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

Nexperia USA Inc. BZT52H-C8V2-QX

Name: BZT52H-C8V2-QX
Brand: Nexperia USA Inc.
SKU: BZT52H-C8V2-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT52H-C8V2-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123F

Datasheet:: BZT52H-C8V2-QX.pdf

Description:: DIODE ZENER 8.2V 375MW SOD123F

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Product details

Overview

BZT52H-C8V2-QX from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 8.2 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-C8V2-QX datasheet, BZT52H-C8V2-QX pinout, BZT52H-C8V2-QX application, or BZT52H-C8V2-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, differential resistance (80 Ω), temperature coefficient (+3.2 to +6.2 mV/K), and automotive-grade reliability context - all critical for precision biasing, overvoltage clamping, and ECU reference design.

Technical Context

This Zener diode operates in reverse breakdown with a specified V_Z = 7.7–8.7 V at I_Z = 5 mA, exhibiting low differential resistance (r_dif ≤ 80 Ω) and a positive temperature coefficient (+3.2 to +6.2 mV/K) optimized for stable voltage reference in ambient ranges from −65 °C to +150 °C.

Its thermal design supports junction-to-ambient R_th(j-a) = 330 K/W (free air), R_th(j-sp) = 150 K/W (solder point), and maximum non-repetitive peak reverse current I_ZSM = 4.0 A (100 μs pulse), enabling robust transient suppression in automotive power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
V_Z (Nominal)	8.2 V - precise DC reference voltage at 5 mA test current, ±5 % tolerance band (7.7–8.7 V)
P_tot	830 mW - maximum continuous power dissipation on FR4 PCB with 1 cm² cathode pad, defining thermal derating limits
r_dif	≤ 80 Ω - low dynamic impedance ensures minimal output voltage variation under load current changes
S_Z	+3.2 to +6.2 mV/K - positive temperature coefficient enables predictable drift compensation in wide-temperature systems
I_R @ V_R = 6.6 V	≤ 0.7 μA - ultra-low reverse leakage at 80 % of V_Z, critical for low-power bias networks
C_d	150 pF - junction capacitance at 0 V, relevant for high-frequency noise filtering and transient response
I_ZSM	4.0 A - non-repetitive surge capability (100 μs pulse), supporting ISO 7637-2 transient protection roles

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; polarity-sensitive terminal where reverse bias is applied to achieve Zener conduction
2	Anode (A)	Connected to ground or lower-potential rail; completes reverse-biased path for voltage reference or clamping function

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive use per stress test standard, enabling deployment in engine control, body electronics, and ADAS modules
±5 % V_Z tolerance	Tighter than generic Zeners, reducing binning needs and simplifying reference design margining for 8.2 V systems
830 mW power rating	Enables higher-current regulation (up to ~100 mA at 8.2 V) without external heatsinking on standard FR4 PCBs
Low r_dif (≤ 80 Ω)	Maintains < ±0.1 V output shift across 1–10 mA load range, improving stability in sensor bias and ADC reference circuits
Positive S_Z	Compensates for negative TC of other components (e.g., op-amps), facilitating temperature-stable analog subsystems

Applications

Engine Control Unit (ECU) Reference

Infotainment Power Rail Clamp

Use Scenario: Providing stable 8.2 V reference for microcontroller ADC and analog front-end circuitry in gasoline/diesel engine control modules.

IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to fix reference potential against battery voltage fluctuations.

Use Value: ±5 % V_Z tolerance and +3.2 to +6.2 mV/K temperature coefficient enable < ±1.5 % reference accuracy over −40 to +125 °C ambient.

Use Scenario: Clamping 12 V infotainment system supply rail during load-dump transients (ISO 7637-2 Pulse 5a).

IC Role / Device Role / Timing Role: Overvoltage protection device shunting excess energy to ground when rail exceeds 8.2 V + forward drop.

Use Value: 4.0 A non-repetitive peak reverse current rating absorbs 40 W surges (100 μs), preventing downstream regulator failure.

Automotive Lighting Bias Network

Body Control Module (BCM) Voltage Monitor

Use Scenario: Generating bias voltage for LED driver IC feedback loops in adaptive headlamp systems.

IC Role / Device Role / Timing Role: Precision Zener element establishing regulated node for current-sense amplifier reference in constant-current LED control.

Use Value: 80 Ω differential resistance ensures < 0.1 V error across 5–15 mA sense current variations, preserving LED brightness linearity.

