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Nexperia USA Inc. BZX384-C4V7-QX
- Part No.:
- BZX384-C4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C4V7-QX.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,619
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Product details
Overview
BZX384-C4V7-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.4 V to 5.0 V nominal breakdown at 5 mA, with 300 mW total power dissipation and AEC-Q101 qualification for automotive load-dump protection and board-level voltage clamping.
For engineers reviewing the BZX384-C4V7-Q datasheet, BZX384-C4V7-Q pinout, BZX384-C4V7-Q application, or BZX384-C4V7-Q equivalent, this page delivers verified Zener voltage, differential resistance, reverse leakage, temperature coefficient, and thermal resistance data required for precision analog reference design, ESD-coupled rail clamping, and low-power voltage stabilization in space-constrained automotive ECUs.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-biased conduction above its specified Zener voltage (VZ = 4.4–5.0 V at IZ = 5 mA), with low dynamic impedance (rdif ≤ 500 Ω) and minimal temperature drift (SZ = −3.5 to +0.2 mV/K).
It supports transient suppression via non-repetitive peak reverse power dissipation of 40 W (tp = 100 μs), while sustaining continuous operation up to 150 °C junction temperature and meeting AEC-Q101 stress-test requirements for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4 V to 5.0 V at IZ = 5 mA - defines precise clamping threshold for 5 V rail stabilization |
| Differential Resistance (rdif) | ≤500 Ω - ensures minimal output voltage variation under changing load current |
| Reverse Current (IR) | ≤3 μA at VR = 3.0 V - guarantees low standby power loss in high-impedance bias networks |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Thermal Resistance (Rth(j-a)) | 415 K/W - determines junction-to-ambient temperature rise under steady-state bias |
| Non-repetitive Peak Power (PZSM) | 40 W (tp = 100 μs) - enables robust surge immunity against ISO 7637-2 pulse 1/2a/5a transients |
| Temperature Coefficient (SZ) | −3.5 to +0.2 mV/K - quantifies VZ drift across −65 °C to +150 °C operating range |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.35 mm × 1.75 mm footprint, 0.45 mm height, 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 reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules |
| ±5 % VZ tolerance | Cost-optimized regulation accuracy suitable for non-critical biasing and overvoltage clamping |
| Low rdif (≤500 Ω) | Maintains tight voltage regulation under varying load currents without external feedback |
| 40 W surge rating | Withstands automotive load-dump and inductive switching transients without degradation |
| SOD323 footprint | Enables high-density PCB layout in space-constrained modules such as CAN transceiver interfaces and LIN bus nodes |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 5 V supply rail against load-dump transients in door module microcontroller power domain. IC Role / Device Role: Shunt Zener regulator providing passive overvoltage protection upstream of LDO. Use Value: Limits rail excursion to ≤5.0 V during ISO 7637-2 Pulse 5a (75 V/400 ms), preventing MCU brownout or latch-up. |
Use Scenario: Establishing stable 4.7 V reference for 12-bit ADC input scaling in temperature transmitter. IC Role / Device Role: Precision Zener voltage source for ratiometric sensor excitation and offset calibration. Use Value: Delivers <±10 mV stability over −40 °C to +85 °C due to low SZ and matched rdif. |
| USB-C Power Delivery Interface | Smart Lighting Driver Feedback Loop |
Use Scenario: Protecting CC line ESD protection diodes from VBUS coupling during hot-plug events. IC Role / Device Role: Secondary clamp limiting voltage between CC and GND to prevent damage to USB PD controller. Use Value: Activates at 4.7 V before internal 5.5 V absolute maximum rating of controller I/O pins is exceeded. |
Use Scenario: Setting current-sense threshold in constant-current LED driver using shunt-based feedback. IC Role / Device Role: Zener reference defining upper bound of sense voltage for comparator trip point. Use Value: Enables accurate 350 mA ±2% LED current setting with <0.5 % drift over 10,000-hour lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7-Q | ±2 % VZ tolerance (4.61–4.79 V), lower rdif (≤400 Ω) | Better regulation accuracy for precision biasing; higher cost | Select when tighter VZ tolerance and lower dynamic impedance are required for analog references |
| MMSZ4700T1G | ±5 % VZ, SOD-123 package, 500 mW Ptot, Rth(j-a) = 350 K/W | Larger footprint, higher power handling, less thermal resistance | Choose for higher ambient temperature environments (>105 °C) where SOD323 thermal limits are exceeded |
Compared with BZX384-C4V7-Q, the BZX384-B4V7-Q improves voltage accuracy and regulation stiffness at the expense of cost and AEC-Q101 margin, while MMSZ4700T1G trades miniaturization for enhanced thermal performance and legacy footprint compatibility.
Availability
BZX384-C4V7-Q is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, USB-C protection circuits, and smart lighting systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-C4V7-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 energy-efficient solutions.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum continuous forward current for BZX384-C4V7-Q?
The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener operation. Absolute maximum forward current is 250 mA per limiting values table, but sustained forward bias exceeds design intent and risks thermal runaway or parameter shift. Forward voltage is specified only for test conditions (VF ≤ 0.9 V at IF = 10 mA pulse).
Can BZX384-C4V7-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients below ~5 V, causing current hogging and thermal instability when paralleled. The BZX384-C4V7-Q's −3.5 to +0.2 mV/K coefficient means mismatched units will not share current evenly, risking premature failure of one device. Use a single higher-power Zener or active regulation instead.
How does the ±5 % tolerance affect circuit performance in a 5 V rail clamp?
At 5 mA test current, the actual VZ spans 4.4–5.0 V, meaning worst-case clamping occurs at 4.4 V - potentially triggering false undervoltage detection in downstream ICs expecting ≥4.5 V. Designers must verify system behavior at both extremes and may need margin adjustment in supervisor thresholds or LDO enable points.
Is the SOD323 package compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOD323 outline supports peak temperatures up to 260 °C for ≤30 seconds, with recommended solder paste stencil apertures of 0.5 mm × 0.6 mm per pad and 1.5 mm land length, as documented in Figure 12 of the datasheet.
BZX384-C4V7-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-C4V7-QX FAQ
1.How can I place an order for BZX384-C4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C4V7-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-C4V7-QX reliable?
The price and inventory of BZX384-C4V7-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-C4V7-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C4V7-QX?
BZX384-C4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C4V7-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-C4V7-QX?
For technical support, including BZX384-C4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C4V7-QX requirements.
6.How does Aetrix verify that BZX384-C4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C4V7-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-C4V7-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C4V7-QX?
All BZX384-C4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C4V7-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-C4V7-QX part is unused and in its original packaging.
Return procedure for BZX384-C4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C4V7-QX Tags
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