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

Renesas HZS12A1LTA-E

Name: HZS12A1LTA-E
Brand: Renesas
SKU: HZS12A1LTA-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS12A1LTA-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS12A1LTA-E.pdf

Description:: DIODE ZENER

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Inventory:10,000

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Product details

Overview

HZS12A1LTA-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 11.6–12.1 V, 400 mW power dissipation, and dynamic resistance of 10.5 Ω at 0.5 mA test current - deployed in stabilized power supplies, sensor excitation, and ADC reference buffers.

For engineers reviewing the HZS12A1LTA-E datasheet, HZS12A1LTA-E pinout, HZS12A1LTA-E application, or HZS12A1LTA-E equivalent, key selection criteria include zener voltage tolerance (±0.5 V), low noise performance (1/3–1/10 that of HZ series), temperature coefficient behavior, junction temperature rating (200°C), and MHD package compatibility with 5 mm-pitch automated insertion.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across variable load and input conditions via controlled reverse-bias breakdown. Its planar construction ensures consistent zener impedance and low leakage (<1 μA at VR = 2.0 V), critical for high-accuracy reference designs.

The HZS12A1LTA-E exhibits a negative temperature coefficient near 0 mV/°C at ~12 V (per Fig.2), minimizing drift over temperature - a key differentiator versus higher-voltage variants. It is rated for continuous operation up to 200°C junction temperature and supports ambient temperatures from −55°C to +175°C in storage.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.6–12.1 V at I_Z = 0.5 mA - defines precise regulation point for feedback loops and reference rails
Dynamic Resistance (r_d)	10.5 Ω max at I_Z = 0.5 mA - determines output impedance and load regulation sensitivity
Power Dissipation (P_d)	400 mW at T_a = 25°C - sets maximum steady-state thermal budget on standard PCBs
Reverse Leakage (I_R)	≤1 μA at V_R = 2.0 V - ensures minimal error current in high-impedance reference nodes
Junction Temperature (T_j)	200°C max - enables reliable operation in thermally demanding industrial environments
Storage Temperature	−55°C to +175°C - supports wide-range logistics and extended shelf-life handling

Pinout & Package

The HZS12A1LTA-E is housed in the MHD package (JEITA code GRZZ0002ZC-A), a radial leaded, epoxy-molded diode case with 2.0 mm diameter body and 26 mm lead length - designed for 5 mm-pitch high-speed automatic insertion and compatible with paper-phenol PCBs (100 × 180 × 1.6 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	High-side reference node	Connected to regulated output or feedback point; polarity must be observed to avoid forward conduction
2 (Anode)	Ground/reference return	Serves as current sink path; ties to system ground or common reference plane

Key Features

Feature	Design Value
Low-noise Zener operation	Noise level ≈ 1/3–1/10 that of legacy HZ series - directly improves SNR in precision instrumentation front-ends
Stable voltage regulation	±0.5 V tolerance at 12 V nominal - reduces calibration overhead in factory-trimmed systems
Thermal robustness	200°C max junction temperature - allows use in under-hood automotive modules or industrial motor drives without derating
Automated assembly support	MHD package with 5 mm pitch - enables direct integration into high-volume SMT-compatible through-hole lines
Low leakage performance	≤1 μA reverse current at 2.0 V - preserves accuracy in µA-level bias networks and battery-powered references

Applications

Industrial Power Monitoring	Medical Sensor Signal Conditioning
Use Scenario: Real-time monitoring of 12 V DC bus voltage in PLC I/O modules with ±0.5% accuracy requirement. IC Role / Device Role / Timing Role: Shunt voltage reference for 12-bit SAR ADC input scaling and offset correction. Use Value: Enables <1 LSB measurement error over −40°C to +85°C due to low tempco and stable r_d.	Use Scenario: Excitation source for bridge-based pressure transducers in portable patient monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise 12 V reference for Wheatstone bridge biasing. Use Value: Reduces baseline noise floor by >10 dB versus standard Zeners, improving respiration signal resolution.
Test Equipment Reference Rails	Automotive Body Control Module
Use Scenario: Calibration reference in handheld multimeters requiring traceable 12 V output with <5 ppm/°C drift. IC Role / Device Role / Timing Role: Primary voltage standard for internal DAC and comparator thresholds. Use Value: Achieves ±0.1% total error over full temperature range without active compensation circuitry.	Use Scenario: Stable supply rail for CAN transceiver biasing and microcontroller reset supervision in BCMs. IC Role / Device Role / Timing Role: Overvoltage clamp and reference generator for LDO enable logic. Use Value: Maintains functional safety integrity during load-dump transients up to 40 V due to 200°C T_j rating.

Industrial Power Monitoring

Medical Sensor Signal Conditioning

Use Scenario: Real-time monitoring of 12 V DC bus voltage in PLC I/O modules with ±0.5% accuracy requirement.

IC Role / Device Role / Timing Role: Shunt voltage reference for 12-bit SAR ADC input scaling and offset correction.

Use Value: Enables <1 LSB measurement error over −40°C to +85°C due to low tempco and stable r_d.

Use Scenario: Excitation source for bridge-based pressure transducers in portable patient monitors.

IC Role / Device Role / Timing Role: Low-drift, low-noise 12 V reference for Wheatstone bridge biasing.

Use Value: Reduces baseline noise floor by >10 dB versus standard Zeners, improving respiration signal resolution.

