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. HPZR-C28-QX

Name: HPZR-C28-QX
Brand: Nexperia USA Inc.
SKU: HPZR-C28-QX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: HPZR-C28-QX

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SOD-123W

Datasheet:: HPZR-C28-QX.pdf

Description:: DIODE ZENER 28V 682MW SOD123W

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,551

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

Product details

Overview

HPZR-C28-QX from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision voltage clamping and regulation at 28 V nominal working voltage with ±5 % tolerance, 5.5 W total power dissipation at T_sp = 75 °C, and 30 kV ESD rating per IEC 61000-4-2 (contact discharge), used in automotive power rail protection circuits.

For engineers reviewing the HPZR-C28-QX datasheet, HPZR-C28-QX pinout, HPZR-C28-QX application, or HPZR-C28-QX equivalent, this device supports stable low-current regulation in harsh environments where AEC-Q101 qualification, high surge immunity (800 W non-repetitive peak power), and thermal robustness (T_j up to 175 °C) are required.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 28 V at I_Z = 20 mA, differential resistance R_Z = 24 Ω, and reverse current I_R ≤ 0.1 μA at V_R = 22.7 V. It delivers regulated voltage reference stability across temperature (−55 °C to +175 °C ambient) and meets automotive-grade reliability requirements.

Its thermal design relies on low junction-to-solder-point thermal resistance (R_th(j-sp) = 18 K/W) and supports high transient energy handling via short-pulse capability (t_p ≤ 100 µs, P_ZSM = 800 W), enabling use in load-dump suppression and ESD-critical interfaces without external buffering.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	26.7 V to 29.5 V at I_Z = 20 mA - defines precise clamping threshold for 28 V nominal rail protection
Power Dissipation P_tot	5500 mW at T_sp = 75 °C (zero lead length) - enables sustained regulation under high ambient thermal stress
Differential Resistance R_Z	24 Ω at I_Z = 20 mA - ensures tight voltage regulation under varying load current
ESD Rating	30 kV per IEC 61000-4-2 contact discharge - provides robust immunity against human-body and system-level ESD events
Junction Temperature T_j	−55 °C to +175 °C - supports operation in under-hood automotive environments and industrial control enclosures
Forward Voltage V_F	≤ 1 V at I_F = 100 mA - minimizes conduction loss during forward-biased fault conditions
Non-repetitive Peak Power	800 W for t_p ≤ 100 µs - handles transient surges such as ISO 7637-2 pulse 1/2a/5a without degradation

Pinout & Package

HPZR-C28-QX uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead, low-profile SMD construction with cathode marked by a bar on the top surface.

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

Key Features

Feature	Design Value
AEC-Q101 qualified	Qualified for automotive applications per Stress Test Qualification for Discrete Semiconductors - enables use in engine control, ADAS, and body electronics
High surge power handling	800 W non-repetitive peak power (t_p ≤ 100 µs) - suppresses load dump and inductive switching transients without failure
Low thermal resistance	R_th(j-sp) = 18 K/W - improves thermal coupling to PCB copper, enhancing long-term reliability at elevated temperatures
Precision voltage tolerance	±5 % nominal V_Z - ensures predictable clamping behavior across production lots and temperature ranges
ESD-hardened construction	30 kV IEC 61000-4-2 contact discharge rating - eliminates need for external TVS staging in many interface protection designs

Applications

Automotive Power Rail Protection

Industrial Sensor Reference Clamping

Use Scenario: Protecting 24 V supply lines in engine control units against load dump transients per ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp overvoltage spikes to ≤30 V.

Use Value: Prevents damage to downstream MCUs and analog front-ends by limiting peak voltage within safe operating area of 28 V-rated components.

Use Scenario: Stabilizing reference voltage for 4–20 mA current-loop sensors in factory automation PLC modules.

IC Role / Device Role / Timing Role: Precision shunt regulator providing stable 28 V bias for op-amp and ADC reference circuitry.

Use Value: Maintains sensor accuracy across −40 °C to +125 °C ambient due to low R_Z and wide T_j range.

On-Board Charger (OBC) Feedback Regulation

LED Driver Overvoltage Suppression

Use Scenario: Regulating auxiliary 28 V DC-DC converter output in EV on-board chargers during dynamic load changes.

IC Role / Device Role / Timing Role: Shunt regulator absorbing excess current when feedback loop overshoots target voltage.

Use Value: Enables fast response to step-load transients without requiring active compensation, reducing BOM count.

Use Scenario: Protecting constant-current LED driver ICs from bus overvoltage during hot-plug or capacitor charging events.

