My Inquiry
My Account
Nexperia USA Inc. BZX384-A9V1X
- Part No.:
- BZX384-A9V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A9V1X.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,246
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-A9V1X 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 space-constrained PCBs. It delivers 9.1 V nominal breakdown at 5 mA, with 100 Ω typical differential resistance, 0.5 μA reverse current at 7.3 V, and operates across –65 °C to +150 °C ambient.
For engineers reviewing the BZX384-A9V1X datasheet, BZX384-A9V1X pinout, BZX384-A9V1X application, or BZX384-A9V1X equivalent, this page provides verified electrical parameters, thermal behavior, SOD323 footprint details, and real-world use cases in power rail stabilization, overvoltage protection, and analog reference circuits.
Technical Context
This device functions as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener voltage. Its ±1 % tolerance ensures tight regulation accuracy critical for feedback loops and reference generation.
Thermal resistance from junction to ambient is 415 K/W on FR4 PCB, limiting continuous power dissipation to 300 mW at 25 °C ambient. Non-repetitive peak reverse power handling reaches 40 W for 100 μs pulses, enabling transient surge suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.00 V to 9.20 V at IZ = 5 mA - defines precise clamping threshold for 9.1 V nominal regulation |
| Differential Resistance (rdif) | 100 Ω max - determines regulation stiffness and output impedance under varying load |
| Reverse Current (IR) | 0.5 μA max at VR = 7.3 V - ensures minimal leakage below breakdown, critical for battery-powered systems |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - enables predictable forward conduction during polarity reversal or ESD events |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum steady-state power budget on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient overvoltage suppression without failure |
| Junction Temperature (Tj) | –65 °C to +150 °C - validates operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2-pin, small outline, cathode-marked with bar; dimensions 1.8 mm × 1.35 mm × 0.95 mm; optimized for reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt path when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct replacement in high-accuracy feedback networks without recalibration |
| Low 100 Ω differential resistance | Minimizes output voltage shift under load variation, improving regulation stability |
| 0.5 μA max reverse leakage at 7.3 V | Reduces standby current in always-on circuits, extending battery life in portable devices |
| 40 W non-repetitive peak power rating | Provides robustness against short-duration ESD and surge events without derating |
| SOD323 footprint compatibility | Supports high-density layouts and automated assembly with industry-standard pick-and-place equipment |
Applications
| Power Supply Rail Clamping | ADC Reference Stabilization |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from overvoltage transients on 9 V supply rails. IC Role / Device Role / Timing Role: Shunt regulator clamping rail to 9.1 V before reaching sensitive input thresholds. Use Value: Prevents latch-up and permanent damage while maintaining <0.5 μA leakage during normal operation. |
Use Scenario: Providing stable 9.1 V reference for 12-bit SAR ADC in industrial sensor front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference source with <100 Ω dynamic impedance. Use Value: Limits reference drift to <±0.5 LSB over temperature due to ±1 % initial tolerance and low tempco. |
| ESD Protection Network | Feedback Loop Compensation |
Use Scenario: Secondary clamping stage in USB port protection circuit alongside TVS diode. IC Role / Device Role / Timing Role: Precision secondary clamp absorbing residual energy after primary TVS conduction. Use Value: Handles 40 W surges up to 100 μs duration while holding clamped voltage within 9.2 V limit. |
Use Scenario: Setting precise voltage threshold in op-amp comparator hysteresis network. IC Role / Device Role / Timing Role: Stable bias point generator defining switching thresholds with minimal thermal drift. Use Value: Temperature coefficient of +3.8 mV/K at 5 mA ensures predictable hysteresis window shift across –40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5240BS-7-F | 9.1 V ±5 % tolerance; 150 Ω rdif; 10 μA IR at 7.3 V | Higher leakage and looser tolerance reduce accuracy in precision references | Select when cost sensitivity outweighs regulation accuracy requirements |
| Vishay BZX384-C9V1 | 9.1 V ±5 % tolerance; same SOD323 package; 150 Ω rdif | Lower cost but unsuitable for closed-loop feedback where ±1 % tolerance is mandatory | Choose only for non-critical clamping where 9.1 V ±0.45 V is acceptable |
Compared with BZX384-A9V1X, MMBZ5240BS-7-F offers lower unit cost but sacrifices 5× higher leakage and 5× wider tolerance, while BZX384-C9V1 shares identical packaging and thermal performance but lacks the tight regulation needed for analog signal chains.
Availability
BZX384-A9V1X is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical monitors, and automotive body control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX384-A9V1X 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX384 series belongs to Nexperia's precision Zener regulator product line, engineered specifically for low-power, high-accuracy voltage reference and clamping in compact consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current the BZX384-A9V1X can sustain at 25 °C ambient?
The device supports up to 250 mA forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 25 °C ambient, Ptot = 300 mW and VZ ≈ 9.1 V yield a maximum sustainable reverse current of ~33 mA - exceeding typical reference or clamping use cases while staying within thermal limits.
How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?
At IZ = 5 mA, the BZX384-A9V1X exhibits a +3.8 mV/K temperature coefficient. Over an 165 °C range, this produces ~627 mV total drift - approximately ±3.5 % of nominal VZ. For high-stability applications, this must be compensated via circuit design or paired with temperature-insensitive references.
Can BZX384-A9V1X replace a 1N4739A in existing designs?
No - the 1N4739A is a through-hole DO-41 device rated for 1 W, while BZX384-A9V1X is an SMD SOD323 part rated for 300 mW. Although both target 9.1 V regulation, the power handling, thermal profile, and package geometry differ significantly; redesign of PCB layout and thermal relief is required for substitution.
Is the SOD323 footprint compatible with automated optical inspection (AOI) systems?
Yes - the SOD323 package features clearly defined cathode marking (bar), consistent pad geometry (0.6 mm × 1.15 mm), and standardized solder mask clearance per IPC-7351B. These attributes enable reliable detection and measurement by AOI systems during post-reflow inspection.
BZX384-A9V1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A9V1X FAQ
1.How can I place an order for BZX384-A9V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A9V1X 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-A9V1X reliable?
The price and inventory of BZX384-A9V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A9V1X is usually 5 days.
3.What payment methods are accepted for BZX384-A9V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A9V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A9V1X?
BZX384-A9V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A9V1X 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-A9V1X?
For technical support, including BZX384-A9V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A9V1X requirements.
6.How does Aetrix verify that BZX384-A9V1X is sourced from the original manufacturer or authorized distributors?
All BZX384-A9V1X 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-A9V1X meets industry standards.
7.What is the process for return or replacement of BZX384-A9V1X?
All BZX384-A9V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A9V1X, 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-A9V1X part is unused and in its original packaging.
Return procedure for BZX384-A9V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A9V1X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
