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Nexperia USA Inc. BZX384-A5V1-QX
- Part No.:
- BZX384-A5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A5V1-QX.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:276
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Product details
Overview
BZX384-A5V1-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision low-power voltage reference and clamping in automotive and industrial circuits. It delivers 5.1 V nominal breakdown voltage at 5 mA, with 2 μA reverse current at 1 V, 480 Ω differential resistance, and −2.7 mV/K temperature coefficient - enabling stable regulation in ECU power rails and sensor biasing networks.
For engineers reviewing the BZX384-A5V1-Q datasheet, BZX384-A5V1-Q pinout, BZX384-A5V1-Q application, or BZX384-A5V1-Q equivalent, this page provides verified Zener parameters, AEC-Q101 qualification status, thermal resistance data, and automotive-grade substitution guidance - all confirmed against Nexperia's official Rev. 1 product data sheet dated 6 September 2021.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 5.1 V reference by conducting reverse current above its specified Zener knee voltage. Its ±1 % tolerance and low 2 μA IR at VR = 1 V ensure tight regulation under light-load conditions typical in microcontroller reset circuits and analog front-end biasing.
Qualified to AEC-Q101, it supports junction temperatures from −65 °C to +150 °C and withstands non-repetitive 40 W surge pulses (tp = 100 μs), making it suitable for transient suppression in 12 V automotive subsystems where thermal reliability and surge immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.04 V to 5.16 V at IZ = 5 mA - defines precise clamping threshold for overvoltage protection in 5 V logic domains. |
| Differential Resistance (rdif) | 480 Ω max - determines regulation stiffness; lower values improve load regulation but increase sensitivity to current variation. |
| Reverse Current (IR) | 2 μA max at VR = 1 V - ensures minimal leakage in standby mode, critical for battery-powered sensor nodes. |
| Temperature Coefficient (SZ) | −2.7 mV/K at IZ = 5 mA - quantifies voltage drift with temperature; negative sign indicates decreasing VZ as Tj rises. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling without derating. |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables robust transient suppression of ISO 7637-2 pulse 1/2a surges in automotive ECUs. |
| Junction-to-Ambient Rth | 415 K/W - informs thermal design margin; requires careful PCB copper area planning for sustained 300 mW operation. |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-pin, cathode-marked with bar, 1.35 mm × 0.85 mm body, 0.45 mm lead pitch, 0.25 mm thickness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs; marked by bar on package top. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt path for excess current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per stress test standard - eliminates need for additional qualification in Tier-1 ECU designs. |
| ±1 % Zener tolerance | Enables direct replacement of higher-cost references in 5 V supply monitoring without calibration adjustment. |
| Low 2 μA reverse leakage | Minimizes quiescent current draw in always-on circuits such as CAN transceiver bias rails or RTC backup regulators. |
| 40 W surge capability | Withstands ISO 7637-2 Pulse 1 (−150 V, 50 Ω, 2 Ω series) without failure - reduces need for upstream TVS devices. |
| SOD323 footprint compatibility | Matches industry-standard 0805-equivalent land pattern - simplifies PCB layout reuse across Nexperia's BZX384-Q series. |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Monitoring 5 V supply rail in engine control unit to trigger brown-out reset when voltage drops below 4.75 V. IC Role / Device Role / Timing Role: Shunt regulator providing stable 5.1 V reference for comparator input in supervisor IC. Use Value: ±1 % tolerance ensures reset threshold accuracy within 25 mV, eliminating software calibration overhead. |
Use Scenario: Generating precise bias voltage for bridge-based pressure sensor in factory automation module. IC Role / Device Role / Timing Role: Low-drift Zener reference for ADC reference buffer amplifier input stage. Use Value: −2.7 mV/K tempco limits full-scale error to <0.1% over −40 °C to +125 °C operating range. |
| USB-C Port Overvoltage Clamp | IoT Node Battery Protection |
Use Scenario: Clamping VBUS line against 20 V transients during hot-plug events in USB-C peripheral design. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated above 5.6 V to divert surge energy before downstream LDO damage. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation, meeting USB-IF compliance. |
