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

Renesas HZ6C3L90TA

Name: HZ6C3L90TA
Brand: Renesas
SKU: HZ6C3L90TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ6C3L90TA

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ6C3L90TA.pdf

Description:: DIODE ZENER 0.4W

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Inventory:10,000

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Product details

Overview

HZ6C3L90TA from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 6.1–6.4 V at 0.5 mA, dynamic resistance of 60 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C - deployed in reference supplies for ADCs, sensor signal conditioning, and low-drift op-amp bias networks.

For engineers reviewing the HZ6C3L90TA datasheet, HZ6C3L90TA pinout, HZ6C3L90TA application, or HZ6C3L90TA equivalent, key selection criteria include verified low-noise performance (1/3–1/10 that of standard HZ series), tight V_Z tolerance, DO-35 package thermal derating behavior, and compatibility with DC-biased stabilization topologies requiring stable 6.25 V ±0.15 V references.

Technical Context

This device operates as a two-terminal, DC-biased voltage reference using silicon planar Zener breakdown at low current (0.5 mA test condition), optimized for minimal noise generation and low dynamic impedance. Its design targets applications where supply ripple rejection and thermal stability outweigh high-power handling needs.

The HZ6C3L90TA exhibits a negative zener voltage temperature coefficient near 6.25 V (≈ −0.04 %/°C per Fig.2), enabling predictable drift compensation in multi-device reference chains. It is not rated for transient surge suppression or AC-coupled operation, and requires external current limiting in all implementations.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.1–6.4 V at I_Z = 0.5 mA - defines stable reference point for low-current biasing and sensing circuits
Dynamic Resistance (r_d)	60 Ω max at I_Z = 0.5 mA - ensures minimal output voltage variation under small load current changes
Power Dissipation (P_d)	400 mW max at T_a = 25°C - sets absolute upper limit for continuous DC power handling in DO-35 package
Reverse Leakage (I_R)	1 μA max at V_R = 2.0 V - guarantees negligible error current in high-impedance reference nodes
Junction Temperature (T_j)	−55°C to +175°C - supports operation in industrial and automotive under-hood environments with proper PCB thermal relief
Noise Level	Approximately 1/3–1/10 that of standard HZ series - directly enables higher SNR in precision instrumentation front-ends

Pinout & Package

Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial body with navy blue cathode band; orange body color; mass ≈ 0.13 g; dimensions per SC-40 standard (φD = 2.0 mm, E = 4.2 mm, L = 26.0 mm).

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	High-impedance Zener breakdown terminal	Connected to regulated positive rail; reverse-biased during normal operation; carries full reference current
2 (Anode)	Reference ground return path	Typically tied to system ground or virtual ground; must maintain low-impedance connection to minimize noise coupling

Key Features

Feature	Design Value
Low-noise Zener structure	1/3–1/10 noise vs. legacy HZ series - measurable improvement in spectral density below 10 kHz for audio and sensor references
Tight V_Z tolerance	±0.15 V at 6.25 V nominal - reduces calibration burden in factory-trimmed analog modules
Low dynamic impedance	60 Ω max - maintains <0.1% output deviation across ±100 μA load shifts in buffered reference designs
Controlled temperature coefficient	≈ −0.04 %/°C near 6.25 V - enables predictable drift modeling in temperature-compensated circuits
DO-35 mechanical standardization	JEITA GRZZ0002ZB-A compliant - ensures compatibility with legacy through-hole assembly tooling and rework fixtures

Applications

High-Precision ADC Reference	Low-Drift Op-Amp Biasing
Use Scenario: Providing stable 6.25 V reference for 16-bit SAR ADCs in data acquisition systems operating over −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Two-terminal DC voltage reference establishing V_REF input for ADC internal conversion ladder. Use Value: Enables <±0.5 LSB integral nonlinearity by minimizing reference drift and noise-induced quantization uncertainty.	Use Scenario: Setting common-mode voltage for rail-to-rail input op-amps in thermocouple amplifier stages with <1 μV/°C offset drift requirement. IC Role / Device Role / Timing Role: Passive Zener node generating fixed bias point for differential input stage quiescent current control. Use Value: Reduces input-referred offset drift by 3× compared to standard Zener alternatives due to lower noise and tighter V_Z tolerance.
Sensor Signal Conditioning	Industrial Current Loop Reference
Use Scenario: Supplying excitation voltage for precision RTD bridges in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for Wheatstone bridge excitation in 4-wire configurations. Use Value: Limits bridge output error to <0.02% FS over temperature by suppressing reference-induced gain and offset errors.	Use Scenario: Generating 6.25 V reference for 4–20 mA transmitter ICs in hazardous-area field instruments with intrinsic safety requirements. IC Role / Device Role / Timing Role: Isolated, low-power Zener node defining loop compliance voltage threshold in analog output stages. Use Value: Supports safe operation at 400 mW max dissipation while maintaining <10 ppm/°C effective TC via PCB thermal design.

High-Precision ADC Reference

Low-Drift Op-Amp Biasing

Use Scenario: Providing stable 6.25 V reference for 16-bit SAR ADCs in data acquisition systems operating over −40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Two-terminal DC voltage reference establishing V_REF input for ADC internal conversion ladder.

Use Value: Enables <±0.5 LSB integral nonlinearity by minimizing reference drift and noise-induced quantization uncertainty.

Use Scenario: Setting common-mode voltage for rail-to-rail input op-amps in thermocouple amplifier stages with <1 μV/°C offset drift requirement.

IC Role / Device Role / Timing Role: Passive Zener node generating fixed bias point for differential input stage quiescent current control.

Use Value: Reduces input-referred offset drift by 3× compared to standard Zener alternatives due to lower noise and tighter V_Z tolerance.

