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

Renesas HZ30-1LTA-E

Name: HZ30-1LTA-E
Brand: Renesas
SKU: HZ30-1LTA-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ30-1LTA-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ30-1LTA-E.pdf

Description:: DIODE ZENER 0.4W

Quantity:: RFQ Add To RFQ list

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Inventory:10,000

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Product details

Overview

HZ30-1LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and precision stabilization in analog signal chains and power regulation circuits, with a nominal zener voltage of 28.2–29.6 V, dynamic resistance of 27.0 Ω at 0.5 mA, maximum power dissipation of 400 mW, and DO-35 glass package - widely used in instrumentation-grade DC power supplies and sensor biasing.

For engineers reviewing the HZ30-1LTA-E datasheet, HZ30-1LTA-E pinout, HZ30-1LTA-E application, or HZ30-1LTA-E equivalent, this part delivers verified low-noise performance (≈1/3–1/10 lower than standard HZ series), tight zener voltage tolerance, and stable temperature coefficient - critical for high-fidelity voltage references, calibration circuits, and low-drift analog front-ends.

Technical Context

The HZ30-1LTA-E employs a silicon planar junction structure with controlled doping and passivation to minimize generation-recombination noise, achieving significantly lower noise density than legacy HZ-series Zeners. Its zener voltage is specified at 0.5 mA test current under DC conditions, ensuring predictable behavior in low-current reference designs.

With a zener voltage temperature coefficient of approximately −0.06 %/°C (−17 mV/°C) near 30 V - confirmed by Figure 2 in REJ03G0182-0300 - the device supports stable operation across −55°C to +175°C ambient range, and its 27.0 Ω dynamic impedance enables effective ripple suppression when used with passive filtering.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	28.2–29.6 V at I_Z = 0.5 mA - defines precise DC reference level for feedback networks and analog comparators.
Dynamic Resistance (r_d)	27.0 Ω at I_Z = 0.5 mA - determines output impedance and AC ripple rejection capability in shunt regulator topologies.
Power Dissipation (P_d)	400 mW maximum - sets upper limit for continuous DC power handling without derating at 25°C ambient.
Reverse Leakage (I_R)	≤1 μA at V_R = 20.2 V - ensures minimal error current in high-impedance reference nodes.
Junction Temperature (T_j)	175°C maximum - enables reliable operation in thermally constrained industrial enclosures and sealed modules.
Package	DO-35 glass axial - provides hermetic sealing, low parasitic capacitance (<2 pF), and compatibility with wave-solder and hand-solder processes.

Pinout & Package

Package: DO-35 glass axial package (Renesas code GRZZ0002ZB-A, JEITA code SC-40), body color orange, cathode band navy blue. Total mass ≈0.13 g.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated output node; reverse-biased terminal where zener breakdown occurs.
2 (Non-banded End)	Anode	Connected to circuit ground or lowest potential reference; completes current path during regulation.

Key Features

Feature	Design Value
Low-noise zener operation	Noise level ≈1/3–1/10 that of standard HZ series - directly improves SNR in precision ADC references and low-level sensor signal conditioning.
Tight zener voltage tolerance	±0.7 V total spread (28.2–29.6 V) at 0.5 mA - reduces calibration burden in factory-trimmed instruments and voltage monitors.
Low dynamic impedance	27.0 Ω at 0.5 mA - enables <10 mV/V line regulation error and >40 dB ripple attenuation in simple shunt regulators.
High thermal stability	Temperature coefficient ≈−0.06 %/°C - limits drift to <±15 mV over −40°C to +85°C operating range.
Hermetic DO-35 packaging	Sealed glass construction - ensures long-term parameter stability and immunity to humidity-induced leakage degradation.

Applications

Industrial Sensor Signal Conditioning	Calibration Reference for Portable Meters
Use Scenario: Biasing bridge sensors and powering low-power op-amps in environmental monitoring transmitters. IC Role / Device Role / Timing Role: Zener diode providing stable 28.5 V reference for excitation and analog front-end gain setting. Use Value: Low noise and tight V_Z tolerance ensure sub-0.1% full-scale measurement accuracy over temperature and time.	Use Scenario: Serving as primary voltage reference in handheld multimeters and data loggers requiring traceable accuracy. IC Role / Device Role / Timing Role: Shunt voltage reference establishing 28.5 V calibration point for internal DACs and ADCs. Use Value: Hermetic DO-35 package and low aging drift support NIST-traceable calibration intervals exceeding 2 years.
Low-Power DC-DC Feedback Network	Overvoltage Protection Clamping
Use Scenario: Regulating output of isolated flyback converters in medical auxiliary power supplies. IC Role / Device Role / Timing Role: Precision shunt reference feeding optocoupler feedback loop to maintain ±1% output regulation. Use Value: 27.0 Ω r_d minimizes load-dependent error, enabling stable regulation even with ±10% input variation.	Use Scenario: Clamping transient surges on 24 V industrial control bus lines exposed to inductive switching. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting bus voltage to ≤30 V during ESD or load dump events. Use Value: 400 mW P_d rating allows safe absorption of 100 ms 1 A surge pulses without parametric shift.

Industrial Sensor Signal Conditioning

Calibration Reference for Portable Meters

Use Scenario: Biasing bridge sensors and powering low-power op-amps in environmental monitoring transmitters.

IC Role / Device Role / Timing Role: Zener diode providing stable 28.5 V reference for excitation and analog front-end gain setting.

