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Nexperia USA Inc. BZX384-B3V0-QX
- Part No.:
- BZX384-B3V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B3V0-QX.pdf
- Description:
- DIODE ZENER 3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,921
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Product details
Overview
BZX384-B3V0-Q from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.0 V nominal breakdown at 5 mA, with 300 mW total power dissipation and AEC-Q101 qualification for automotive use. It provides stable reference voltage in low-power biasing, overvoltage protection, and voltage clamping circuits.
For engineers reviewing the BZX384-B3V0-Q datasheet, BZX384-B3V0-Q pinout, BZX384-B3V0-Q application, or BZX384-B3V0-Q equivalent, key selection criteria include its 3.0 V ±2 % Zener voltage tolerance, 95 Ω max differential resistance at 5 mA, 10 μA reverse current at 2.4 V, -3.5 to 0.0 mV/K temperature coefficient, and suitability for space-constrained automotive and industrial regulation functions.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its design targets precision low-current regulation with tight voltage tolerance and low thermal drift.
It features a non-repetitive peak reverse power dissipation of 40 W (100 μs pulse), junction-to-ambient thermal resistance of 415 K/W on FR4 PCB, and is qualified per AEC-Q101 for automotive-grade reliability. The cathode-anode polarity is marked by a bar on the SOD323 package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal at IZ = 5 mA; ±2 % tolerance ensures stable 2.94–3.06 V regulation in production designs |
| Differential Resistance (rdif) | ≤95 Ω at IZ = 5 mA; low impedance maintains voltage stability against small current variations |
| Reverse Current (IR) | ≤10 μA at VR = 2.4 V; minimal leakage preserves accuracy in high-impedance bias networks |
| Temperature Coefficient (SZ) | -3.5 to 0.0 mV/K at IZ = 5 mA; predictable drift enables compensation in temperature-sensitive references |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C; defines maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs; supports transient overvoltage clamping without failure |
| Junction Temperature (Tj) | 150 °C maximum; sets upper thermal limit for reliable operation in under-hood automotive environments |
Pinout & Package
The BZX384-B3V0-Q is housed in a miniature SOD323 (SC-76) surface-mount plastic package measuring 1.8 mm × 1.35 mm × 0.95 mm, with two gull-wing leads and a cathode-marking bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; accepts reverse bias for Zener conduction; marked by bar on package |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage reference generation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring extended temperature and reliability compliance |
| ±2 % Zener voltage tolerance | Enables tighter system-level voltage margining than ±5 % variants, reducing need for post-calibration trimming |
| Low differential resistance (≤95 Ω) | Minimizes output voltage shift under load changes, critical for precision analog reference and feedback paths |
| SOD323 footprint compatibility | Supports high-density PCB layouts with industry-standard 0.6 mm pad pitch and reflow/wave soldering profiles |
| 150 °C maximum junction temperature | Allows operation in under-dash and powertrain modules where ambient temperatures exceed 105 °C |
Applications
| Automotive ECU Reference | Industrial Sensor Biasing |
|---|---|
Use Scenario: Providing stable 3.0 V reference for microcontroller ADC inputs and op-amp comparators in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise analog reference point independent of supply rail fluctuations. Use Value: ±2 % tolerance and -3.5 to 0.0 mV/K temperature coefficient ensure <±15 mV total error over -40 °C to +125 °C, meeting ASIL-B sensor interface requirements. |
Use Scenario: Biasing bridge sensors and RTD front-ends in programmable logic controllers and process transmitters. IC Role / Device Role / Timing Role: Low-leakage (≤10 μA at 2.4 V) voltage clamp setting excitation current source headroom and reference node stability. Use Value: 95 Ω differential resistance minimizes gain error in ratiometric measurement systems when used with 10 kΩ sense resistors. |
| USB Port Overvoltage Protection | IoT Node Power Rail Clamping |
Use Scenario: Clamping 5 V USB VBUS line to safe levels during hot-plug transients or ESD events. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing surge energy before downstream LDOs or USB PHYs are stressed. Use Value: 40 W non-repetitive peak power rating handles 100 μs surges up to 13.3 V without degradation, satisfying IEC 61000-4-2 Level 4 immunity. |
