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

Nexperia USA Inc. BZT52H-C5V1-QX

Name: BZT52H-C5V1-QX
Brand: Nexperia USA Inc.
SKU: BZT52H-C5V1-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52H-C5V1-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123F

Datasheet:: BZT52H-C5V1-QX.pdf

Description:: DIODE ZENER 5.1V 375MW SOD123F

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Inventory:100

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Product details

Overview

BZT52H-C5V1-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 5.1 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-C5V1-QX datasheet, BZT52H-C5V1-QX pinout, BZT52H-C5V1-QX application, or BZT52H-C5V1-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, reverse current limits, temperature coefficient behavior, and automotive-grade reliability context - all confirmed from Nexperia's official product data sheet Rev. 1 (October 2021).

Technical Context

This Zener diode operates in reverse-bias breakdown mode with a specified V_Z = 4.80–5.40 V at I_Z = 5 mA, differential resistance r_dif ≤ 480 Ω, and temperature coefficient S_Z = −2.7 to +1.2 mV/K. It exhibits low reverse leakage (I_R ≤ 2 μA at V_R = 3 V) and supports non-repetitive surge currents up to 6.0 A (t_p = 100 μs).

Designed for stable voltage reference and overvoltage clamping, it features a cathode-anode terminal structure in SOD123F, with thermal resistance R_th(j-a) = 330 K/W (free air) and R_th(j-sp) = 70 K/W (to cathode solder point), enabling reliable operation up to T_j = 150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.80–5.40 V at I_Z = 5 mA - defines precise clamping threshold for 5.1 V nominal regulation
Tolerance	±5 % - enables cost-optimized selection where tight voltage accuracy is not critical
Power Dissipation (P_tot)	830 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Differential Resistance (r_dif)	≤ 480 Ω - determines output impedance and load regulation sensitivity in shunt regulator circuits
Reverse Current (I_R)	≤ 2 μA at V_R = 3 V - ensures minimal quiescent power loss in standby or low-current bias networks
Temperature Coefficient (S_Z)	−2.7 to +1.2 mV/K - quantifies V_Z drift across operating temperature range
Non-repetitive Peak Current (I_ZSM)	6.0 A (t_p = 100 μs) - supports transient overvoltage suppression without device failure

Pinout & Package

SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline (3.6 × 1.6 mm footprint); cathode marked by bar on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; polarity-sensitive terminal for reverse-bias operation
2	Anode (A)	Connected to ground or lower-potential rail; completes Zener conduction path during breakdown

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive underhood and infotainment systems requiring robust reliability
830 mW power rating	Enables higher-current shunt regulation than standard 500 mW Zeners in same footprint
±5 % voltage tolerance	Provides cost-effective alternative to tighter-tolerance variants while maintaining functional stability
SOD123F package	Offers 30 % smaller board area vs. SOD123 and improved thermal performance via enhanced cathode pad
Low thermal resistance (R_th(j-sp) = 70 K/W)	Supports sustained operation near max power with minimal junction temperature rise when properly mounted

Applications

Automotive ECU Power Rail Clamping

Industrial Sensor Reference Voltage

Use Scenario: Protecting microcontroller supply rails against load dump transients in 12 V vehicle systems.

IC Role / Device Role / Timing Role: Shunt clamping element placed between V_CC and GND to clamp surges above 5.1 V.

Use Value: Limits peak rail voltage to safe levels using its 6.0 A non-repetitive surge capability and AEC-Q101 qualification.

Use Scenario: Providing stable 5.1 V reference for analog-to-digital conversion in factory-floor pressure sensors.

IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and signal conditioning circuitry.

Use Value: Delivers <2 μA reverse leakage and −2.7 to +1.2 mV/K temperature coefficient for repeatable measurement accuracy.

Consumer Power Adapter Feedback

Telecom Line Interface Protection

Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C chargers.

IC Role / Device Role / Timing Role: Zener-based feedback node tied to optocoupler input to regulate output voltage.

Use Value: Maintains regulation stability with 480 Ω differential resistance and 830 mW power headroom under full-load conditions.