Use Scenario: Monitoring 12 V battery voltage via resistor divider with Zener-clamped input to MCU GPIO.

IC Role / Device Role / Timing Role: Input protection and level-setting diode limiting divider output to safe 8.2 V max before ADC sampling.

Use Value: 0.7 μA reverse leakage at 6.6 V minimizes divider current error, maintaining < 0.5 % measurement accuracy at 12 V nominal.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZT52H-B8V2-Q	±2 % V_Z tolerance (7.9–8.4 V), lower r_dif (≤ 60 Ω), same SOD123F package and AEC-Q101 qualification	Better regulation accuracy and lower impedance, but tighter tolerance increases cost and may require layout revalidation	Select when reference stability over temperature and load is prioritized over cost and availability
MMBZ5231BS-7-F	±5 % V_Z (8.2 V), 350 mW P_tot, SOT-23 package, AEC-Q101 qualified, higher r_dif (150 Ω)	Lower power handling and higher impedance limit use to low-current (< 20 mA) biasing; smaller footprint saves board space	Select for space-constrained designs where 350 mW rating suffices and SOT-23 placement is preferred

Compared with BZT52H-C8V2-QX, BZT52H-B8V2-Q offers tighter regulation at higher cost, while MMBZ5231BS-7-F trades power and impedance performance for compactness - choice depends on whether thermal margin, accuracy, or board area dominates the design constraint.

Availability

BZT52H-C8V2-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, infotainment rail clamping, and BCM voltage monitoring requiring stable component supply with AEC-Q101 compliance and long-term production continuity.

Supply support for BZT52H-C8V2-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 product line, engineered specifically for automotive voltage reference, regulation, and transient protection in harsh-environment electronic control units.

FAQ

What is the maximum continuous reverse current this Zener can sustain at 8.2 V?

The BZT52H-C8V2-QX is not rated for continuous reverse current at V_Z; its operation relies on series resistance to limit I_Z. At 8.2 V, sustained current is constrained by P_tot = 830 mW, yielding a theoretical max I_Z ≈ 101 mA (830 mW ÷ 8.2 V). Derating is required above Tamb = 25 °C per R_th(j-a) = 330 K/W.

How does the +3.2 to +6.2 mV/K temperature coefficient affect circuit accuracy over −40 °C to +125 °C?

Over that 165 K range, V_Z shifts +0.53 to +1.02 V (3.2 × 165 to 6.2 × 165 mV), resulting in a final V_Z span of 8.23–9.22 V. This is factored into automotive reference designs using complementary TC components or calibration offsets to hold system-level accuracy within spec.

Can this diode replace a 1N4738A in an existing design?

No - the 1N4738A is a 8.2 V, 1 W through-hole Zener in DO-41 package. While V_Z matches, BZT52H-C8V2-QX has lower P_tot (830 mW vs. 1000 mW), SOD123F footprint (not pin-compatible), and different thermal behavior. Direct replacement requires PCB redesign and power derating validation.

Is the 4.0 A I_ZSM rating usable for repetitive 100 μs pulses?

No - I_ZSM = 4.0 A is strictly for non-repetitive pulses (tp = 100 μs, Tj = 25 °C prior to surge). Repetitive operation must stay within P_tot = 830 mW average power limit; allowable repetitive peak current depends on duty cycle and thermal mass, requiring transient thermal simulation per JEDEC JESD51-14.

BZT52H-C8V2-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):: 8.2 V

Tolerance:: ±6.1%

Power - Max:: 375 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 700 nA @ 5 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-C8V2-QX FAQ

1.How can I place an order for BZT52H-C8V2-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52H-C8V2-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-C8V2-QX reliable?

The price and inventory of BZT52H-C8V2-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-C8V2-QX is usually 5 days.

3.What payment methods are accepted for BZT52H-C8V2-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-C8V2-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52H-C8V2-QX?

BZT52H-C8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52H-C8V2-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-C8V2-QX?

For technical support, including BZT52H-C8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-C8V2-QX requirements.

6.How does Aetrix verify that BZT52H-C8V2-QX is sourced from the original manufacturer or authorized distributors?

All BZT52H-C8V2-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-C8V2-QX meets industry standards.

7.What is the process for return or replacement of BZT52H-C8V2-QX?

All BZT52H-C8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-C8V2-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-C8V2-QX part is unused and in its original packaging.

Return procedure for BZT52H-C8V2-QX:

1.Submit a request within 90 days.

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

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