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NXP Semiconductors BZX384-C3V3/ZLX
- Part No.:
- BZX384-C3V3/ZLX
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C3V3/ZLX.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
BZX384-C3V3/ZLX from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.3 V nominal breakdown at 5 mA, with 600 Ω max differential resistance and ≤300 mW total power dissipation. It provides stable low-voltage reference and overvoltage protection in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX384-C3V3/ZLX datasheet, BZX384-C3V3/ZLX pinout, BZX384-C3V3/ZLX application, or BZX384-C3V3/ZLX equivalent, key selection criteria include its 3.3 V ±5 % Zener voltage tolerance, 600 Ω dynamic impedance at 5 mA, 5 μA max reverse current at 1 V, thermal resistance of 415 K/W (junction-to-ambient), and SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
The BZX384-C3V3/ZLX operates as a silicon planar Zener diode optimized for low-power voltage regulation and clamping. Its breakdown mechanism is predominantly Zener-dominated below 5.6 V, resulting in a negative temperature coefficient of −3.5 mV/K at 5 mA, enabling predictable drift behavior in ambient temperature ranges from −65 °C to +150 °C.
It supports transient suppression via non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), with maximum forward current of 250 mA and junction temperature limit of 150 °C. The device is mounted on FR4 PCB with single-sided copper and standard SOD323 footprint per Nexperia's recommended land pattern.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.10 V to 3.50 V at IZ = 5 mA - defines regulation window for 3.3 V nominal rail stabilization |
| Differential Resistance (rdif) | ≤600 Ω at IZ = 5 mA - limits output voltage variation under load current changes |
| Reverse Current (IR) | ≤5 μA at VR = 1 V - ensures minimal leakage in standby or sensing circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power handling on standard FR4 PCB |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 415 K/W - determines temperature rise above ambient under steady-state bias |
| Non-Repetitive Peak Reverse Current (IZSM) | 6.0 A at tp = 100 μs - enables short-duration surge clamping without failure |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-terminal, 1.35 mm × 0.85 mm body, 0.45 mm nominal height, cathode marked by bar on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; polarity marker aligns with PCB silkscreen bar |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective regulation where tight voltage accuracy is not required, e.g., non-critical biasing or coarse reference |
| Low dynamic impedance (≤600 Ω) | Maintains stable output voltage across moderate load variations in 3.3 V supply monitoring paths |
| 40 W non-repetitive peak power rating | Provides robust ESD and transient immunity in I/O protection circuits without external TVS staging |
| SOD323 footprint compatibility | Supports automated placement and reflow in high-volume manufacturing with industry-standard land patterns |
Applications
| Power Supply Monitoring | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Monitoring 3.3 V system rail for brown-out detection prior to MCU reset assertion. IC Role / Device Role / Timing Role: Zener reference element providing stable threshold voltage to comparator input. Use Value: 3.3 V ±5 % breakdown enables reliable trip point alignment with 3.3 V logic supply tolerances without trimming. |
Use Scenario: Generating clean, noise-immune reset signal during power-up and voltage sag events. IC Role / Device Role / Timing Role: Clamping diode in RC-based reset generator to fix upper voltage bound. Use Value: 600 Ω rdif minimizes voltage droop during capacitor discharge, ensuring monotonic reset timing. |
| ESD Protection for Analog Sensors | Reference Voltage for ADC Biasing |
Use Scenario: Protecting low-voltage analog sensor outputs (e.g., 3.3 V I²C lines) against human-body-model ESD. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) shunt clamp limiting voltage excursion to ≤3.5 V. Use Value: 40 W peak power rating absorbs 8 kV HBM surges without degradation, preserving signal integrity. |
Use Scenario: Providing stable 3.3 V reference for 12-bit SAR ADC reference input in portable instrumentation. IC Role / Device Role / Timing Role: Passive voltage reference source with predictable temperature drift (−3.5 mV/K). Use Value: Negative TC allows compensation when paired with positive-TC components in precision divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V3 | ±2 % tolerance (2.94 V–3.06 V vs. 3.10 V–3.50 V); 95 Ω max rdif | Narrower regulation band suits precision biasing where tighter voltage control is needed | Select when <±2 % VZ stability is required and higher cost is acceptable |
| MMBZ5226BS | Same 3.3 V nominal, SOT-23 package, 150 mW Ptot, 25 Ω rdif | Larger footprint and lower power rating limit use in high-surge or high-density layouts | Choose only if SOT-23 is mandated and 150 mW dissipation suffices |
Compared with BZX384-C3V3/ZLX, BZX384-B3V3 offers tighter regulation at higher cost and lower surge margin, while MMBZ5226BS trades package size and power handling for improved impedance-making BZX384-C3V3/ZLX optimal for cost-sensitive, space-constrained 3.3 V clamping where ±5 % tolerance is acceptable.
