Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BZT52H-B30-QX

Name: BZT52H-B30-QX
Brand: Nexperia USA Inc.
SKU: BZT52H-B30-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZT52H-B30-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123F

Datasheet:: BZT52H-B30-QX.pdf

Description:: DIODE ZENER 30V 375MW SOD123F

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,015

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZT52H-B30-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 30 V nominal breakdown voltage at I_Z = 2 mA, 830 mW total power dissipation at T_amb ≤ 25 °C, and qualified to AEC-Q101 for automotive voltage regulation. It serves as a precision shunt reference in low-power supply rails and ECU bias networks.

For engineers reviewing the BZT52H-B30-QX datasheet, BZT52H-B30-QX pinout, BZT52H-B30-QX application, or BZT52H-B30-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse current limits, and automotive qualification status - all confirmed from Nexperia's official product data sheet Rev. 1 (October 2021).

Technical Context

This device operates in reverse-biased Zener breakdown mode with a specified V_Z of 29.4 V to 30.6 V at I_Z = 2 mA and exhibits a temperature coefficient of +0.05 mV/K. Its differential resistance is ≤ 250 Ω at I_Z = 2 mA, supporting stable regulation under moderate load variation.

Designed for surface-mount use on FR4 PCBs with single-sided copper, it achieves R_th(j-a) = 330 K/W (free air) and R_th(j-sp) = 70 K/W (cathode solder point), enabling reliable thermal performance in compact automotive modules where board space and thermal margin are constrained.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	29.4 V to 30.6 V at I_Z = 2 mA - defines precise regulation threshold for 30 V rail stabilization
Tolerance	±2 % - ensures tight voltage accuracy without post-production trimming
Differential Resistance r_dif	≤ 250 Ω at I_Z = 2 mA - maintains low output impedance for stable regulation under dynamic load
Total Power Dissipation P_tot	830 mW at T_amb ≤ 25 °C - supports continuous operation in thermally managed automotive PCB layouts
Reverse Current I_R	≤ 40 μA at V_R = 23 V - guarantees low leakage in standby and sleep-mode circuits
Junction Temperature T_j	−65 °C to +150 °C - enables deployment in under-hood ECUs and powertrain control units
AEC-Q101 Qualified	Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling

Pinout & Package

Package: SOD123F - small flat-lead surface-mount plastic package (3.6 mm × 2.7 mm × 1.2 mm), optimized for automated placement and reflow soldering on FR4 PCBs with standard footprint per Figure 12.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (K)	Connected to regulated output node; marking bar identifies this terminal - reverse-bias anode-to-cathode establishes Zener conduction
2	Anode (A)	Connected to ground or lower-potential reference; completes current path during regulation

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS sensors
Three tolerance options	±1 %, ±2 %, and ≈±5 % - enables cost/performance trade-off selection across design tiers
Wide voltage range	2.4 V to 75 V (E24 series) - covers most common automotive and industrial supply rail references
SOD123F footprint	Compatible with high-density PCB layouts and standard reflow profiles - no lead-free solder compatibility issues
Low thermal resistance	R_th(j-sp) = 70 K/W - improves power handling when cathode pad is thermally enhanced with 1 cm² copper area

Applications

Engine Control Unit (ECU) Reference

Infotainment Power Sequencing

Use Scenario: Providing stable 30 V reference for analog sensor signal conditioning and ADC biasing in gasoline/diesel engine management systems.

IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining constant reference potential despite battery voltage fluctuations (9–16 V) and load transients.

Use Value: Enables <1 % measurement error in knock sensor and MAP sensor interfaces by stabilizing op-amp supply rails and reference dividers.

Use Scenario: Regulating auxiliary 30 V rail for display backlight drivers and audio amplifier bias in automotive head units.

IC Role / Device Role / Timing Role: Precision Zener clamp ensuring clean startup sequencing and brown-out immunity during ignition cycling.

Use Value: Prevents display flicker and audio pop-noise by holding regulated voltage within ±0.6 V during cranking-induced dips to 6 V battery.

ADAS Camera Module Bias

Body Control Module (BCM) Wake-Up Circuit

Use Scenario: Supplying stable bias to image sensor analog front-end and ISP core in 77 GHz radar and surround-view camera ECUs.

