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Renesas HZ30-3LTD-E
- Part No.:
- HZ30-3LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ30-3LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
HZ30-3LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and precision regulation in analog signal chains and stabilized power supplies. It delivers a nominal zener voltage of 30.2–31.6 V at 0.5 mA test current, with dynamic resistance of 27.0 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C. It is used in high-stability reference circuits requiring reduced thermal drift and low noise floor.
For engineers reviewing the HZ30-3LTD-E datasheet, HZ30-3LTD-E pinout, HZ30-3LTD-E application, or HZ30-3LTD-E equivalent, this device is selected for low-noise analog references, precision shunt regulation, and voltage clamping where zener impedance and temperature coefficient are critical design parameters.
Technical Context
The HZ30-3LTD-E belongs to the HZ-L Series, engineered to achieve approximately 1/3–1/10 lower diode noise than the legacy HZ series. Its silicon planar construction ensures consistent breakdown characteristics and low leakage current (≤1 μA at VR = 2.0 V).
It operates as a two-terminal shunt regulator with cathode-anode polarity, designed for DC-biased applications only (per datasheet Note 1). The device exhibits a positive zener voltage temperature coefficient of +0.06 %/°C (≈+18 mV/°C) near 30 V, confirmed by Fig.2 in REJ03G0182-0300 Rev.3.00.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30.2–31.6 V at IZ = 0.5 mA - defines stable regulation range under nominal bias |
| Dynamic Resistance (rd) | 27.0 Ω max at IZ = 0.5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and heatsinking |
| Junction Temperature (Tj) | −55 to +175°C - enables operation in industrial and automotive under-hood environments |
| Reverse Leakage (IR) | ≤1 μA at VR = 2.0 V - ensures minimal error current in high-impedance reference nodes |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - standard axial-leaded through-hole package with orange body and navy-blue cathode band |
Pinout & Package
Package: DO-35 glass axial-leaded package per JEITA code GRZZ0002ZB-A; body color orange; cathode identified by navy-blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side terminal of reverse-biased junction | Connected to regulated voltage node; carries full zener current during regulation |
| 2 (Anode) | Low-side terminal (reference ground node) | Bias path return; must be held at stable potential relative to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Low diode noise | Approximately 1/3–1/10 lower than HZ-series predecessors - directly improves SNR in precision ADC references and low-level analog stages |
| Stable zener impedance | 27.0 Ω max at 0.5 mA - enables predictable loop gain and transient response in shunt regulator feedback networks |
| Wide operating temperature range | −55°C to +175°C junction - supports deployment in unheated industrial enclosures and engine-control modules |
| Low leakage current | ≤1 μA at 2.0 V reverse bias - minimizes error contribution in high-resistance voltage divider or op-amp reference inputs |
Applications
| Instrumentation Reference | Industrial Power Monitor |
|---|---|
|
Use Scenario: Precision 30 V reference for 16-bit SAR ADC front-end in portable multimeters and calibration equipment. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable excitation for ratiometric sensor measurements. Use Value: Low 27 Ω dynamic resistance and sub-μA leakage ensure <±0.02% reference error over temperature and time. |
Use Scenario: Overvoltage clamp and threshold detector in 24 V DC industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener-based crowbar circuit protecting downstream logic from supply transients. Use Value: 400 mW power rating and 175°C junction tolerance allow reliable operation during sustained 30 V surges without thermal runaway. |
| Audio Signal Conditioning | Medical Sensor Biasing |
|
Use Scenario: Low-noise bias source for JFET-input op-amps in studio-grade microphone preamplifiers. IC Role / Device Role / Timing Role: Ultra-low-noise shunt regulator replacing noisy IC references in analog signal path. Use Value: Diode noise reduction (vs. HZ series) lowers integrated noise floor by >10 dB in 20 Hz–20 kHz band. |
Use Scenario: Stable excitation voltage for bridge-type pressure sensors in non-life-support medical diagnostic devices. IC Role / Device Role / Timing Role: Precision shunt reference in battery-powered handheld ultrasound probe front-ends. Use Value: 30.2–31.6 V range matches common sensor excitation requirements while maintaining ±0.5% accuracy across −20°C to +70°C ambient. |
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 |
|---|---|---|---|
| 1N5257B (ON Semiconductor) | Zener voltage 30 V ±5%, rd = 35 Ω, Pd = 500 mW, DO-35 package | Higher dynamic resistance increases regulation error under load variation; wider VZ tolerance affects absolute accuracy | Select when higher power margin is prioritized over low-noise performance and tight VZ matching |
| BZX55-C30 (Vishay) | Zener voltage 30 V ±5%, rd = 30 Ω, Pd = 500 mW, DO-35 package | Slightly higher impedance and no documented low-noise optimization; broader VZ spread reduces channel-to-channel matching | Choose for cost-sensitive industrial controls where sub-μA leakage and ultra-low noise are non-critical |
Compared with 1N5257B and BZX55-C30, the HZ30-3LTD-E provides superior noise performance and tighter VZ tolerance (±2.3% vs. ±5%), making it preferred for metrology-grade references and audio signal conditioning where spectral purity and stability are design-critical.
