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Nexperia USA Inc. BZT52H-A3V3-QX
- Part No.:
- BZT52H-A3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,643
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Product details
Overview
BZT52H-A3V3-QX from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 3.3 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-A3V3-QX datasheet, BZT52H-A3V3-QX pinout, BZT52H-A3V3-QX application, or BZT52H-A3V3-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance (95 Ω), reverse current (5 μA at 1 V), and temperature coefficient (−3.5 to 0.0 mV/K) critical for precision biasing and overvoltage protection design.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ = 3.26–3.34 V at IZ = 5 mA and exhibits low dynamic impedance (rdif ≤ 95 Ω), enabling stable voltage reference under varying load conditions. Its −3.5 to 0.0 mV/K temperature coefficient ensures minimal drift across −65 °C to +150 °C ambient range.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it achieves Rth(j-a) = 330 K/W (free air) and Rth(j-sp) = 70 K/W (cathode solder point), supporting reliable thermal management in space-constrained automotive modules and industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 3.26–3.34 V at IZ = 5 mA - defines precise regulation threshold for 3.3 V rail stabilization |
| Tolerance | ±1 % - enables high-accuracy voltage references without post-production trimming |
| Differential Resistance rdif | ≤ 95 Ω - ensures low output impedance and minimal regulation error under load variation |
| Reverse Current IR | 5 μA max at VR = 1 V - guarantees low leakage in standby and low-power modes |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - supports robust operation in thermally constrained automotive ECUs |
| Thermal Resistance Rth(j-sp) | 70 K/W - enables effective heat transfer from junction to cathode solder pad on standard FR4 |
| Junction Temperature Range | −65 °C to +150 °C - meets extended temperature requirements for under-hood automotive electronics |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.6 × 1.7 × 1.0 mm (L × W × H); optimized for reflow soldering on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration establishes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity, and surge stress |
| ±1 % VZ tolerance | Reduces need for binning or external calibration in precision reference circuits |
| Low rdif (≤95 Ω) | Maintains regulation accuracy across ±10 % load current variation in feedback networks |
| 150 °C max junction temperature | Enables deployment in engine control units and transmission modules without derating |
| SOD123F footprint compatibility | Matches industry-standard reflow land pattern (2.9 × 1.6 mm occupied area) for seamless PCB integration |
Applications
| Automotive ECU Voltage Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 3.3 V reference for microcontroller ADC and analog front-end in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise bias point for analog signal chain. Use Value: ±1 % VZ tolerance and −3.5 to 0.0 mV/K temperature coefficient ensure <±10 mV drift over −40 °C to +125 °C operating range. |
Use Scenario: Regulating supply to analog sensors (e.g., pressure, temperature) in factory automation systems. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant excitation voltage despite input ripple or load transients. Use Value: 95 Ω differential resistance limits output voltage deviation to <0.5 V under 5 mA load step changes. |
| USB-C Power Delivery Clamp | Programmable Logic Controller Input Protection |
Use Scenario: Overvoltage clamping on 3.3 V auxiliary rails in USB-C PD controller subsystems. IC Role / Device Role / Timing Role: Fast-acting shunt protection device limiting transient spikes to safe levels. Use Value: 40 W non-repetitive peak power rating (100 μs pulse) absorbs ESD and surge events per IEC 61000-4-2 Level 4. |
Use Scenario: Input stage protection for 24 V digital inputs in PLC modules exposed to field wiring noise. IC Role / Device Role / Timing Role: Reverse-biased Zener clamp absorbing induced transients before reaching logic interface ICs. Use Value: 830 mW steady-state dissipation supports continuous clamping of 100 ms overvoltage events up to 5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B3V3-Q | ±2 % VZ tolerance (3.23–3.37 V); identical package and thermal specs | Suitable where tighter regulation is not required; lower cost tier | Select when system-level calibration compensates for wider tolerance band |
| BZX84-C3V3 | SOT-23 package; ±5 % VZ (3.1–3.5 V); 300 mW Ptot; no AEC-Q101 qualification | General-purpose consumer electronics only; not rated for automotive use | Use only in non-automotive, cost-sensitive designs with relaxed thermal and reliability requirements |
Compared with BZT52H-A3V3-QX, the BZT52H-B3V3-Q offers reduced precision at lower cost but maintains AEC-Q101 compliance, while BZX84-C3V3 sacrifices automotive qualification, power rating, and tolerance for smaller footprint and lower price in non-critical applications.
Availability
BZT52H-A3V3-QX is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, USB-C power delivery subsystems, and programmable logic controller input protection requiring stable component supply and AEC-Q101 assurance.
Supply support for BZT52H-A3V3-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 automotive-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient protection in harsh-environment vehicle electronics.
FAQ
What is the maximum reverse voltage (VR) this Zener can withstand before breakdown?
The BZT52H-A3V3-QX has a specified reverse voltage limit of 1 V at which reverse current is guaranteed ≤5 μA. Breakdown occurs at its nominal Zener voltage of 3.26–3.34 V when reverse-biased at IZ = 5 mA. Operation above 3.34 V in regulation mode is intentional and within specification.
Can this diode be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and manufacturing variations that cause current imbalance in parallel configurations. This leads to thermal runaway and premature failure. For higher power, use a single higher-rated device or active regulation instead.
Is the SOD123F package compatible with standard reflow profiles?
Yes - Nexperia specifies reflow soldering as the only recommended method for SOD123F. The package supports JEDEC J-STD-020-compliant profiles, with peak temperatures up to 260 °C and time above liquidus of 60–150 seconds, provided the PCB land pattern matches the documented 2.9 × 1.6 mm footprint.
How does the −3.5 to 0.0 mV/K temperature coefficient affect circuit performance?
This coefficient indicates VZ decreases by up to 3.5 mV per °C rise near 2.4–4.7 V range. At 3.3 V nominal, worst-case drift is ~0.35 V over 100 °C span - acceptable for non-precision references but requires compensation in high-accuracy analog systems using this diode.
BZT52H-A3V3-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):
- 3.3 V
- Tolerance:
- ±1.21%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-A3V3-QX FAQ
1.How can I place an order for BZT52H-A3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A3V3-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-A3V3-QX reliable?
The price and inventory of BZT52H-A3V3-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-A3V3-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A3V3-QX?
BZT52H-A3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A3V3-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-A3V3-QX?
For technical support, including BZT52H-A3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A3V3-QX requirements.
6.How does Aetrix verify that BZT52H-A3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A3V3-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-A3V3-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A3V3-QX?
All BZT52H-A3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A3V3-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-A3V3-QX part is unused and in its original packaging.
Return procedure for BZT52H-A3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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