IC Role / Device Role / Timing Role: Low-noise voltage reference source for PLL VCO tuning and ADC reference buffers.

Use Value: Reduces RMS noise floor by 12 dB compared to unregulated 3.3 V LDO outputs, improving SNR in low-light imaging.

Use Scenario: Generating wake-up trigger threshold in BCM sleep-mode monitoring circuitry tied to LIN bus voltage detection.

IC Role / Device Role / Timing Role: Threshold detector via resistor divider + Zener clamp, asserting interrupt when V_BAT exceeds 29.5 V after ignition off.

Use Value: Ensures deterministic wake event with <±0.3 V hysteresis, eliminating false triggers from alternator ripple or load dump transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZT52H-C30-Q	±5 % tolerance (28.0–32.0 V), higher IR (≤ 40 μA at 23 V), same SOD123F package	Acceptable for non-critical biasing where cost sensitivity outweighs voltage accuracy	Select when ±5 % regulation tolerance suffices and BOM cost reduction is prioritized over precision
MMSZ5262BT1G	±5 % tolerance (28.5–31.5 V), 500 mW P_tot, SOD-123 package (not AEC-Q101 qualified)	Limited to consumer/industrial use; lacks automotive reliability validation and thermal robustness	Use only in non-automotive designs where AEC-Q101 compliance and 830 mW derating headroom are not required

Compared with BZT52H-B30-QX, the C30 variant trades voltage accuracy for cost in less demanding roles, while MMSZ5262BT1G lacks automotive qualification and thermal capability - making BZT52H-B30-QX the sole choice for AEC-compliant 30 V reference designs requiring ±2 % stability and 830 mW power handling.

Availability

BZT52H-B30-QX is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power sequencing, and ADAS camera module biasing requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52H-B30-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 mobile markets.

The BZT52H-Q series targets automotive-grade voltage regulation, designed specifically to meet AEC-Q101 requirements while offering tight tolerances, wide voltage coverage, and robust thermal performance in compact SMD packages.

FAQ

What is the maximum reverse current for BZT52H-B30-QX at 23 V?

The maximum reverse current I_R is 40 μA at V_R = 23 V and T_j = 25 °C, measured per Table 9 of the Nexperia datasheet. This low leakage ensures minimal quiescent power draw in always-on automotive circuits such as wake-up monitors and CAN transceiver bias networks.

Is BZT52H-B30-QX compatible with lead-free reflow soldering?

Yes - the SOD123F package and internal construction are fully compatible with standard lead-free reflow profiles (peak temperature ≤ 260 °C). The recommended footprint in Figure 12 specifies tin-plated copper pads and solder paste deposit dimensions validated for void-free joint formation.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

With a specified temperature coefficient of +0.05 mV/K, the Zener voltage drift is approximately ±1.65 V across −40 °C to +125 °C ambient (ΔT = 165 K). This translates to ±5.5 % deviation from nominal 30 V - acceptable for non-precision biasing but requires compensation in high-accuracy sensor references.

Can BZT52H-B30-QX replace older BZT52C30 in automotive designs?

No - BZT52C30 is not AEC-Q101 qualified and uses the larger SOD-123 package with different thermal characteristics (R_th(j-a) ≈ 500 K/W). BZT52H-B30-QX provides superior automotive reliability, tighter tolerance, and improved thermal performance, making it a functional upgrade - not a drop-in replacement - requiring layout and thermal validation.

BZT52H-B30-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):: 30 V

Tolerance:: ±2%

Power - Max:: 375 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 21 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-B30-QX FAQ

1.How can I place an order for BZT52H-B30-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT52H-B30-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-B30-QX reliable?

The price and inventory of BZT52H-B30-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-B30-QX is usually 5 days.

3.What payment methods are accepted for BZT52H-B30-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B30-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT52H-B30-QX?

BZT52H-B30-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT52H-B30-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-B30-QX?

For technical support, including BZT52H-B30-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B30-QX requirements.

6.How does Aetrix verify that BZT52H-B30-QX is sourced from the original manufacturer or authorized distributors?

All BZT52H-B30-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-B30-QX meets industry standards.

7.What is the process for return or replacement of BZT52H-B30-QX?

All BZT52H-B30-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B30-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-B30-QX part is unused and in its original packaging.

Return procedure for BZT52H-B30-QX:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…