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Nexperia USA Inc. BZX384-A36-QX
- Part No.:
- BZX384-A36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A36-QX.pdf
- Description:
- DIODE ZENER 36V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,195
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Product details
Overview
BZX384-A36-Q from Nexperia is a ±1 % 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 voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-A36-Q datasheet, BZX384-A36-Q pinout, BZX384-A36-Q application, or BZX384-A36-Q equivalent, this device serves as a precision low-power voltage clamp in ECU power rails, sensor biasing networks, and ADC reference stabilization where tight tolerance and automotive-grade reliability are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified 35.64 V to 36.36 V working voltage range at IZ = 5 mA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance ≤350 Ω. Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 μs pulses.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it features a cathode-marked SOD323 outline, thermal resistance from junction to ambient of 415 K/W, and reverse current ≤90 μA at VR = 28.8 V (80 % of VZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 35.64 V to 36.36 V at IZ = 5 mA - defines precise clamping threshold for 36 V rail regulation |
| Tolerance | ±1 % - enables high-accuracy voltage references without trimming in automotive modules |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - limits continuous DC power handling on standard PCB layout |
| Differential Resistance (rdif) | ≤350 Ω - determines output impedance and load regulation sensitivity in shunt configuration |
| Reverse Current (IR) | ≤90 μA at VR = 28.8 V - ensures low leakage before breakdown onset in standby circuits |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient surge suppression in CAN/LIN bus protection |
| Junction Temperature (Tj) | −65 °C to +150 °C - validated for under-hood automotive environments including engine control units |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted package with 2 leads; cathode identified by marking bar on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; reverse-bias anode-to-cathode establishes breakdown conduction path |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation loop with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body control modules |
| ±1 % voltage tolerance | Reduces need for post-assembly calibration in precision reference designs |
| 300 mW power rating | Supports stable operation in compact SMD layouts without forced cooling |
| 40 W surge capability | Withstands ISO 7637-2 pulse 1/2a/3a transients in 12 V vehicle systems |
| SOD323 footprint | Enables high-density placement on space-constrained PCBs such as ADAS sensor nodes |
Applications
| Engine Control Unit (ECU) Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Stabilizing 5 V or 3.3 V reference for microcontroller ADC inputs in engine management systems. IC Role / Device Role / Timing Role: Shunt voltage regulator providing low-drift, low-noise reference point independent of supply ripple. Use Value: Maintains <±0.36 V error across temperature and life cycle due to ±1 % tolerance and −65 °C to +150 °C operation. |
Use Scenario: Biasing pressure, temperature, or position sensors in HVAC or chassis modules. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent sensor excitation voltage despite battery fluctuations. Use Value: Limits variation to <±0.36 V over full automotive temperature range, improving sensor linearity and repeatability. |
| Infotainment Power Rail Clamp | CAN Transceiver Protection |
Use Scenario: Protecting 3.3 V or 5 V logic rails in head unit power supplies against load dump spikes. IC Role / Device Role / Timing Role: Fast-acting shunt limiter absorbing transient energy during ignition cycling. Use Value: Clamps surges up to 40 W (100 μs) without degradation, preserving downstream SoC integrity. |
Use Scenario: Safeguarding CANH/CANL pins against ESD and inductive kickback in gateway modules. IC Role / Device Role / Timing Role: Low-capacitance (≤45 pF) Zener placed between bus lines and ground to suppress common-mode transients. Use Value: Adds <100 pF parasitic capacitance while enabling robust 8 kV HBM ESD protection per AEC-Q101 test plan. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B36-Q | ±2 % tolerance (35.3 V–36.7 V), higher rdif (≤350 Ω vs. ≤350 Ω), same Ptot and package | Acceptable where tighter regulation is not required; lower cost for non-safety-critical subsystems | Select when AEC-Q101 compliance is retained but ±1 % accuracy is unnecessary |
| MMSZ4702T1G | ±5 % tolerance (34.2 V–37.8 V), 500 mW Ptot, SOD-123 package, no AEC-Q101 qualification | Higher power margin but larger footprint and unqualified for automotive use | Use only in industrial or consumer applications where automotive reliability is not mandated |
Compared with BZX384-B36-Q and MMSZ4702T1G, the BZX384-A36-Q uniquely delivers ±1 % precision combined with AEC-Q101 qualification in the smallest SOD323 footprint-making it the sole choice for safety-relevant voltage references in modern ECUs and ADAS domains.
Availability
BZX384-A36-Q is available at Aetrix Electronics and suitable for automotive ECU design, sensor signal conditioning, infotainment power management, and CAN/LIN bus protection requiring stable component supply across production lifecycles.
Supply support for BZX384-A36-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 mobile markets.
The BZX384-Q series belongs to Nexperia's automotive-qualified Zener portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX384-A36-Q is not rated for continuous reverse current; it operates in Zener breakdown mode with a maximum DC power dissipation of 300 mW. At its 36 V nominal voltage, this corresponds to ~8.3 mA average current. Exceeding this requires derating per thermal resistance (Rth(j-a) = 415 K/W) and ambient conditions.
Does this part have a specified junction-to-case thermal resistance?
No-only junction-to-ambient (415 K/W) and junction-to-solder-point (110 K/W) thermal resistances are specified. The latter applies to the cathode tab solder joint and is used for board-level thermal modeling in reflow-soldered SOD323 layouts.
Can BZX384-A36-Q be used in parallel for higher power handling?
No-Zener diodes exhibit negative temperature coefficients and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or active regulation instead.
Is the 40 W non-repetitive peak power rating tested per JEDEC standards?
Yes-the 40 W rating follows IEC 60134 Absolute Maximum Ratings with defined test conditions: 100 μs square-wave pulse, Tj = 25 °C prior to surge, and compliance verified per AEC-Q101 stress test protocols for transient robustness.
BZX384-A36-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:
- ±1%
- 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-A36-QX FAQ
1.How can I place an order for BZX384-A36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A36-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-A36-QX reliable?
The price and inventory of BZX384-A36-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-A36-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A36-QX?
BZX384-A36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A36-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-A36-QX?
For technical support, including BZX384-A36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A36-QX requirements.
6.How does Aetrix verify that BZX384-A36-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A36-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-A36-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A36-QX?
All BZX384-A36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A36-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-A36-QX part is unused and in its original packaging.
Return procedure for BZX384-A36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A36-QX Tags
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