Availability
BZX384-C3V3/ZLX is available at Aetrix Electronics and suitable for power supply monitoring, microcontroller reset generation, ESD protection, and ADC reference applications requiring stable component supply and long-term obsolescence management.
Supply support for BZX384-C3V3/ZLX 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, industrial, and mobile power management solutions.
The BZX384 series is designed for general-purpose voltage regulation and clamping in consumer, computing, and industrial electronics, emphasizing small-footprint reliability and broad E24 voltage coverage from 2.4 V to 75 V.
FAQ
What is the Zener voltage tolerance of BZX384-C3V3/ZLX?
The BZX384-C3V3/ZLX has a nominal Zener voltage of 3.3 V with a tolerance of approximately ±5 %, meaning its actual breakdown voltage falls between 3.10 V and 3.50 V when tested at 5 mA. This tolerance reflects the 'C' grade within the BZX384 series and is confirmed in Table 8 of the Nexperia datasheet Rev. 4.
What is the maximum power dissipation for BZX384-C3V3/ZLX?
The BZX384-C3V3/ZLX has a total power dissipation (Ptot) rating of 300 mW at ambient temperatures ≤25 °C when mounted on an FR4 PCB with single-sided copper and standard SOD323 footprint. Derating is required above 25 °C per the thermal resistance of 415 K/W.
Does BZX384-C3V3/ZLX have a specified reverse current at 1 V?
Yes - the BZX384-C3V3/ZLX exhibits a maximum reverse current (IR) of 5 μA at VR = 1 V, as specified in Table 8 of the Nexperia datasheet. This low leakage supports use in battery-powered or high-impedance sensing circuits where standby current must be minimized.
What is the thermal resistance from junction to ambient for BZX384-C3V3/ZLX?
The junction-to-ambient thermal resistance (Rth(j-a)) of BZX384-C3V3/ZLX is 415 K/W under free-air conditions with the device mounted on an FR4 PCB per Nexperia's standard test setup. This value governs temperature rise under continuous DC bias and informs thermal design margins.
How is the cathode identified on BZX384-C3V3/ZLX?
The cathode of BZX384-C3V3/ZLX is marked by a bar on the package body and corresponds to Pin 1 per Table 2 (Pinning Information). In the SOD323 outline, the marking bar aligns with the left-hand terminal when the cathode tab faces upward and the device is viewed from top with leads pointing downward.
BZX384-C3V3/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 700 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-C3V3/ZLX FAQ
1.How can I place an order for BZX384-C3V3/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C3V3/ZLX 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-C3V3/ZLX reliable?
The price and inventory of BZX384-C3V3/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-C3V3/ZLX is usually 5 days.
3.What payment methods are accepted for BZX384-C3V3/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C3V3/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C3V3/ZLX?
BZX384-C3V3/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C3V3/ZLX 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-C3V3/ZLX?
For technical support, including BZX384-C3V3/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C3V3/ZLX requirements.
6.How does Aetrix verify that BZX384-C3V3/ZLX is sourced from the original manufacturer or authorized distributors?
All BZX384-C3V3/ZLX 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-C3V3/ZLX meets industry standards.
7.What is the process for return or replacement of BZX384-C3V3/ZLX?
All BZX384-C3V3/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C3V3/ZLX, 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-C3V3/ZLX part is unused and in its original packaging.
Return procedure for BZX384-C3V3/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C3V3/ZLX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAJ4744A-TP
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