IC Role / Device Role / Timing Role: Transient voltage suppressor clamping input rail to 29.5 V maximum during surge events.

Use Value: Extends LED driver lifetime by preventing gate oxide stress and internal LDO overvoltage failure modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C27LT1G	27 V nominal, SOT-23 package, P_tot = 350 mW, R_Z = 30 Ω, not AEC-Q101 qualified	Limited to low-power consumer applications; insufficient for automotive surge handling or thermal derating	Select only for cost-sensitive, non-automotive, <100 mW regulation needs
1N4752A	27 V nominal, DO-41 through-hole, P_tot = 1 W, R_Z = 35 Ω, no ESD rating, T_j max = 175 °C	Requires manual assembly; lacks surface-mount compatibility and IEC 61000-4-2 ESD hardening	Use only in legacy through-hole designs where rework tolerance and board space permit

Compared with BZX84-C27LT1G and 1N4752A, HPZR-C28-QX delivers 15× higher power dissipation, automotive qualification, and 30 kV ESD immunity - making it uniquely suitable for modern SMD-based automotive and industrial power protection where reliability and miniaturization are critical.

Availability

HPZR-C28-QX is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor reference clamping, on-board charger feedback regulation, and LED driver overvoltage suppression requiring stable component supply with full traceability and AEC-Q101 compliance.

Supply support for HPZR-C28-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 leading global semiconductor manufacturer specializing in high-performance, reliable discrete and logic devices, with core expertise in automotive-qualified components and advanced packaging technologies.

HPZR-C28-QX belongs to the HPZR-Q series of high-power Zener diodes engineered specifically for automotive and industrial voltage regulation where high surge immunity, thermal resilience, and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum continuous power dissipation for HPZR-C28-QX at 25 °C ambient?

At T_amb ≤ 25 °C on an FR4 PCB with single-sided 1 cm² cathode pad, HPZR-C28-QX supports 1154 mW continuous power dissipation. This value drops linearly with increasing solder point temperature, reaching 5500 mW only at T_sp = 75 °C under zero-lead-length test conditions.

Does HPZR-C28-QX require external series resistance in typical Zener regulation circuits?

Yes - a current-limiting resistor must be placed in series with the anode to ensure I_Z remains within 20 mA (typical operating point) and does not exceed the 400 mA absolute maximum forward current. Resistor value is calculated based on input voltage, desired load current, and V_Z tolerance band.

Can HPZR-C28-QX replace standard 1N47xx series Zeners in existing designs?

No direct drop-in replacement: HPZR-C28-QX uses CFP3 (SOD123W) package versus DO-41 for 1N47xx, requiring footprint redesign. Its 28 V nominal voltage aligns closely with 1N4752A (27 V), but its 5.5 W rating and AEC-Q101 qualification enable higher-reliability operation where thermal and surge margins are constrained.

How is the 30 kV ESD rating validated for HPZR-C28-QX?

The 30 kV rating is measured per IEC 61000-4-2 contact discharge at the cathode soldering point, using ten non-repetitive ESD pulses. It reflects actual device-level robustness-not system-level performance-and applies only when mounted per recommended footprint with proper grounding of the cathode pad.

HPZR-C28-QX Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: HPZR-Q

Package/Case:: SOD-123W

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 28 V

Tolerance:: ±5%

Power - Max:: 682 mW

Impedance (Max) (Zzt):: 37.1 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 24 V

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 100 mA

Operating Temperature:: 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123W

HPZR-C28-QX FAQ

1.How can I place an order for HPZR-C28-QX through Aetrix?

Please submit a Request for Quotation (RFQ) for HPZR-C28-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 HPZR-C28-QX reliable?

The price and inventory of HPZR-C28-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HPZR-C28-QX is usually 5 days.

3.What payment methods are accepted for HPZR-C28-QX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HPZR-C28-QX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HPZR-C28-QX?

HPZR-C28-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HPZR-C28-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 HPZR-C28-QX?

For technical support, including HPZR-C28-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HPZR-C28-QX requirements.

6.How does Aetrix verify that HPZR-C28-QX is sourced from the original manufacturer or authorized distributors?

All HPZR-C28-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 HPZR-C28-QX meets industry standards.

7.What is the process for return or replacement of HPZR-C28-QX?

All HPZR-C28-QX units undergo pre-shipment inspection (PSI). If there is an issue with HPZR-C28-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 HPZR-C28-QX part is unused and in its original packaging.

Return procedure for HPZR-C28-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…