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

Renesas HZS5A1TA-E

Name: HZS5A1TA-E
Brand: Renesas
SKU: HZS5A1TA-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS5A1TA-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS5A1TA-E.pdf

Description:: DIODE ZENER 0.4W

Quantity:: RFQ Add To RFQ list

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Inventory:9,666

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Product details

Overview

HZS5A1TA-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 4.8–5.0 V, maximum power dissipation of 400 mW, dynamic resistance ≤100 Ω at 5 mA, and reverse current ≤5 µA at 0.5 V - deployed in industrial control power rails and sensor biasing circuits.

For engineers reviewing the HZS5A1TA-E datasheet, HZS5A1TA-E pinout, HZS5A1TA-E application, or HZS5A1TA-E equivalent, this part serves as a surface-mount, 2-pin, MHD-package Zener diode optimized for high-speed automatic insertion, stable DC reference generation, and low-leakage voltage clamping in space-constrained embedded systems.

Technical Context

The HZS5A1TA-E operates as a two-terminal, passive voltage reference device using silicon planar junction technology. Its zener breakdown mechanism delivers tight voltage tolerance (±0.2 V) across grade A1 at 5 mA test current, with low temperature coefficient behavior typical of mid-voltage Zeners (~−2 to +3 mV/°C).

It exhibits low leakage (<5 µA at VR = 0.5 V), low dynamic impedance (≤100 Ω), and thermal stability up to 200°C junction temperature. The device is rated for continuous operation at ambient temperatures up to 125°C with derated power dissipation per Fig.3 in the datasheet.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.8–5.0 V at I_Z = 5 mA - defines precise DC reference level for feedback loops or analog circuit biasing.
Power Dissipation (P_d)	400 mW max at T_a = 25°C - supports compact PCB layout without forced cooling in low-current regulation.
Dynamic Resistance (r_d)	≤100 Ω at I_Z = 5 mA - ensures minimal output voltage variation under load transients.
Reverse Leakage (I_R)	≤5 µA at V_R = 0.5 V - enables low-quiescent-current designs in battery-powered or standby circuits.
Junction Temperature (T_j)	200°C max - allows reliable operation in thermally demanding industrial environments with adequate board thermal relief.
Package Type	MHD (JEITA GRZZ0002ZC-A) - 2.0 mm diameter cylindrical glass package with 5 mm pitch, compatible with high-speed auto-insertion equipment.

Pinout & Package

MHD package: hermetically sealed glass axial-lead diode, 2.0 mm diameter × ~3.0 mm length, cathode band marked on body, mass ≈ 0.084 g.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener breakdown terminal	Connected to regulated positive rail; reverse-biased operation requires higher potential here than at anode.
2 (Anode)	Reference ground/reference node	Typically tied to system ground or common return; establishes reference point for V_Z drop across the device.

Key Features

Feature	Design Value
Low zener impedance	≤100 Ω enables stable regulation under varying load currents in feedback networks.
Wide zener voltage range coverage	Part of HZS Series spanning 1.6–38 V - simplifies BOM consolidation across multiple voltage rails.
High-speed insertion compatibility	MHD package with 5 mm pitch supports automated assembly in high-volume manufacturing lines.
Low leakage current	≤5 µA at 0.5 V minimizes parasitic loading in high-impedance reference paths and sensor interfaces.

Applications

Industrial Power Monitoring	Automotive Sensor Biasing
Use Scenario: Voltage reference for analog-to-digital converters monitoring 5 V supply rails in PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing stable 4.9 V reference to ADC reference input and op-amp bias networks. Use Value: Maintains ±0.5% measurement accuracy over −40°C to +85°C ambient due to low r_d and controlled V_Z tolerance.	Use Scenario: Biasing voltage source for NTC thermistor signal conditioning in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Passive voltage clamp and reference generator ensuring consistent excitation current for resistive sensing elements. Use Value: Enables <1% full-scale error across operating temperature range with no active components required.
IoT Edge Node Regulation	Medical Diagnostic Instrumentation
Use Scenario: Local 5 V stabilization for ultra-low-power microcontroller reset circuitry in battery-operated wireless sensors. IC Role / Device Role / Timing Role: Low-leakage Zener supplying clean reset threshold voltage independent of main LDO output ripple. Use Value: Reduces quiescent current by >2 µA versus standard 5.1 V Zener alternatives, extending battery life.	Use Scenario: Precision reference for analog front-end gain calibration in portable ECG signal acquisition units. IC Role / Device Role / Timing Role: Stable DC reference source for programmable gain amplifier offset trimming and ADC reference scaling. Use Value: Supports 12-bit effective resolution through <0.05% V_Z drift over 1000-hour operational lifetime.

Industrial Power Monitoring

Automotive Sensor Biasing

Use Scenario: Voltage reference for analog-to-digital converters monitoring 5 V supply rails in PLC I/O modules.

IC Role / Device Role / Timing Role: Zener diode providing stable 4.9 V reference to ADC reference input and op-amp bias networks.

Use Value: Maintains ±0.5% measurement accuracy over −40°C to +85°C ambient due to low r_d and controlled V_Z tolerance.

Use Scenario: Biasing voltage source for NTC thermistor signal conditioning in engine coolant temperature sensors.

IC Role / Device Role / Timing Role: Passive voltage clamp and reference generator ensuring consistent excitation current for resistive sensing elements.

