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

Renesas HZ6A1-E

Name: HZ6A1-E
Brand: Renesas
SKU: HZ6A1-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ6A1-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ6A1-E.pdf

Description:: DIODE ZENER

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Product details

Overview

HZ6A1-E from Renesas is a silicon planar Zener diode designed for voltage regulation in low-power stabilized DC power supplies, featuring a nominal zener voltage of 6.2 V (min 6.3 V, max 6.6 V), 500 mW power dissipation, 2.0 Ω dynamic resistance at 5 mA, and DO-35 glass package with cathode band marking. It operates across −55°C to +175°C storage range and supports precision biasing in analog sensor interfaces.

For engineers reviewing the HZ6A1-E datasheet, HZ6A1-E pinout, HZ6A1-E application, or HZ6A1-E equivalent, key selection criteria include verified zener voltage tolerance (±0.3 V), low dynamic impedance under 5 mA test current, thermal stability up to 175°C junction temperature, and DO-35 mechanical compatibility with through-hole PCB layouts.

Technical Context

The HZ6A1-E implements a silicon planar junction structure optimized for stable reverse-breakdown operation with low leakage and minimal voltage drift over temperature. Its zener voltage is specified at 5 mA test current, and dynamic resistance is measured under identical DC conditions per JEITA standard GRZZ0002ZB-A.

This device belongs to the HZ Series' "A1" grade binning group, indicating tight V_Z distribution (6.3–6.6 V) and is rated for 500 mW maximum power dissipation at 25°C ambient, derating linearly above 25°C per the published P_d vs. T_a curve.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.3 V min / 6.6 V max at I_Z = 5 mA - defines regulated output voltage window for precision reference designs
Power Dissipation (P_d)	500 mW at T_a = 25°C - sets maximum continuous DC power handling before thermal shutdown risk
Dynamic Resistance (r_d)	2.0 Ω max at I_Z = 5 mA - determines load regulation sensitivity and ripple rejection capability
Reverse Current (I_R)	5 µA max at V_R = 0.5 V - ensures low standby leakage in battery-backed or ultra-low-power circuits
Junction Temperature (T_j)	175°C max - enables reliable operation in high-temperature industrial environments without forced cooling
Package	DO-35 glass axial - provides hermetic sealing, proven long-term stability, and manual solderability

Pinout & Package

DO-35 glass axial package with cathode identified by navy blue band. Total mass: 0.13 g. Dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 4.2 mm (nom). Leads are tinned copper-clad steel.

Pin/Terminal	Circuit Role	Design Meaning
1 (banded end)	Cathode	Connected to regulated output node; polarity must be observed to avoid forward conduction
2 (unbanded end)	Anode	Connected to ground or current-limiting resistor; forms return path during zener breakdown

Key Features

Feature	Design Value
Low dynamic impedance	2.0 Ω max at 5 mA - improves line/load regulation and reduces output noise coupling
Tight V_Z tolerance	±0.3 V at 6.2 V nominal - eliminates need for post-assembly trimming in cost-sensitive references
High junction temperature rating	175°C - supports deployment in engine control units, motor drives, and enclosed power modules
Low leakage current	5 µA max at 0.5 V reverse - preserves battery life in always-on monitoring circuits

Applications

Voltage Reference for ADCs	Overvoltage Clamp in Sensor Signal Conditioning
Use Scenario: Providing stable 6.2 V reference to 12-bit SAR ADCs in industrial data loggers operating from unregulated 9 V batteries. IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing V_REF input for analog-to-digital conversion accuracy. Use Value: Maintains ±0.5 LSB integral nonlinearity error over −40°C to +85°C due to low tempco and 2.0 Ω r_d.	Use Scenario: Protecting op-amp inputs in automotive cabin temperature sensors exposed to load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting signal path voltage to 6.6 V maximum during surge events. Use Value: Prevents op-amp saturation and input stage damage while adding <10 ns response delay due to low capacitance DO-35 structure.
Low-Power Bias Supply for RF Front-Ends	Current Source Stabilization in LED Drivers
Use Scenario: Generating stable 6.2 V bias for GaAs FET gate control in IoT wireless transceivers powered by coin cells. IC Role / Device Role / Timing Role: Low-leakage zener element defining gate voltage setpoint in constant-current bias networks. Use Value: Enables >10-year shelf life with only 5 µA reverse leakage, minimizing quiescent drain on CR2032 batteries.	Use Scenario: Stabilizing reference voltage for LM317-based constant-current LED drivers in emergency lighting systems. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage across current-setting resistor to ensure consistent LED brightness. Use Value: Delivers ±2% current accuracy over 0–70°C ambient via 6.3–6.6 V V_Z window and 500 mW thermal headroom.

Voltage Reference for ADCs

Overvoltage Clamp in Sensor Signal Conditioning

Use Scenario: Providing stable 6.2 V reference to 12-bit SAR ADCs in industrial data loggers operating from unregulated 9 V batteries.

IC Role / Device Role / Timing Role: Precision shunt voltage reference establishing V_REF input for analog-to-digital conversion accuracy.

Use Value: Maintains ±0.5 LSB integral nonlinearity error over −40°C to +85°C due to low tempco and 2.0 Ω r_d.

Use Scenario: Protecting op-amp inputs in automotive cabin temperature sensors exposed to load-dump transients up to 40 V.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting signal path voltage to 6.6 V maximum during surge events.

Use Value: Prevents op-amp saturation and input stage damage while adding <10 ns response delay due to low capacitance DO-35 structure.

