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Nexperia USA Inc. BZX384-A75-QX
- Part No.:
- BZX384-A75-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A75-QX.pdf
- Description:
- DIODE ZENER 75V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,379
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Product details
Overview
BZX384-A75-QX from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 75 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-A75-QX datasheet, BZX384-A75-QX pinout, BZX384-A75-QX application, or BZX384-A75-QX equivalent, this device serves as a precision low-power shunt regulator where stable 75 V clamping, low differential resistance (500 Ω max), and temperature-stable operation (SZ = +52.5 mV/K) are required in space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and supply conditions. Its 75 V nominal Zener voltage is specified at IZ = 2 mA with ±1 % tolerance, and it exhibits a positive temperature coefficient of +52.5 mV/K - enabling predictable drift compensation in temperature-sensitive regulation paths.
The device supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), has a maximum reverse current of 0.2 μA at VR = 57 V, and features a junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - defining its safe operating area under transient and steady-state conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 74.25 V to 75.75 V at IZ = 2 mA - ensures tight 75 V regulation with ±1 % accuracy for precision reference designs |
| Differential Resistance (rdif) | ≤500 Ω at IZ = 2 mA - limits output impedance to maintain regulation stability under dynamic load changes |
| Reverse Current (IR) | ≤0.2 μA at VR = 57 V - guarantees minimal leakage in high-impedance bias networks and standby circuits |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines continuous DC power handling on standard FR4 PCB with single-sided copper |
| Non-repetitive Peak Power | 40 W (100 μs pulse) - enables robust transient overvoltage suppression without device failure |
| Temperature Coefficient (SZ) | +52.5 mV/K at IZ = 2 mA - provides known, linear voltage drift for thermal compensation circuit design |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in extended automotive under-hood environments |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 2.3 mm × 1.35 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTRB, HTSL, and temperature cycling - suitable for engine control and ADAS power rails |
| ±1 % Zener tolerance | Tighter than BZX384-B (±2 %) and BZX384-C (~±5 %) variants - reduces system-level calibration burden in precision feedback loops |
| Low-profile SOD323 package | Height < 1.1 mm and footprint < 3.1 mm² - enables placement in dense power management IC layouts and compact ECU modules |
| 40 W surge capability | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation - eliminates need for external TVS in many 12 V/24 V vehicle subsystems |
| 150 °C max junction temperature | Enables operation adjacent to power MOSFETs or DC-DC converters without derating in under-dash electronics |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 75 V auxiliary supply for LIN transceivers and LED drivers in door modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias for op-amps and comparators in isolated 75 V domains. Use Value: ±1 % tolerance eliminates post-production trimming; AEC-Q101 rating ensures 15-year field reliability in cyclic thermal environments. |
Use Scenario: Clamping analog sensor outputs (e.g., pressure transducers) referenced to 75 V excitation rails. IC Role / Device Role / Timing Role: Precision Zener clamp limiting signal swing to protect downstream ADC inputs from overvoltage events. Use Value: 500 Ω rdif maintains linearity within 0.5 % error band across 0–2 mA load variation. |
| Telecom Power Supervision | Medical Imaging HV Bias Supply |
Use Scenario: Monitoring 75 V intermediate bus in PoE-powered remote PHY units. IC Role / Device Role / Timing Role: Reference element in discrete comparator-based undervoltage/overvoltage detection circuit. Use Value: +52.5 mV/K temperature coefficient allows predictable offset correction in firmware calibration routines. |
Use Scenario: Stabilizing 75 V bias for photomultiplier tube (PMT) gain control in portable X-ray detectors. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing precise gain-setting point in high-impedance analog front-end. Use Value: 0.2 μA reverse leakage at 57 V prevents measurable current injection into ultra-low-current PMT anode nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B75-Q | ±2 % tolerance (73.5 V–76.5 V), higher max rdif (500 Ω vs. 500 Ω same), identical Ptot and Tj | Suitable for non-critical biasing where ±2 % is acceptable; lower cost but requires tighter system tolerance budget | Select when cost sensitivity outweighs need for ±1 % regulation accuracy in non-feedback paths |
| MMSZ5265B-TP | 75 V nominal, ±5 % tolerance, SOD-123 package (larger footprint), 500 mW Ptot, no AEC-Q101 qualification | Acceptable for industrial/commercial use only; lacks automotive qualification and has looser tolerance | Choose only for non-automotive prototypes or cost-driven consumer designs where qualification is not mandated |
Compared with BZX384-B75-Q, the BZX384-A75-QX delivers tighter voltage control critical for closed-loop systems; versus MMSZ5265B-TP, it offers automotive qualification, smaller SOD323 footprint, and guaranteed low-leakage performance at elevated temperatures.
Availability
BZX384-A75-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, telecom power monitoring, and medical imaging bias supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX384-A75-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 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 precision voltage reference and transient protection in harsh automotive environments where space, reliability, and parametric consistency are critical.
FAQ
What is the maximum continuous reverse current the BZX384-A75-QX can sustain at 75 V?
The BZX384-A75-QX is not rated for continuous conduction at 75 V - it operates in Zener breakdown only when biased above its nominal VZ. At VR = 57 V (76 % of VZ), reverse current is limited to 0.2 μA. Continuous operation must remain within Ptot = 300 mW, implying max IZ ≈ 4 mA at 75 V, but derating is required above 25 °C ambient per Rth(j-a) = 415 K/W.
Does the BZX384-A75-QX have a defined forward voltage specification?
Yes - forward voltage is specified as ≤0.9 V at IF = 10 mA and ≤1.1 V at IF = 100 mA (pulse test, tp ≤ 100 μs). This parameter matters for polarity-protection configurations or dual-diode clamp arrangements where forward conduction may occur during fault conditions.
How does the +52.5 mV/K temperature coefficient impact circuit design?
The positive temperature coefficient means VZ increases ~52.5 mV per Kelvin rise in junction temperature. In precision references, this drift must be compensated - e.g., by pairing with a negative-TC component or using lookup-table correction in microcontroller-based monitoring systems. It is not a flaw but a characterized, repeatable behavior.
Can the BZX384-A75-QX replace older BZX384-A75 variants without layout changes?
Yes - BZX384-A75-QX uses the identical SOD323 package, pinning (cathode-bar orientation), and solder footprint as legacy BZX384-A75 parts. The "-QX" suffix denotes Nexperia's qualified automotive grade with full AEC-Q101 documentation; mechanical and electrical compatibility is maintained per datasheet Rev. 1 (2021).
BZX384-A75-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):
- 75 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-A75-QX FAQ
1.How can I place an order for BZX384-A75-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A75-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-A75-QX reliable?
The price and inventory of BZX384-A75-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-A75-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A75-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A75-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A75-QX?
BZX384-A75-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A75-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-A75-QX?
For technical support, including BZX384-A75-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A75-QX requirements.
6.How does Aetrix verify that BZX384-A75-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A75-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-A75-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A75-QX?
All BZX384-A75-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A75-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-A75-QX part is unused and in its original packaging.
Return procedure for BZX384-A75-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A75-QX Tags
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MM5Z5V1ST1G
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