Use Scenario: Regulating 3.3 V supply rail for BLE/Wi-Fi SoCs in battery-powered edge nodes subject to Li-ion voltage variation. IC Role / Device Role / Timing Role: Low-power (300 mW) shunt regulator maintaining stable 3.0 V reference for internal bandgap and brown-out detection. Use Value: 300 mW Ptot and 415 K/W Rth(j-a) allow continuous operation at 85 °C ambient without derating in sealed enclosures. |
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-B3V3-Q | 3.3 V nominal Zener voltage, same ±2 % tolerance and SOD323 package | Used where 3.3 V rail regulation or higher reference margin is required | Select when circuit requires 3.3 V instead of 3.0 V; identical thermal and surge performance |
| MMSZ4678T1G | 3.0 V Zener, ±5 % tolerance, SOD-123 package, 500 mW Ptot | Higher power handling but looser voltage tolerance and larger footprint | Choose for cost-sensitive industrial designs where ±5 % tolerance is acceptable and board space allows SOD-123 |
Compared with BZX384-B3V0-Q, BZX384-B3V3-Q offers identical automotive qualification and thermal behavior at a higher reference voltage, while MMSZ4678T1G trades tighter tolerance and smaller size for higher power and relaxed accuracy-making it suitable only where voltage margin or thermal headroom outweighs precision needs.
Availability
BZX384-B3V0-Q is available at Aetrix Electronics and suitable for automotive ECU reference, industrial sensor biasing, USB port overvoltage protection, and IoT node power rail clamping requiring stable component supply across production lifecycles.
Supply support for BZX384-B3V0-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for precision voltage reference and clamping in space-constrained, thermally demanding environments such as powertrain and ADAS subsystems.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-B3V0-Q has no specified maximum continuous reverse current; its steady-state operation is defined by power dissipation limits. At 3.0 V Zener voltage, the maximum continuous reverse current is approximately 100 mA (300 mW ÷ 3.0 V), assuming full derating above 25 °C ambient per its 415 K/W thermal resistance.
Is the cathode marking consistent across all BZX384-Q variants?
Yes-the cathode is always indicated by a bar on the SOD323 package body, and Pin 1 is consistently designated as the cathode terminal across the entire BZX384-Q series, including BZX384-B3V0-Q, as confirmed in Table 2 of the official Nexperia datasheet.
How does its temperature coefficient affect regulation accuracy over automotive temperature range?
With a temperature coefficient of -3.5 to 0.0 mV/K at 5 mA, the BZX384-B3V0-Q exhibits up to 52.5 mV drift from -40 °C to +125 °C (165 K × 0.318 mV/K avg). Combined with ±2 % initial tolerance (±60 mV), total worst-case error remains within ±113 mV-well within typical 3.0 V reference system budgets.
Can this diode be used in parallel for higher power handling?
No-Zener diodes must not be paralleled due to mismatched breakdown voltages causing current hogging and thermal runaway. For higher power, use a single higher-rated device like the PZM3.0NH or implement active regulation; the BZX384-B3V0-Q is strictly a low-power (300 mW) solution.
BZX384-B3V0-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):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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-B3V0-QX FAQ
1.How can I place an order for BZX384-B3V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B3V0-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-B3V0-QX reliable?
The price and inventory of BZX384-B3V0-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-B3V0-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B3V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B3V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B3V0-QX?
BZX384-B3V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B3V0-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-B3V0-QX?
For technical support, including BZX384-B3V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B3V0-QX requirements.
6.How does Aetrix verify that BZX384-B3V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B3V0-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-B3V0-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B3V0-QX?
All BZX384-B3V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B3V0-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-B3V0-QX part is unused and in its original packaging.
Return procedure for BZX384-B3V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B3V0-QX Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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