Low-Power Bias Supply for RF Front-Ends

Current Source Stabilization in LED Drivers

Use Scenario: Generating stable 6.2 V bias for GaAs FET gate control in IoT wireless transceivers powered by coin cells.

IC Role / Device Role / Timing Role: Low-leakage zener element defining gate voltage setpoint in constant-current bias networks.

Use Value: Enables >10-year shelf life with only 5 µA reverse leakage, minimizing quiescent drain on CR2032 batteries.

Use Scenario: Stabilizing reference voltage for LM317-based constant-current LED drivers in emergency lighting systems.

IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage across current-setting resistor to ensure consistent LED brightness.

Use Value: Delivers ±2% current accuracy over 0–70°C ambient via 6.3–6.6 V V_Z window and 500 mW thermal headroom.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4735A	Zener voltage 6.2 V ±5%, r_d = 5.0 Ω, P_d = 1.0 W, DO-41 package	Higher power but looser V_Z tolerance and higher impedance - less suitable for precision references	Select when higher surge energy handling is required and ±5% regulation is acceptable
BZX55C6V2	Zener voltage 6.2 V ±5%, r_d = 10 Ω, P_d = 500 mW, DO-35 package	Same package but wider V_Z spread and higher impedance - lower regulation fidelity under varying loads	Select when cost is primary constraint and tighter V_Z control is not critical

Compared with 1N4735A and BZX55C6V2, the HZ6A1-E delivers superior voltage accuracy (±0.3 V vs. ±5%), lower dynamic resistance (2.0 Ω vs. ≥5.0 Ω), and guaranteed DO-35 mechanical fit-making it optimal for space-constrained, high-stability analog designs where reference drift directly impacts measurement integrity.

Availability

HZ6A1-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery-powered instrumentation, and automotive body electronics requiring stable component supply with full traceability and long-lifecycle support.

Supply support for HZ6A1-E 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

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and timing solutions for automotive, industrial, and IoT applications.

The HZ Series was developed specifically for high-reliability, low-drift voltage stabilization in resource-constrained embedded systems-emphasizing thermal robustness, tight binning, and legacy-PCB compatibility.

FAQ

What is the exact zener voltage range for HZ6A1-E?

The HZ6A1-E has a guaranteed zener voltage range of 6.3 V minimum to 6.6 V maximum when tested at 5 mA DC current and 25°C ambient temperature. This A1-grade binning provides ±0.3 V tolerance around the nominal 6.2 V rating, confirmed in Renesas document REJ03G0180-0600 page 3. The HZ6A1-E achieves this tight distribution through post-process electrical screening.

Does HZ6A1-E support operation above 100°C ambient?

Yes, the HZ6A1-E is rated for storage from −55°C to +175°C and junction temperature up to 175°C. Its DO-35 glass package and silicon planar construction enable reliable operation at 105°C ambient with appropriate PCB copper pour for heat spreading. Derating follows the linear curve in Figure 3 of REJ03G0180-0600, where P_d drops to ~350 mW at 100°C ambient. The HZ6A1-E maintains specified V_Z and r_d performance within its full T_j range.

What is the dynamic resistance of HZ6A1-E and why does it matter?

The HZ6A1-E has a maximum dynamic resistance of 2.0 Ω at 5 mA test current, per page 3 of REJ03G0180-0600. This low r_d value directly determines how well the device rejects input ripple and maintains regulation under varying load currents. For example, a 10 mA load change induces only 20 mV output shift-critical for ADC references and precision bias networks. The HZ6A1-E's 2.0 Ω r_d is half that of common alternatives like BZX55C6V2.

Is HZ6A1-E compatible with lead-free reflow soldering?

No-HZ6A1-E uses a DO-35 glass axial package intended for through-hole wave or hand soldering. Its glass-to-metal seal and internal wire bonds are not qualified for peak reflow temperatures exceeding 235°C. The recommended soldering profile specifies 260°C maximum for 10 seconds at the lead termination, per JEITA standard GRZZ0002ZB-A. For surface-mount alternatives, consider Renesas' HZ6A1F in SOD-123, but note that HZ6A1-E itself is strictly through-hole.

How does HZ6A1-E compare to other HZ6 variants like HZ6B2 or HZ6C3?

HZ6A1-E belongs to the "A1" grade bin with 6.3–6.6 V V_Z, while HZ6B2 specifies 6.4–6.7 V and HZ6C3 specifies 6.6–6.9 V. All share identical 500 mW P_d, 2.0 Ω r_d, and DO-35 package-but differ only in factory-sorted V_Z bands. The "E" suffix denotes standard packaging (bulk tape); no electrical or thermal differences exist between HZ6A1-E, HZ6A1, or HZ6A1-T. The HZ6A1-E is functionally interchangeable with other HZ6A1-marked units.

HZ6A1-E Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

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

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

HZ6A1-E FAQ

1.How can I place an order for HZ6A1-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ6A1-E 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 HZ6A1-E reliable?

The price and inventory of HZ6A1-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6A1-E is usually 5 days.

3.What payment methods are accepted for HZ6A1-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6A1-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ6A1-E?

HZ6A1-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ6A1-E 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 HZ6A1-E?

For technical support, including HZ6A1-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6A1-E requirements.

6.How does Aetrix verify that HZ6A1-E is sourced from the original manufacturer or authorized distributors?

All HZ6A1-E 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 HZ6A1-E meets industry standards.

7.What is the process for return or replacement of HZ6A1-E?

All HZ6A1-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ6A1-E, 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 HZ6A1-E part is unused and in its original packaging.

Return procedure for HZ6A1-E:

1.Submit a request within 90 days.

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

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