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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZT52H-C3V3-QX

Name: BZT52H-C3V3-QX
Brand: Nexperia USA Inc.
SKU: BZT52H-C3V3-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52H-C3V3-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123F

Datasheet:: BZT52H-C3V3-QX.pdf

Description:: DIODE ZENER 3.3V 375MW SOD123F

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Inventory:6,473

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Product details

Overview

BZT52H-C3V3-QX from Nexperia is a ±5 % 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-C3V3-QX datasheet, BZT52H-C3V3-QX pinout, BZT52H-C3V3-QX application, or BZT52H-C3V3-QX equivalent, this part delivers stable 3.3 V regulation with low differential resistance (95 Ω), tight thermal coefficient control (−3.5 to 0.0 mV/K), and robust surge capability (6.0 A non-repetitive peak reverse current) in a compact surface-mount footprint.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain a stable 3.3 V reference across load variations, with specified test conditions of I_Z = 5 mA and T_j = 25 °C. Its differential resistance of 95 Ω ensures minimal output voltage deviation under dynamic current changes.

The device exhibits a temperature coefficient ranging from −3.5 mV/K to 0.0 mV/K at I_Z = 5 mA, enabling predictable drift behavior in automotive ambient ranges (−65 °C to +150 °C). It is mounted on FR4 PCB with single-sided copper and tin-plated pads per JEDEC standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakdown Voltage V_Z	3.10 V to 3.50 V at I_Z = 5 mA - defines usable regulation window for 3.3 V rail stabilization
Differential Resistance r_dif	95 Ω max - limits output voltage shift under ±1 mA load current variation
Reverse Current I_R	5 μA max at V_R = 1 V - ensures low quiescent leakage in standby circuits
Total Power Dissipation P_tot	830 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 pad
Non-repetitive Peak Reverse Current I_ZSM	6.0 A for t_p = 100 μs - supports transient overvoltage clamping without failure
Junction Temperature Range	−65 °C to +150 °C - enables operation in under-hood automotive environments
AEC-Q101 Qualified	Yes - validated for automotive-grade reliability including temperature cycling and HTRB

Pinout & Package

SOD123F plastic surface-mount package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 1.0–1.2 mm height; cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; polarity marker determines forward conduction direction and Zener bias orientation
2	Anode (A)	Connected to ground or lower-potential rail; completes reverse-bias path for regulation operation

Key Features

Feature	Design Value
±5 % V_Z tolerance	Enables cost-optimized 3.3 V reference design where tighter tolerance is not required
AEC-Q101 qualification	Validates suitability for automotive body control modules, sensor interfaces, and infotainment power rails
830 mW power rating	Supports higher-current regulation than standard 500 mW Zeners without derating at 25 °C
Low 95 Ω differential resistance	Reduces output voltage variation to < ±95 mV per ±1 mA load step change
SOD123F footprint	Enables high-density PCB layout with standardized reflow-compatible solder land pattern (2.8 × 1.6 mm)

Applications

Automotive Sensor Reference

Industrial Power Monitor

Use Scenario: Providing stable 3.3 V reference for analog-to-digital conversion in engine coolant temperature sensors.

IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and biasing.

Use Value: Maintains measurement accuracy across −40 °C to +125 °C ambient with < ±0.5 % V_Z drift over temperature.

Use Scenario: Regulating auxiliary supply for microcontroller-based voltage monitoring in PLC I/O modules.

IC Role / Device Role / Timing Role: Shunt regulator establishing clean 3.3 V rail for MCU V_REF and internal LDO input.

Use Value: Delivers 830 mW continuous dissipation margin while surviving 6.0 A surge transients on 24 V industrial bus lines.

Consumer USB-C PD Feedback

Medical Low-Power Bias

Use Scenario: Setting feedback threshold in secondary-side voltage regulation for USB-C power delivery adapters.

IC Role / Device Role / Timing Role: Precision shunt element in optocoupler feedback loop for isolated 3.3 V output.

Use Value: Achieves ±5 % initial accuracy and < 95 Ω impedance to minimize loop gain error and improve transient response.

