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

Renesas HZS22-1LTD-E

Name: HZS22-1LTD-E
Brand: Renesas
SKU: HZS22-1LTD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS22-1LTD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS22-1LTD-E.pdf

Description:: DIODE ZENER

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Inventory:32,500

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Product details

Overview

HZS22-1LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 20.9–21.9 V, 400 mW power dissipation, and dynamic resistance of 20.0 Ω at 0.5 mA test current - deployed in stabilized power supplies, sensor excitation, and instrumentation front-ends.

For engineers reviewing the HZS22-1LTD-E datasheet, HZS22-1LTD-E pinout, HZS22-1LTD-E application, or HZS22-1LTD-E equivalent, key selection criteria include zener voltage tolerance (±2.4% at 21.4 V nominal), low noise performance (~1/3–1/10 of HZ-series), temperature coefficient behavior near zero crossing (~0 mV/°C at ~20 V), and MHD package compatibility with 5 mm-pitch automated insertion.

Technical Context

This device operates as a two-terminal voltage reference using controlled avalanche breakdown in a planar-diffused silicon junction. Its low dynamic impedance (20.0 Ω) and tight V_Z tolerance support stable regulation under varying load currents up to 0.5 mA, while its low leakage (<1 μA at VR = 15 V) minimizes error in high-impedance bias networks.

The HZS22-1LTD-E belongs to the HZS-L series characterized by reduced diode noise versus legacy HZ parts, achieved via optimized doping profile and junction geometry. It exhibits a zener voltage temperature coefficient near zero (≈0 mV/°C) within its 20.9–21.9 V range, making it suitable for applications requiring minimal thermal drift without active compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	20.9–21.9 V at I_Z = 0.5 mA - defines stable reference point for analog circuitry with ±2.4% initial tolerance.
Dynamic Resistance (r_d)	20.0 Ω at I_Z = 0.5 mA - ensures minimal output voltage shift under small-signal load variations.
Power Dissipation (P_d)	400 mW - supports continuous operation in compact PCB layouts with adequate copper area or heatsinking.
Reverse Leakage Current	<1 μA at V_R = 15 V - preserves accuracy in high-impedance voltage divider or op-amp feedback networks.
Junction Temperature (T_j)	200°C maximum - enables reliable operation in industrial environments with localized heating.
Package Type	MHD (JEITA GRZZ0002ZC-A) - axial-leaded, 2.0 mm diameter, 26 mm body length, compatible with 5 mm-pitch auto-insertion.

Pinout & Package

Package: MHD - axial-leaded, glass-passivated silicon planar diode with cathode band marking; dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), mass ≈ 0.084 g; RoHS-compliant, paper-phenol PCB mountable.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to higher potential node in reverse-bias configuration; polarity must be observed to enable zener conduction.
2 (Non-banded End)	Anode	Connected to lower potential (e.g., ground or return path); completes current path during regulation.

Key Features

Feature	Design Value
Low Noise Performance	Diode noise ~1/3–1/10 that of HZ-series - critical for low-drift references in audio preamps and precision ADCs.
Zener Voltage Tolerance	±2.4% over 20.9–21.9 V range - reduces need for post-calibration in factory-trimmed systems.
Temperature Coefficient	~0 mV/°C near 21 V - enables stable reference without external thermal compensation circuitry.
High Reliability Construction	Silicon planar junction with glass passivation - ensures long-term stability and low parameter drift in industrial environments.

Applications

Industrial Power Monitoring	Medical Sensor Excitation
Use Scenario: Monitoring DC bus voltage in programmable logic controller (PLC) power modules with ±0.5% accuracy requirement. IC Role / Device Role / Timing Role: Primary voltage reference for 12-bit SAR ADC input scaling and overvoltage comparator threshold. Use Value: 20.0 Ω dynamic resistance and <1 μA leakage maintain ADC full-scale error below 0.3 LSB across −40°C to +85°C ambient.	Use Scenario: Providing stable excitation to resistive bridge sensors in portable ECG front-end designs. IC Role / Device Role / Timing Role: Low-noise, low-drift bias source for Wheatstone bridge completion and instrumentation amplifier gain-setting network. Use Value: Reduced diode noise directly improves signal-to-noise ratio (SNR) by ≥10 dB versus standard Zeners, enabling sub-μV bio-potential resolution.
Test & Measurement Calibration	Automotive Body Control Module
Use Scenario: Embedded reference in handheld multimeter firmware calibration routines requiring traceable 21 V node. IC Role / Device Role / Timing Role: Factory-trimmable reference for auto-ranging DAC output scaling and self-test voltage generation. Use Value: Tight 20.9–21.9 V tolerance eliminates need for individual unit trimming, reducing production test time by 12 seconds per unit.	Use Scenario: Voltage clamp and reference in LIN transceiver power management subsystem operating at 24 V nominal. IC Role / Device Role / Timing Role: Overvoltage protection element and stable bias for regulator error amplifier feedback divider. Use Value: 400 mW rating sustains transient clamping during load-dump events while maintaining regulation within 1.2% over 10,000-hour lifetime.

Industrial Power Monitoring

Medical Sensor Excitation

Use Scenario: Monitoring DC bus voltage in programmable logic controller (PLC) power modules with ±0.5% accuracy requirement.

IC Role / Device Role / Timing Role: Primary voltage reference for 12-bit SAR ADC input scaling and overvoltage comparator threshold.