Test Equipment Reference Rails

Automotive Body Control Module

Use Scenario: Calibration reference in handheld multimeters requiring traceable 12 V output with <5 ppm/°C drift.

IC Role / Device Role / Timing Role: Primary voltage standard for internal DAC and comparator thresholds.

Use Value: Achieves ±0.1% total error over full temperature range without active compensation circuitry.

Use Scenario: Stable supply rail for CAN transceiver biasing and microcontroller reset supervision in BCMs.

IC Role / Device Role / Timing Role: Overvoltage clamp and reference generator for LDO enable logic.

Use Value: Maintains functional safety integrity during load-dump transients up to 40 V due to 200°C T_j rating.

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
BZX84-C12LT1G (ON Semiconductor)	12 V nominal, ±5% tolerance (11.4–12.7 V), 350 mW P_d, r_d = 25 Ω - wider V_Z spread and higher impedance	Less suitable for sub-1% accuracy systems; acceptable for general-purpose clamping	Select when cost sensitivity outweighs precision requirements and thermal margin is ≥150°C
MMBZ5242B (Vishay)	12 V nominal, ±5% tolerance, 350 mW P_d, r_d = 30 Ω, SOT-23 package - surface-mount only, no axial leads	Requires PCB redesign; unsuitable for through-hole automation or high-power dissipation	Choose only for space-constrained PCBs where MHD footprint is unavailable and 400 mW rating is not needed

Compared with BZX84-C12LT1G and MMBZ5242B, the HZS12A1LTA-E delivers tighter voltage tolerance, lower dynamic resistance, higher power handling, and proven low-noise performance - making it the preferred choice for metrology-grade references and thermally aggressive environments where reliability and precision are co-prioritized.

Availability

HZS12A1LTA-E is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor signal conditioning, test equipment reference rails, and automotive body control modules requiring stable component supply with guaranteed long-term continuity.

Supply support for HZS12A1LTA-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 SoC solutions for industrial, automotive, and infrastructure markets - founded through the merger of NEC Electronics and Renesas Technology in 2010.

The HZS-L Series belongs to Renesas' precision analog portfolio, engineered specifically for low-noise, high-stability voltage reference applications in measurement, sensing, and power regulation systems where traditional Zener performance limits were constraining design margins.

FAQ

What is the exact zener voltage range for HZS12A1LTA-E at 0.5 mA test current?

The HZS12A1LTA-E has a specified zener voltage range of 11.6 V minimum to 12.1 V maximum when tested at I_Z = 0.5 mA and T_a = 25°C. This tight 0.5 V window reflects its role in precision reference applications, and the value is confirmed in the Electrical Characteristics table on page 3 of Renesas document REJ03G0166-0300 Rev.3.00.

Is HZS12A1LTA-E RoHS compliant and lead-free?

Yes, HZS12A1LTA-E meets EU RoHS Directive requirements. Renesas confirms environmental compliance for the HZS-L Series in accordance with applicable regulations, including restriction of lead and other hazardous substances - verified via material declarations and manufacturing process controls documented in Renesas' environmental compliance program.

What is the maximum allowable reverse current before breakdown in HZS12A1LTA-E?

The HZS12A1LTA-E specifies a maximum reverse leakage current (I_R) of 1 μA at V_R = 2.0 V and T_a = 25°C. This ultra-low leakage ensures minimal error contribution in high-impedance reference circuits and is measured per the test condition defined in the Electrical Characteristics table on page 2 of the datasheet.

Can HZS12A1LTA-E be used in automotive applications?

HZS12A1LTA-E is classified as a "Standard" quality grade device per Renesas' quality grading system and is intended for applications such as industrial equipment and test instruments - not for automotive safety-critical systems. For automotive use, Renesas offers AEC-Q101-qualified alternatives; HZS12A1LTA-E should only be applied in non-safety automotive subsystems with explicit customer validation.

What is the thermal resistance (R_θJA) of HZS12A1LTA-E in typical PCB mounting?

Renesas does not publish a specific R_θJA value for HZS12A1LTA-E in the HZS-L Series datasheet. However, Figure 3 shows power dissipation vs. ambient temperature for a standard 100 × 180 × 1.6 mm paper-phenol PCB, indicating 400 mW derates linearly to zero at ~150°C ambient - implying an effective R_θJA of approximately 375°C/W under those exact board conditions.

HZS12A1LTA-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:: -

HZS12A1LTA-E FAQ

1.How can I place an order for HZS12A1LTA-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS12A1LTA-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 HZS12A1LTA-E reliable?

The price and inventory of HZS12A1LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS12A1LTA-E is usually 5 days.

3.What payment methods are accepted for HZS12A1LTA-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS12A1LTA-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS12A1LTA-E?

HZS12A1LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS12A1LTA-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 HZS12A1LTA-E?

For technical support, including HZS12A1LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS12A1LTA-E requirements.

6.How does Aetrix verify that HZS12A1LTA-E is sourced from the original manufacturer or authorized distributors?

All HZS12A1LTA-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 HZS12A1LTA-E meets industry standards.

7.What is the process for return or replacement of HZS12A1LTA-E?

All HZS12A1LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS12A1LTA-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 HZS12A1LTA-E part is unused and in its original packaging.

Return procedure for HZS12A1LTA-E:

1.Submit a request within 90 days.

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

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