Availability
HZ30-3LTD-E is available at Aetrix Electronics and suitable for instrumentation reference, industrial power monitoring, audio signal conditioning, and medical sensor biasing requiring stable component supply and long-term parametric consistency.
Supply support for HZ30-3LTD-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 manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed by Renesas specifically for low-noise, high-stability voltage reference applications in precision analog systems-addressing demand for improved SNR and thermal stability over legacy Zener families.
FAQ
What is the exact zener voltage range for HZ30-3LTD-E?
The HZ30-3LTD-E has a guaranteed zener voltage range of 30.2 V to 31.6 V when tested at IZ = 0.5 mA and Ta = 25°C, as specified in the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. This 1.4 V span reflects the device's tight manufacturing tolerance within the HZ-L Series' 30 V nominal group.
Is HZ30-3LTD-E suitable for AC-coupled or switching applications?
No - the HZ30-3LTD-E is characterized and rated for DC operation only, as explicitly noted in the datasheet ("Tested with DC"). Its dynamic resistance and noise specifications apply under steady-state reverse bias; it is not validated for high-frequency or pulsed operation, and its DO-35 package lacks RF shielding or fast recovery characteristics required for AC or switching use.
Does HZ30-3LTD-E meet RoHS compliance?
Yes - HZ30-3LTD-E complies with the EU RoHS Directive, as confirmed by Renesas' environmental compliance documentation and material declarations. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits, and is rated for "Standard" quality grade applications.
What is the thermal derating behavior of HZ30-3LTD-E above 25°C ambient?
Per Fig.3 in REJ03G0182-0300 Rev.3.00, the HZ30-3LTD-E's power dissipation linearly derates from 400 mW at 25°C to 0 mW at 175°C ambient. The derating slope is approximately −3.2 mW/°C, meaning at 75°C ambient, maximum allowable Pd is ~240 mW. This requires appropriate PCB copper area or airflow for sustained 30 V/10 mA operation.
How does the noise performance of HZ30-3LTD-E compare to standard Zener diodes?
The HZ30-3LTD-E achieves approximately 1/3–1/10 lower diode noise than the legacy HZ series, as stated in the Features section of REJ03G0182-0300 Rev.3.00. This improvement stems from optimized silicon planar processing and tighter process control - verified by comparative noise spectral density measurements in Renesas' characterization reports for the HZ-L Series.
HZ30-3LTD-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:
- -
HZ30-3LTD-E FAQ
1.How can I place an order for HZ30-3LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ30-3LTD-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 HZ30-3LTD-E reliable?
The price and inventory of HZ30-3LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ30-3LTD-E is usually 5 days.
3.What payment methods are accepted for HZ30-3LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ30-3LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ30-3LTD-E?
HZ30-3LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ30-3LTD-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 HZ30-3LTD-E?
For technical support, including HZ30-3LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ30-3LTD-E requirements.
6.How does Aetrix verify that HZ30-3LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ30-3LTD-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 HZ30-3LTD-E meets industry standards.
7.What is the process for return or replacement of HZ30-3LTD-E?
All HZ30-3LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ30-3LTD-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 HZ30-3LTD-E part is unused and in its original packaging.
Return procedure for HZ30-3LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ30-3LTD-E Tags
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