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Nexperia USA Inc. BZX384-B36-QX
- Part No.:
- BZX384-B36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B36-QX.pdf
- Description:
- DIODE ZENER 36V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,591
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Product details
Overview
BZX384-B36-QX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 36 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable reference voltage in low-power supply regulation and overvoltage protection circuits.
For engineers reviewing the BZX384-B36-QX datasheet, BZX384-B36-QX pinout, BZX384-B36-QX application, or BZX384-B36-QX equivalent, key selection criteria include its 36 V Zener voltage tolerance, thermal resistance (Rth(j-a) = 415 K/W), non-repetitive peak reverse power (40 W), and automotive qualification status.
Technical Context
This device operates as a two-terminal silicon Zener diode, conducting in reverse bias above its specified breakdown voltage (VZ = 35.3 V to 36.7 V at IZ = 5 mA) with differential resistance ≤350 Ω and temperature coefficient of +0.05 mV/K. Its junction-to-ambient thermal resistance is 415 K/W on standard FR4 PCB.
The diode supports pulsed operation up to 40 W (tp = 100 μs, square wave) and maintains reverse current ≤0.9 μA at VR = 28.8 V (80 % of VZ), enabling reliable clamping in transient suppression and precision reference applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.3 V to 36.7 V at IZ = 5 mA - defines precise clamping threshold for 36 V rail regulation |
| Tolerance | ±2 % - ensures tight voltage control vs. ±5 % (C-series) or ±1 % (A-series) alternatives |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous DC load in compact SOD323 footprint |
| Differential Resistance (rdif) | ≤350 Ω - determines output impedance and regulation stability under varying load |
| Reverse Current (IR) | ≤0.9 μA at VR = 28.8 V - confirms low leakage below clamping threshold |
| Non-repetitive Peak Power | 40 W (tp = 100 μs) - enables surge suppression without thermal runaway |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body size, cathode marked by bar.
| 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 testing |
| Low thermal resistance | Rth(j-sp) = 110 K/W to solder point - improves pulse handling via efficient heat transfer to PCB |
| Stable temperature coefficient | +0.05 mV/K at IZ = 2 mA - minimizes drift across −40 °C to +125 °C operating range |
| Small-footprint packaging | SOD323 outline (1.35 × 0.85 × 0.95 mm) - enables high-density layout in space-constrained modules |
| Precision voltage grading | E24 series with 37 values (2.4 V–75 V) - simplifies BOM rationalization across voltage rails |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Voltage reference for microcontroller ADC input in door module power management. IC Role / Device Role / Timing Role: Zener clamp stabilizing 36 V supply rail feeding LDO that powers MCU core. Use Value: ±2 % tolerance ensures consistent ADC full-scale reference despite battery voltage fluctuations (9 V–16 V). |
Use Scenario: Overvoltage protection for 4–20 mA current loop transmitter output stage. IC Role / Device Role / Timing Role: Reverse-biased shunt regulator limiting output swing to 36 V during fault conditions. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs transients without degradation. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
|
Use Scenario: Secondary-side voltage sensing in flyback converter feedback network. IC Role / Device Role / Timing Role: Provides stable 36 V reference to optocoupler input, regulating primary-side PWM duty cycle. Use Value: 300 mW power rating supports continuous operation at 5 mA bias current with <1 % regulation error. |
Use Scenario: Precision voltage reference for analog front-end calibration in portable ultrasound unit. IC Role / Device Role / Timing Role: Zener-based reference generator for DAC offset trimming circuitry. Use Value: +0.05 mV/K tempco ensures <0.5 % reference drift over clinical operating temperature range (10 °C–40 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-A36-Q | ±1 % tolerance (35.64 V–36.36 V), lower rdif (≤325 Ω) | Higher accuracy required in metrology-grade references | Select when tighter voltage tolerance justifies cost premium and lower power margin is acceptable |
| BZX384-C36-Q | ±5 % tolerance (34.0 V–38.0 V), higher rdif (≤350 Ω), same Ptot | Cost-sensitive consumer power supplies with relaxed regulation specs | Choose for non-critical clamping where 36 V ±1.8 V meets system requirements |
Compared with BZX384-A36-Q, this part trades 1 % accuracy for broader process tolerance and identical thermal performance; versus BZX384-C36-Q, it delivers twice the voltage precision while maintaining identical surge capability and footprint.
Availability
BZX384-B36-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, medical diagnostic equipment, and consumer power adapter designs requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX384-B36-QX 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 energy-efficient solutions.
The BZX384-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, designed specifically for robust voltage reference and overvoltage protection in harsh-environment electronic control units.
FAQ
What is the maximum continuous forward current for BZX384-B36-QX?
The device is not rated for continuous forward conduction; its absolute maximum forward current is 250 mA per limiting values table, but typical operation is reverse-biased. Forward voltage is 0.9 V at 10 mA pulse test (tp ≤ 100 μs), and sustained forward bias risks thermal damage due to low power rating.
Can BZX384-B36-QX replace a 1N4733A in existing designs?
No - the 1N4733A is a 500 mW, DO-41 through-hole Zener with 5.1 V rating and ±5 % tolerance. BZX384-B36-QX is a 36 V, 300 mW, SOD323 surface-mount device with ±2 % tolerance and different thermal characteristics; direct substitution requires PCB redesign and validation of voltage, power, and layout constraints.
How does the marking code 'N1' identify BZX384-B36-QX?
Per Table 4, 'N1' is the unique top-side marking for BZX384-B36-QX, laser-etched on the cathode end of the SOD323 package. The bar adjacent to pin 1 indicates cathode polarity, and 'N1' distinguishes it from A-series (e.g., '4S' for BZX384-A36-Q) and C-series (e.g., 'DN' for BZX384-C36-Q) variants.
Is derating required for operation above 25 °C ambient?
Yes - total power dissipation must be linearly derated above 25 °C at 2.4 mW/°C, based on Rth(j-a) = 415 K/W. At 85 °C ambient, maximum allowable Ptot drops to 156 mW (300 mW − (85 − 25) × 2.4 mW), ensuring junction temperature remains ≤150 °C under worst-case conduction.
BZX384-B36-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):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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-B36-QX FAQ
1.How can I place an order for BZX384-B36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B36-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-B36-QX reliable?
The price and inventory of BZX384-B36-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-B36-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B36-QX?
BZX384-B36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B36-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-B36-QX?
For technical support, including BZX384-B36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B36-QX requirements.
6.How does Aetrix verify that BZX384-B36-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B36-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-B36-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B36-QX?
All BZX384-B36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B36-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-B36-QX part is unused and in its original packaging.
Return procedure for BZX384-B36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B36-QX Tags
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