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Nexperia USA Inc. BZT52H-B3V3-QX
- Part No.:
- BZT52H-B3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,405
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Product details
Overview
BZT52H-B3V3-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 3.3 V nominal breakdown voltage at 5 mA, with 830 mW total power dissipation and AEC-Q101 qualification for automotive voltage regulation.
For engineers reviewing the BZT52H-B3V3-QX datasheet, BZT52H-B3V3-QX pinout, BZT52H-B3V3-QX application, or BZT52H-B3V3-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, reverse current limits, differential resistance, and temperature coefficient data critical for precision biasing and overvoltage protection design.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse bias above its specified Zener voltage (3.3 V ±2 %) with low dynamic impedance (95 Ω max at IZ = 5 mA) and minimal temperature drift (−3.5 to 0.0 mV/K). It maintains stable regulation under ambient temperatures from −65 °C to +150 °C.
Its SOD123F package enables surface-mount integration with 150 K/W junction-to-solder-point thermal resistance and 70 K/W junction-to-cathode-tab resistance, supporting reliable power dissipation up to 830 mW on standard FR4 PCBs with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.23 V to 3.37 V at IZ = 5 mA - defines precise clamping threshold for low-voltage rail stabilization |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming in automotive sensor supply circuits |
| Differential Resistance (rdif) | ≤ 95 Ω at IZ = 5 mA - minimizes output voltage variation under load current changes |
| Reverse Current (IR) | ≤ 5 μA at VR = 1 V - guarantees low leakage in standby mode for battery-powered modules |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous regulation in compact automotive ECUs with limited heatsinking |
| Temperature Coefficient (SZ) | −3.5 to 0.0 mV/K - enables predictable voltage drift compensation across −40 °C to +125 °C operating range |
| Junction Temperature (Tj) | 150 °C maximum - allows operation in under-hood environments without derating below full power |
Pinout & Package
SOD123F surface-mount plastic package: 2-pin, flat lead, cathode-marked with bar; dimensions 3.6 mm × 1.7 mm × 1.0 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; reverse-biased configuration enables Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD testing per discrete semiconductor stress standards |
| Three tolerance grades | ±1 %, ±2 %, and ≈±5 % options enable cost-performance trade-off selection without redesigning PCB layout |
| Low thermal resistance | Rth(j-sp) = 150 K/W and Rth(j-tab) = 70 K/W allow efficient heat transfer to PCB copper, reducing thermal runaway risk |
| Wide voltage range | 2.4 V to 75 V coverage across 37 nominal voltages simplifies BOM consolidation for multi-rail systems |
| Pulse surge capability | 40 W non-repetitive peak reverse power (tp = 100 μs) provides transient overvoltage immunity during load dump events |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Providing stable 3.3 V reference for analog front-end of engine knock sensors in powertrain control units. IC Role / Device Role / Timing Role: Zener diode acts as shunt regulator, clamping sensor supply rail against alternator ripple and load-dump transients. Use Value: ±2 % tolerance and −3.5 mV/K temperature coefficient ensure <±15 mV total drift across −40 °C to +125 °C, preserving ADC accuracy. |
Use Scenario: Protecting USB 2.0 data lines and VBUS monitor circuitry from ESD and short-duration surges. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, leveraging low capacitance (450 pF) and fast response. Use Value: 5 μA reverse leakage at 1 V ensures negligible standby current draw while maintaining fast turn-on for 8 kV HBM ESD events. |
| Industrial PLC Input Conditioning | Low-Power IoT Node Voltage Reference |
Use Scenario: Regulating 3.3 V supply for optocoupler input stages in programmable logic controller digital input modules. IC Role / Device Role / Timing Role: Shunt regulator stabilizing isolated 5 V-to-3.3 V LDO input, absorbing transient energy from field wiring. Use Value: 830 mW power rating and 150 °C max junction temperature support continuous operation in enclosed cabinets up to 70 °C ambient. |
Use Scenario: Generating precise 3.3 V bias for ultra-low-power microcontroller reset circuitry in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Passive voltage reference enabling brown-out detection with minimal quiescent current consumption. Use Value: 0.9 V forward voltage at 10 mA and 5 μA reverse leakage preserve battery life over multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-A3V3-Q | ±1 % tolerance, higher cost, identical package and thermal specs | Required where tighter voltage accuracy is mandated for high-resolution ADC references | Select when system-level calibration budget cannot absorb ±2 % Zener error |
| BZT52H-C3V3-Q | ≈±5 % tolerance, lower cost, same power and thermal ratings | Suitable for non-critical biasing where cost sensitivity outweighs regulation precision | Choose for consumer-grade peripherals where ±5 % VZ meets functional safety thresholds |
Compared with BZT52H-B3V3-QX, the ±1 % A-grade offers superior accuracy for metrology-critical paths, while the ±5 % C-grade reduces BOM cost in tolerant applications-both retain identical surge handling, thermal performance, and footprint compatibility.
Availability
BZT52H-B3V3-QX is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC input stages, USB interface protection circuits, and low-power IoT node voltage references requiring stable component supply with AEC-Q101 compliance.
Supply support for BZT52H-B3V3-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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The BZT52H-Q series targets automotive and industrial voltage regulation needs, delivering AEC-Q101-compliant Zener diodes with tight tolerances, robust surge capability, and thermally optimized SMD packaging.
FAQ
What is the maximum reverse current at 1 V for BZT52H-B3V3-QX?
The maximum reverse current (IR) is 5 μA at VR = 1 V and Tj = 25 °C, measured under specified test conditions. This low leakage supports energy-efficient operation in always-on automotive subsystems and extends battery life in portable devices.
Can BZT52H-B3V3-QX be used in place of a 3.3 V linear regulator?
No-it functions only as a shunt regulator requiring a series current-limiting resistor and cannot source load current like a three-terminal linear regulator. It is appropriate for low-current biasing or voltage clamping, not for powering downstream ICs directly.
How does the SOD123F package affect thermal performance?
The SOD123F package achieves Rth(j-sp) = 150 K/W and Rth(j-tab) = 70 K/W when mounted on FR4 with 1 cm² cathode pad, enabling 830 mW dissipation at 25 °C ambient. Thermal derating is required above 25 °C per the datasheet's power vs. temperature curve.
Is BZT52H-B3V3-QX suitable for ESD protection on high-speed data lines?
With 450 pF capacitance at 0 V and 6.0 A non-repetitive peak reverse current, it is suitable for low-speed or DC-coupled protection but not for USB 2.0/3.0 or HDMI due to excessive signal distortion; TVS diodes with sub-1 pF capacitance are preferred for those interfaces.
BZT52H-B3V3-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:
- ±2.12%
- 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-B3V3-QX FAQ
1.How can I place an order for BZT52H-B3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B3V3-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-B3V3-QX reliable?
The price and inventory of BZT52H-B3V3-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-B3V3-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B3V3-QX?
BZT52H-B3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B3V3-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-B3V3-QX?
For technical support, including BZT52H-B3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B3V3-QX requirements.
6.How does Aetrix verify that BZT52H-B3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B3V3-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-B3V3-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B3V3-QX?
All BZT52H-B3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B3V3-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-B3V3-QX part is unused and in its original packaging.
Return procedure for BZT52H-B3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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