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Nexperia USA Inc. BZX384-B2V4-QX
- Part No.:
- BZX384-B2V4-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B2V4-QX.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,564
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Product details
Overview
BZX384-B2V4-Q from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 2.4 V nominal breakdown at 5 mA, with 300 mW total power dissipation and AEC-Q101 qualification for automotive load-dump protection and voltage reference circuits.
For engineers reviewing the BZX384-B2V4-Q datasheet, BZX384-B2V4-Q pinout, BZX384-B2V4-Q application, or BZX384-B2V4-Q equivalent, key selection criteria include its 2.35–2.45 V Zener voltage range at IZ = 5 mA, 600 Ω max differential resistance, ≤100 μA reverse current at 1 V, −3.5 to 0.0 mV/K temperature coefficient, and non-repetitive peak reverse power handling up to 40 W.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable output by conducting reverse current above its specified Zener voltage. Its low 2.4 V breakdown enables use in low-voltage logic supply clamping and battery monitoring circuits where headroom is constrained.
Designed for surface-mount reliability in harsh environments, it features qualified AEC-Q101 stress testing, junction-to-ambient thermal resistance of 415 K/W on FR4 PCB, and robust surge capability (40 W, 100 μs pulse) suitable for transient suppression in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.35 V to 2.45 V at IZ = 5 mA - defines precise regulation window for low-voltage reference stability |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous DC power handling on standard FR4 PCB |
| Differential Resistance (rdif) | ≤600 Ω - determines regulation stiffness and output impedance under varying load current |
| Reverse Current (IR) | ≤100 μA at VR = 1 V - ensures minimal leakage in standby or high-impedance bias networks |
| Temperature Coefficient (SZ) | −3.5 to 0.0 mV/K - quantifies Zener voltage drift over temperature for precision reference design |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient suppression of ISO 7637-2 Pulse 1/2a surges |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood automotive environments |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| ±2 % Zener tolerance | Tighter than ±5 % C-series, enabling higher accuracy in feedback loops without trimming |
| SOD323 footprint | Compact 1.35 mm × 0.85 mm outline with 0.95 mm lead pitch - supports high-density PCB layouts |
| 40 W surge rating | Withstands 100 μs transients up to 40 W - exceeds ISO 7637-2 Pulse 1 (inductive load dump) requirements |
| Low 2.4 V breakdown | Enables regulation in 3.3 V and 2.5 V system rails with sufficient margin for noise and tolerance stack-up |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Clamping microcontroller I/O pins against load-dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection by diverting surge current to ground when voltage exceeds 2.4 V. Use Value: Prevents latch-up or damage to 3.3 V logic inputs during ISO 7637-2 Pulse 1 events (−150 V, 50 ms) via fast Zener conduction. |
Use Scenario: Stabilizing reference voltage for analog-to-digital conversion of thermistor or RTD sensor outputs. IC Role / Device Role / Timing Role: Precision low-voltage Zener reference establishing fixed bias point for op-amp instrumentation amplifier gain setting. Use Value: Delivers <±2 % initial accuracy and <100 μA leakage, minimizing offset error and self-heating effects in millivolt-level measurements. |
| USB-C Power Delivery Monitoring | Smart Meter Voltage Supervisor |
|
Use Scenario: Monitoring VBUS line integrity in USB-C PD sink applications with tight 5 V ±5 % tolerance. IC Role / Device Role / Timing Role: Low-voltage Zener clamp detecting undervoltage faults below 2.4 V threshold during cable negotiation or fault conditions. Use Value: Enables fast response (<100 ns) to brown-out events with minimal quiescent current draw in always-on supervisor circuitry. |
Use Scenario: Providing fail-safe reset signal generation when main supply drops below critical level in utility meter SoCs. IC Role / Device Role / Timing Role: Voltage supervisor element triggering POR (power-on reset) circuit when 3.3 V rail falls below 2.4 V due to capacitor discharge or grid sag. Use Value: Guarantees deterministic reset assertion with −3.5 to 0.0 mV/K tempco, ensuring reliable operation across −40 °C to +85 °C meter operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A2V4-Q | ±1 % tolerance (2.37–2.43 V), lower rdif (600 Ω), same Ptot and surge rating | Higher precision required in metrology-grade references or closed-loop feedback | Select when tighter initial accuracy outweighs cost premium and board space is not constrained |
| MMSZ4678T1G | ±5 % tolerance (2.28–2.52 V), 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | General-purpose industrial or consumer electronics where automotive qualification is unnecessary | Choose for cost-sensitive non-automotive designs needing higher power but accepting wider voltage spread |
Compared with BZX384-A2V4-Q, this part trades 1 % accuracy for lower unit cost and identical surge robustness; versus MMSZ4678T1G, it delivers AEC-Q101 compliance and tighter tolerance in a smaller footprint, at the expense of 200 mW lower continuous power rating.
Availability
BZX384-B2V4-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery monitors, and smart meter voltage supervisors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX384-B2V4-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 AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in automotive electronics and mission-critical industrial systems.
FAQ
What is the maximum continuous forward current for BZX384-B2V4-Q?
The absolute maximum forward current is 250 mA per limiting values table. However, continuous forward conduction is not a typical operating mode - this device is designed for reverse-bias Zener regulation. Forward voltage is specified at 10 mA (≤0.9 V) and 100 mA (≤1.1 V), but sustained forward bias risks thermal overstress and is not recommended in regulation applications.
Can BZX384-B2V4-Q be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients below ~5 V, causing current hogging when paralleled. The BZX384-B2V4-Q has a −3.5 to 0.0 mV/K coefficient, meaning lower-voltage units will dominate conduction and overheat. For higher power, use a single higher-rated device or active regulation instead of parallel Zeners.
How does the marking code 'K1' correspond to BZX384-B2V4-Q?
'K1' is the top-side laser marking per Table 4, uniquely identifying the BZX384-B2V4-Q variant within the BZX384-Q family. It distinguishes this ±2 %, 2.4 V part from A-series (2B) and C-series (T3) variants, enabling automated optical inspection and traceability during SMT assembly and field service.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C using Rth(j-a) = 415 K/W. At 85 °C ambient, maximum allowable Ptot drops to approximately 145 mW ((150 °C − 85 °C) / 415 K/W). This derating ensures junction temperature remains ≤150 °C and maintains long-term reliability in under-hood or enclosed industrial enclosures.
BZX384-B2V4-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):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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-B2V4-QX FAQ
1.How can I place an order for BZX384-B2V4-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B2V4-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-B2V4-QX reliable?
The price and inventory of BZX384-B2V4-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-B2V4-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B2V4-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B2V4-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B2V4-QX?
BZX384-B2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B2V4-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-B2V4-QX?
For technical support, including BZX384-B2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B2V4-QX requirements.
6.How does Aetrix verify that BZX384-B2V4-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B2V4-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-B2V4-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B2V4-QX?
All BZX384-B2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B2V4-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-B2V4-QX part is unused and in its original packaging.
Return procedure for BZX384-B2V4-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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