Use Value: Low noise and tight V_Z tolerance ensure sub-0.1% full-scale measurement accuracy over temperature and time.

Use Scenario: Serving as primary voltage reference in handheld multimeters and data loggers requiring traceable accuracy.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing 28.5 V calibration point for internal DACs and ADCs.

Use Value: Hermetic DO-35 package and low aging drift support NIST-traceable calibration intervals exceeding 2 years.

Low-Power DC-DC Feedback Network

Overvoltage Protection Clamping

Use Scenario: Regulating output of isolated flyback converters in medical auxiliary power supplies.

IC Role / Device Role / Timing Role: Precision shunt reference feeding optocoupler feedback loop to maintain ±1% output regulation.

Use Value: 27.0 Ω r_d minimizes load-dependent error, enabling stable regulation even with ±10% input variation.

Use Scenario: Clamping transient surges on 24 V industrial control bus lines exposed to inductive switching.

IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting bus voltage to ≤30 V during ESD or load dump events.

Use Value: 400 mW P_d rating allows safe absorption of 100 ms 1 A surge pulses without parametric shift.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor 1N5256B	Zener voltage 28 V (±5%), r_d = 35 Ω, P_d = 500 mW, DO-35 package.	Higher dynamic impedance increases ripple sensitivity; wider V_Z tolerance requires post-calibration.	Acceptable where cost is prioritized over noise and initial accuracy; not recommended for metrology-grade references.
Vishay BZX55-C30	Zener voltage 30 V (±5%), r_d = 30 Ω, P_d = 500 mW, DO-35 package.	30 V nominal vs. HZ30-1LTA-E's 28.2–29.6 V; higher temperature coefficient (−0.08 %/°C) increases drift.	Suitable for general-purpose clamping; avoid in circuits requiring <±0.5% reference stability over temperature.

Compared with 1N5256B and BZX55-C30, the HZ30-1LTA-E offers superior noise performance, tighter V_Z distribution, and lower temperature drift - making it the preferred choice for applications demanding long-term reference stability and high signal integrity without trimming.

Availability

HZ30-1LTA-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable instrument calibration, and low-power DC-DC feedback networks requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for HZ30-1LTA-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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications - targeting instrumentation, test equipment, and precision analog systems where conventional Zener diodes introduce unacceptable noise or drift.

FAQ

What is the zener voltage range of the HZ30-1LTA-E?

The HZ30-1LTA-E has a guaranteed zener voltage range of 28.2 V to 29.6 V when tested at 0.5 mA DC current, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This tight 1.4 V span reflects its use in precision reference applications where initial accuracy matters more than wide tolerance bands. The HZ30-1LTA-E achieves this via process-controlled planar junction fabrication and rigorous binning.

Does the HZ30-1LTA-E have a specified noise performance?

Yes - the HZ30-1LTA-E is explicitly characterized for low noise, with Renesas stating its noise level is approximately 1/3 to 1/10 that of the standard HZ series. This improvement stems from optimized silicon planar structure and surface passivation, reducing generation-recombination noise sources. The HZ30-1LTA-E is therefore preferred over generic Zeners in audio references, high-resolution ADC biasing, and low-drift sensor excitation circuits.

What is the maximum power dissipation rating for the HZ30-1LTA-E?

The HZ30-1LTA-E has a maximum power dissipation (P_d) of 400 mW at T_a = 25°C, as defined in the Absolute Maximum Ratings table of its official datasheet. Derating is required above 25°C ambient, following the curve in Figure 3 (Page 4), where power handling drops linearly to zero at 175°C junction temperature. This rating ensures robust operation in enclosed industrial enclosures when paired with appropriate series resistance.

Is the HZ30-1LTA-E RoHS compliant?

Yes - the HZ30-1LTA-E meets EU RoHS Directive requirements, as confirmed by Renesas' environmental compliance documentation and material declarations. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. The DO-35 glass package and internal metallization are fully compliant, supporting green manufacturing and export to regulated markets without restriction.

What is the temperature coefficient of the HZ30-1LTA-E?

The HZ30-1LTA-E exhibits a zener voltage temperature coefficient (γ_Z) of approximately −0.06 %/°C (or −17 mV/°C), based on Figure 2 in the official datasheet. This negative coefficient is typical for Zeners in the 25–35 V range and enables predictable, linear drift behavior - allowing compensation in high-accuracy designs. The HZ30-1LTA-E's coefficient is tighter and more stable than many alternatives, contributing to its suitability in unheated reference circuits.

HZ30-1LTA-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:: -

HZ30-1LTA-E FAQ

1.How can I place an order for HZ30-1LTA-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ30-1LTA-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 HZ30-1LTA-E reliable?

The price and inventory of HZ30-1LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ30-1LTA-E is usually 5 days.

3.What payment methods are accepted for HZ30-1LTA-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ30-1LTA-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ30-1LTA-E?

HZ30-1LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ30-1LTA-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 HZ30-1LTA-E?

For technical support, including HZ30-1LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ30-1LTA-E requirements.

6.How does Aetrix verify that HZ30-1LTA-E is sourced from the original manufacturer or authorized distributors?

All HZ30-1LTA-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 HZ30-1LTA-E meets industry standards.

7.What is the process for return or replacement of HZ30-1LTA-E?

All HZ30-1LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ30-1LTA-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 HZ30-1LTA-E part is unused and in its original packaging.

Return procedure for HZ30-1LTA-E:

1.Submit a request within 90 days.

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

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