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Nexperia USA Inc. BZX384-A9V1-QX
- Part No.:
- BZX384-A9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,936
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Product details
Overview
BZX384-A9V1-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 9.1 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-A9V1-Q datasheet, BZX384-A9V1-Q pinout, BZX384-A9V1-Q application, or BZX384-A9V1-Q equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight voltage tolerance and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified 9.1 V nominal Zener voltage (VZ) at IZ = 5 mA, differential resistance of ≤100 Ω, and temperature coefficient of +3.8 mV/K - indicating positive thermal drift optimized for stable regulation across -65 °C to +150 °C ambient range.
It delivers non-repetitive peak reverse power dissipation up to 40 W for surge suppression, supports forward current up to 250 mA, and exhibits reverse leakage current ≤0.5 μA at VR = 7.3 V, enabling use in low-quiescent-current monitoring and clamping functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.00 V to 9.20 V at IZ = 5 mA - ensures ±1 % regulation accuracy for precision reference applications |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance (rdiff) | ≤100 Ω - determines output impedance and load regulation sensitivity in shunt configuration |
| Reverse Current (IR) | ≤0.5 μA at VR = 7.3 V - enables low-leakage voltage sensing and battery-backed circuitry |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient overvoltage clamping without failure |
| Junction Temperature (Tj) | 150 °C maximum - allows operation in under-hood automotive environments |
| Thermal Resistance (Rth(j-a)) | 415 K/W - quantifies self-heating impact on voltage stability during sustained conduction |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body size, and cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units and ADAS sensors |
| ±1 % VZ tolerance | Enables high-accuracy voltage references without external trimming in production systems |
| Low differential resistance (≤100 Ω) | Minimizes output voltage variation under load changes in feedback or bias networks |
| 150 °C max junction temperature | Supports placement near heat sources in compact automotive PCB layouts |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land pattern for automated assembly |
Applications
| Engine Control Unit (ECU) Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 9.1 V reference for analog front-end comparators in diesel ECU power management. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise threshold for overvoltage detection logic. Use Value: ±1 % tolerance ensures consistent trip point across temperature and unit-to-unit variation, reducing calibration overhead. |
Use Scenario: Biasing thermistor-based cabin temperature sensors in HVAC control modules. IC Role / Device Role / Timing Role: Precision Zener reference setting excitation voltage for ratiometric measurement bridges. Use Value: Low 0.5 μA leakage at 7.3 V prevents signal offset errors in high-impedance sensor interfaces. |
| ADC Voltage Reference Stabilization | Overvoltage Clamp in CAN Transceiver Supply |
Use Scenario: Stabilizing internal reference for 12-bit automotive-grade ADCs sampling battery voltage. IC Role / Device Role / Timing Role: Low-noise shunt regulator filtering supply ripple before ADC reference input. Use Value: 100 Ω differential resistance limits reference voltage shift to <1 mV per 0.1 mA load change. |
Use Scenario: Clamping 12 V supply rail feeding ISO 11898-2 CAN transceivers against load dump transients. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing 40 W surges for 100 μs without degradation. Use Value: 40 W non-repetitive peak power rating meets ISO 7637-2 Pulse 5a requirements when combined with series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B9V1-Q | ±2 % VZ tolerance (9.0–9.4 V), higher max IR (1 μA at 7.3 V) | Acceptable where tighter regulation not required; lower cost for non-critical biasing | Select for cost-sensitive industrial controls where ±2 % is sufficient |
| MMSZ4709T1G | 9.1 V nominal, ±5 % tolerance, 500 mW Ptot, SOD-123 package | Larger footprint and higher power; less suitable for space-constrained automotive PCBs | Choose only if higher power margin or legacy SOD-123 layout compatibility is mandatory |
Compared with BZX384-B9V1-Q, the A-grade offers 2× tighter tolerance critical for reference accuracy; versus MMSZ4709T1G, it trades 200 mW power headroom for 30 % smaller board area and AEC-Q101 compliance essential for automotive deployment.
Availability
BZX384-A9V1-Q is available at Aetrix Electronics and suitable for automotive ECUs, sensor signal conditioning, ADC reference stabilization, and CAN bus power rail protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-A9V1-Q 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 technologies.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous reverse current this diode can sustain?
The BZX384-A9V1-Q has no defined maximum continuous reverse current rating; its safe operating limit is governed by power dissipation. At 9.1 V, continuous Zener current must be limited to ≤33 mA to stay within the 300 mW Ptot rating at 25 °C ambient, derating linearly above that temperature per the 415 K/W thermal resistance.
How does the +3.8 mV/K temperature coefficient affect regulation accuracy over temperature?
The +3.8 mV/K coefficient means VZ increases by approximately 0.34 V over a 90 °C rise (e.g., from 25 °C to 115 °C). This drift is predictable and stable, allowing system-level compensation in closed-loop designs or acceptable for applications where absolute accuracy is secondary to monotonic behavior.
Can this diode be used in parallel for higher power handling?
No - Zener diodes exhibit negative resistance characteristics and cannot be reliably paralleled due to mismatched VZ and thermal runaway risk. For higher power, use a single higher-rated device or implement active regulation with a pass transistor instead of paralleling BZX384-A9V1-Q units.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies a JEDEC-compliant reflow profile for SOD323, with peak temperature ≤260 °C and time above liquidus ≤60 seconds. The recommended footprint (Fig. 12) uses 0.5 mm wide solder lands and 0.6 mm solder resist openings to ensure reliable wetting and mechanical strength without tombstoning.
BZX384-A9V1-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A9V1-QX FAQ
1.How can I place an order for BZX384-A9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A9V1-QX 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 BZX384-A9V1-QX reliable?
The price and inventory of BZX384-A9V1-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A9V1-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A9V1-QX?
BZX384-A9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A9V1-QX 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 BZX384-A9V1-QX?
For technical support, including BZX384-A9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A9V1-QX requirements.
6.How does Aetrix verify that BZX384-A9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A9V1-QX 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 BZX384-A9V1-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A9V1-QX?
All BZX384-A9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A9V1-QX, 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 BZX384-A9V1-QX part is unused and in its original packaging.
Return procedure for BZX384-A9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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