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Nexperia USA Inc. BZX384-C30-QX
- Part No.:
- BZX384-C30-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C30-QX.pdf
- Description:
- DIODE ZENER 30V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,916
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Product details
Overview
BZX384-C30-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 30 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power biasing, overvoltage protection, and voltage clamping circuits.
For engineers reviewing the BZX384-C30-Q datasheet, BZX384-C30-Q pinout, BZX384-C30-Q application, or BZX384-C30-Q equivalent, key selection criteria include its 30 V Zener voltage tolerance (±5 %), non-repetitive peak reverse power capability of 40 W, thermal resistance of 415 K/W (junction-to-ambient), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device operates in reverse-bias breakdown mode with a specified Zener voltage of 28.0 V to 32.0 V at IZ = 2 mA. Its differential resistance is ≤300 Ω at IZ = 2 mA, and temperature coefficient is +0.05 mV/K - indicating minimal drift across operating temperature.
The diode supports surge handling up to 1.0 A non-repetitive peak reverse current (tp = 100 μs), and maintains reverse leakage <80 μA at VR = 22.8 V. It is designed for surface-mount operation on FR4 PCBs with standard SOD323 footprint and tin-plated copper layers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.0 V to 32.0 V at IZ = 2 mA - defines precise clamping threshold for 30 V nominal regulation |
| Tolerance | Approximately ±5 % - enables cost-effective voltage referencing where tight regulation is not critical |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W - supports transient overvoltage suppression (e.g., load dump, ESD) |
| Reverse Current (IR) | <80 μA at VR = 22.8 V - ensures low standby leakage in bias networks |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H); cathode tab solder point thermal resistance Rth(j-sp) = 110 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark (bar) on package identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - meets stress test requirements for automotive electronics deployment |
| Surge robustness | 40 W non-repetitive peak reverse power (100 μs pulse) - handles ISO 7637-2 load-dump transients |
| Thermal performance | Rth(j-a) = 415 K/W - enables stable regulation without heatsinking in compact layouts |
| Low-leakage operation | <80 μA IR at 75 % of VZ - minimizes quiescent current in battery-powered bias networks |
| Standardized footprint | SOD323 outline per JEDEC MO-213AA - ensures compatibility with automated pick-and-place and reflow processes |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to analog pressure/temperature sensors in engine control units. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, maintaining constant bias despite battery voltage fluctuations (9–16 V). Use Value: Enables sensor output linearity within ±0.5 % error band over −40 °C to +125 °C ambient range. |
Use Scenario: Generating fixed 30 V reference for feedback loop in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Shunt regulator establishes precision voltage node for optocoupler input or TL431 comparator reference. Use Value: Maintains output regulation accuracy within ±2 % across 10–100 % load step due to low dynamic impedance (≤300 Ω). |
| Consumer Device Overvoltage Clamp | Telecom Line Interface Protection |
|
Use Scenario: Clamping USB VBUS line against 33 V surges during hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-acting Zener shunts excess energy to ground before downstream LDO or USB controller sustains damage. Use Value: Limits clamped voltage to ≤32 V with 1.0 A peak surge current capability, meeting IEC 61000-4-5 Level 3 immunity. |
Use Scenario: Protecting RS-485 transceiver inputs from induced lightning surges on outdoor data lines. IC Role / Device Role / Timing Role: Paired with series current-limiting resistor to absorb transient energy while preserving signal integrity. Use Value: Withstands 40 W surge pulses without parametric shift, verified per AEC-Q101 transient overload test conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B30-Q | ±2 % tolerance (29.4 V–30.6 V), lower rdif (≤150 Ω), higher cost | Better regulation stability in precision feedback loops; tighter VZ distribution improves batch yield | Select when ±2 % tolerance is required for closed-loop accuracy, and cost premium is acceptable |
| MMSZ5256ET1G | ±5 % tolerance (28.5 V–31.5 V), SOD-123 package, 500 mW Ptot, no AEC-Q101 | Higher power rating but larger footprint; lacks automotive qualification and surge rating consistency | Use only in non-automotive industrial designs where board space allows SOD-123 and AEC compliance is unnecessary |
Compared with BZX384-B30-Q, the BZX384-C30-Q trades tighter voltage control for lower unit cost and identical AEC-Q101 qualification; versus MMSZ5256ET1G, it offers proven automotive reliability and standardized surge performance at the expense of power headroom.
Availability
BZX384-C30-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply reference, and consumer overvoltage clamp applications requiring stable component supply, AEC-Q101 traceability, and consistent surge performance.
Supply support for BZX384-C30-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 essential semiconductors for automotive, industrial, and consumer markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage reference and transient protection in harsh environments such as engine compartments and industrial control cabinets.
FAQ
What is the maximum continuous forward current for BZX384-C30-Q?
The device is not intended for continuous forward conduction. Its absolute maximum forward current is 250 mA per limiting values table, but typical operation occurs in reverse-bias Zener mode. Forward voltage is 0.9 V at 10 mA pulse (tp ≤ 100 μs), and sustained forward bias risks thermal runaway due to lack of thermal shutdown.
Can BZX384-C30-Q replace BZX384-A30-Q in an existing design?
Yes, but with trade-offs: BZX384-C30-Q has wider tolerance (±5 % vs. ±1 %), resulting in VZ range of 28.0–32.0 V versus 29.7–30.3 V. This may affect regulation accuracy in precision feedback paths, though it retains identical package, surge rating, and AEC-Q101 qualification.
What is the recommended PCB layout for thermal management?
Mount on FR4 with single-sided 1 oz copper, using the standard SOD323 footprint per Figure 12. Maximize copper area connected to cathode pad to leverage Rth(j-sp) = 110 K/W; avoid thermal reliefs on cathode land. Keep ambient temperature below 25 °C for full 300 mW rating.
Does BZX384-C30-Q support wave soldering?
Yes - Nexperia provides dedicated wave soldering footprint (Figure 13) with 2.75 mm transport direction clearance and 1.2 mm solder land width. Preheat to 100–120 °C, peak temperature ≤260 °C, and contact time ≤5 s to avoid package delamination or marking degradation.
BZX384-C30-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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-C30-QX FAQ
1.How can I place an order for BZX384-C30-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C30-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-C30-QX reliable?
The price and inventory of BZX384-C30-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-C30-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C30-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C30-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C30-QX?
BZX384-C30-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C30-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-C30-QX?
For technical support, including BZX384-C30-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C30-QX requirements.
6.How does Aetrix verify that BZX384-C30-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C30-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-C30-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C30-QX?
All BZX384-C30-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C30-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-C30-QX part is unused and in its original packaging.
Return procedure for BZX384-C30-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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