Tamb ≤ 25 °C on standard FR4 PCB. Derating is required above 25 °C ambient per the 417 K/W junction-to-ambient thermal resistance; at 85 °C ambient, maximum usable forward current drops to approximately 120 mA to maintain Tj ≤ 150 °C.
Can BZB84-B9V1-QR be used for bidirectional ESD protection on differential data lines?
No-it is not rated for ESD per IEC 61000-4-2. While its 40 W non-repetitive surge capability handles slow transients like load dump, its clamping voltage under fast ESD events exceeds safe levels for USB or RS-485 receivers. Use dedicated ESD arrays (e.g., Nexperia PESD5V0S1BA) for that function.
How does the temperature coefficient affect regulation accuracy over automotive temperature range?
With a +3.8 mV/K coefficient at 5 mA, the Zener voltage increases by ~380 mV from −40 °C to +125 °C-a 4.2 % shift over 165 K. For applications needing tighter stability, pair with a negative-TC component or use closed-loop compensation; the datasheet provides SZ vs. IZ curves for precise modeling.
Is the common-anode configuration compatible with standard Zener biasing topologies?
Yes-connect CA to ground (or reference potential) and route K1/K2 to protected nodes. This implements classic cathode-up shunt regulation. For anode-up operation (e.g., high-side clamping), invert the device orientation and bias CA positively; the dual structure supports either configuration without circuit redesign.
BZB84-B9V1-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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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-B9V1-QR FAQ
1.How can I place an order for BZB84-B9V1-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B9V1-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-B9V1-QR reliable?
The price and inventory of BZB84-B9V1-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-B9V1-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B9V1-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B9V1-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B9V1-QR?
BZB84-B9V1-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B9V1-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-B9V1-QR?
For technical support, including BZB84-B9V1-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B9V1-QR requirements.
6.How does Aetrix verify that BZB84-B9V1-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B9V1-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-B9V1-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B9V1-QR?
All BZB84-B9V1-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B9V1-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-B9V1-QR part is unused and in its original packaging.
Return procedure for BZB84-B9V1-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B9V1-QR Tags
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