Use Value: Enables <1% full-scale error across operating temperature range with no active components required.

IoT Edge Node Regulation

Medical Diagnostic Instrumentation

Use Scenario: Local 5 V stabilization for ultra-low-power microcontroller reset circuitry in battery-operated wireless sensors.

IC Role / Device Role / Timing Role: Low-leakage Zener supplying clean reset threshold voltage independent of main LDO output ripple.

Use Value: Reduces quiescent current by >2 µA versus standard 5.1 V Zener alternatives, extending battery life.

Use Scenario: Precision reference for analog front-end gain calibration in portable ECG signal acquisition units.

IC Role / Device Role / Timing Role: Stable DC reference source for programmable gain amplifier offset trimming and ADC reference scaling.

Use Value: Supports 12-bit effective resolution through <0.05% V_Z drift over 1000-hour operational lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4733A (ON Semiconductor)	V_Z = 5.1 V ±5%, P_d = 1 W, DO-41 package, r_d = 7 Ω - higher power but larger footprint and looser tolerance.	Requires PCB pad redesign; suitable only where higher power margin and less precision are acceptable.	Select when board-level heat sinking is available and ±5% V_Z tolerance suffices for cost-sensitive consumer designs.
BZX55-C5V1 (Vishay)	V_Z = 5.1 V ±5%, P_d = 500 mW, DO-35 package, r_d = 60 Ω - tighter r_d than 1N4733A but same tolerance and larger size than MHD.	Not compatible with 5 mm-pitch auto-insertion; requires manual or pick-and-place placement.	Choose when lower dynamic impedance is critical and MHD's insertion compatibility is not required.

Compared with 1N4733A and BZX55-C5V1, the HZS5A1TA-E offers tighter V_Z tolerance (±0.2 V), smaller MHD package for high-density layouts, and verified suitability for automated insertion - making it optimal for industrial-grade, volume-manufactured embedded systems requiring repeatable 4.9 V references.

Availability

HZS5A1TA-E is available at Aetrix Electronics and suitable for industrial power monitoring, automotive sensor biasing, IoT edge node regulation, and medical diagnostic instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for HZS5A1TA-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 HZS Series was developed by Renesas as a family of precision silicon planar Zener diodes targeting stable, low-leakage voltage reference and clamping functions in space-constrained, high-reliability power management subsystems.

FAQ

What is the exact zener voltage range specified for HZS5A1TA-E?

The HZS5A1TA-E has a guaranteed zener voltage range of 4.8 V to 5.0 V when tested at I_Z = 5 mA and T_a = 25°C. This corresponds to Grade B3 within the HZS5 family, as confirmed in the "Electrical Characteristics" table on page 3 of REJ03G0184-0500 Rev.5.00. The device is not rated for 5.1 V or wider tolerances.

Is HZS5A1TA-E suitable for surface-mount assembly?

No - the HZS5A1TA-E uses the MHD package, which is an axial-lead glass diode intended for through-hole mounting and high-speed automatic insertion with 5 mm pitch. It is not a surface-mount device and lacks solder pads or gull-wing leads. For SMD alternatives, consult Renesas' HZ3 series or third-party SOD-123 Zener offerings.

What is the maximum allowable reverse current for HZS5A1TA-E before breakdown?

The HZS5A1TA-E specifies a maximum reverse current I_R of 5 µA at V_R = 0.5 V (page 2, Electrical Characteristics). This is a pre-breakdown leakage specification - the device enters controlled zener conduction only above its rated V_Z (4.8–5.0 V), where current rises sharply per Fig.1. Operation below V_Z must respect this leakage limit for precision biasing.

Does HZS5A1TA-E meet RoHS compliance requirements?

Yes - Renesas confirms RoHS compliance for the HZS Series in accordance with EU Directive 2011/65/EU, as stated in Section 10 of the datasheet notice and verified via Renesas' material declarations. The MHD package contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is rated for lead-free reflow profile compatibility.

Can HZS5A1TA-E be used in automotive applications?

The HZS5A1TA-E is classified as "Standard" quality grade per Renesas' internal grading (Section 7 of datasheet notice), meaning it is approved for use in computers, office equipment, communications gear, and industrial robots - but not for automotive transportation systems without additional qualification. For AEC-Q200-compliant Zeners, Renesas recommends the RVZ series or equivalent qualified alternatives.

HZS5A1TA-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:: -

HZS5A1TA-E FAQ

1.How can I place an order for HZS5A1TA-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS5A1TA-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 HZS5A1TA-E reliable?

The price and inventory of HZS5A1TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS5A1TA-E is usually 5 days.

3.What payment methods are accepted for HZS5A1TA-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS5A1TA-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS5A1TA-E?

HZS5A1TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS5A1TA-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 HZS5A1TA-E?

For technical support, including HZS5A1TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS5A1TA-E requirements.

6.How does Aetrix verify that HZS5A1TA-E is sourced from the original manufacturer or authorized distributors?

All HZS5A1TA-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 HZS5A1TA-E meets industry standards.

7.What is the process for return or replacement of HZS5A1TA-E?

All HZS5A1TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS5A1TA-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 HZS5A1TA-E part is unused and in its original packaging.

Return procedure for HZS5A1TA-E:

1.Submit a request within 90 days.

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

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