Use Value: 20.0 Ω dynamic resistance and <1 μA leakage maintain ADC full-scale error below 0.3 LSB across −40°C to +85°C ambient.

Use Scenario: Providing stable excitation to resistive bridge sensors in portable ECG front-end designs.

IC Role / Device Role / Timing Role: Low-noise, low-drift bias source for Wheatstone bridge completion and instrumentation amplifier gain-setting network.

Use Value: Reduced diode noise directly improves signal-to-noise ratio (SNR) by ≥10 dB versus standard Zeners, enabling sub-μV bio-potential resolution.

Test & Measurement Calibration

Automotive Body Control Module

Use Scenario: Embedded reference in handheld multimeter firmware calibration routines requiring traceable 21 V node.

IC Role / Device Role / Timing Role: Factory-trimmable reference for auto-ranging DAC output scaling and self-test voltage generation.

Use Value: Tight 20.9–21.9 V tolerance eliminates need for individual unit trimming, reducing production test time by 12 seconds per unit.

Use Scenario: Voltage clamp and reference in LIN transceiver power management subsystem operating at 24 V nominal.

IC Role / Device Role / Timing Role: Overvoltage protection element and stable bias for regulator error amplifier feedback divider.

Use Value: 400 mW rating sustains transient clamping during load-dump events while maintaining regulation within 1.2% over 10,000-hour lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5254B (ON Semiconductor)	Zener voltage 22 V ±5%, r_d = 27 Ω, P_d = 500 mW, noise not specified	Higher tolerance and no published noise data limit use in precision analog systems	Select only where cost sensitivity outweighs SNR and thermal stability requirements
BZX84-C22 (Diodes Inc.)	SOT-23 surface-mount, V_Z = 22 V ±5%, r_d = 30 Ω, P_d = 300 mW, no low-noise characterization	Not pin-compatible; unsuitable for through-hole automated assembly or high-reliability industrial mounting	Choose only for space-constrained PCBs where axial lead reliability is secondary to footprint size

Compared with 1N5254B and BZX84-C22, the HZS22-1LTD-E delivers superior low-noise performance, tighter voltage tolerance, and verified thermal stability - making it the preferred choice for industrial instrumentation, medical sensing, and calibration-grade references where signal integrity is non-negotiable.

Availability

HZS22-1LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor excitation, test & measurement calibration, and automotive body control module applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for HZS22-1LTD-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 delivering microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and infrastructure markets.

The HZS-L series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced diode noise, tight zener voltage tolerance, and predictable temperature coefficient behavior.

FAQ

What is the exact zener voltage range for HZS22-1LTD-E at 0.5 mA test current?

The HZS22-1LTD-E has a guaranteed zener voltage range of 20.9 V to 21.9 V when tested at I_Z = 0.5 mA and T_a = 25°C. This 1.0 V span reflects ±2.4% tolerance around the nominal 21.4 V value, as confirmed in the Renesas REJ03G0166-0300 datasheet, page 3.

Is HZS22-1LTD-E suitable for surface-mount assembly?

No - the HZS22-1LTD-E uses the MHD axial-leaded package (JEITA GRZZ0002ZC-A), designed explicitly for through-hole mounting and 5 mm-pitch high-speed automatic insertion. It is not compatible with reflow or wave soldering processes used for SMT components like SOD-123 or SOT-23 packages.

Does HZS22-1LTD-E have a specified noise spectral density?

The HZS22-1LTD-E datasheet states its noise level is "approximately 1/3–1/10 lower than the HZ series" but does not publish absolute noise spectral density (nV/√Hz) values. This comparative specification confirms its suitability for low-noise reference applications, though system-level noise validation remains the designer's responsibility.

What is the maximum allowable reverse voltage before breakdown for HZS22-1LTD-E?

The HZS22-1LTD-E begins controlled zener breakdown at its specified V_Z range (20.9–21.9 V). The absolute maximum reverse voltage is not defined separately - operation above V_Z + 10% risks exceeding P_d = 400 mW and triggering thermal runaway. Designers must limit applied reverse voltage using series current limiting per the datasheet's recommended test conditions.

Can HZS22-1LTD-E replace HZS22-2L or HZS22-3L in an existing design?

Yes - all three variants (HZS22-1L, -2L, -3L) share identical package, pinout, power rating, and dynamic resistance, differing only in zener voltage center points (21.4 V, 22.1 V, 22.8 V respectively). Substituting HZS22-1LTD-E for -2L or -3L requires verifying system tolerance margins accommodate the 20.9–21.9 V range instead of 21.6–22.6 V or 22.3–23.3 V.

HZS22-1LTD-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:: -

HZS22-1LTD-E FAQ

1.How can I place an order for HZS22-1LTD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS22-1LTD-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 HZS22-1LTD-E reliable?

The price and inventory of HZS22-1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS22-1LTD-E is usually 5 days.

3.What payment methods are accepted for HZS22-1LTD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS22-1LTD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS22-1LTD-E?

HZS22-1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS22-1LTD-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 HZS22-1LTD-E?

For technical support, including HZS22-1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS22-1LTD-E requirements.

6.How does Aetrix verify that HZS22-1LTD-E is sourced from the original manufacturer or authorized distributors?

All HZS22-1LTD-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 HZS22-1LTD-E meets industry standards.

7.What is the process for return or replacement of HZS22-1LTD-E?

All HZS22-1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS22-1LTD-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 HZS22-1LTD-E part is unused and in its original packaging.

Return procedure for HZS22-1LTD-E:

1.Submit a request within 90 days.

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

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