Use Scenario: Protecting lithium-thionyl chloride primary cell from overcharge during trickle-charging in remote telemetry node. IC Role / Device Role / Timing Role: Precision 5.1 V Zener limiting charging voltage across cell terminals via series resistor. Use Value: 2 μA reverse leakage at 1 V prevents measurable self-discharge over 10-year deployment life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B5V1-Q | ±2 % tolerance (5.00–5.20 V), 60 μA IR at 1 V, 400 Ω rdif | Higher leakage and looser tolerance reduce accuracy in precision biasing but lower cost. | Select when ±2 % regulation suffices and cost sensitivity outweighs drift performance. |
| MMSZ5231B-TP | ±5 % tolerance (4.85–5.36 V), 5.0 μA IR at 1 V, 17 Ω rdif, SOD-123 package | Lower dynamic impedance improves regulation under varying load but wider tolerance increases calibration burden. | Prefer for high-current shunt applications where low rdif matters more than absolute voltage accuracy. |
Compared with BZX384-B5V1-Q, the A-grade part offers tighter tolerance and lower leakage for precision sensing; compared with MMSZ5231B-TP, it trades lower rdif for superior automotive qualification and smaller SOD323 footprint - critical for space-constrained ECU modules.
Availability
BZX384-A5V1-Q is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial sensor bias reference, and USB-C port overvoltage clamping requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for BZX384-A5V1-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 automotive power rail stabilization, ESD protection, and precision voltage reference in harsh-temperature environments.
FAQ
What is the maximum continuous forward current for BZX384-A5V1-Q?
The device is not rated for continuous forward conduction; its absolute maximum forward current is 250 mA per IEC 60134 limiting values, but operation in forward bias is not intended. It functions exclusively as a reverse-biased Zener regulator, with forward voltage capped at 0.9 V at 10 mA per datasheet Table 1.
Can BZX384-A5V1-Q replace a 5.1 V TL431-based shunt regulator?
No - the TL431 is an active 2.5 V reference with adjustable output via external resistors and 100 mA sink capability; BZX384-A5V1-Q is a passive 5.1 V Zener with 250 mA absolute max reverse current and no gain or adjustability. It serves only fixed-voltage clamping, not programmable regulation.
Does the SOD323 package require special reflow profile considerations?
Yes - Nexperia specifies a reflow footprint with 0.5 mm solder lands and 0.6 mm solder resist opening per Fig. 12. Peak temperature must not exceed 260 °C for ≤10 s, and thermal ramp rate should stay within 3 °C/s to avoid package cracking or delamination due to its small 0.25 mm thickness.
How does the −2.7 mV/K temperature coefficient affect circuit accuracy over temperature?
At IZ = 5 mA, VZ decreases by 2.7 mV per Kelvin rise in junction temperature. Over a −40 °C to +125 °C ambient range (assuming 30 °C rise to Tj), total drift is ~−430 mV, resulting in ~8.4 % deviation from nominal 5.1 V - necessitating compensation in high-accuracy applications or selection of higher-VZ parts with positive tempcos.
BZX384-A5V1-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:
- ±1%
- 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-A5V1-QX FAQ
1.How can I place an order for BZX384-A5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A5V1-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-A5V1-QX reliable?
The price and inventory of BZX384-A5V1-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-A5V1-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A5V1-QX?
BZX384-A5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A5V1-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-A5V1-QX?
For technical support, including BZX384-A5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A5V1-QX requirements.
6.How does Aetrix verify that BZX384-A5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A5V1-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-A5V1-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A5V1-QX?
All BZX384-A5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A5V1-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-A5V1-QX part is unused and in its original packaging.
Return procedure for BZX384-A5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A5V1-QX Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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