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Nexperia USA Inc. BZX384-B5V1-QX
- Part No.:
- BZX384-B5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B5V1-QX.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
BZX384-B5V1-Q from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 5.1 V nominal breakdown at 5 mA, with 300 mW total power dissipation and AEC-Q101 qualification for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B5V1-Q datasheet, BZX384-B5V1-Q pinout, BZX384-B5V1-Q application, or BZX384-B5V1-Q equivalent, this device serves as a precision low-power shunt regulator in ECU power rails, sensor biasing networks, and ADC reference stabilization where stable 5.1 V clamping and thermal reliability across -65 °C to +150 °C are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 5.1 V reference across load variations, with differential resistance of 480 Ω max at 5 mA and temperature coefficient of −2.7 mV/K to +1.2 mV/K ensuring predictable drift under thermal stress.
It delivers non-repetitive peak reverse power handling up to 40 W for transient suppression, while its 110 K/W junction-to-solder-point thermal resistance enables reliable operation on FR4 PCBs with standard tin-plated copper footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 5.00 V to 5.20 V at IZ = 5 mA - defines precise clamping threshold for 5 V system rails |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets continuous DC regulation limit on standard FR4 PCB |
| Differential Resistance | ≤480 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse Current | ≤60 μA at VR = 1 V - ensures low leakage in standby or low-power modes |
| Temperature Coefficient | −2.7 mV/K to +1.2 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius |
| Junction Temperature | −65 °C to +150 °C - supports operation in under-hood automotive environments |
| Package | SOD323 (SC-76) - 2-pin surface-mount footprint with 1.35 mm × 0.85 mm body and cathode marking bar |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; cathode marked by a visible bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-side connection point for clamping |
| 2 | Anode (A) | Connected to ground or lower-potential rail; establishes reference return path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±2 % voltage tolerance | Enables tighter regulation than ±5 % variants, reducing margin requirements in 5 V supply monitoring |
| 40 W non-repetitive surge rating | Supports transient voltage suppression in CAN/LIN bus interfaces without external TVS |
| 150 °C maximum junction temperature | Permits placement near heat sources in engine control modules without derating |
| Low 60 μA IR at 1 V | Minimizes quiescent current draw in always-on vehicle subsystems like alarm controllers |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Biasing |
|---|---|
Use Scenario: Monitoring 5 V microcontroller supply rail in engine control units for undervoltage/overvoltage detection. IC Role / Device Role / Timing Role: Shunt regulator providing stable 5.1 V reference to comparator input for rail integrity checking. Use Value: Enables accurate ±2 % trip point setting without trimming resistors, reducing BOM count and calibration steps. |
Use Scenario: Providing bias voltage to analog pressure or temperature sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Low-drift Zener reference stabilizing excitation current source for ratiometric sensor outputs. Use Value: Maintains <1.2 mV/K drift over operating range, preserving sensor accuracy without active compensation. |
| ADC Reference Stabilization | USB-C Port Overvoltage Protection |
Use Scenario: Supplying reference voltage to 12-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Low-noise, low-leakage shunt regulator replacing higher-cost bandgap references in cost-sensitive designs. Use Value: Delivers 5.1 V reference with <60 μA leakage, extending battery life versus 3-terminal regulators. |
Use Scenario: Clamping VBUS line against surges during hot-plug events in automotive USB-C infotainment ports. IC Role / Device Role / Timing Role: Fast-response Zener absorbing 40 W transient energy before downstream PMIC damage occurs. Use Value: Eliminates need for separate TVS diode, saving board space and simplifying layout in tight connector zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A5V1-Q | ±1 % tolerance (vs. ±2 %), 480 Ω rdif max (same), 2.7 mV/K SZ min (tighter low-end drift) | Preferred where absolute 5.1 V accuracy is critical, e.g., precision ADC references | Select when tighter initial tolerance justifies higher unit cost and no AEC-Q101 requirement exists |
| BZX384-C5V1-Q | ±5 % tolerance (vs. ±2 %), 600 Ω rdif max (higher), 0.0 to 2.5 mV/K SZ (wider drift range) | Suitable for non-critical voltage clamping, e.g., LED current limiting or basic logic-level shifting | Choose for cost-sensitive consumer applications where 5.1 V ±5 % is acceptable |
Compared with BZX384-A5V1-Q, this part trades initial accuracy for broader automotive qualification and lower cost; versus BZX384-C5V1-Q, it delivers tighter regulation and lower thermal drift at modest premium, making it optimal for mid-tier automotive and industrial sensing.
Availability
BZX384-B5V1-Q is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor transmitters, ADC reference circuits, and USB-C overvoltage protection requiring stable component supply with AEC-Q101 compliance.
Supply support for BZX384-B5V1-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 efficient manufacturing.
The BZX384-Q series belongs to Nexperia's automotive Zener portfolio, engineered specifically for robust voltage regulation in harsh environments where AEC-Q101 compliance, thermal stability, and compact SMD packaging are mandatory.
FAQ
What is the maximum continuous forward current for BZX384-B5V1-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.
Can BZX384-B5V1-Q replace a 1N4733A in existing designs?
No - the 1N4733A is a 5.1 V, 1 W through-hole Zener in DO-41 package. BZX384-B5V1-Q has only 300 mW dissipation and SOD323 footprint; direct replacement requires thermal redesign and PCB rework to accommodate lower power and surface-mount geometry.
How does the −2.7 mV/K to +1.2 mV/K temperature coefficient impact circuit performance?
This range means the breakdown voltage may decrease by up to 2.7 mV per °C rise or increase by up to 1.2 mV per °C rise. At 100 °C ambient, worst-case drift is ±270 mV - critical for systems requiring stable 5.1 V over full temperature range, necessitating margin in comparator thresholds.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides validated reflow footprint (Fig. 12) and profile guidance. Peak temperature must not exceed 260 °C for ≤10 s, with ramp rates within JEDEC J-STD-020 limits; the 110 K/W junction-to-solder-point thermal resistance confirms compatibility with standard FR4 assembly processes.
BZX384-B5V1-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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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-B5V1-QX FAQ
1.How can I place an order for BZX384-B5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B5V1-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-B5V1-QX reliable?
The price and inventory of BZX384-B5V1-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-B5V1-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B5V1-QX?
BZX384-B5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B5V1-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-B5V1-QX?
For technical support, including BZX384-B5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B5V1-QX requirements.
6.How does Aetrix verify that BZX384-B5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B5V1-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-B5V1-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B5V1-QX?
All BZX384-B5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B5V1-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-B5V1-QX part is unused and in its original packaging.
Return procedure for BZX384-B5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B5V1-QX Tags
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