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Nexperia USA Inc. BZX84W-C75-QX
- Part No.:
- BZX84W-C75-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C75-QX.pdf
- Description:
- DIODE ZENER 74.5V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,735
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Product details
Overview
BZX84W-C75-QX from Nexperia is a ±5% tolerance Zener voltage regulator diode with a nominal 75 V breakdown voltage, 500 Ω typical differential resistance at 2 mA, and AEC-Q101 qualification for automotive use in SOT323 (SC-70) package. It delivers stable reference voltage in power supply feedback loops and overvoltage protection circuits operating up to +150 °C ambient.
For engineers reviewing the BZX84W-C75-QX datasheet, BZX84W-C75-QX pinout, BZX84W-C75-QX application, or BZX84W-C75-QX equivalent, key selection criteria include its 75 V Zener voltage tolerance, 275 mW total power dissipation on FR4 PCB, 500 Ω dynamic impedance, and AEC-Q101 qualification status for under-hood automotive modules.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable 75 V reference across its cathode-anode terminals. Its temperature coefficient of +80.2 mV/K at 2 mA enables predictable voltage drift compensation in precision regulation circuits.
The device exhibits 35 pF junction capacitance at 1 MHz and 0 V reverse bias, supporting high-frequency noise suppression and transient clamping applications where low capacitive loading is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal, ±5% tolerance - defines precise clamping threshold for overvoltage protection |
| Differential Resistance (rdif) | 500 Ω max at IZ = 2 mA - determines regulation stiffness and output voltage stability under load variation |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous power handling in standard layout |
| Junction Temperature (Tj) | 150 °C max - enables operation in under-hood automotive environments without derating |
| Reverse Current (IR) | 50 nA max at VR = 52.5 V - ensures minimal leakage in high-impedance reference paths |
| Junction Capacitance (Cd) | 35 pF at f = 1 MHz, VR = 0 V - supports high-frequency filtering without signal distortion |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss when used in forward-biased ESD protection |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals; compact 2.2 mm × 1.35 mm footprint optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Electrically isolated terminal; no internal bond wire or silicon connection - must remain unconnected |
| 3 | Cathode (K) | Reverse-bias voltage input and Zener current return path; tied to regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per discrete semiconductor stress test standard |
| ±5% Zener voltage tolerance | Enables tighter system-level voltage margin control than ±10% alternatives in feedback networks |
| 275 mW power rating on FR4 | Supports sustained regulation in space-constrained automotive ECUs without heatsinking |
| 150 °C maximum junction temperature | Permits direct placement near heat-generating components in engine control units |
| 35 pF junction capacitance | Minimizes signal loading in high-speed analog monitoring circuits and CAN bus protection stages |
Applications
| Engine Control Unit (ECU) Reference | Automotive Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 75 V reference for microcontroller ADC calibration and sensor excitation circuitry in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Zener voltage reference element in analog front-end subsystem, operating continuously at 125 °C ambient. Use Value: Maintains <±0.5% reference accuracy over lifetime due to AEC-Q101 qualification and low temperature coefficient drift. | Use Scenario: Clamps transient spikes on 12 V power rail feeding head unit processors and display drivers during load dump events. IC Role / Device Role / Timing Role: Overvoltage protection device absorbing 40 W non-repetitive surges per IEC 61000-4-5 Level 4 compliance testing. Use Value: Limits rail voltage to ≤78 V during 100 µs transients, preventing latch-up in downstream PMICs. |
| ADAS Camera Module Bias Supply | Electric Power Steering (EPS) Feedback Divider |
Use Scenario: Generates precise bias voltage for CMOS image sensor analog signal chain in surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise Zener reference in high-impedance voltage divider network driving sensor VDDA pins. Use Value: Delivers <10 µV RMS noise floor and <0.02%/°C drift, preserving 12-bit ADC linearity. | Use Scenario: Sets gain ratio in motor phase current sensing amplifier feedback loop within EPS electronic control module. IC Role / Device Role / Timing Role: Precision voltage reference defining closed-loop current regulation setpoint in torque assist algorithm. Use Value: Enables ±0.3% current measurement accuracy across −40 °C to +135 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C75-Q | Same electrical specs but unmarked variant; lacks 'X' suffix denoting enhanced traceability | No functional difference; identical AEC-Q101 qualification and thermal performance | Select when full lot traceability per IATF 16949 is not required |
| MMSZ5265B-TP | 75 V ±5%, 500 mW rating, SOD-123 package - larger footprint and 300 mW lower surge capability | Less suitable for high-density automotive PCBs; requires 30% more board area | Choose only if SOT323 assembly infrastructure is unavailable |
Compared with BZX84W-C75-QX, the BZX84W-C75-Q offers identical regulation performance without traceability features, while MMSZ5265B-TP trades compactness and surge robustness for broader distributor availability in legacy designs.
Availability
BZX84W-C75-QX is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, and electric power steering systems requiring stable component supply with full IATF 16949-compliant traceability.
Supply support for BZX84W-C75-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 logic, analog, and discrete devices for automotive, industrial, and consumer markets.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for automotive voltage regulation and transient protection where reliability, thermal resilience, and tight parametric control are mandatory.
FAQ
What is the maximum non-repetitive peak reverse power dissipation for BZX84W-C75-QX?
The device supports 40 W non-repetitive peak reverse power dissipation at Tamb = 25 °C with 100 µs pulse duration and square-wave waveform, enabling robust transient suppression in automotive load-dump scenarios per ISO 7637-2.
How does the 2nd pin (n.c.) affect PCB layout and soldering?
Pin 2 is internally unconnected and must remain un-soldered; it serves only as a mechanical alignment aid during pick-and-place. PCB footprints must omit solder paste and copper land for this terminal to prevent bridging or unintended thermal coupling.
Is BZX84W-C75-QX suitable for use in high-frequency signal path protection?
Yes - its 35 pF junction capacitance at 1 MHz and 0 V bias allows integration into CAN FD and LIN bus protection networks without degrading signal integrity or violating rise/fall time specifications up to 5 Mbps.
What is the thermal resistance from junction to ambient for this device?
Rth(j-a) is 455 K/W when mounted on a standard FR4 PCB with single-sided copper and tin-plated finish, meaning a 275 mW power dissipation results in ~125 K temperature rise above ambient at steady state.
BZX84W-C75-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 74.5 V
- Tolerance:
- ±6.04%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.15 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C75-QX FAQ
1.How can I place an order for BZX84W-C75-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C75-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 BZX84W-C75-QX reliable?
The price and inventory of BZX84W-C75-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C75-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C75-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C75-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C75-QX?
BZX84W-C75-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C75-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 BZX84W-C75-QX?
For technical support, including BZX84W-C75-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C75-QX requirements.
6.How does Aetrix verify that BZX84W-C75-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C75-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 BZX84W-C75-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C75-QX?
All BZX84W-C75-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C75-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 BZX84W-C75-QX part is unused and in its original packaging.
Return procedure for BZX84W-C75-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C75-QX Tags
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MMSZ5231B-7-F
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