Use Scenario: Generating stable bias voltage for low-noise instrumentation amplifiers in portable ECG front-ends.

IC Role / Device Role / Timing Role: Low-leakage (5 μA max at 1 V) voltage reference source for amplifier offset trimming.

Use Value: Ensures < 1 μV/°C effective drift contribution and negligible standby current draw in battery-powered devices.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZT52C3V3	Same 3.3 V nominal, ±5 % tolerance, but not AEC-Q101 qualified; 500 mW P_tot	Limited to commercial-grade consumer or industrial equipment without automotive qualification requirements	Select when AEC-Q101 is unnecessary and lower power rating suffices
MMSZ5226ET1G	3.3 V nominal, ±5 %, SOD-123 package, 500 mW P_tot, no AEC-Q101 claim	Compatible footprint but lacks automotive stress-test validation and thermal performance data at 150 °C junction	Choose only for non-automotive designs where Nexperia's 830 mW rating and full AEC-Q101 report are not required

Compared with BZT52C3V3 and MMSZ5226ET1G, the BZT52H-C3V3-QX provides 66 % higher power handling, verified automotive qualification, and documented 150 °C junction operation-making it the sole option for thermally demanding or safety-critical vehicle subsystems.

Availability

BZT52H-C3V3-QX is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power monitors, USB-C PD feedback circuits, and medical low-power bias applications requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52H-C3V3-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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for stable voltage reference and regulation in harsh automotive and industrial environments.

FAQ

What is the maximum continuous reverse current the BZT52H-C3V3-QX can sustain at 25 °C ambient?

The device is rated for 830 mW total power dissipation at T_amb ≤ 25 °C. With a nominal 3.3 V breakdown, this corresponds to a maximum continuous reverse current of approximately 251 mA (830 mW ÷ 3.3 V), assuming ideal thermal conditions and no derating. Actual design current must respect thermal resistance limits and board layout.

How does the −3.5 mV/K to 0.0 mV/K temperature coefficient affect regulation accuracy over automotive temperature range?

Over −40 °C to +125 °C, the worst-case V_Z drift is (125 − (−40)) × 3.5 mV/K = 577.5 mV, or ~17.5 % of 3.3 V. However, typical behavior near zero coefficient reduces actual drift significantly; datasheet plots show < ±2 % total variation across full range for C-tolerance parts under defined test conditions.

Can BZT52H-C3V3-QX replace BZT52C3V3 in an existing design without layout changes?

Yes-the SOD123F package matches the SOD-123 outline used by BZT52C3V3, with identical pinning (cathode/anode), mechanical dimensions, and reflow footprint. No PCB modification is needed, though thermal and surge performance improvements may require updated system-level validation.

Is the 6.0 A non-repetitive peak reverse current rating tested per JEDEC standards?

Yes-IZSM = 6.0 A is measured under JEDEC-defined conditions: t_p = 100 μs square wave, T_j = 25 °C prior to surge, and specified mounting on FR4 PCB with single-sided copper. This validates its capability to clamp short-duration transients such as ISO 7637-2 pulse 1 and pulse 2a in automotive systems.

BZT52H-C3V3-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:: ±6.06%

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-C3V3-QX FAQ

1.How can I place an order for BZT52H-C3V3-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52H-C3V3-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-C3V3-QX reliable?

The price and inventory of BZT52H-C3V3-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-C3V3-QX is usually 5 days.

3.What payment methods are accepted for BZT52H-C3V3-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C3V3-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52H-C3V3-QX?

BZT52H-C3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52H-C3V3-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-C3V3-QX?

For technical support, including BZT52H-C3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C3V3-QX requirements.

6.How does Aetrix verify that BZT52H-C3V3-QX is sourced from the original manufacturer or authorized distributors?

All BZT52H-C3V3-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-C3V3-QX meets industry standards.

7.What is the process for return or replacement of BZT52H-C3V3-QX?

All BZT52H-C3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C3V3-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-C3V3-QX part is unused and in its original packaging.

Return procedure for BZT52H-C3V3-QX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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