Use Scenario: Overvoltage protection on RS-485 transceiver data lines exposed to ESD and lightning-induced surges.

IC Role / Device Role / Timing Role: Low-capacitance (300 pF) clamping diode connected between line and ground.

Use Value: Limits transient voltages to <5.4 V while adding negligible signal distortion due to minimal junction capacitance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZT52H-B5V1-Q	±2 % tolerance (V_Z = 5.00–5.20 V), lower r_dif (≤ 60 Ω)	Better regulation accuracy and lower dynamic impedance for precision references	Select when tighter voltage control and improved load regulation outweigh cost premium
BZX384-C5V1	SOD323 package, 300 mW P_tot, ±5 %, V_Z = 4.8–5.4 V	Smaller footprint but lower power handling; unsuitable for >300 mW continuous use	Choose only for space-constrained designs with low-power biasing requirements

Compared with BZT52H-C5V1-QX, the BZT52H-B5V1-Q offers superior voltage stability at higher cost, while the BZX384-C5V1 trades power capability for miniaturization - making the C-grade variant optimal for cost-sensitive, medium-power automotive and industrial clamping where ±5 % tolerance is acceptable.

Availability

BZT52H-C5V1-QX is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor reference circuits, consumer power adapter feedback loops, and telecom line interface protection requiring stable component supply and AEC-Q101 compliance.

Supply support for BZT52H-C5V1-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 portfolio, engineered specifically for voltage regulation, reference, and clamping in harsh-environment automotive and industrial applications.

FAQ

What is the maximum continuous forward current for BZT52H-C5V1-QX?

The device is not rated for continuous forward conduction; its absolute maximum forward current is 250 mA per limiting values table, but it is intended for reverse-bias Zener operation only. Forward voltage is specified at 10 mA (V_F ≤ 0.9 V), and sustained forward bias risks thermal overstress due to lack of forward power rating.

Can BZT52H-C5V1-QX replace a 5.1 V Zener with ±1 % tolerance in an automotive design?

No - the ±5 % tolerance (4.80–5.40 V) introduces wider voltage variation than ±1 % (5.04–5.16 V), potentially affecting regulation margin in safety-critical circuits. Use BZT52H-A5V1-Q (±1 %) or BZT52H-B5V1-Q (±2 %) if tighter tolerance is required; the C-grade is optimized for cost-driven, non-critical clamping roles.

How does the SOD123F package improve thermal performance over standard SOD123?

The SOD123F features an enlarged cathode pad (1 cm² mounting area) that reduces junction-to-solder-point thermal resistance to 70 K/W - 30 % lower than typical SOD123 - enabling higher sustained power dissipation and improved reliability in thermally constrained automotive PCB layouts.

Is BZT52H-C5V1-QX suitable for ESD protection in USB interfaces?

No - while it provides overvoltage clamping, its 300 pF junction capacitance and 6.0 A surge rating are mismatched for high-speed USB 2.0/3.0 ESD protection, which requires sub-1 pF capacitance and IEC 61000-4-2 compliance. Use dedicated low-capacitance TVS diodes like PESD5V0S1BA instead.

BZT52H-C5V1-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):: 5.1 V

Tolerance:: ±5.88%

Power - Max:: 375 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 2 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-C5V1-QX FAQ

1.How can I place an order for BZT52H-C5V1-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52H-C5V1-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-C5V1-QX reliable?

The price and inventory of BZT52H-C5V1-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-C5V1-QX is usually 5 days.

3.What payment methods are accepted for BZT52H-C5V1-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C5V1-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52H-C5V1-QX?

BZT52H-C5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52H-C5V1-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-C5V1-QX?

For technical support, including BZT52H-C5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C5V1-QX requirements.

6.How does Aetrix verify that BZT52H-C5V1-QX is sourced from the original manufacturer or authorized distributors?

All BZT52H-C5V1-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-C5V1-QX meets industry standards.

7.What is the process for return or replacement of BZT52H-C5V1-QX?

All BZT52H-C5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C5V1-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-C5V1-QX part is unused and in its original packaging.

Return procedure for BZT52H-C5V1-QX:

1.Submit a request within 90 days.

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

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