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Nexperia USA Inc. BZT52H-C4V3-QX
- Part No.:
- BZT52H-C4V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-C4V3-QX.pdf
- Description:
- DIODE ZENER 4.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:4,600
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Product details
Overview
BZT52H-C4V3-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 4.3 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-C4V3-QX datasheet, BZT52H-C4V3-QX pinout, BZT52H-C4V3-QX application, or BZT52H-C4V3-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse current, and automotive qualification status - all critical for precision biasing, overvoltage clamping, and stable reference design in harsh environments.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a specified VZ = 4.0–4.6 V at IZ = 5 mA, exhibiting a temperature coefficient of −3.5 to 0.0 mV/K and differential resistance ≤95 Ω. It supports continuous forward conduction up to 250 mA and withstands non-repetitive peak reverse currents up to 6.0 A.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 70 K/W junction-to-solder-point thermal resistance when mounted with a 1 cm² cathode pad, enabling reliable thermal management in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0 V to 4.6 V at IZ = 5 mA - defines precise clamping threshold for 5 V rail protection |
| Tolerance | ±5 % - enables cost-optimized selection where tight regulation is not required |
| Differential Resistance (rdif) | ≤95 Ω - limits output impedance drift under varying load current |
| Reverse Current (IR) | ≤3 μA at VR = 1 V - ensures low leakage in standby or low-power modes |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports sustained operation in compact automotive ECUs |
| Junction Temperature (Tj) | −65 °C to +150 °C - meets extended thermal range requirements for under-hood electronics |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, ESD, and temperature cycling |
Pinout & Package
SOD123F plastic surface-mount package: 2-terminal, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| 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 reference; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including high-temperature operating life and mechanical shock testing |
| 830 mW power rating | Enables robust voltage clamping in transient suppression circuits without derating at 25 °C ambient |
| ±5 % VZ tolerance | Supports cost-sensitive designs where tighter regulation is unnecessary, e.g., non-critical bias networks |
| Low thermal resistance (70 K/W) | Allows efficient heat transfer from junction to solder point on standard FR4 PCBs |
| SOD123F footprint | Compatible with automated pick-and-place and reflow soldering; occupies < 6 mm² board area |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V reference for LIN transceiver bias and microcontroller I/O protection in door module PCBs. IC Role / Device Role / Timing Role: Zener clamp providing overvoltage protection and local voltage reference for analog front-end circuitry. Use Value: Maintains reference stability across −40 °C to +125 °C ambient while surviving load dump transients per ISO 7637-2. |
Use Scenario: Biasing thermistor bridges and op-amp input stages in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation and sensor offset trimming. Use Value: Delivers < 3 μA reverse leakage at 1 V reverse bias, minimizing measurement error in high-impedance sensor interfaces. |
| Consumer Power Adapter Feedback Loop | Medical Diagnostic Equipment Power Sequencing |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener-based feedback shunt regulating optocoupler LED current to control primary-side PWM duty cycle. Use Value: Achieves ±5 % output regulation accuracy with 95 Ω dynamic impedance, reducing need for post-regulation LDOs. |
Use Scenario: Enabling controlled power-up sequencing of FPGA, ADC, and analog supply rails in portable ultrasound units. IC Role / Device Role / Timing Role: Voltage supervisor reference element triggering reset logic when main 3.3 V rail reaches 95 % of nominal. Use Value: Provides repeatable 4.3 V threshold with −3.5 mV/K tempco, ensuring timing margin across clinical operating temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B4V3-Q | ±2 % VZ tolerance, 95 Ω rdif, same SOD123F package | Higher precision needed for feedback loops requiring tighter output regulation | Select when ±2 % tolerance justifies marginal cost increase over ±5 % grade |
| MMSZ4V3T1G | ±5 % VZ, 500 mW Ptot, SOD-123 package (not AEC-Q101 qualified) | Non-automotive consumer applications with lower power and reliability requirements | Choose only for cost-driven commercial designs where AEC-Q101 compliance is not mandated |
Compared with BZT52H-C4V3-QX, the BZT52H-B4V3-Q offers tighter tolerance at identical thermal and package specs, while MMSZ4V3T1G sacrifices automotive qualification and power rating for lower unit cost in non-critical systems.
Availability
BZT52H-C4V3-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-C4V3-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 BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, reference, and overvoltage protection where robustness and thermal stability are mandatory.
FAQ
What is the maximum reverse voltage (VR) before significant leakage occurs?
At VR = 1 V, reverse current is guaranteed ≤3 μA. Leakage rises sharply above 3.5 V, reaching ~100 μA at 4.0 V and entering breakdown near 4.0–4.6 V. Operation above 4.6 V is not recommended unless pulsed with strict current limiting.
Can BZT52H-C4V3-QX 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 external current-sharing resistors with derated total power.
Is the SOD123F package compatible with standard reflow profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method. The SOD123F footprint aligns with IPC-7351B standards, and the device supports JEDEC J-STD-020D-compliant peak temperatures up to 260 °C for ≤30 seconds.
How does the −3.5 to 0.0 mV/K temperature coefficient affect circuit performance?
This coefficient means VZ decreases slightly with rising temperature below ~4.7 V. At 4.3 V nominal, a 50 °C rise causes ~0.1–0.2 V drop, which must be accounted for in precision references but is acceptable for general-purpose clamping where absolute accuracy is secondary to robustness.
BZT52H-C4V3-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±6.98%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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:
- SOD-123F
BZT52H-C4V3-QX FAQ
1.How can I place an order for BZT52H-C4V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-C4V3-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 BZT52H-C4V3-QX reliable?
The price and inventory of BZT52H-C4V3-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-C4V3-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-C4V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C4V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-C4V3-QX?
BZT52H-C4V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-C4V3-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 BZT52H-C4V3-QX?
For technical support, including BZT52H-C4V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C4V3-QX requirements.
6.How does Aetrix verify that BZT52H-C4V3-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-C4V3-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 BZT52H-C4V3-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-C4V3-QX?
All BZT52H-C4V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C4V3-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 BZT52H-C4V3-QX part is unused and in its original packaging.
Return procedure for BZT52H-C4V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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