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Nexperia USA Inc. BZX384-C9V1-QX
- Part No.:
- BZX384-C9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C9V1-QX.pdf
- Description:
- DIODE ZENER 9.05V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,154
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Product details
Overview
BZX384-C9V1-Q from Nexperia is a ±5 % 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-C9V1-Q datasheet, BZX384-C9V1-Q pinout, BZX384-C9V1-Q application, or BZX384-C9V1-Q equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse current limits, and automotive-grade reliability data required for precision biasing, ESD clamping, and supply rail stabilization in harsh-environment designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener voltage (9.1 V ±5 % at IZ = 5 mA). Its low 100 Ω typical differential resistance ensures minimal voltage drift under dynamic current changes.
Designed for automotive use, it features AEC-Q101 qualification, 150 °C maximum junction temperature, and non-repetitive peak reverse power dissipation of 40 W (100 μs pulse), enabling robust transient suppression in 12 V and 24 V vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5 % at IZ = 5 mA - defines precise regulation threshold for reference or clamp function |
| Differential Resistance (rdif) | 100 Ω max - limits output voltage variation under ±1 mA load current change |
| Reverse Current (IR) | 0.5 μA max at VR = 7.2 V - ensures low leakage in standby or high-impedance bias networks |
| Temperature Coefficient (SZ) | +3.8 mV/K to +7.0 mV/K - quantifies positive VZ drift with junction temperature rise |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous DC power limit for thermal design |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 μs - supports surge immunity in ISO 7637-2 pulse 1/2a/5a automotive transients |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood and powertrain control units |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-pin, cathode-marked with bar, 1.35 mm × 0.85 mm body, 0.45 mm pitch, 0.25 mm thickness - optimized for high-density automotive PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| ±5 % Zener tolerance (C-series) | Cost-optimized regulation accuracy suitable for non-critical biasing and clamping functions |
| Low thermal resistance (Rth(j-sp) = 110 K/W) | Enables efficient heat transfer from junction to solder point on standard FR4 PCB |
| Non-repetitive 40 W surge rating | Withstands automotive load-dump and inductive-switching transients without degradation |
| 150 °C maximum junction temperature | Supports reliable operation in high-ambient environments such as power distribution modules |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V reference for LIN bus transceivers and door module microcontrollers. IC Role / Device Role / Timing Role: Shunt voltage reference providing low-drift bias for analog comparators and ADC references. Use Value: Maintains <±2 % output stability across −40 °C to +125 °C ambient, meeting ISO 16750-2 requirements. |
Use Scenario: Clamping 24 V supply rail against switching noise in pressure sensor front-ends. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursions to ≤10 V during relay coil de-energization. Use Value: Absorbs 40 W surges (100 μs) without failure, preventing op-amp input damage in analog signal chains. |
| Consumer Power Adapter Feedback | Medical Infusion Pump Power Monitoring |
Use Scenario: Providing feedback voltage to optocoupler-based secondary-side regulation in AC/DC adapters. IC Role / Device Role / Timing Role: Precision Zener reference setting error amplifier trip point in isolated flyback controllers. Use Value: 9.1 V ±5 % tolerance ensures consistent output voltage regulation within ±3 % across production batches. |
Use Scenario: Monitoring battery voltage thresholds in portable infusion pumps using discrete comparator circuits. IC Role / Device Role / Timing Role: Stable voltage reference enabling accurate 7.2 V low-battery detection with <10 mV hysteresis. Use Value: Low 0.5 μA reverse leakage at 7.2 V minimizes quiescent current drain in battery-powered standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B9V1-Q | ±2 % tolerance (vs. ±5 %), 80 Ω max rdif, higher cost | Better regulation stability for precision analog references | Select when tighter voltage accuracy and lower dynamic impedance are required |
| MMSZ4702T1G | 9.1 V ±5 %, SOD-123 package, 500 mW Ptot, no AEC-Q101 | Larger footprint, higher power, non-automotive qualified | Use only in industrial or consumer applications where AEC-Q101 is not mandated |
Compared with BZX384-B9V1-Q, this part trades regulation accuracy for cost and size; compared with MMSZ4702T1G, it offers automotive qualification and smaller SOD323 footprint but lower power handling - making it optimal for space-constrained, AEC-compliant 12 V subsystems.
Availability
BZX384-C9V1-Q is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback loops, and medical portable device monitoring requiring stable component supply and long-term lifecycle support.
Supply support for BZX384-C9V1-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 logic, discrete, and MOSFET devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX384-Q series belongs to Nexperia's automotive Zener diode product line, engineered specifically for voltage reference, overvoltage protection, and biasing in harsh-environment electronic control units.
FAQ
What is the guaranteed Zener voltage range for BZX384-C9V1-Q at 5 mA?
The guaranteed Zener voltage is 8.5 V to 9.6 V at IZ = 5 mA and Tj = 25 °C, reflecting its ±5 % tolerance specification. This range remains valid across the full operating junction temperature span (−65 °C to +150 °C), with temperature coefficient values documented in the datasheet for derating calculations.
Can BZX384-C9V1-Q be used in parallel for higher power dissipation?
No - Zener diodes must not be paralleled due to mismatched breakdown voltages causing current hogging and thermal runaway. For higher power needs, select a single higher-rated device like BZX84-C9V1 or implement active regulation with a transistor-based shunt circuit.
Is the SOD323 package compatible with standard reflow profiles?
Yes - the SOD323 package is qualified for lead-free reflow soldering per J-STD-020. Recommended peak temperature is 260 °C for ≤30 seconds, with preheat ramp rate ≤3 °C/s and cooling rate ≤6 °C/s. The footprint dimensions in Figure 12 of the datasheet ensure reliable joint formation.
How does the temperature coefficient affect regulation in automotive under-hood applications?
At +3.8 to +7.0 mV/K, VZ increases ~0.5 V over a 100 °C junction rise (e.g., from 25 °C to 125 °C), which must be accounted for in reference-critical circuits. For stable biasing, pair with a complementary NTC thermistor or use in closed-loop feedback where drift is compensated.
BZX384-C9V1-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):
- 9.05 V
- Tolerance:
- ±5%
- 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-C9V1-QX FAQ
1.How can I place an order for BZX384-C9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C9V1-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-C9V1-QX reliable?
The price and inventory of BZX384-C9V1-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-C9V1-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C9V1-QX?
BZX384-C9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C9V1-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-C9V1-QX?
For technical support, including BZX384-C9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C9V1-QX requirements.
6.How does Aetrix verify that BZX384-C9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C9V1-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-C9V1-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C9V1-QX?
All BZX384-C9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C9V1-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-C9V1-QX part is unused and in its original packaging.
Return procedure for BZX384-C9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C9V1-QX Tags
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