Sensor Signal Conditioning

Industrial Current Loop Reference

Use Scenario: Supplying excitation voltage for precision RTD bridges in programmable logic controller (PLC) analog input modules.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for Wheatstone bridge excitation in 4-wire configurations.

Use Value: Limits bridge output error to <0.02% FS over temperature by suppressing reference-induced gain and offset errors.

Use Scenario: Generating 6.25 V reference for 4–20 mA transmitter ICs in hazardous-area field instruments with intrinsic safety requirements.

IC Role / Device Role / Timing Role: Isolated, low-power Zener node defining loop compliance voltage threshold in analog output stages.

Use Value: Supports safe operation at 400 mW max dissipation while maintaining <10 ppm/°C effective TC via PCB thermal design.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5226BS	V_Z = 3.3 V (fixed), P_d = 300 mW, r_d = 17 Ω, DO-35 package	Lower voltage grade; unsuitable for 6.25 V reference needs; better for 3.3 V logic-level clamping	Select only if system requires 3.3 V reference and lower dynamic impedance is prioritized over noise performance
Diodes Incorporated BZX55C6V2	V_Z = 6.2 V (±5%), P_d = 500 mW, r_d = 10 Ω, DO-35 package, no published noise spec	Higher power rating but uncharacterized noise; wider V_Z tolerance; lacks documented low-noise optimization	Acceptable for cost-sensitive, non-precision applications where 6.2 V ±0.31 V tolerance is sufficient and noise is not critical

Compared with MMBZ5226BS and BZX55C6V2, the HZ6C3L90TA delivers uniquely characterized low-noise operation and tighter V_Z tolerance at 6.25 V, making it irreplaceable in metrology-grade references - whereas the alternatives serve general-purpose regulation or lower-voltage use cases.

Availability

HZ6C3L90TA is available at Aetrix Electronics and suitable for high-precision ADC reference, low-drift op-amp biasing, and sensor signal conditioning applications requiring stable component supply, long-term parametric consistency, and traceable manufacturing history.

Supply support for HZ6C3L90TA 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 Technology Corp. is a Japanese semiconductor manufacturer specializing in microcontrollers, analog mixed-signal devices, and power management ICs for industrial, automotive, and infrastructure markets.

The HZ-L Series was designed specifically for low-noise, low-drift voltage reference applications in precision analog signal chains - targeting instrumentation, test equipment, and high-fidelity sensor interfaces where conventional Zeners introduce unacceptable noise floor elevation.

FAQ

What is the exact zener voltage range specified for HZ6C3L90TA?

The HZ6C3L90TA has a guaranteed zener voltage range of 6.1 V to 6.4 V when tested at I_Z = 0.5 mA and T_a = 25°C. This 0.3 V span reflects the device's tight process control for precision reference use, and the typical value is 6.25 V. The specification is confirmed in the Electrical Characteristics table on page 2 of REJ03G0182-0300 Rev.3.00.

Does HZ6C3L90TA support AC-coupled or transient applications?

No, the HZ6C3L90TA is rated exclusively for DC-biased operation, as explicitly stated in Note 1 ("Tested with DC") and its Absolute Maximum Ratings table. It is not characterized for surge current, reverse recovery time, or AC impedance - use dedicated TVS or transient suppressors for such functions. The HZ6C3L90TA must be operated within its 400 mW DC power limit with appropriate series current limiting.

How does the noise performance of HZ6C3L90TA compare to standard Zener diodes?

The HZ6C3L90TA achieves approximately 1/3 to 1/10 the noise level of Renesas' legacy HZ-series Zeners, as documented in the Features section of REJ03G0182-0300. This reduction is process-derived and validated under DC bias conditions - critical for applications like audio preamplifier references or high-resolution sensor excitation where broadband noise degrades effective resolution.

What is the thermal derating behavior of HZ6C3L90TA above 25°C ambient?

The HZ6C3L90TA follows standard DO-35 thermal derating: its 400 mW maximum power dissipation linearly decreases above 25°C ambient, reaching zero at 175°C junction temperature. Derating slope is ~3.2 mW/°C (per Fig.3), meaning at 75°C ambient, max allowable P_d drops to ~240 mW. PCB copper area and airflow must be modeled accordingly for sustained operation.

Is HZ6C3L90TA suitable for use in automotive under-hood environments?

The HZ6C3L90TA has a storage temperature range of −55°C to +175°C and junction temperature rating up to 175°C, satisfying under-hood thermal extremes. However, Renesas explicitly states in Page 5 Notes that HZ-L Series devices are *not* qualified for automotive safety-critical systems. Use requires full system-level qualification per AEC-Q101 if deployed in production automotive hardware.

HZ6C3L90TA 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:: -

HZ6C3L90TA FAQ

1.How can I place an order for HZ6C3L90TA through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ6C3L90TA 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 HZ6C3L90TA reliable?

The price and inventory of HZ6C3L90TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6C3L90TA is usually 5 days.

3.What payment methods are accepted for HZ6C3L90TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6C3L90TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ6C3L90TA?

HZ6C3L90TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ6C3L90TA 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 HZ6C3L90TA?

For technical support, including HZ6C3L90TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6C3L90TA requirements.

6.How does Aetrix verify that HZ6C3L90TA is sourced from the original manufacturer or authorized distributors?

All HZ6C3L90TA 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 HZ6C3L90TA meets industry standards.

7.What is the process for return or replacement of HZ6C3L90TA?

All HZ6C3L90TA units undergo pre-shipment inspection (PSI). If there is an issue with HZ6C3L90TA, 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 HZ6C3L90TA part is unused and in its original packaging.

Return procedure for HZ6C3L90TA:

1.Submit a request within 90 days.

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

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